Articles | Volume 16, issue 18
https://doi.org/10.5194/acp-16-11991-2016
© Author(s) 2016. This work is distributed under
the Creative Commons Attribution 3.0 License.
the Creative Commons Attribution 3.0 License.
https://doi.org/10.5194/acp-16-11991-2016
© Author(s) 2016. This work is distributed under
the Creative Commons Attribution 3.0 License.
the Creative Commons Attribution 3.0 License.
Research article
| 
26 Sep 2016
Research article |
| 26 Sep 2016
Arabian Red Sea coastal soils as potential mineral dust sources
P. Jish Prakash
CORRESPONDING AUTHOR
King Abdullah University of Science and Technology (KAUST), Physical
Science and Engineering Division (PSE), Thuwal, 23955-6900, Saudi Arabia
Georgiy Stenchikov
King Abdullah University of Science and Technology (KAUST), Physical
Science and Engineering Division (PSE), Thuwal, 23955-6900, Saudi Arabia
Weichun Tao
King Abdullah University of Science and Technology (KAUST), Physical
Science and Engineering Division (PSE), Thuwal, 23955-6900, Saudi Arabia
Tahir Yapici
King Abdullah University of Science and Technology (KAUST), Physical
Science and Engineering Division (PSE), Thuwal, 23955-6900, Saudi Arabia
Bashir Warsama
King Abdullah University of Science and Technology (KAUST), Physical
Science and Engineering Division (PSE), Thuwal, 23955-6900, Saudi Arabia
Johann P. Engelbrecht
King Abdullah University of Science and Technology (KAUST), Physical
Science and Engineering Division (PSE), Thuwal, 23955-6900, Saudi Arabia
Desert Research Institute (DRI), Reno, Nevada 89512-1095, USA
Related authors
Johann P. Engelbrecht, Georgiy Stenchikov, P. Jish Prakash, Traci Lersch, Anatolii Anisimov, and Illia Shevchenko
Atmos. Chem. Phys., 17, 11467–11490, https://doi.org/10.5194/acp-17-11467-2017, https://doi.org/10.5194/acp-17-11467-2017, 2017
Short summary
Short summary
Desert dust has a profound impact on peoples health, visibility, damage to equipment, and global climate. This research is on dust from the Arabian Peninsula and aims at collecting and analyzing mineralogical, physical, and chemical composition of dust deposits from the atmosphere at the KAUST campus along the Red Sea in Saudi Arabia. The results will be used to assess the input of nutrients to the Red Sea, and will support dust modeling in the Middle East.
Anatolii Anisimov, Weichun Tao, Georgiy Stenchikov, Stoitchko Kalenderski, P. Jish Prakash, Zong-Liang Yang, and Mingjie Shi
Atmos. Chem. Phys., 17, 993–1015, https://doi.org/10.5194/acp-17-993-2017, https://doi.org/10.5194/acp-17-993-2017, 2017
Short summary
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This study is aimed at quantifying the fine-scale structure of dust emission from the western coastal plain of the Arabian Peninsula. Using the high-resolution modeling tools and up-to-date satellite inventories, we simulate and analyze the spatial and temporal variability of dust generation. The estimate of total dust emission from the coastal plain is 7.5 ± 0.5 Mt per year. We show that the study area is a stable dust generation zone and a potential source of mineral nutrients for the Red Sea.
Ewa M. Bednarz, Amy H. Butler, Xinyue Wang, Zhihong Zhuo, Wandi Yu, Georgiy Stenchikov, Matthew Toohey, and Yunqian Zhu
EGUsphere, https://doi.org/10.5194/egusphere-2025-1970, https://doi.org/10.5194/egusphere-2025-1970, 2025
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Injection of sulfur and water vapour by the Hunga volcanic eruption significantly altered chemical composition and radiative budget of the stratosphere. Yet, whether the eruption could also affect surface climate, especially via indirect pathways, remains poorly understood. Here we investigate these effects using large ensembles of simulations with the CESM2(WACCM6) Earth system model.
