Articles | Volume 20, issue 12
https://doi.org/10.5194/acp-20-7307-2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Special issue:
https://doi.org/10.5194/acp-20-7307-2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
25 Jun 2020
Research article |
| 25 Jun 2020
| 25 Jun 2020
Cloud condensation nuclei characteristics during the Indian summer monsoon over a rain-shadow region
Venugopalan Nair Jayachandran
CORRESPONDING AUTHOR
Indian Institute of Tropical Meteorology, Ministry of Earth Sciences, India
Mercy Varghese
Indian Institute of Tropical Meteorology, Ministry of Earth Sciences, India
Palani Murugavel
Indian Institute of Tropical Meteorology, Ministry of Earth Sciences, India
Kiran S. Todekar
Indian Institute of Tropical Meteorology, Ministry of Earth Sciences, India
Shivdas P. Bankar
Indian Institute of Tropical Meteorology, Ministry of Earth Sciences, India
Neelam Malap
Indian Institute of Tropical Meteorology, Ministry of Earth Sciences, India
Gurnule Dinesh
Indian Institute of Tropical Meteorology, Ministry of Earth Sciences, India
Pramod D. Safai
Indian Institute of Tropical Meteorology, Ministry of Earth Sciences, India
Jaya Rao
Indian Institute of Tropical Meteorology, Ministry of Earth Sciences, India
Mahen Konwar
Indian Institute of Tropical Meteorology, Ministry of Earth Sciences, India
Shivsai Dixit
Indian Institute of Tropical Meteorology, Ministry of Earth Sciences, India
Thara V. Prabha
Indian Institute of Tropical Meteorology, Ministry of Earth Sciences, India
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The first observations of refractory black carbon aerosol size distributions and mixing state in South Asian outflow to the northern Indian Ocean were carried out as a part of the ICARB-2018 experiment during winter. Size distributions indicated mixed sources of BC particles in the outflow, which are thickly coated. The coating thickness of BC is controlled mainly by the availability of condensable species in the outflow.
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Extensive airborne measurements of aerosol number–size distribution and black carbon (BC) profiles are carried out for the first time across the IGP prior to the onset of the Indian summer monsoon. These measurements, combined with spaceborne sensors and model results, provided an east–west transect of the role of mineral dust (local and transported) in the aerosol loading across the IGP, with an increase in coarse mode concentration and coarse mode mass fraction with altitude.
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Mahen Konwar, Benjamin Werden, Edward C. Fortner, Sudarsan Bera, Mercy Varghese, Subharthi Chowdhuri, Kurt Hibert, Philip Croteau, John Jayne, Manjula Canagaratna, Neelam Malap, Sandeep Jayakumar, Shivsai A. Dixit, Palani Murugavel, Duncan Axisa, Darrel Baumgardner, Peter F. DeCarlo, Doug R. Worsnop, and Thara Prabhakaran
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Revised manuscript accepted for AMT
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In a warm cloud seeding experiment hygroscopic particles are released to alter cloud processes to induce early raindrops. During Cloud Aerosol Interaction and Precipitation Enhancement Experiment, airborne mini-Aerosol Mass Spectrometers analyze the particles on which clouds form. The seeded clouds showed higher concentrations of Chlorine (Cl) and potassium (K), the oxidizing agents of flares. Small cloud droplet concentrations increased, and seeding particles were detected in deep cloud depths.
Sobhan Kumar Kompalli, Surendran Nair Suresh Babu, Krishnaswamy Krishna Moorthy, Sreedharan Krishnakumari Satheesh, Mukunda Madhab Gogoi, Vijayakumar S. Nair, Venugopalan Nair Jayachandran, Dantong Liu, Michael J. Flynn, and Hugh Coe
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The first observations of refractory black carbon aerosol size distributions and mixing state in South Asian outflow to the northern Indian Ocean were carried out as a part of the ICARB-2018 experiment during winter. Size distributions indicated mixed sources of BC particles in the outflow, which are thickly coated. The coating thickness of BC is controlled mainly by the availability of condensable species in the outflow.
Mukunda Madhab Gogoi, Venugopalan Nair Jayachandran, Aditya Vaishya, Surendran Nair Suresh Babu, Sreedharan Krishnakumari Satheesh, and Krishnaswamy Krishna Moorthy
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Extensive airborne measurements of aerosol number–size distribution and black carbon (BC) profiles are carried out for the first time across the IGP prior to the onset of the Indian summer monsoon. These measurements, combined with spaceborne sensors and model results, provided an east–west transect of the role of mineral dust (local and transported) in the aerosol loading across the IGP, with an increase in coarse mode concentration and coarse mode mass fraction with altitude.
Vijayakumar S. Nair, Venugopalan Nair Jayachandran, Sobhan Kumar Kompalli, Mukunda M. Gogoi, and S. Suresh Babu
Atmos. Chem. Phys., 20, 3135–3149, https://doi.org/10.5194/acp-20-3135-2020, https://doi.org/10.5194/acp-20-3135-2020, 2020
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Extensive measurements of the aerosol and cloud condensation nuclei (CCN) properties in South Asian outflow to the northern Indian Ocean were carried out as a part of the ICARB-2018 experiment during winter. At high supersaturations, most of the aerosols in the South Asian outflow become activated as CCN, whereas the aerosol system over the equatorial Indian Ocean is less CCN efficient even at higher supersaturations.
Venugopalan Nair Jayachandran, Surendran Nair Suresh Babu, Aditya Vaishya, Mukunda M. Gogoi, Vijayakumar S. Nair, Sreedharan Krishnakumari Satheesh, and Krishnaswamy Krishna Moorthy
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Concurrent measurements of the altitude profiles of the concentration of cloud condensation nuclei (CCNs), as a function of supersaturation (ranging from 0.2 % to 1.0 %), and aerosol optical properties were carried out aboard an instrumented aircraft across the Indo-Gangetic Plain (IGP) just prior to the onset of the 2016 Indian summer monsoon (ISM). A high CCN concentration is observed up to 2.5 km across the IGP, indicating the significant possibility of aerosol indirect effects.
Aditya Vaishya, Surendran Nair Suresh Babu, Venugopalan Jayachandran, Mukunda M. Gogoi, Naduparambil Bharathan Lakshmi, Krishnaswamy Krishna Moorthy, and Sreedharan Krishnakumari Satheesh
Atmos. Chem. Phys., 18, 17669–17685, https://doi.org/10.5194/acp-18-17669-2018, https://doi.org/10.5194/acp-18-17669-2018, 2018
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Aircraft-based measurements of vertical profiles of aerosol properties, across the Indo-Gangetic Plain (IGP), prior to onset of the Indian summer monsoon reveal a highly absorbing aerosol system over the IGP. Aerosols over the west IGP are mostly natural, larger in size and scatter light efficiently. Those over the central and eastern IGP are mostly anthropogenic in origin, smaller in size and absorb more light. Elevated absorbing aerosol layers may modulate regional precipitation patterns.
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Vasudevan Anil Kumar, Govindan Pandithurai, Parakkatt Parambil Leena, Kundan K. Dani, Palani Murugavel, Sunil M. Sonbawne, Rohit D. Patil, and Rajamma Sukumaran Maheskumar
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The effect of atmospheric aerosols on cloud properties is not very well understood in the Indian region, especially over Western Ghats, which is influenced by natural and anthropogenic aerosols. Collocated measurements of aerosol and cloud properties were used to estimate aerosol indirect effects using two methods: one with cloud drop number concentration and the other with cloud droplet size. Discrepancy between both methods is discussed, and the necessity of dispersion offset is emphasized.
W. W. Grabowski, L.-P. Wang, and T. V. Prabha
Atmos. Chem. Phys., 15, 913–926, https://doi.org/10.5194/acp-15-913-2015, https://doi.org/10.5194/acp-15-913-2015, 2015
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Subject: Aerosols | Research Activity: Field Measurements | Altitude Range: Troposphere | Science Focus: Physics (physical properties and processes)
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To be able to meet global grand challenges, we need comprehensive open data with proper metadata. In this opinion paper, we describe the SMEAR (Station for Measuring Earth surface – Atmosphere Relations) concept and include several examples (cases), such as new particle formation and growth, feedback loops and the effect of COVID-19, and what has been learned from these investigations. The future needs and the potential of comprehensive observations of the environment are summarized.
Weilun Zhao, Ying Li, Gang Zhao, Song Guo, Nan Ma, Shuya Hu, and Chunsheng Zhao
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Studies have concentrated on particles containing black carbon (BC) smaller than 700 nm because of technical limitations. In this study, BC-containing particles larger than 700 nm (BC>700) were measured, highlighting their importance to total BC mass and absorption. The contribution of BC>700 to the BC direct radiative effect was estimated, highlighting the necessity to consider the whole size range of BC-containing particles in the model estimation of BC radiative effects.
Alessandro Bigi, Giorgio Veratti, Elisabeth Andrews, Martine Collaud Coen, Lorenzo Guerrieri, Vera Bernardoni, Dario Massabò, Luca Ferrero, Sergio Teggi, and Grazia Ghermandi
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Atmospheric particles include compounds that play a key role in the greenhouse effect and air toxicity. Concurrent observations of these compounds by multiple instruments are presented, following deployment within an urban environment in the Po Valley, one of Europe's pollution hotspots. The study compares these data, highlighting the impact of ground emissions, mainly vehicular traffic and biomass burning, on the absorption of sun radiation and, ultimately, on climate change and air quality.
Ghislain Motos, Gabriel Freitas, Paraskevi Georgakaki, Jörg Wieder, Guangyu Li, Wenche Aas, Chris Lunder, Radovan Krejci, Julie Thérèse Pasquier, Jan Henneberger, Robert Oscar David, Christoph Ritter, Claudia Mohr, Paul Zieger, and Athanasios Nenes
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Low-altitude clouds play a key role in regulating the climate of the Arctic, a region that suffers from climate change more than any other on the planet. We gathered meteorological and aerosol physical and chemical data over a year and utilized them for a parameterization that help us unravel the factors driving and limiting the efficiency of cloud droplet formation. We then linked this information to the sources of aerosol found during each season and to processes of cloud glaciation.
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The sources and concentrations of ice-nucleating particles (INPs) in the Arctic are still poorly understood. Here we report aircraft-based INP concentrations and aerosol composition in the western North American Arctic. The concentrations of INPs and all aerosol particles were low. The aerosol samples contained mostly sea salt and dust particles. Dust particles were more relevant for the INP concentrations than sea salt. However, dust alone cannot account for all of the measured INPs.
Katherine L. Ackerman, Alison D. Nugent, and Chung Taing
Atmos. Chem. Phys., 23, 13735–13753, https://doi.org/10.5194/acp-23-13735-2023, https://doi.org/10.5194/acp-23-13735-2023, 2023
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Sea salt aerosol is an important marine aerosol that may be produced in greater quantities in coastal regions than over the open ocean. This study observed these particles along the windward coastline of O'ahu, Hawai'i, to understand how wind and waves influence their production and dispersal. Overall, wave heights were the strongest variable correlated with changes in aerosol concentrations, while wind speeds played an important role in their horizontal dispersal and vertical mixing.