Natalie M. Mahowald, Longlei Li, Julius Vira, Marje Prank, Douglas S. Hamilton, Hitoshi Matsui, Ron L. Miller, P. Louis Lu, Ezgi Akyuz, Daphne Meidan, Peter Hess, Heikki Lihavainen, Christine Wiedinmyer, Jenny Hand, Maria Grazia Alaimo, Célia Alves, Andres Alastuey, Paulo Artaxo, Africa Barreto, Francisco Barraza, Silvia Becagli, Giulia Calzolai, Shankararaman Chellam, Ying Chen, Patrick Chuang, David D. Cohen, Cristina Colombi, Evangelia Diapouli, Gaetano Dongarra, Konstantinos Eleftheriadis, Johann Engelbrecht, Corinne Galy-Lacaux, Cassandra Gaston, Dario Gomez, Yenny González Ramos, Roy M. Harrison, Chris Heyes, Barak Herut, Philip Hopke, Christoph Hüglin, Maria Kanakidou, Zsofia Kertesz, Zbigniew Klimont, Katriina Kyllönen, Fabrice Lambert, Xiaohong Liu, Remi Losno, Franco Lucarelli, Willy Maenhaut, Beatrice Marticorena, Randall V. Martin, Nikolaos Mihalopoulos, Yasser Morera-Gómez, Adina Paytan, Joseph Prospero, Sergio Rodríguez, Patricia Smichowski, Daniela Varrica, Brenna Walsh, Crystal L. Weagle, and Xi Zhao
Atmos. Chem. Phys., 25, 4665–4702, https://doi.org/10.5194/acp-25-4665-2025, https://doi.org/10.5194/acp-25-4665-2025, 2025
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Aerosol particles are an important part of the Earth system, but their concentrations are spatially and temporally heterogeneous, as well as being variable in size and composition. Here, we present a new compilation of PM2.5 and PM10 aerosol observations, focusing on the spatial variability across different observational stations, including composition, and demonstrate a method for comparing the data sets to model output.
Zhihong Zhuo, Xinyue Wang, Yunqian Zhu, Ewa M. Bednarz, Eric Fleming, Peter R. Colarco, Shingo Watanabe, David Plummer, Georgiy Stenchikov, William Randel, Adam Bourassa, Valentina Aquila, Takashi Sekiya, Mark R. Schoeberl, Simone Tilmes, Wandi Yu, Jun Zhang, Paul J. Kushner, and Francesco S. R. Pausata
EGUsphere, https://doi.org/10.5194/egusphere-2025-1505, https://doi.org/10.5194/egusphere-2025-1505, 2025
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The 2022 Hunga eruption caused unprecedented stratospheric water injection, triggering unique atmospheric impacts. This study combines observations and model simulations, projecting a stratospheric water vapor anomaly lasting 4–7 years, with significant temperature variations and ozone depletion in the upper atmosphere lasting 7–10 years. These findings offer critical insights into the role of stratospheric water vapor in shaping climate and atmospheric chemistry.
Anton Lopatin, Oleg Dubovik, Georgiy Stenchikov, Ellsworth J. Welton, Illia Shevchenko, David Fuertes, Marcos Herreras-Giralda, Tatsiana Lapyonok, and Alexander Smirnov
Atmos. Meas. Tech., 17, 4445–4470, https://doi.org/10.5194/amt-17-4445-2024, https://doi.org/10.5194/amt-17-4445-2024, 2024
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We compare aerosol properties over the King Abdullah University of Science and Technology campus using Generalized Retrieval of Aerosol and Surface Properties (GRASP) and the Micro-Pulse Lidar Network (MPLNET). We focus on the impact of different aerosol retrieval assumptions on daytime and nighttime retrievals and analyze seasonal variability in aerosol properties, aiding in understanding aerosol behavior and improving retrieval. Our work has implications for climate and public health.