Jiyeon Park, Hyojin Kang, Yeontae Gim, Eunho Jang, Ki-Tae Park, Sangjong Park, Chang Hoon Jung, Darius Ceburnis, Colin O'Dowd, and Young Jun Yoon
Atmos. Chem. Phys., 23, 13625–13646, https://doi.org/10.5194/acp-23-13625-2023, https://doi.org/10.5194/acp-23-13625-2023, 2023
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We measured the number size distribution of 2.5–300 nm particles and cloud condensation nuclei (CCN) number concentrations at King Sejong Station on the Antarctic Peninsula continuously from 1 January to 31 December 2018. During the pristine and clean periods, 97 new particle formation (NPF) events were detected. For 83 of these, CCN concentrations increased by 2 %–268 % (median 44 %) following 1 to 36 h (median 8 h) after NPF events.
Xiangxinyue Meng, Zhijun Wu, Jingchuan Chen, Yanting Qiu, Taomou Zong, Mijung Song, Jiyi Lee, and Min Hu
EGUsphere, https://doi.org/10.5194/egusphere-2023-2204, https://doi.org/10.5194/egusphere-2023-2204, 2023
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Our findings revealed that particles predominantly exist as semi-solid or solid during clean winter days with RH below 30 %. However, non-liquid to liquid phase transition occurred when the ALW mass fraction surpassed 15 % (dry mass) at transition RH thresholds ranging from 40 % to 60 %. Additionally, we provide insights into the increasingly important roles of particle-phase state variation and aerosol liquid water in secondary particulate growth during haze formation in Beijing, China.
Aodong Du, Jiaxing Sun, Hang Liu, Weiqi Xu, Wei Zhou, Yuting Zhang, Lei Li, Xubing Du, Yan Li, Xiaole Pan, Zifa Wang, and Yele Sun
Atmos. Chem. Phys., 23, 13597–13611, https://doi.org/10.5194/acp-23-13597-2023, https://doi.org/10.5194/acp-23-13597-2023, 2023
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We characterized the impacts of emission controls on particle mixing state and density during the Beijing Olympic Winter Games using a SPAMS in tandem with a DMA and an AAC. OC and sulfate-containing particles increased, while those from primary emissions decreased. The effective particle densities increased and varied largely for different particles, highlighting the impacts of aging and formation processes on the changes of particle density and mixing state.
Karine Sellegri, Theresa Barthelmeß, Jonathan Trueblood, Antonia Cristi, Evelyn Freney, Clémence Rose, Neill Barr, Mike Harvey, Karl Safi, Stacy Deppeler, Karen Thompson, Wayne Dillon, Anja Engel, and Cliff Law
Atmos. Chem. Phys., 23, 12949–12964, https://doi.org/10.5194/acp-23-12949-2023, https://doi.org/10.5194/acp-23-12949-2023, 2023
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The amount of sea spray emitted to the atmosphere depends on the ocean temperature, but this dependency is not well understood, especially when ocean biology is involved. In this study, we show that sea spray emissions are increased by up to a factor of 4 at low seawater temperatures compared to moderate temperatures, and we quantify the temperature dependence as a function of the ocean biogeochemistry.
Albert Ansmann, Kevin Ohneiser, Ronny Engelmann, Martin Radenz, Hannes Griesche, Julian Hofer, Dietrich Althausen, Jessie M. Creamean, Matthew C. Boyer, Daniel A. Knopf, Sandro Dahlke, Marion Maturilli, Henriette Gebauer, Johannes Bühl, Cristofer Jimenez, Patric Seifert, and Ulla Wandinger
Atmos. Chem. Phys., 23, 12821–12849, https://doi.org/10.5194/acp-23-12821-2023, https://doi.org/10.5194/acp-23-12821-2023, 2023
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The 1-year MOSAiC (2019–2020) expedition with the German ice breaker Polarstern was the largest polar field campaign ever conducted. The Polarstern, with our lidar aboard, drifted with the pack ice north of 85° N for more than 7 months (October 2019 to mid-May 2020). We measured the full annual cycle of aerosol conditions in terms of aerosol optical and cloud-process-relevant properties. We observed a strong contrast between polluted winter and clean summer aerosol conditions.
Nair Krishnan Kala, Narayana Sarma Anand, Mohanan R. Manoj, Srinivasan Prasanth, Harshavardhana S. Pathak, Thara Prabhakaran, Pramod D. Safai, Krishnaswamy K. Moorthy, and Sreedharan K. Satheesh
Atmos. Chem. Phys., 23, 12801–12819, https://doi.org/10.5194/acp-23-12801-2023, https://doi.org/10.5194/acp-23-12801-2023, 2023
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We present a 3D data set of aerosol black carbon over the Indian mainland by assimilating data from surface, aircraft, and balloon measurements, along with multi-satellite observations. Radiative transfer computations using height-resolved aerosol absorption show higher warming in the free troposphere and will have large implications for atmospheric stability. This data set will help reduce the uncertainty in aerosol radiative effects in climate model simulations over the Indian region.
Yueyue Cheng, Chao Liu, Jiandong Wang, Jiaping Wang, Dafeng Ge, Caijun Zhu, Jinbo Wang, and Aijun Ding
EGUsphere, https://doi.org/10.5194/egusphere-2023-2122, https://doi.org/10.5194/egusphere-2023-2122, 2023
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Brown carbon (BrC) is an important light-absorbing aerosol influencing the climate change. This study develops a BrC radiative forcing estimation method by a combination of conventional observations and numerical models. We find BrC absorption at 370 nm can be comparable to that of black carbon, and its influences on the radiative forcing, actinic flux and photosynthetically active radiation are unignorable.
Yiming Wang, Haolin Wang, Yujie Qin, Xinqi Xu, Guowen He, Nanxi Liu, Shengjie Miao, Xiao Lu, Haichao Wang, and Shaojia Fan
EGUsphere, https://doi.org/10.5194/egusphere-2023-2178, https://doi.org/10.5194/egusphere-2023-2178, 2023
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We conducted a vertical measurement of winter PM2.5 by a mobile multi-lidar system in four cities. Combined with the surface PM2.5 data, the ERA5 reanalysis data, as well as the GEOS-Chem simulations during Dec. 2018–Feb. 2019, we found the Transport-Nocturnal PM2.5 Enhancement by Subsidence (T-NPES) events widely occurred with high frequencies in plain regions in eastern China, while less happened in basin regions like Xi’an and Chengdu. We propose a conceptual model of the T-NPES events.
Sujan Shrestha, Shan Zhou, Manisha Mehra, Meghan Guagenti, Subin Yoon, Sergio L. Alvarez, Fangzhou Guo, Chun-Ying Chao, James H. Flynn III, Yuxuan Wang, Robert J. Griffin, Sascha Usenko, and Rebecca J. Sheesley
Atmos. Chem. Phys., 23, 10845–10867, https://doi.org/10.5194/acp-23-10845-2023, https://doi.org/10.5194/acp-23-10845-2023, 2023
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We evaluated different methods for assessing the influence of long-range transport of biomass burning (BB) plumes at a coastal site in Texas, USA. We show that the aerosol composition and optical properties exhibited good agreement, while CO and acetonitrile trends were less specific for assessing BB source influence. Our results demonstrate that the network of aerosol optical measurements can be useful for identifying the influence of aged BB plumes in anthropogenically influenced areas.
Guangyu Li, Elise K. Wilbourn, Zezhen Cheng, Jörg Wieder, Allison Fagerson, Jan Henneberger, Ghislain Motos, Rita Traversi, Sarah D. Brooks, Mauro Mazzola, Swarup China, Athanasios Nenes, Ulrike Lohmann, Naruki Hiranuma, and Zamin A. Kanji
Atmos. Chem. Phys., 23, 10489–10516, https://doi.org/10.5194/acp-23-10489-2023, https://doi.org/10.5194/acp-23-10489-2023, 2023
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In this work, we present results from an Arctic field campaign (NASCENT) in Ny-Ålesund, Svalbard, on the abundance, variability, physicochemical properties, and potential sources of ice-nucleating particles (INPs) relevant for mixed-phase cloud formation. This work improves the data coverage of Arctic INPs and aerosol properties, allowing for the validation of models predicting cloud microphysical and radiative properties of mixed-phase clouds in the rapidly warming Arctic.
Jun Shi, Jinpei Yan, Shanshan Wang, Shuhui Zhao, Miming Zhang, Suqing Xu, Qi Lin, Hang Yang, and Siying Dai
Atmos. Chem. Phys., 23, 10349–10359, https://doi.org/10.5194/acp-23-10349-2023, https://doi.org/10.5194/acp-23-10349-2023, 2023
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An underway aerosol-monitoring system was used to determine the Na+ concentration during different cyclone periods in the Southern Ocean in order to assess the potential effects of cyclones on sea spray aerosol (SSA) emissions. It was estimated that more than 23 % of SSAs were transported upwards during cyclone periods. Vertically transported SSAs can be regarded as an important source of CCN and hence have an effect on climate in the middle and high latitudes of the Southern Hemisphere.
Jean-Philippe Putaud, Enrico Pisoni, Alexander Mangold, Christoph Hueglin, Jean Sciare, Michael Pikridas, Chrysanthos Savvides, Jakub Ondracek, Saliou Mbengue, Alfred Wiedensohler, Kay Weinhold, Maik Merkel, Laurent Poulain, Dominik van Pinxteren, Hartmut Herrmann, Andreas Massling, Claus Nordstroem, Andrés Alastuey, Cristina Reche, Noemí Pérez, Sonia Castillo, Mar Sorribas, Jose Antonio Adame, Tuukka Petaja, Katrianne Lehtipalo, Jarkko Niemi, Véronique Riffault, Joel F. de Brito, Augustin Colette, Olivier Favez, Jean-Eudes Petit, Valérie Gros, Maria I. Gini, Stergios Vratolis, Konstantinos Eleftheriadis, Evangelia Diapouli, Hugo Denier van der Gon, Karl Espen Yttri, and Wenche Aas
Atmos. Chem. Phys., 23, 10145–10161, https://doi.org/10.5194/acp-23-10145-2023, https://doi.org/10.5194/acp-23-10145-2023, 2023
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Many European people are still exposed to levels of air pollution that can affect their health. COVID-19 lockdowns in 2020 were used to assess the impact of the reduction in human mobility on air pollution across Europe by comparing measurement data with values that would be expected if no lockdown had occurred. We show that lockdown measures did not lead to consistent decreases in the concentrations of fine particulate matter suspended in the air, and we investigate why.
Qian Xiao, Jiaoshi Zhang, Yang Wang, Luke D. Ziemba, Ewan Crosbie, Edward L. Winstead, Claire E. Robinson, Joshua P. DiGangi, Glenn S. Diskin, Jeffrey S. Reid, K. Sebastian Schmidt, Armin Sorooshian, Miguel Ricardo A. Hilario, Sarah Woods, Paul Lawson, Snorre A. Stamnes, and Jian Wang
Atmos. Chem. Phys., 23, 9853–9871, https://doi.org/10.5194/acp-23-9853-2023, https://doi.org/10.5194/acp-23-9853-2023, 2023
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Using recent airborne measurements, we show that the influences of anthropogenic emissions, transport, convective clouds, and meteorology lead to new particle formation (NPF) under a variety of conditions and at different altitudes in tropical marine environments. NPF is enhanced by fresh urban emissions in convective outflow but is suppressed in air masses influenced by aged urban emissions where reactive precursors are mostly consumed while particle surface area remains relatively high.
Andrea Cuesta-Mosquera, Kristina Glojek, Griša Močnik, Luka Drinovec, Asta Gregorič, Martin Rigler, Matej Ogrin, Baseerat Romshoo, Kay Weinhold, Maik Merkel, Dominik van Pinxteren, Hartmut Herrmann, Alfred Wiedensohler, Mira Pöhlker, and Thomas Müller
EGUsphere, https://doi.org/10.5194/egusphere-2023-1874, https://doi.org/10.5194/egusphere-2023-1874, 2023
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This study evaluated the air pollution and climate impacts of residential wood burning particle emissions from a location in rural Europe. The authors investigate the physical properties that connect these emissions with climate change, through the evaluation of atmospheric radiative impacts via simple calculations. The study contributes to reducing the lack of information that produces large uncertainties in understanding the climate impacts of air pollution from anthropogenic sources.
Simo Hakala, Ville Vakkari, Heikki Lihavainen, Antti-Pekka Hyvärinen, Kimmo Neitola, Jenni Kontkanen, Veli-Matti Kerminen, Markku Kulmala, Tuukka Petäjä, Tareq Hussein, Mamdouh I. Khoder, Mansour A. Alghamdi, and Pauli Paasonen
Atmos. Chem. Phys., 23, 9287–9321, https://doi.org/10.5194/acp-23-9287-2023, https://doi.org/10.5194/acp-23-9287-2023, 2023
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Things are not always as they first seem in ambient aerosol measurements. Observations of decreasing particle sizes are often interpreted as resulting from particle evaporation. We show that such observations can counterintuitively be explained by particles that are constantly growing in size. This requires one to account for the previous movements of the observed air. Our explanation implies a larger number of larger particles, meaning more significant effects of aerosols on climate and health.
Akriti Masoom, Ilias Fountoulakis, Stelios Kazadzis, Ioannis-Panagiotis Raptis, Anna Kampouri, Basil E. Psiloglou, Dimitra Kouklaki, Kyriakoula Papachristopoulou, Eleni Marinou, Stavros Solomos, Anna Gialitaki, Dimitra Founda, Vasileios Salamalikis, Dimitris Kaskaoutis, Natalia Kouremeti, Nikolaos Mihalopoulos, Vassilis Amiridis, Andreas Kazantzidis, Alexandros Papayannis, Christos S. Zerefos, and Kostas Eleftheratos
Atmos. Chem. Phys., 23, 8487–8514, https://doi.org/10.5194/acp-23-8487-2023, https://doi.org/10.5194/acp-23-8487-2023, 2023
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We analyse the spatial and temporal aerosol spectral optical properties during the extreme wildfires of August 2021 in Greece and assess their effects on air quality and solar radiation quantities related to health, agriculture, and energy. Different aerosol conditions are identified (pure smoke, pure dust, dust–smoke together); the largest impact on solar radiation quantities is found for cases with mixed dust–smoke aerosols. Such situations are expected to occur more frequently in the future.
Xiaojing Shen, Junying Sun, Huizheng Che, Yangmei Zhang, Chunhong Zhou, Ke Gui, Wanyun Xu, Quan Liu, Junting Zhong, Can Xia, Xinyao Hu, Sinan Zhang, Jialing Wang, Shuo Liu, Jiayuan Lu, Aoyuan Yu, and Xiaoye Zhang
Atmos. Chem. Phys., 23, 8241–8257, https://doi.org/10.5194/acp-23-8241-2023, https://doi.org/10.5194/acp-23-8241-2023, 2023
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New particle formation (NPF) events occur when the dust episodes' fade is analysed based on long-term measurement of particle number size distribution. Analysis shows that the observed formation and growth rates are approximately 50 % of and 30 % lower than those of other NPF events. As a consequence of the uptake of precursor gases on mineral dust, the physical and chemical properties of submicron particles, as well as the ability to be cloud condensation nuclei, can be changed.
Marco Zanatta, Stephan Mertes, Olivier Jourdan, Regis Dupuy, Emma Järvinen, Martin Schnaiter, Oliver Eppers, Johannes Schneider, Zsófia Jurányi, and Andreas Herber
Atmos. Chem. Phys., 23, 7955–7973, https://doi.org/10.5194/acp-23-7955-2023, https://doi.org/10.5194/acp-23-7955-2023, 2023
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Black carbon (BC) particles influence the Arctic radiative balance. Vertical measurements of black carbon were conducted during the ACLOUD campaign in the European Arctic to study the interaction of BC with clouds. This study shows that clouds influence the vertical variability of BC properties across the inversion layer and that multiple activation and transformation mechanisms of BC may occur in the presence of low-level, persistent, mixed-phase clouds.
Guangdong Niu, Ximeng Qi, Liangduo Chen, Lian Xue, Shiyi Lai, Xin Huang, Jiaping Wang, Xuguang Chi, Wei Nie, Veli-Matti Kerminen, Tuukka Petäjä, Markku Kulmala, and Aijun Ding
Atmos. Chem. Phys., 23, 7521–7534, https://doi.org/10.5194/acp-23-7521-2023, https://doi.org/10.5194/acp-23-7521-2023, 2023
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The reported below-cloud wet-scavenging coefficients (BWSCs) are much higher than theoretical data, but the reason remains unclear. Based on long-term observation, we find that air mass changing during rainfall events causes the overestimation of BWSCs. Thus, the discrepancy in BWSCs between observation and theory is not as large as currently believed. To obtain reasonable BWSCs and parameterizations from field observations, the effect of air mass changes needs to be considered.
Andreas Petzold, Ulrich Bundke, Anca Hienola, Paolo Laj, Cathrine Lund Myhre, Alex Vermeulen, Angeliki Adamaki, Werner Kutsch, Valerie Thouret, Damien Boulanger, Markus Fiebig, Markus Stocker, Zhiming Zhao, and Ari Asmi
EGUsphere, https://doi.org/10.5194/egusphere-2023-1423, https://doi.org/10.5194/egusphere-2023-1423, 2023
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The atmosphere-centred European environmental research infrastructures ACTRIS, IAGOS and ICOS can assume a leading role in atmospheric sciences thanks to their capacities for acquisition and reporting of long-term and high-quality observational data. We elaborate on the novel research opportunities which evolve from the combination of open access to data, data interoperability and tools and technologies offered by data-intensive science through the European Open Science Cloud.
Anil Kumar Mandariya, Ajit Ahlawat, Mohamad M. V. Haneef, Nisar A. Baig, Kanan Patel, Joshua S. Apte, Lea Hildebrandt Ruiz, Alfred Wiedensohler, and Gazala Habib
EGUsphere, https://doi.org/10.5194/egusphere-2023-577, https://doi.org/10.5194/egusphere-2023-577, 2023
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The current study explored the temporal variation of size-selective particle hygroscopicity in Delhi first time. Here, we reported that the high volume fractional contribution of ammonium chloride into aerosol governs the high aerosol hygroscopicity and associated liquid water content based on the experimental data first time in Delhi. The episodically high ammonium chlorides present in Delhi's atmosphere could lead to haze and fog formation under high relative humidity in the region.
Antonio Donateo, Gianluca Pappaccogli, Daniela Famulari, Mauro Mazzola, Federico Scoto, and Stefano Decesari
Atmos. Chem. Phys., 23, 7425–7445, https://doi.org/10.5194/acp-23-7425-2023, https://doi.org/10.5194/acp-23-7425-2023, 2023
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This work aims to measure the turbulent fluxes and the dry deposition velocity for size-segregated particles (from ultrafine to quasi-coarse range) at an Arctic site (Svalbard). Aiming to characterize the effect of surface properties on dry deposition, continuous observations were performed from the coldest months (on snow surface) to the snow melting period and throughout the summer (snow-free surface). A data fit of the deposition velocity as a function of particle diameters will be provided.
Hang Liu, Xiaole Pan, Shandong Lei, Yuting Zhang, Aodong Du, Weijie Yao, Guiqian Tang, Tao Wang, Jinyuan Xin, Jie Li, Yele Sun, Junji Cao, and Zifa Wang
Atmos. Chem. Phys., 23, 7225–7239, https://doi.org/10.5194/acp-23-7225-2023, https://doi.org/10.5194/acp-23-7225-2023, 2023
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We provide the average vertical profiles of black carbon (BC) concentration, size distribution and coating thickness at different times of the day in an urban area based on 112 vertical profiles. In addition, it is found that BC in the residual layer generally has a thicker coating, higher absorption enhancement and hygroscopicity than on the surface. Such aged BC could enter into the boundary layer and influence the BC properties in the early morning.
Cristina González-Flórez, Martina Klose, Andrés Alastuey, Sylvain Dupont, Jerónimo Escribano, Vicken Etyemezian, Adolfo Gonzalez-Romero, Yue Huang, Konrad Kandler, George Nikolich, Agnesh Panta, Xavier Querol, Cristina Reche, Jesús Yus-Díez, and Carlos Pérez García-Pando
Atmos. Chem. Phys., 23, 7177–7212, https://doi.org/10.5194/acp-23-7177-2023, https://doi.org/10.5194/acp-23-7177-2023, 2023
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Atmospheric mineral dust consists of tiny mineral particles that are emitted by wind erosion from arid regions. Its particle size distribution (PSD) affects its impact on the Earth's system. Nowadays, there is an incomplete understanding of the emitted dust PSD and a lot of debate about its variability. Here, we try to address these issues based on the measurements performed during a wind erosion and dust emission field campaign in the Moroccan Sahara within the framework of FRAGMENT project.
Gabriela Rosalino Unfer, Luiz Augusto Toledo Machado, Paulo Artaxo, Marco Aurelio Franco, Leslie A. Kremper, Mira L. Pöhlker, Ulrich Pöschl, and Christopher Pöhlker
EGUsphere, https://doi.org/10.5194/egusphere-2023-1361, https://doi.org/10.5194/egusphere-2023-1361, 2023
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Amazonian aerosols and their interactions with precipitation were studied by proposing its understanding in a 3D space based on three parameters that characterize the concentration and size distribution of aerosols. The results showed characteristic arrangements regarding seasonal and diurnal cycles, as well as when interacting with precipitation. The use of this 3D space appears to be a promising tool for aerosol populations analysis and for model validation and parameterization.