Mohamed Abdelkader, Georgiy Stenchikov, Andrea Pozzer, Holger Tost, and Jos Lelieveld
Atmos. Chem. Phys., 23, 471–500, https://doi.org/10.5194/acp-23-471-2023, https://doi.org/10.5194/acp-23-471-2023, 2023
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We study the effect of injected volcanic ash, water vapor, and SO2 on the development of the volcanic cloud and the stratospheric aerosol optical depth (AOD). Both are sensitive to the initial injection height and to the aging of the volcanic ash shaped by heterogeneous chemistry coupled with the ozone cycle. The paper explains the large differences in AOD for different injection scenarios, which could improve the estimate of the radiative forcing of volcanic eruptions.
Sagar P. Parajuli, Georgiy L. Stenchikov, Alexander Ukhov, Suleiman Mostamandi, Paul A. Kucera, Duncan Axisa, William I. Gustafson Jr., and Yannian Zhu
Atmos. Chem. Phys., 22, 8659–8682, https://doi.org/10.5194/acp-22-8659-2022, https://doi.org/10.5194/acp-22-8659-2022, 2022
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Rainfall affects the distribution of surface- and groundwater resources, which are constantly declining over the Middle East and North Africa (MENA) due to overexploitation. Here, we explored the effects of dust on rainfall using WRF-Chem model simulations. Although dust is considered a nuisance from an air quality perspective, our results highlight the positive fundamental role of dust particles in modulating rainfall formation and distribution, which has implications for cloud seeding.
Anton Lopatin, Oleg Dubovik, David Fuertes, Georgiy Stenchikov, Tatyana Lapyonok, Igor Veselovskii, Frank G. Wienhold, Illia Shevchenko, Qiaoyun Hu, and Sagar Parajuli
Atmos. Meas. Tech., 14, 2575–2614, https://doi.org/10.5194/amt-14-2575-2021, https://doi.org/10.5194/amt-14-2575-2021, 2021
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The article presents novelties in characterizing fine particles suspended in the air by means of combining various measurements that observe light propagation in atmosphere. Several non-coincident observations (some of which require sunlight, while others work only at night) could be united under the assumption that aerosol properties do not change drastically at nighttime. It also proposes how to describe particles' composition in a simplified manner that uses new types of observations.
Alexander Ukhov, Ravan Ahmadov, Georg Grell, and Georgiy Stenchikov
Geosci. Model Dev., 14, 473–493, https://doi.org/10.5194/gmd-14-473-2021, https://doi.org/10.5194/gmd-14-473-2021, 2021
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We discuss and evaluate the effects of inconsistencies found in the WRF-Chem code when using the GOCART module. First, PM surface concentrations were miscalculated. Second, dust optical depth was underestimated by 25 %–30 %. Third, an inconsistency in the process of gravitational settling led to the overestimation of dust column loadings by 4 %–6 %, PM10 by 2 %–4 %, and the rate of gravitational dust settling by 5 %–10 %. We also presented diagnostics that can be used to estimate these effects.
Sagar P. Parajuli, Georgiy L. Stenchikov, Alexander Ukhov, Illia Shevchenko, Oleg Dubovik, and Anton Lopatin
Atmos. Chem. Phys., 20, 16089–16116, https://doi.org/10.5194/acp-20-16089-2020, https://doi.org/10.5194/acp-20-16089-2020, 2020
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Both natural (dust, sea salt) and anthropogenic (sulfate, organic and black carbon) aerosols are common over the Red Sea coastal plains. King Abdullah University of Science and Technology (KAUST), located on the eastern coast of the Red Sea, hosts the only operating lidar system in the Arabian Peninsula, which measures atmospheric aerosols day and night. We use these lidar data and high-resolution WRF-Chem model simulations to study the potential effect of dust aerosols on Red Sea environment.
Klaus Klingmüller, Vlassis A. Karydis, Sara Bacer, Georgiy L. Stenchikov, and Jos Lelieveld
Atmos. Chem. Phys., 20, 15285–15295, https://doi.org/10.5194/acp-20-15285-2020, https://doi.org/10.5194/acp-20-15285-2020, 2020
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Particulate air pollution cools the climate and partially masks the greenhouse warming by reflecting sunlight and enhancing the reflection by clouds. The intensity of this cooling depends on interactions between pollution and desert dust within the atmosphere. Our simulations with a global atmospheric chemistry-climate model indicate that these interactions significantly weaken the cooling.