Stergios Vratolis, Evangelia Diapouli, Manousos I. Manousakas, Susana Marta Almeida, Ivan Beslic, Zsofia Kertesz, Lucyna Samek, and Konstantinos Eleftheriadis
Atmos. Chem. Phys., 23, 6941–6961, https://doi.org/10.5194/acp-23-6941-2023, https://doi.org/10.5194/acp-23-6941-2023, 2023
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Using a dataset from 16 European and Asian cities we develop a new method so as to identify and quantify the emission fluxes from each geographic grid cell for secondary sulfate and dust aerosol. The information provided by the new method allows the implementation of targeted mitigation measures. The new method could be applied to several other pollutants (e.g., black carbon).
Yishuo Guo, Chenjuan Deng, Aino Ovaska, Feixue Zheng, Chenjie Hua, Junlei Zhan, Yiran Li, Jin Wu, Zongcheng Wang, Jiali Xie, Ying Zhang, Tingyu Liu, Yusheng Zhang, Boying Song, Wei Ma, Yongchun Liu, Chao Yan, Jingkun Jiang, Veli-Matti Kerminen, Men Xia, Tuomo Nieminen, Wei Du, Tom Kokkonen, and Markku Kulmala
Atmos. Chem. Phys., 23, 6663–6690, https://doi.org/10.5194/acp-23-6663-2023, https://doi.org/10.5194/acp-23-6663-2023, 2023
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Using the comprehensive datasets, we investigated the long-term variations of air pollutants during winter in Beijing from 2019 to 2022 and analyzed the characteristics of atmospheric pollution cocktail during different short-term special events (e.g., Beijing Winter Olympics, COVID lockdown and Chinese New Year) associated with substantial emission reductions. Our results are useful in planning more targeted and sustainable long-term pollution control plans.
Julika Zinke, E. Douglas Nilsson, Piotr Markuszewski, Paul Zieger, E. Monica Mårtensson, Anna Rutgersson, Erik Nilsson, and Matthew E. Salter
EGUsphere, https://doi.org/10.5194/egusphere-2023-966, https://doi.org/10.5194/egusphere-2023-966, 2023
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We conducted two research campaigns in the Baltic Sea, during which we combined laboratory sea spray simulation experiments with flux measurements on a nearby island. To combine these two methods, we scaled the laboratory measurements to the flux measurements using three different approaches. As a result, we derived a parameterization that is dependent on wind speed and wave state for particles with diameters 0.015–10 μm. This parameterization is applicable to low-salinity waters.
Larissa Lacher, Michael P. Adams, Kevin Barry, Barbara Bertozzi, Heinz Bingemer, Cristian Boffo, Yannick Bras, Nicole Büttner, Dimitri Castarede, Daniel J. Cziczo, Paul J. DeMott, Romy Fösig, Megan Goodell, Kristina Höhler, Thomas C. J. Hill, Conrad Jentzsch, Luis A. Ladino, Ezra J. T. Levin, Stephan Mertes, Ottmar Möhler, Kathryn A. Moore, Benjamin J. Murray, Jens Nadolny, Tatjana Pfeuffer, David Picard, Carolina Ramírez-Romero, Mickael Ribeiro, Sarah Richter, Jann Schrod, Karine Sellegri, Frank Stratmann, Benjamin E. Swanson, Erik Thomson, Heike Wex, Martin Wolf, and Evelyn Freney
EGUsphere, https://doi.org/10.5194/egusphere-2023-1125, https://doi.org/10.5194/egusphere-2023-1125, 2023
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Aerosol particles that trigger ice formation in clouds are important for the climate system but are very rare in the atmosphere, challenging measurement techniques. Here we compare three cloud chambers and seven methods collecting aerosol particles on filters for offline analysis at a mountaintop station. A general good agreement of the methods was found when sampling aerosol particles behind a whole air inlet, supporting their use to obtain valid data.
Fei Li, Biao Luo, Miaomiao Zhai, Li Liu, Gang Zhao, Hanbing Xu, Tao Deng, Xuejiao Deng, Haobo Tan, Ye Kuang, and Jun Zhao
Atmos. Chem. Phys., 23, 6545–6558, https://doi.org/10.5194/acp-23-6545-2023, https://doi.org/10.5194/acp-23-6545-2023, 2023
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A field campaign was conducted to study black carbon (BC) mass size distributions and mixing states connected to traffic emissions using a system that combines a differential mobility analyzer and single-particle soot photometer. Results showed that the black carbon content of traffic emissions has a considerable influence on both BC mass size distributions and mixing states, which has crucial implications for accurately representing BC from various sources in regional and climate models.
Juan Hong, Min Tang, Qiaoqiao Wang, Nan Ma, Shaowen Zhu, Shaobin Zhang, Xihao Pan, Linhong Xie, Guo Li, Uwe Kuhn, Chao Yan, Jiangchuan Tao, Ye Kuang, Yao He, Wanyun Xu, Runlong Cai, Yaqing Zhou, Zhibin Wang, Guangsheng Zhou, Bin Yuan, Yafang Cheng, and Hang Su
Atmos. Chem. Phys., 23, 5699–5713, https://doi.org/10.5194/acp-23-5699-2023, https://doi.org/10.5194/acp-23-5699-2023, 2023
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A comprehensive investigation of the characteristics of new particle formation (NPF) events was conducted at a rural site on the North China Plain (NCP), China, during the wintertime of 2018 by covering the particle number size distribution down to sub–3 nm. Potential mechanisms for NPF under the current environment were explored, followed by a further discussion on the factors governing the occurrence of NPF at this rural site compared with other regions (e.g., urban areas) in the NCP region.
Xinyao Hu, Junying Sun, Can Xia, Xiaojing Shen, Yangmei Zhang, Quan Liu, Zhaodong Liu, Sinan Zhang, Jialing Wang, Aoyuan Yu, Jiayuan Lu, Shuo Liu, and Xiaoye Zhang
Atmos. Chem. Phys., 23, 5517–5531, https://doi.org/10.5194/acp-23-5517-2023, https://doi.org/10.5194/acp-23-5517-2023, 2023
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The simultaneous measurements under dry conditions of aerosol optical properties were conducted at three wavelengths for PM1 and PM10 in urban Beijing from 2018 to 2021. Considerable reductions in aerosol absorption coefficient and increased single scattering albedo demonstrated that absorbing aerosols were more effectively controlled than scattering aerosols due to pollution control measures. The aerosol radiative effect and the transport's impact on aerosol optical properties were analysed.
Martin de Graaf, Karolina Sarna, Jessica Brown, Elma V. Tenner, Manon Schenkels, and David P. Donovan
Atmos. Chem. Phys., 23, 5373–5391, https://doi.org/10.5194/acp-23-5373-2023, https://doi.org/10.5194/acp-23-5373-2023, 2023
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Clouds over the oceans reflect sunlight and cool the earth. Simultaneous measurements were performed of cloud droplet sizes and smoke particles in and near the cloud base over Ascension Island, a remote island in the Atlantic Ocean, to determine the sensitivity of cloud droplets to smoke from the African continent. The smoke was found to reduce cloud droplet sizes, which makes the cloud droplets more susceptible to evaporation, reducing cloud lifetime.
Dominic Heslin-Rees, Peter Tunved, Johan Ström, Roxana Cremer, Paul Zieger, Ilona Riipinen, Annica Ekman, Konstantinos Eleftheriadis, and Radovan Krejci
EGUsphere, https://doi.org/10.5194/egusphere-2023-940, https://doi.org/10.5194/egusphere-2023-940, 2023
Short summary
Short summary
Light-absorbing atmospheric particles (e.g. black carbon (BC)) exert a warming effect on the Arctic climate. We show that the amount of particle light absorption decreased from 2002 to 2022. We conclude that in addition to reductions in emissions of BC, wet removal plays a role in the long-term reduction of BC in the Arctic, given the increase in surface precipitation experienced by air masses arriving at the site. The potential impact of biomass-burning events is shown to have increased.
Madeleine Petersson Sjögren, Malin Alsved, Tina Šantl-Temkiv, Thomas Bjerring Kristensen, and Jakob Löndahl
Atmos. Chem. Phys., 23, 4977–4992, https://doi.org/10.5194/acp-23-4977-2023, https://doi.org/10.5194/acp-23-4977-2023, 2023
Short summary
Short summary
Biological aerosol particles (bioaerosols) affect human health by spreading diseases and may be important agents for atmospheric processes, but their abundance and size distributions are largely unknown. We measured bioaerosols for 18 months in the south of Sweden to investigate bioaerosol temporal variations and their couplings to meteorology. Our results showed that the bioaerosols emissions were coupled to meteorological parameters and depended strongly on the season.
Andreas Massling, Robert Lange, Jakob Boyd Pernov, Ulrich Gosewinkel, Lise-Lotte Sørensen, and Henrik Skov
Atmos. Chem. Phys., 23, 4931–4953, https://doi.org/10.5194/acp-23-4931-2023, https://doi.org/10.5194/acp-23-4931-2023, 2023
Short summary
Short summary
The effect of anthropogenic activities on cloud formation introduces the highest uncertainties with respect to climate change. Data on Arctic aerosols and their corresponding cloud-forming properties are very scarce and most important as the Arctic is warming about 2 times as fast as the rest of the globe. Our studies investigate aerosols in the remote Arctic and suggest relatively high cloud-forming potential, although differences are observed between the Arctic spring and summer.
Cited articles
Albrecht, B. A.: Aerosols, cloud microphysics, and fractional cloudiness, Science, 245,
1227–1230, 1989.
Andreae, M. O.: Correlation between cloud condensation nuclei concentration and aerosol
optical thickness in remote and polluted regions, Atmos. Chem. Phys., 9, 543–556,
https://doi.org/10.5194/acp-9-543-2009, 2009.
Andreae, M. O. and Rosenfeld, D.: Aerosol–cloud–precipitation interactions. Part
1. The nature and sources of cloud-active aerosols, Earth-Sci. Rev., 89, 13–41, 2008.
Anil Kumar, V., Pandithurai, G., Leena, P. P., Dani, K. K., Murugavel, P., Sonbawne,
S. M., Patil, R. D., and Maheskumar, R. S.: Investigation of aerosol indirect effects on monsoon
clouds using ground-based measurements over a high-altitude site in Western Ghats,
Atmos. Chem. Phys., 16, 8423–8430, https://doi.org/10.5194/acp-16-8423-2016, 2016.
Arnott, W. P., Hamasha, K., Moosmüller, H., Sheridan, P. J., and Ogren, J. A.:
Towards aerosol light-absorption measurements with a 7-wavelength aethalometer: Evaluation with a
photoacoustic instrument and 3-wavelength nephelometer, Aerosol Sci. Technol., 39, 17–29, 2005.
Asa-Awuku, A., Moore, R. H., Nenes, A., Bahreini, R., Holloway, J. S., Brock, C. A.,
Middlebrook, A. M., Ryerson, T., Jimenez, J., DeCarlo, P., Hecobian, A., Weber, R., Stickel, R.,
Tanner, D. J., and Huey, L. G.: Airborne cloud condensation nuclei measurements during the 2006
Texas Air Quality Study, J. Geophys. Res., 116, D11201, https://doi.org/10.1029/2010JD014874, 2011.
Asmi, E., Freney, E., Hervo, M., Picard, D., Rose, C., Colomb, A., and Sellegri, K.:
Aerosol cloud activation in summer and winter at puy-de-Dôme high altitude site in France,
Atmos. Chem. Phys., 12, 11589–11607, https://doi.org/10.5194/acp-12-11589-2012, 2012.
Babu, S. S. and Moorthy, K. K.: Aerosol black carbon over a tropical coastal station in
India, Geophys. Res. Lett., 29, 2098, https://doi.org/10.1029/2002GL015662, 2002.
Babu, S. S., Manoj, M. R., Moorthy, K. K., Gogoi, M. M., Nair, V. S., Kompalli, S. K.,
Satheesh, S. K., Niranjan, K., Ramagopal, K., Bhuyan, P. K., and Singh, D.: Trends in aerosol
optical depth over Indian region: Potential causes and impact indicators, J. Geophys. Res.-Atmos.,
118, 11794–11806, https://doi.org/10.1002/2013JD020507, 2013.
Babu, S. S., Kompalli, S. K., and Moorthy, K. K.: Aerosol number size distributions over
a coastal semi urban location: seasonal changes and ultrafine particle bursts, Sci. Total
Environ., 563, 351–365, 2016.
Bègue, N., Tulet, P., Pelon, J., Aouizerats, B., Berger, A., and Schwarzenboeck,
A.: Aerosol processing and CCN formation of an intense Saharan dust plume during the EUCAARI 2008
campaign, Atmos. Chem. Phys., 15, 3497–3516, https://doi.org/10.5194/acp-15-3497-2015, 2015.
Bera, S. and Prabha, T. V.: Parameterization of Entrainment Rate and Mass Flux in
Continental Cumulus Clouds: Inference From Large Eddy Simulation, J. Geophys. Res. Atmos., 124,
13127–13139, https://doi.org/10.1029/2018JD031078, 2019.
Bhattu, D. and Tripathi, S. N.: Inter-seasonal variability in size-resolved CCN
properties at Kanpur, India, Atmos. Environ., 85, 161–168, 2014.
Bhattu, D. and Tripathi, S. N.: CCN closure study: Effects of aerosol chemical
composition and mixing state, J. Geophys. Res.-Atmos., 120, 766–783, 2015.
Birmili, W., Wiedensohler, A., Heintzenberg, J., and Lehmann, K.: Atmospheric particle
number size distribution in central Europe: Statistical relations to air masses and meteorology,
J. Geophys. Res.-Atmos., 106, 32005–32018, 2001.
Broekhuizen, K., Chang, R. Y.-W., Leaitch, W. R., Li, S.-M., and Abbatt, J. P. D.:
Closure between measured and modeled cloud condensation nuclei (CCN) using size-resolved aerosol
compositions in downtown Toronto, Atmos. Chem. Phys., 6, 2513–2524,
https://doi.org/10.5194/acp-6-2513-2006, 2006.
Burkart, J., Steiner, G., Reischl, G., and Hitzenberger, R.: Longterm study of cloud
condensation nuclei (CCN) activation of the atmospheric aerosol in Vienna, Atmos. Environ., 45,
5751–5759, https://doi.org/10.1016/j.atmosenv.2011.07.022, 2011.
Chung, C. E., Kim, S.-W., Lee, M., Yoon, S.-C., and Lee, S.: Carbonaceous aerosol AAE
inferred from in-situ aerosol measurements at the Gosan ABC super site, and the implications for
brown carbon aerosol, Atmos. Chem. Phys., 12, 6173–6184, https://doi.org/10.5194/acp-12-6173-2012, 2012.
Cohard, J.-M., Pinty, J.-P., and Bedos, C.: Extending Twomey's analytical estimate of
nucleated cloud droplet concentrations from CCN spectra, J. Atmos. Sci., 55, 3348–3357, 1998.
Crosbie, E., Youn, J.-S., Balch, B., Wonaschütz, A., Shingler, T., Wang, Z.,
Conant, W. C., Betterton, E. A., and Sorooshian, A.: On the competition among aerosol number, size
and composition in predicting CCN variability: a multi-annual field study in an urbanized desert,
Atmos. Chem. Phys., 15, 6943–6958, https://doi.org/10.5194/acp-15-6943-2015, 2015.
Cubison, M. J., Ervens, B., Feingold, G., Docherty, K. S., Ulbrich, I. M., Shields, L.,
Prather, K., Hering, S., and Jimenez, J. L.: The influence of chemical composition and mixing
state of Los Angeles urban aerosol on CCN number and cloud properties, Atmos. Chem. Phys., 8,
5649–5667, https://doi.org/10.5194/acp-8-5649-2008, 2008.
Deng, Z. Z., Zhao, C. S., Ma, N., Liu, P. F., Ran, L., Xu, W. Y., Chen, J., Liang, Z.,
Liang, S., Huang, M. Y., Ma, X. C., Zhang, Q., Quan, J. N., Yan, P., Henning, S., Mildenberger,
K., Sommerhage, E., Schäfer, M., Stratmann, F., and Wiedensohler, A.: Size-resolved and bulk
activation properties of aerosols in the North China Plain, Atmos. Chem. Phys., 11, 3835–3846,
https://doi.org/10.5194/acp-11-3835-2011, 2011.
Deng, Z. Z., Zhao, C. S., Ma, N., Ran, L., Zhou, G. Q., Lu, D. R., and Zhou, X. J.: An
examination of parameterizations for the CCN number concentration based on in situ measurements of
aerosol activation properties in the North China Plain, Atmos. Chem. Phys., 13, 6227–6237,
https://doi.org/10.5194/acp-13-6227-2013, 2013.
Draxler, R. R. and Rolph, G. D.: HYSPLIT (HYbrid single-particle Lagrangian Integrated
Trajectory) model via NOAA ARL READY, NOAA Air Resources Laboratory: Silver Spring, MD, available
at: http://www.arl.noaa.gov/ready/hysplit4.html (last access: 2 June 2019), 2014.
Drinovec, L., Močnik, G., Zotter, P., Prévôt, A. S. H., Ruckstuhl, C., Coz,
E., Rupakheti, M., Sciare, J., Müller, T., Wiedensohler, A., and Hansen, A. D. A.: The
“dual-spot” Aethalometer: an improved measurement of aerosol black carbon with real-time loading
compensation, Atmos. Meas. Tech., 8, 1965–1979, https://doi.org/10.5194/amt-8-1965-2015, 2015.
Du, Z., Hu, M., Peng, J., Zhang, W., Zheng, J., Gu, F., Qin, Y., Yang, Y., Li, M., Wu,
Y., Shao, M., and Shuai, S.: Comparison of primary aerosol emission and secondary aerosol
formation from gasoline direct injection and port fuel injection vehicles, Atmos. Chem. Phys., 18,
9011–9023, https://doi.org/10.5194/acp-18-9011-2018, 2018.
Dumka, U. C., Bhattu, D., Tripathi, S. N., Kaskaoutis, D. G., and Madhavan, B. L.:
Seasonal inhomogeneity in cloud precursors over Gangetic Himalayan region during GVAX campaign,
Atmos. Res., 155, 158–175, 2015.
Dusek, U., Frank, G. P., Hildebrandt, L., Curtius, J., Schneider, J., Walter, S.,
Chand, D., Drewnick, F., Hings, S., Jung, D., Borrmann, S., and Andreae, M. O.: Size Matters More
Than Chemistry for Cloud-Nucleating Ability of Aerosol Particles, Science, 312, 1375–1378,
https://doi.org/10.1126/science.1125261, 2006.
Ervens, B., Feingold, G., and Kreidenweis, S. M.: Influence of water-soluble organic
carbon on cloud drop number concentration, J. Geophys. Res.-Atmos., 110, D18211,
https://doi.org/10.1029/2004JD005634, 2005.
Ervens, B., Cubison, M. J., Andrews, E., Feingold, G., Ogren, J. A., Jimenez, J. L.,
Quinn, P. K., Bates, T. S., Wang, J., Zhang, Q., Coe, H., Flynn, M., and Allan, J. D.: CCN
predictions using simplified assumptions of organic aerosol composition and mixing state: a
synthesis from six different locations, Atmos. Chem. Phys., 10, 4795–4807,
https://doi.org/10.5194/acp-10-4795-2010, 2010.
Fan, J., Rosenfeld, D., Zhang, Y., Giangrande, S. E., Li, Z., Machado, L. A.,
Martin, S. T., Yang, Y., Wang, J., Artaxo, P., and Barbosa, H. M.: Substantial convection and
precipitation enhancements by ultrafine aerosol particles, Science, 359, 411–418, 2018.
Fang, S., Han, Y., Chen, K., Lu, C., Yin, Y., Tan, H., Wang, J.: Parameterization and
comparative evaluation of the CCN number concentration on Mt. Huang, China, Atmos. Res., 181,
300–311, 2016.
Fountoukis, C. and Nenes, A.: Continued development of a cloud droplet formation
parameterization for global climate models, J. Geophys. Res., 110, D11212,
https://doi.org/10.1029/2004JD005591, 2005.
Furutani, H., Dall'osto, M., Roberts, G. C., and Prather, K. A.:Assessment of the
relative importance of atmospheric aging on CCN activity derived from field observations,
Atmos. Environ., 42, 3130–3142, 2008.
Gayatri, K., Patade, S., and Prabha, T. V.: Aerosol–Cloud interaction in deep
convective clouds over the Indian Peninsula using spectral (bin) microphysics, J. Atmos. Sci., 74,
3145–3166, 2017.
Gelencser, A., Hoffer, A., Kiss, G., Tombacz, E., Kurdi, R., and Bencze, L.: In-situ
formation of light-absorbing organic matter in cloud water, J. Atmos. Chem., 45, 25–33, 2003.
Gogoi, M. M., Babu, S. S., Jayachandran, V., Moorthy, K. K., Satheesh, S. K., Naja, M.,
and Kotamarthi, V. R.: Optical properties and CCN activity of aerosols in a high-altitude
Himalayan environment: Results from RAWEX-GVAX, J. Geophys. Res.-Atmos., 120, 2453–2469, 2015.
Grossman, R. L. and Durran, D. R.: Interaction of low-level flow with the western Ghat
Mountains and offshore convection in the summer monsoon, Mon. Weather Rev., 112, 652–672, 1984.