Alexander Ukhov, Suleiman Mostamandi, Arlindo da Silva, Johannes Flemming, Yasser Alshehri, Illia Shevchenko, and Georgiy Stenchikov
Atmos. Chem. Phys., 20, 9281–9310, https://doi.org/10.5194/acp-20-9281-2020, https://doi.org/10.5194/acp-20-9281-2020, 2020
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The data assimilation products MERRA2 and CAMS are tested over the Middle East (ME) against in situ and satellite observations. For the first time, we compared the new MODIS aerosol optical depth (AOD) retrieval, MAIAC, with the Deep Blue and Dark Target MODIS AOD. We conducted 2-year high-resolution WRF-Chem simulations with the most accurate OMI-HTAP SO2 emissions to estimate the contribution of natural and anthropogenic aerosols to the PM pollution in the ME.
Klaus Klingmüller, Jos Lelieveld, Vlassis A. Karydis, and Georgiy L. Stenchikov
Atmos. Chem. Phys., 19, 7397–7408, https://doi.org/10.5194/acp-19-7397-2019, https://doi.org/10.5194/acp-19-7397-2019, 2019
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Within the atmosphere, desert dust and anthropogenic pollution are mixed and interact, which affects the abundance and optical properties of the particulate matter. This results in an anthropogenic climate forcing associated with mineral dust notwithstanding the natural origin of most aeolian dust. With a global chemistry–climate model, we estimate this forcing to represent a considerable fraction of the total dust forcing.
Klaus Klingmüller, Swen Metzger, Mohamed Abdelkader, Vlassis A. Karydis, Georgiy L. Stenchikov, Andrea Pozzer, and Jos Lelieveld
Geosci. Model Dev., 11, 989–1008, https://doi.org/10.5194/gmd-11-989-2018, https://doi.org/10.5194/gmd-11-989-2018, 2018
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More than 1 billion tons of mineral dust particles are raised into the atmosphere every year, which has a significant impact on climate, society and ecosystems. The location, time and amount of dust emissions depend on surface and wind conditions. In the atmospheric chemistry–climate model EMAC, we have updated the relevant surface data and equations. Our validation shows that the updates substantially improve the agreement of model results and observations.
Johann P. Engelbrecht, Georgiy Stenchikov, P. Jish Prakash, Traci Lersch, Anatolii Anisimov, and Illia Shevchenko
Atmos. Chem. Phys., 17, 11467–11490, https://doi.org/10.5194/acp-17-11467-2017, https://doi.org/10.5194/acp-17-11467-2017, 2017
Short summary
Short summary
Desert dust has a profound impact on peoples health, visibility, damage to equipment, and global climate. This research is on dust from the Arabian Peninsula and aims at collecting and analyzing mineralogical, physical, and chemical composition of dust deposits from the atmosphere at the KAUST campus along the Red Sea in Saudi Arabia. The results will be used to assess the input of nutrients to the Red Sea, and will support dust modeling in the Middle East.
Jamie R. Banks, Helen E. Brindley, Georgiy Stenchikov, and Kerstin Schepanski
Atmos. Chem. Phys., 17, 3987–4003, https://doi.org/10.5194/acp-17-3987-2017, https://doi.org/10.5194/acp-17-3987-2017, 2017
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From an 11-year analysis of satellite measurements of atmospheric dust presence over the Red Sea, it is clear that there is a strong north–south gradient in dust activity and a pronounced interannual variability in this activity. Analysing two commonly used satellite retrieval methods to quantify dust presence, we find that under the most extreme dust storm conditions the measured dust optical thicknesses can diverge strongly between the two methods.