Gunthe, S. S., King, S. M., Rose, D., Chen, Q., Roldin, P., Farmer, D. K., Jimenez,
J. L., Artaxo, P., Andreae, M. O., Martin, S. T., and Pöschl, U.: Cloud condensation nuclei in
pristine tropical rainforest air of Amazonia: size-resolved measurements and modeling of
atmospheric aerosol composition and CCN activity, Atmos. Chem. Phys., 9, 7551–7575,
https://doi.org/10.5194/acp-9-7551-2009, 2009.
Gyawali, M., Arnott, W. P., Lewis, K., and Moosmüller, H.: In situ aerosol optics
in Reno, NV, USA during and after the summer 2008 California wildfires and the influence of
absorbing and non-absorbing organic coatings on spectral light absorption, Atmos. Chem. Phys., 9,
8007–8015, https://doi.org/10.5194/acp-9-8007-2009, 2009.
Hansen, A. D. A., Rosen, H., and Novakov, T.: The aethalometer – an instrument for the
real-time measurement of optical absorption by aerosol particles, Sci. Total Env. 36, 191–196,
1984.
Hegg, D. A., Ferek, R. J., Hobbs, P. V., and Radke, L. F.:. Dimethyl sulfide and cloud
condensation nucleus correlations in the northeast Pacific Ocean, J. Geophys. Res.-Atmos., 96,
13189–13191. 1991.
Hitzenberger, R., Giebl, H., Petzold, A., Gysel, M., Nyeki, S., Weingartner, E.,
Baltensperger, U., and Wilson, C. W.: Properties of jet engine combustion particles during the
PartEmis experiment. Hygroscopic growth at supersaturated conditions, Geophys. Res. Lett., 30,
1779, https://doi.org/10.1029/2003GL017294, 2003.
Hoppel, W. A., Dinger, J. E., and Ruskin, R. E.: Vertical profiles of CCN at various
geographical locations, J. Atmos. Sci., 30, 1410–1420, 1973.
Hudson, J. G. and Xie, Y.: Vertical distributions of cloud condensation nuclei spectra
over the summertime northeast Pacific and Atlantic Oceans, J. Geophys. Res.-Atmos., 104,
30219–30229, 1999.
IPCC: Climate Change 2013: The Physical Science Basis, in: Contribution of Working
Group I to the Fifth Assessment Report of the Intergovernmental Panel on Climate Change, Cambridge
University Press, Cambridge, UK and New York, NY, USA, 2013.
Jayachandran, V., Nair, V. S., and Babu, S. S.: CCN characteristics over a tropical
coastal station during south-west monsoon: observations and closure studies, Atmos. Environ., 164,
299–308, 2017.
Jayachandran, V., Nair, V. S., and Babu, S. S.: CCN activation properties at a tropical
hill station in Western Ghats during south-west summer monsoon: Vertical heterogeneity,
Atmos. Res., 214, 36–45, 2018.
Jayachandran, V. N., Suresh Babu, S. N., Vaishya, A., Gogoi, M. M., Nair, V. S.,
Satheesh, S. K., and Krishna Moorthy, K.: Altitude profiles of cloud condensation nuclei
characteristics across the Indo-Gangetic Plain prior to the onset of the Indian summer monsoon,
Atmos. Chem. Phys., 20, 561–576, https://doi.org/10.5194/acp-20-561-2020, 2020.
Jefferson, A.: Empirical estimates of CCN from aerosol optical properties at four
remote sites, Atmos. Chem. Phys., 10, 6855–6861, https://doi.org/10.5194/acp-10-6855-2010, 2010.
Jurányi, Z., Gysel, M., Weingartner, E., Bukowiecki, N., Kammermann, L. and
Baltensperger, U.: A 17 month climatology of the cloud condensation nuclei number concentration at
the high alpine site Jungfraujoch, J. Geophys. Res.-Atmos., 116, D10204, https://doi.org/10.1029/2010JD015199, 2011.
Kalivitis, N., Kerminen, V.-M., Kouvarakis, G., Stavroulas, I., Bougiatioti, A., Nenes,
A., Manninen, H. E., Petäjä, T., Kulmala, M., and Mihalopoulos, N.: Atmospheric new
particle formation as a source of CCN in the eastern Mediterranean marine boundary layer,
Atmos. Chem. Phys., 15, 9203–9215, https://doi.org/10.5194/acp-15-9203-2015, 2015.
Kammermann, L., Gysel, M., Weingartner, E., Herich, H., Cziczo, D. J., Holst, T.,
Svenningsson, B., Arneth, A., and Baltensperger, U.: Subarctic atmospheric aerosol composition:
3. Measured and modeled properties of cloud condensation nuclei, J. Geophys. Res.-Atmos., 115,
D04202, https://doi.org/10.1029/2009JD012447, 2010.
Kanawade, V. P., Shika, S., Pöhlker, C., Rose, D., Suman, M. N. S., Gadhavi, H.,
Kumar, A., Nagendra, S. S., Ravikrishna, R., Yu, H., and Sahu, L. K.: Infrequent occurrence of new
particle formation at a semi-rural location, Gadanki, in tropical Southern India, Atmos. Environ.,
94, 264–273, 2014.
Khvorostyanov, V. I. and Curry, J. A.: Aerosol size spectra and CCN activity spectra:
Reconciling the lognormal, algebraic, and power laws, J. Geophys. Res., 111, D12202,
https://doi.org/10.1029/2005JD006532, 2006
Kim, S., Shen, S., Sioutas, C., Zhu, Y., and Hinds, W. C.: Size distribution and
diurnal and seasonal trends of ultrafine particles in source and receptor sites of the Los Angeles
basin, J. Air Waste Manag. Assoc., 52, 297–307, 2002.
Kirchstetter, T. W., Novakov, T., and Hobbs, P. V.: Evidence that the spectral
dependence of light absorption by aerosols is affected by organic carbon, J. Geophys. Res.-Atmos.,
109, 208, https://doi.org/10.1029/2004JD004999, 2004.
Köhler, H.: The nucleus in and the growth of hygroscopic droplets, Trans. Faraday
Soc., 32, 1152–1161, 1936.
Kompalli, S. K., Babu, S. S., Moorthy, K. K., Manoj, M. R., Kumar, N. K.,
Shaeb, K. H. B., and Joshi, A. K.: Aerosol black carbon characteristics over Central India:
Temporal variation and its dependence on mixed layer height, Atmos. Res., 147, 27–37, 2014.
Kompalli, S. K., Suresh Babu, S. N., Satheesh, S. K., Krishna Moorthy, K., Das, T.,
Boopathy, R., Liu, D., Darbyshire, E., Allan, J. D., Brooks, J., Flynn, M. J., and Coe, H.:
Seasonal contrast in size distributions and mixing state of black carbon and its association with
PM1.0 chemical composition from the eastern coast of India, Atmos. Chem. Phys., 20,
3965–3985, https://doi.org/10.5194/acp-20-3965-2020, 2020.
Komppula, M., Lihavainen, H., Hyvärinen, A. P., Kerminen, V. M., Panwar, T. S.,
Sharma, V. P., and Viisanen, Y.: Physical properties of aerosol particles at a Himalayan
background site in India, J. Geophys. Res.-Atmos., 114, D12202, https://doi.org/10.1029/2008JD011007, 2009.
Konwar, M., Maheskumar, R. S., Kulkarni, J. R., Freud, E., Goswami, B. N., and
Rosenfeld, D.: Aerosol control on depth of warm rain in convective clouds,
J. Geophys. Res.-Atmos., 117, D13204, https://doi.org/10.1029/2012JD017585, 2012.
Kulkarni, J. R., Maheskumar, R. S., Morwal, S. B., Padmakumari, B., Konwar, M.,
Deshpande, C. G., Joshi, R. R., Bhalwankar, R. V., Pandithurai, G., Safai, P. D., and
Narkhedkar, S. G.: The cloud aerosol interactions and precipitation enhancement experiment
(CAIPEEX): overview and preliminary results, Curr. Sci., 102, 413–425, 2012.
Kumar, R., Barth, M. C., Pfister, G. G., Nair, V. S., Ghude, S. D., and Ojha, N.: What
controls the seasonal cycle of black carbon aerosols in India?, J. Geophys. Res.-Atmos., 120,
7788–7812, https://doi.org/10.1002/2015JD023298, 2015.
Kuwata, M., Kondo, Y., and Takegawa, N.: Critical condensed mass for activation of
black carbon as cloud condensation nuclei in Tokyo, J. Geophys. Res.-Atmos., 114,
D20202, https://doi.org/10.1029/2009JD012086, 2009.
Laaksonen, A., Korhonen, P., Kulmala, M., and Charlson, R. J.: Modification of the
Köhler equation to include soluble trace gases and slightly soluble substances,
J. Atmos. Sci., 55, 853–862, 1998.
Lammel, G. and Novakov, T.: Water nucleation properties of carbon black and diesel soot
particles, Atmos. Environ., 29, 813–823, 1995.
Lance, S., Medina, J., Smith, J. N., and Nenes, A.: Mapping the Operation of the DMT
Continuous Flow CCN Counter, Aeros. Sci. Tech., 40, 242–254, https://doi.org/10.1080/02786820500543290,
2006.
Lance, S., Nenes, A., Mazzoleni, C., Dubey, M. K., Gates, H., Varutbangkul, V.,
Rissman, T. A., Murphy, S. M., Sorooshian, A., Flagan, R. C., and Seinfeld, J. H.: Cloud
condensation nuclei activity, closure, and droplet growth kinetics of Houston aerosol during the
Gulf of Mexico Atmospheric Composition and Climate Study (GoMACCS), J. Geophys. Res.-Atmos., 114,
D00F15, https://doi.org/10.1029/2008JD011699, 2009.
Lathem, T. L. and Nenes, A.: Water vapor depletion in the DMT continuous-flow CCN
chamber: Effects on supersaturation and droplet growth, Aerosol Sci. Technol., 45, 604–615,
2011.
Leena, P. P., Pandithurai, G., Anilkumar, V., Murugavel, P., Sonbawne, S. M., and
Dani, K. K.: Seasonal variability in aerosol, CCN and their relationship observed at a high
altitude site in Western Ghats, Meteorol. Atmos. Phys., 128, 143–153, 2016.
Lelieveld, J., Klingmüller, K., Pozzer, A., Burnett, R. T., Haines, A., and
Ramanathan, V.: Effects of fossil fuel and total anthropogenic emission removal on public health
and climate, P. Natl. Acad. Sci. USA, 116, 7192–7197, https://doi.org/10.1073/pnas.1819989116, 2019.
Liu, D., Allan, J., Whitehead, J., Young, D., Flynn, M., Coe, H., McFiggans, G.,
Fleming, Z. L., and Bandy, B.: Ambient black carbon particle hygroscopic properties controlled by
mixing state and composition, Atmos. Chem. Phys., 13, 2015–2029, https://doi.org/10.5194/acp-13-2015-2013,
2013.