Mohamed Abdelkader, Swen Metzger, Benedikt Steil, Klaus Klingmüller, Holger Tost, Andrea Pozzer, Georgiy Stenchikov, Leonard Barrie, and Jos Lelieveld
Atmos. Chem. Phys., 17, 3799–3821, https://doi.org/10.5194/acp-17-3799-2017, https://doi.org/10.5194/acp-17-3799-2017, 2017
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We present a modeling study on the impacts of the key processes (dust emission flux, convection and dust aging parameterizations) that control the transatlantic dust transport using an advanced version of the EMAC atmospheric chemistry general circulation model. We define the
direct effect of dust agingas an increase in the AOD as a result of hygroscopic growth. We define the
indirect effectas a reduction in the dust AOD due to the higher removal of the aged dust particles.
Anatolii Anisimov, Weichun Tao, Georgiy Stenchikov, Stoitchko Kalenderski, P. Jish Prakash, Zong-Liang Yang, and Mingjie Shi
Atmos. Chem. Phys., 17, 993–1015, https://doi.org/10.5194/acp-17-993-2017, https://doi.org/10.5194/acp-17-993-2017, 2017
Short summary
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This study is aimed at quantifying the fine-scale structure of dust emission from the western coastal plain of the Arabian Peninsula. Using the high-resolution modeling tools and up-to-date satellite inventories, we simulate and analyze the spatial and temporal variability of dust generation. The estimate of total dust emission from the coastal plain is 7.5 ± 0.5 Mt per year. We show that the study area is a stable dust generation zone and a potential source of mineral nutrients for the Red Sea.
Johann P. Engelbrecht, Hans Moosmüller, Samuel Pincock, R. K. M. Jayanty, Traci Lersch, and Gary Casuccio
Atmos. Chem. Phys., 16, 10809–10830, https://doi.org/10.5194/acp-16-10809-2016, https://doi.org/10.5194/acp-16-10809-2016, 2016
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This laboratory study was performed on re-suspended dust samples collected from several known dust sources of the world. We measured dust by multiple analytical techniques to understand their physical and chemical characteristics. Studies of the properties of dust are necessary to assess the magnitude of the growing dust problem, identify sources of dust, and, where feasible, apply preventative measures and remediation practices. Results can be used in global climate and health studies.
Klaus Klingmüller, Andrea Pozzer, Swen Metzger, Georgiy L. Stenchikov, and Jos Lelieveld
Atmos. Chem. Phys., 16, 5063–5073, https://doi.org/10.5194/acp-16-5063-2016, https://doi.org/10.5194/acp-16-5063-2016, 2016
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During the last decade, the Middle East experienced the strongest increase in atmospheric aerosol concentrations worldwide. Based on satellite observations, the present study corroborates this trend and reveals correlations with soil moisture and precipitation in and surrounding the Fertile Crescent. This suggests that the increasing drought conditions in this region have enhanced dust emissions, a tendency which is expected to be intensified by climate change.
Y. Zhang, N. Mahowald, R. A. Scanza, E. Journet, K. Desboeufs, S. Albani, J. F. Kok, G. Zhuang, Y. Chen, D. D. Cohen, A. Paytan, M. D. Patey, E. P. Achterberg, J. P. Engelbrecht, and K. W. Fomba
Biogeosciences, 12, 5771–5792, https://doi.org/10.5194/bg-12-5771-2015, https://doi.org/10.5194/bg-12-5771-2015, 2015
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A new technique to determine a size-fractionated global soil elemental emission inventory based on a global soil and mineralogical data set is introduced. Spatial variability of mineral dust elemental fractions (8 elements, e.g., Ca, Fe, Al) is identified on a global scale, particularly for Ca. The Ca/Al ratio ranged between 0.1 and 5.0 and is confirmed as an indicator of dust source regions by a global dust model. Total and soluble dust element fluxes into different ocean basins are estimated.
S. Osipov, G. Stenchikov, H. Brindley, and J. Banks
Atmos. Chem. Phys., 15, 9537–9553, https://doi.org/10.5194/acp-15-9537-2015, https://doi.org/10.5194/acp-15-9537-2015, 2015
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The radiative effect of dust over the Arabian Peninsula for different surfaces and for a range of optical depths is calculated and tested using satellite and ground-based observations.
P. Jish Prakash, G. Stenchikov, S. Kalenderski, S. Osipov, and H. Bangalath
Atmos. Chem. Phys., 15, 199–222, https://doi.org/10.5194/acp-15-199-2015, https://doi.org/10.5194/acp-15-199-2015, 2015
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This study aims to quantify the effect of severe dust events on radiation fluxes and regional climate characteristics over the Arabian Peninsula. We simulated the storm that occurred from 18 to 20 March 2012 and swept over a remarkably large area affecting the entire Middle East, North-Eastern Africa, Afghanistan, and Pakistan. We estimate that this storm generated over 94 Mt of dust and deposited approximately 1.2 Mt of dust into the Red Sea, bringing nutrients to marine ecosystems.
S. Kalenderski, G. Stenchikov, and C. Zhao
Atmos. Chem. Phys., 13, 1999–2014, https://doi.org/10.5194/acp-13-1999-2013, https://doi.org/10.5194/acp-13-1999-2013, 2013
Related subject area
Subject: Aerosols | Research Activity: Laboratory Studies | Altitude Range: Troposphere | Science Focus: Chemistry (chemical composition and reactions)
The role of surface-active macromolecules in the ice-nucleating ability of lignin, Snomax, and agricultural soil extracts
Secondary organic aerosol formation from nitrate radical oxidation of styrene: aerosol yields, chemical composition, and hydrolysis of organic nitrates
Hydrogen peroxide photoformation in particulate matter and its contribution to S(IV) oxidation during winter in Fairbanks, Alaska
The importance of burning conditions on the composition of domestic biomass-burning organic aerosol and the impact of atmospheric ageing
Heterogeneous phototransformation of halogenated polycyclic aromatic hydrocarbons: influencing factors, mechanisms and products
Boosting aerosol surface effects: strongly enhanced cooperative surface propensity of atmospherically relevant organic molecular ions in aqueous solution
Potential contribution to secondary aerosols from benzothiazoles in the atmospheric aqueous phase based on oxidation and oligomerization mechanisms
Roles of pH, ionic strength, and sulfate in the aqueous nitrate-mediated photooxidation of green leaf volatiles
The lifetimes and potential change in planetary albedo owing to the oxidation of thin surfactant organic films extracted from atmospheric aerosol by hydroxyl (OH) radicals at the air–water interface of particles
Gas-particle partitioning of m-xylene and naphthalene oxidation products: temperature and NOx influence
Surprisingly Robust Photochemistry in Subarctic Particles During Winter: Evidence from Photooxidants
Exometabolomic exploration of culturable airborne microorganisms from an urban atmosphere
Ozonolysis of primary biomass burning organic aerosol particles: Insights into reactivity and phase state
Measurement Report: Changes in ammonia emissions since the 18th century in south-eastern Europe inferred from an Elbrus (Caucasus, Russia) ice-core record
Atmospheric oxidation of 1,3-butadiene: influence of seed aerosol acidity and relative humidity on SOA composition and the production of air toxic compounds
Enhanced sulfate formation in mixed biomass burning and sea-salt interactions mediated by photosensitization: effects of chloride, nitrogen-containing compounds, and atmospheric aging
Photochemical aging of aviation emissions: transformation of chemical and physical properties of exhaust emissions from a laboratory-scale jet engine combustion chamber
Heterogeneous formation and light absorption of secondary organic aerosols from acetone photochemical reactions: remarkably enhancing effects of seeds and ammonia
Experimental observation of the impact of nanostructure on hygroscopicity and reactivity of fatty acid atmospheric aerosol proxies
Technical note: High-resolution analyses of concentrations and sizes of refractory black carbon particles deposited in northwestern Greenland over the past 350 years – Part 1: Continuous flow analysis of the SIGMA-D ice core using the wide-range Single-Particle Soot Photometer and a high-efficiency nebulizer
HOMs and SOA formation from the oxidation of α- and β-phellandrenes by NO3 radicals
Particulate emissions from cooking: emission factors, emission dynamics, and mass spectrometric analysis for different cooking methods