Lohmann, U. and Feichter, J.: Global indirect aerosol effects: a review,
Atmos. Chem. Phys., 5, 715–737, https://doi.org/10.5194/acp-5-715-2005, 2005.
Lohmann, U., Feichter, J., Penner, J. E., and Leaitch, W. R.: Indirect effect of
sulfate and carbonaceous aerosols: A mechanistic treatment, J. Geophys. Res., 105, 12193–12206,
2000.
Maheskumar, R. S., Narkhedkar, S. G., Morwal, S. B., Padmakumari, B., Kothawale, D. R.,
Joshi, R. R., Deshpande, C. G., Bhalwankar, R. V., and Kulkarni, J. R.: Mechanism of high rainfall
over the Indian west coast region during the monsoon season, Clim. Dynam., 43, 1513–1529, 2014.
Manoj, M. R., Satheesh, S. K., Moorthy, K. K., Gogoi, M. M., and Babu, S. S.:
Decreasing Trend in Black Carbon Aerosols Over the Indian Region, Geophys. Res. Lett., 46,
2903–2910, 2019.
McFiggans, G., Artaxo, P., Baltensperger, U., Coe, H., Facchini, M. C., Feingold, G.,
Fuzzi, S., Gysel, M., Laaksonen, A., Lohmann, U., Mentel, T. F., Murphy, D. M., O'Dowd, C. D.,
Snider, J. R., and Weingartner, E.: The effect of physical and chemical aerosol properties on warm
cloud droplet activation, Atmos. Chem. Phys., 6, 2593–2649, https://doi.org/10.5194/acp-6-2593-2006, 2006.
Mikhailov, E., Vlasenko, S., Martin, S. T., Koop, T., and Pöschl, U.: Amorphous and
crystalline aerosol particles interacting with water vapor: conceptual framework and experimental
evidence for restructuring, phase transitions and kinetic limitations, Atmos. Chem. Phys., 9,
9491–9522, https://doi.org/10.5194/acp-9-9491-2009, 2009.
Mircea, M., Facchini, M. C., Decesari, S., Fuzzi, S., and Charlson, R. J.: The
influence of the organic aerosol component on CCN supersaturation spectra for different aerosol
types, Tellus B, 54, 74–81, 2002.
Morawska, L., Jayaratne, E. R., Mengersen, K., Jamriska, M., and Thomas, S.:
Differences in airborne particle and gaseous concentrations in urban air between weekdays and
weekends, Atmos. Environ., 36, 4375–4383, 2002.
Moore, R. H., Karydis, V. A., Capps, S. L., Lathem, T. L., and Nenes, A.: Droplet
number uncertainties associated with CCN: an assessment using observations and a global model
adjoint, Atmos. Chem. Phys., 13, 4235–4251, https://doi.org/10.5194/acp-13-4235-2013, 2013.
Moorthy, K. K., Babu, S. S., Manoj, M. R., and Satheesh, S. K.: Buildup of aerosols
over the Indian Region, Geophys. Res. Lett., 40, 1011–1014, https://doi.org/10.1002/grl.50165, 2013.
Myhre, G., Samset, B. H., Schulz, M., Balkanski, Y., Bauer, S., Berntsen, T. K., Bian,
H., Bellouin, N., Chin, M., Diehl, T., Easter, R. C., Feichter, J., Ghan, S. J., Hauglustaine, D.,
Iversen, T., Kinne, S., Kirkevåg, A., Lamarque, J.-F., Lin, G., Liu, X., Lund, M. T., Luo, G.,
Ma, X., van Noije, T., Penner, J. E., Rasch, P. J., Ruiz, A., Seland, Ø., Skeie, R. B., Stier,
P., Takemura, T., Tsigaridis, K., Wang, P., Wang, Z., Xu, L., Yu, H., Yu, F., Yoon, J.-H., Zhang,
K., Zhang, H., and Zhou, C.: Radiative forcing of the direct aerosol effect from AeroCom Phase II
simulations, Atmos. Chem. Phys., 13, 1853–1877, https://doi.org/10.5194/acp-13-1853-2013, 2013.
Nair, V. S., Moorthy, K. K., Alappattu, D. P., Kunhikrishnan, P. K., George, S.,
Nair, P. R., Babu, S. S., Abish, B., Satheesh, S. K., Tripathi, S. N., and Niranjan, K.:
Wintertime aerosol characteristics over the Indo-Gangetic Plain (IGP): Impacts of local boundary
layer processes and long-range transport, J. Geophys. Res.-Atmos., 112, D13205, https://doi.org/10.1029/2006jd008099, 2007.
Nair, V. S., Jayachandran, V. N., Kompalli, S. K., Gogoi, M. M., and Babu, S. S.: Cloud
condensation nuclei properties of South Asian outflow over the northern Indian Ocean during
winter, Atmos. Chem. Phys., 20, 3135–3149, https://doi.org/10.5194/acp-20-3135-2020, 2020.
Nenes, A., Charlson, R. J., Facchini, M. C., Kulmala, M., Laaksonen, A., and Seinfeld,
J. H.: Can chemical effects on cloud droplet number rival the first indirect effect?,
Geophys. Res. Lett., 29, 1848, https://doi.org/10.1029/2002GL015295, 2002.
Noble, S. R. and Hudson, J. G.: Effects of Continental Clouds on Surface Aitken and
Accumulation Modes, J. Geophys. Res.-Atmos., 124, 5479–5502, https://doi.org/10.1029/2019JD030297, 2019.
Novakov, T. and Penner, J. E.: Large contribution of organic aerosols to
cloud-condensation-nuclei concentrations, Nature, 365, 823–826, 1993.
O'Dowd, C. D., Smith, M. H., Consterdine, I. E., and Lowe, J. A.: Marine aerosol,
sea-salt, and the marine sulphur cycle: A short review, Atmos. Environ., 31, 73–80, 1997.
Padmakumari, B., Maheskumar, R. S., Harikishan, G., Morwal, S. B., Prabha, T. V., and
Kulkarni, J. R.: In situ measurements of aerosol vertical and spatial distributions over
continental India during the major drought year 2009, Atmos. Environ., 80, 107–121, 2013.
Padmakumari, B., Maheskumar, R. S., Harikishan, G., Morwal, S. B., and Kulkarni, J. R.:
Rain-shadow: An area harboring “Gray Ocean” clouds, Atmos. Res., 205, 70–79, 2018.
Pandithurai, G., Dipu, S., Prabha, T. V., Maheskumar, R. S., Kulkarni, J. R., and
Goswami, B. N.: Aerosol effect on droplet spectral dispersion in warm continental cumuli,
J. Geophys. Res.-Atmos., 117, D16202, https://doi.org/10.1029/2011JD016532, 2012.
Paramonov, M., Aalto, P. P., Asmi, A., Prisle, N., Kerminen, V.-M., Kulmala, M., and
Petäjä, T.: The analysis of size-segregated cloud condensation nuclei counter (CCNC) data
and its implications for cloud droplet activation, Atmos. Chem. Phys., 13, 10285–10301,
https://doi.org/10.5194/acp-13-10285-2013, 2013.
Paramonov, M., Kerminen, V.-M., Gysel, M., Aalto, P. P., Andreae, M. O., Asmi, E.,
Baltensperger, U., Bougiatioti, A., Brus, D., Frank, G. P., Good, N., Gunthe, S. S., Hao, L.,
Irwin, M., Jaatinen, A., Jurányi, Z., King, S. M., Kortelainen, A., Kristensson, A.,
Lihavainen, H., Kulmala, M., Lohmann, U., Martin, S. T., McFiggans, G., Mihalopoulos, N., Nenes,
A., O'Dowd, C. D., Ovadnevaite, J., Petäjä, T., Pöschl, U., Roberts, G. C., Rose, D.,
Svenningsson, B., Swietlicki, E., Weingartner, E., Whitehead, J., Wiedensohler, A., Wittbom, C.,
and Sierau, B.: A synthesis of cloud condensation nuclei counter (CCNC) measurements within the
EUCAARI network, Atmos. Chem. Phys., 15, 12211–12229, https://doi.org/10.5194/acp-15-12211-2015, 2015.
Parthasarathy, B. and Yang, S.: Relationships between regional Indian summer monsoon
rainfall and Eurasian snow cover, Adv. Atmos. Sci., 12, 143–150, 1995.
Patade, S., Kulkarni, G., Patade, S., Deshmukh, A., Dangat, P., Axisa, D., Fan, J.,
Pradeepkumar, P., and Prabha, T. V.:. Role of liquid phase in the development of ice phase in
monsoon clouds: Aircraft observations and numerical simulations, Atmos. Res., 229, 157–174, 2019.
Patidar, V., Tripathi, S. N., Bharti, P. K., and Gupta, T.: First surface measurement
of cloud condensation nuclei over Kanpur, IGP: role of long range transport, Aerosol
Sci. Technol., 46, 973–982, 2012.
Pöhlker, C., Wiedemann, K. T., Sinha, B., Shiraiwa, M., Gunthe, S. S., Smith, M.,
Su, H., Artaxo, P., Chen, Q., Cheng, Y., and Elbert, W.: Biogenic potassium salt particles as
seeds for secondary organic aerosol in the Amazon, Science, 337, 1075–1078, 2012.
Pöhlker, M. L., Pöhlker, C., Ditas, F., Klimach, T., Hrabe de Angelis, I.,
Araújo, A., Brito, J., Carbone, S., Cheng, Y., Chi, X., Ditz, R., Gunthe, S. S., Kesselmeier,
J., Könemann, T., Lavrič, J. V., Martin, S. T., Mikhailov, E., Moran-Zuloaga, D., Rose,
D., Saturno, J., Su, H., Thalman, R., Walter, D., Wang, J., Wolff, S., Barbosa, H. M. J., Artaxo,
P., Andreae, M. O., and Pöschl, U.: Long-term observations of cloud condensation nuclei in the
Amazon rain forest – Part 1: Aerosol size distribution, hygroscopicity, and new model
parametrizations for CCN prediction, Atmos. Chem. Phys., 16, 15709–15740,
https://doi.org/10.5194/acp-16-15709-2016, 2016.
Pöhlker, M. L., Ditas, F., Saturno, J., Klimach, T., Hrabě de Angelis, I.,
Araùjo, A. C., Brito, J., Carbone, S., Cheng, Y., Chi, X., Ditz, R., Gunthe, S. S., Holanda,
B. A., Kandler, K., Kesselmeier, J., Könemann, T., Krüger, O. O., Lavrič, J. V., Martin,
S. T., Mikhailov, E., Moran-Zuloaga, D., Rizzo, L. V., Rose, D., Su, H., Thalman, R., Walter, D.,
Wang, J., Wolff, S., Barbosa, H. M. J., Artaxo, P., Andreae, M. O., Pöschl, U., and
Pöhlker, C.: Long-term observations of cloud condensation nuclei over the Amazon rain forest
– Part 2: Variability and characteristics of biomass burning, long-range transport, and pristine
rain forest aerosols, Atmos. Chem. Phys., 18, 10289–10331, https://doi.org/10.5194/acp-18-10289-2018, 2018.