Copper accelerates photochemically induced radical chemistry of iron-containing SOA
Nocturnal atmospheric synergistic oxidation reduces the formation of low-volatility organic compounds from biogenic emissions
The interplay between aqueous replacement reaction and the phase state of internally mixed organic/ammonium aerosols
Measurement report: The Fifth International Workshop on Ice Nucleation phase 1 (FIN-01): intercomparison of single-particle mass spectrometers
Characterization of the particle size distribution, mineralogy, and Fe mode of occurrence of dust-emitting sediments from the Mojave Desert, California, USA
Measurement report: Effects of transition metal ions on the optical properties of humic-like substances (HULIS) reveal a structural preference – a case study of PM2.5 in Beijing, China
Probing Iceland's dust-emitting sediments: particle size distribution, mineralogy, cohesion, Fe mode of occurrence, and reflectance spectra signatures
Photoenhanced sulfate formation by the heterogeneous uptake of SO2 on non-photoactive mineral dust
Comparison of water-soluble and water-insoluble organic compositions attributing to different light absorption efficiency between residential coal and biomass burning emissions
Suppressed atmospheric chemical aging of cooking organic aerosol particles in wintertime conditions
Formation and loss of light absorbance by phenolic aqueous SOA by ●OH and an organic triplet excited state
Technical Note: A technique to convert NO2 to NO2− with S(IV) and its application to measuring nitrate photolysis
Distribution, chemical, and molecular composition of high and low molecular weight humic-like substances in ambient aerosols
Desorption lifetimes and activation energies influencing gas–surface interactions and multiphase chemical kinetics
Molecular analysis of secondary organic aerosol and brown carbon from the oxidation of indole
Secondary organic aerosol formed by Euro 5 gasoline vehicle emissions: chemical composition and gas-to-particle phase partitioning
Assessment of the contribution of residential waste burning to ambient PM10 concentrations in Hungary and Romania
Source differences in the components and cytotoxicity of PM2.5 from automobile exhaust, coal combustion, and biomass burning contributing to urban aerosol toxicity
Chamber studies of OH + dimethyl sulfoxide and dimethyl disulfide: insights into the dimethyl sulfide oxidation mechanism
Low-temperature ice nucleation of sea spray and secondary marine aerosols under cirrus cloud conditions
Temperature-dependent aqueous OH kinetics of C2–C10 linear and terpenoid alcohols and diols: new rate coefficients, structure–activity relationship, and atmospheric lifetimes
A possible unaccounted source of nitrogen-containing compound formation in aerosols: amines reacting with secondary ozonides
Seasonal variations in photooxidant formation and light absorption in aqueous extracts of ambient particles
Variability in sediment particle size, mineralogy, and Fe mode of occurrence across dust-source inland drainage basins: the case of the lower Drâa Valley, Morocco
Gas–particle partitioning of toluene oxidation products: an experimental and modeling study
Chemically speciated air pollutant emissions from open burning of household solid waste from South Africa
Bulk and molecular-level composition of primary organic aerosol from wood, straw, cow dung, and plastic burning
Volatile oxidation products and secondary organosiloxane aerosol from D5 + OH at varying OH exposures
Kathleen A. Alden, Paul Bieber, Anna J. Miller, Nicole Link, Benjamin J. Murray, and Nadine Borduas-Dedekind
Atmos. Chem. Phys., 25, 6179–6195, https://doi.org/10.5194/acp-25-6179-2025, https://doi.org/10.5194/acp-25-6179-2025, 2025
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Lignin and Snomax are surface-active macromolecules that show a relationship between increasing concentrations, decreasing surface tension, and increasing ice-nucleating ability. However, this relationship did not hold for agricultural soil extracts collected in the UK and Canada. To explain this difference, we propose that as the complexity of the sample increases, the hydrophobic interfaces in the bulk compete with the air–water interface.