Prabha, T. V., Khain, A., Maheshkumar, R. S., Pandithurai, G., Kulkarni, J. R.,
Konwar, M., and Goswami, B. N.:. Microphysics of premonsoon and monsoon clouds as seen from in
situ measurements during the Cloud Aerosol Interaction and Precipitation Enhancement Experiment
(CAIPEEX), J. Atmos. Sci., 68, 1882–1901, 2011.
Prabha, T. V., Patade, S., Pandithurai, G., Khain, A., Axisa, D., Pradeep-Kumar, P.,
Maheshkumar, R. S., Kulkarni, J. R., and Goswami, B. N.: Spectral width of premonsoon and monsoon
clouds over Indo-Gangetic valley, J. Geophys. Res.-Atmos., 117, D20205, https://doi.org/10.1029/2011JD016837, 2012.
Prakash, J. W. J., Ramachandran, R., Nair, K. N., Gupta, K. S., and
Kunhikrishnan, P. K.: On the structure of sea-breeze fronts observed near the coastline of Thumba,
India, Bound.-Layer Meteorol., 59, 111–124, 1992.
Quinn, P. K., Bates, T. S., Coffman, D. J., and Covert, D. S.: Influence of particle
size and chemistry on the cloud nucleating properties of aerosols, Atmos. Chem. Phys., 8,
1029–1042, https://doi.org/10.5194/acp-8-1029-2008, 2008.
Ramanathan, V., Crutzen, P. J., Lelieveld, J., Mitra, A. P., Althausen, D., Anderson,
J., Andreae, M. O., Cantrell, W., Cass, G. R., Chung, C. E., and Clarke, A. D.: Indian Ocean
Experiment: An integrated analysis of the climate forcing and effects of the great Indo-Asian
haze, J. Geophys. Res.-Atmos., 106, 28371–28398, 2001.
Raymond, T. M. and Pandis, S. N.: Formation of cloud droplets by multicomponent
organic particles, J. Geophys. Res., 108, 4469–4476, 2003.
Roberts, G. C. and Nenes, A.: A continuous-flow streamwise thermal-gradient CCN
chamber for atmospheric measurements, Aerosol Sci. Technol., 39, 206–221, 2005.
Rose, D., Gunthe, S. S., Mikhailov, E., Frank, G. P., Dusek, U., Andreae, M. O., and
Pöschl, U.: Calibration and measurement uncertainties of a continuous-flow cloud condensation
nuclei counter (DMT-CCNC): CCN activation of ammonium sulfate and sodium chloride aerosol
particles in theory and experiment, Atmos. Chem. Phys., 8, 1153–1179,
https://doi.org/10.5194/acp-8-1153-2008, 2008.
Rosenfeld, D., Lohmann, U., Raga, G. B., O'Dowd, C. D., Kulmala, M., Fuzzi, S.,
Reissell, A., and Andreae, M. O.: Flood or drought: how do aerosols affect precipitation?,
Science, 321, 1309–1313, 2008.
Roy, A., Chatterjee, A., Sarkar, C., Das, S. K., Ghosh, S. K., and Raha, S.: A study
on aerosol-cloud condensation nuclei (CCN) activation over eastern Himalaya in India, Atmos. Res.,
189, 69–81, 2017.
Safai, P., Kewat, S., Praveen, P., Rao, P., Momin, G., Ali, K., and Devara, P.:
Seasonal variation of black carbon aerosols over a tropical urbanbcity of Pune, India,
Atmos. Environ., 41, 2699–2709, https://doi.org/10.1016/j.atmosenv.2006.11.044, 2007.
Safai, P. D., Raju, M. P., Budhavant, K. B., Rao, P. S. P., and Devara, P. C. S.: Long
term studies on characteristics of black carbon aerosols over a tropical urban station Pune,
India, Atmos. Res., 132, 173–184, 2013.
Sandeep, A., Narayana Rao, T., Ramkiran, C. N., and Rao, S. V. B.: Differences in
atmospheric boundary-layer characteristics between wet and dry episodes of the Indian summer
monsoon, Bound.-Layer Meteorol., 153, 217–236, 2014.
Schmale, J., Henning, S., Decesari, S., Henzing, B., Keskinen, H., Sellegri, K.,
Ovadnevaite, J., Pöhlker, M. L., Brito, J., Bougiatioti, A., Kristensson, A., Kalivitis, N.,
Stavroulas, I., Carbone, S., Jefferson, A., Park, M., Schlag, P., Iwamoto, Y., Aalto, P.,
Äijälä, M., Bukowiecki, N., Ehn, M., Frank, G., Fröhlich, R., Frumau, A.,
Herrmann, E., Herrmann, H., Holzinger, R., Kos, G., Kulmala, M., Mihalopoulos, N., Nenes, A.,
O'Dowd, C., Petäjä, T., Picard, D., Pöhlker, C., Pöschl, U., Poulain, L.,
Prévôt, A. S. H., Swietlicki, E., Andreae, M. O., Artaxo, P., Wiedensohler, A., Ogren, J.,
Matsuki, A., Yum, S. S., Stratmann, F., Baltensperger, U., and Gysel, M.: Long-term cloud
condensation nuclei number concentration, particle number size distribution and chemical
composition measurements at regionally representative observatories, Atmos. Chem. Phys., 18,
2853–2881, https://doi.org/10.5194/acp-18-2853-2018, 2018.
Seinfeld, J. H. and Pandis, S. N.: Atmospheric chemistry and physics: from air
pollution to climate change, John Wiley & Sons, New York,
2016.
Shulman, M. L., Jacobson, M. C., Carlson, R. J., Synovec, R. E., and Young, T. E.:
Dissolution behavior and surface tension effects of organic compounds in nucleating cloud
droplets, Geophys. Res. Lett., 23, 277–280, 1996.
Sijikumar, S., John, L., and Manjusha, K.: Sensitivity study on the role of Western
Ghats in simulating the Asian summer monsoon characteristics, Meteorol. Atmos. Phys., 120, 53–60,
2013.
Singla, V., Mukherjee, S., Safai, P., Meena, G., Dani, K., and Pandithurai, G.: Role
of organic aerosols in CCN activation and closure over a rural background site in Western Ghats,
India, Atmos. Environ., 158, 148–159, 2017.
Sotiropoulou, R.-E. P., Nenes, A., Adams, P. J., and Seinfeld, J. H.: Cloud
condensation nuclei prediction error from application of Kohler theory: Importance for the aerosol
indirect effect, J. Geophys. Res., 112, D12202, https://doi.org/10.1029/2006JD007834, 2007.
Spracklen, D. V., Carslaw, K. S., Pöschl, U., Rap, A., and Forster, P. M.: Global
cloud condensation nuclei influenced by carbonaceous combustion aerosol, Atmos. Chem. Phys., 11,
9067–9087, https://doi.org/10.5194/acp-11-9067-2011, 2011.
Twomey, S.: The nuclei of natural cloud formation part II: The supersaturation in
natural clouds and the variation of cloud droplet concentration, Geofis. Pura Appl., 43, 243–249,
1959.
Twomey, S. A.: The influence of pollution on the shortwave albedo of clouds,
J. Atmos. Sci., 34, 1149–1152, 1977.
Twomey, S. and Warner, J.: Comparison of measurements of cloud droplets and cloud
nuclei, J. Atmos. Sci., 24, 702–703, 1967.
Udayasoorian, C., Jayabalakrishnan, R. M., Suguna, A. R., Gogoi, M. M., and Suresh
Babu, S.: Aerosol black carbon characteristics over a high-altitude Western Ghats location in
Southern India, Ann. Geophys., 32, 1361–1371, https://doi.org/10.5194/angeo-32-1361-2014, 2014.
Ueda, S., Miura, K., Kawata, R., Furutani, H., Uematsu, M., Omori, Y., and Tanimoto,
H.: Number-size distribution of aerosol particles and new particle formation events in tropical
and subtropical Pacific Oceans, Atmos. Environ., 142, 324–339, 2016.
Vaishya, A., Singh, P., Rastogi, S., and Babu, S. S.: Aerosol black carbon
quantification in the central Indo-Gangetic Plain: Seasonal heterogeneity and source
apportionment, Atmos. Res., 185, 13–21, 2017.
Varghese, M., Prabha, T. V., Malap, N., Resmi, E. A., Murugavel, P., Safai, P. D.,
Axisa, D., Pandithurai, G., and Dani, K.: Airborne and ground based CCN spectral characteristics:
Inferences from CAIPEEX–2011, Atmos. Environ., 125, 324–336, 2016.
Varghese, M., Prabha, T. V., Murugavel, P., Anu, A. S., Resmi, E. A., Dinesh, G.,
Rao, Y. J., Nagare, B., Safai, P. D., Nair, S., and Nandakumar, K.: Aerosol and cloud droplet
characteristics over Ganges Valley during break phase of monsoon: A case study, Atmos. Res., 220,
125–140, 2019.
Wang, S. C. and Flagan, R. C.: Scanning electrical mobility spectrometer, Aerosol
Sci. Technol. 13, 2230–2240, https://doi.org/10.1080/02786829008959441, 1990.
Wehner, B. and Wiedensohler, A.: Long term measurements of submicrometer urban
aerosols: statistical analysis for correlations with meteorological conditions and trace gases,
Atmos. Chem. Phys., 3, 867–879, https://doi.org/10.5194/acp-3-867-2003, 2003.
Weingartner, E., Saathoff, H., Schnaiter, M., Streit, N., Bitnar, B., and
Baltensperger, U.: Absorption of light by soot particles: determination of the absorption
coefficient by means of aethalometers, J. Aerosol Sci., 34, 1445–1463, 2003.
Wiedensohler, A.: An approximation of the bipolar charge distribution for particles in
the submicron size range, J. Aerosol Sci., 19, 387–389, 1988.
Willis, M. D., Burkart, J., Thomas, J. L., Köllner, F., Schneider, J., Bozem, H.,
Hoor, P. M., Aliabadi, A. A., Schulz, H., Herber, A. B., Leaitch, W. R., and Abbatt, J. P. D.:
Growth of nucleation mode particles in the summertime Arctic: a case study, Atmos. Chem. Phys.,
16, 7663–7679, https://doi.org/10.5194/acp-16-7663-2016, 2016.
Short summary
Continuous aerosol and cloud condensation nuclei (CCN) measurements carried out at the ground observational facility of a CAIPEEX campaign, situated in the rain-shadow region of the Indian subcontinent, are illustrated. The variations in CCN characteristics within the monsoon period are investigated along with the aerosol physical and optical properties. The change in the dependency of CCN activity on aerosol size and composition due to the variations in air mass and meteorology is brought out.
Continuous aerosol and cloud condensation nuclei (CCN) measurements carried out at the ground...
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