Yuchen Wang, Xiang Zhang, Yuanlong Huang, Yutong Liang, and Nga L. Ng
Atmos. Chem. Phys., 25, 5215–5231, https://doi.org/10.5194/acp-25-5215-2025, https://doi.org/10.5194/acp-25-5215-2025, 2025
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This work provides the first fundamental laboratory data to evaluate SOA (secondary organic aerosol) production from styrene and NO3 chemistry. Additionally, the formation mechanisms of aromatic organic nitrates (ONs) are reported, highlighting that previously identified nitroaromatics in ambient field campaigns can be aromatic ONs. Finally, the hydrolysis lifetimes observed for ONs generated from styrene and NO3 oxidation can serve as experimentally constrained parameters for modeling hydrolysis of aromatic ONs in general.
Michael Oluwatoyin Sunday, Laura Marie Dahler Heinlein, Junwei He, Allison Moon, Sukriti Kapur, Ting Fang, Kasey C. Edwards, Fangzhou Guo, Jack Dibb, James H. Flynn III, Becky Alexander, Manabu Shiraiwa, and Cort Anastasio
Atmos. Chem. Phys., 25, 5087–5100, https://doi.org/10.5194/acp-25-5087-2025, https://doi.org/10.5194/acp-25-5087-2025, 2025
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Hydrogen peroxide (HOOH) is an important oxidant that forms atmospheric sulfate. We demonstrate that the illumination of brown carbon can rapidly form HOOH within particles, even under the low-sunlight conditions of Fairbanks, Alaska, during winter. This in-particle formation of HOOH is fast enough that it forms sulfate at significant rates. In contrast, the formation of HOOH in the gas phase during the campaign is expected to be negligible because of high NOx levels.
Rhianna L. Evans, Daniel J. Bryant, Aristeidis Voliotis, Dawei Hu, Huihui Wu, Sara Aisyah Syafira, Osayomwanbor E. Oghama, Gordon McFiggans, Jacqueline F. Hamilton, and Andrew R. Rickard
Atmos. Chem. Phys., 25, 4367–4389, https://doi.org/10.5194/acp-25-4367-2025, https://doi.org/10.5194/acp-25-4367-2025, 2025
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The chemical composition of organic aerosol derived from wood-burning emissions under different burning conditions was characterised. Fresh emissions from flaming and smouldering were largely aromatic in nature, whereas upon aging the aromatic content decreased. This decrease was greater for smouldering due to the loss of toxic polyaromatic species, whereas under flaming conditions highly toxic polyaromatic species were produced. These differences present an important challenge for future policy.
Yueyao Yang, Yahui Liu, Guohua Zhu, Bingcheng Lin, Shanshan Zhang, Xin Li, Fangxi Xu, He Niu, Rong Jin, and Minghui Zheng
Atmos. Chem. Phys., 25, 3981–3994, https://doi.org/10.5194/acp-25-3981-2025, https://doi.org/10.5194/acp-25-3981-2025, 2025
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Halogenated polycyclic aromatic hydrocarbons (XPAHs) are emerging pollutants. Stability during atmospheric transformation processes is crucial for predicting their environmental fate and assessing the associated risks. Here, we conducted field studies and laboratory simulation experiments to reveal the mechanisms, influencing factors and products for XPAHs' heterogeneous phototransformation. Results revealed that the conversion of XPAHs led to a reduction in environmental risk.
Harmanjot Kaur, Stephan Thürmer, Shirin Gholami, Bruno Credidio, Florian Trinter, Debora Vasconcelos, Ricardo Marinho, Joel Pinheiro, Hendrik Bluhm, Arnaldo Naves de Brito, Gunnar Öhrwall, Bernd Winter, and Olle Björneholm
Atmos. Chem. Phys., 25, 3503–3518, https://doi.org/10.5194/acp-25-3503-2025, https://doi.org/10.5194/acp-25-3503-2025, 2025
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Understanding the surface composition of aerosols is crucial for advancing climate models. We investigated the interface of single-component and mixed aqueous solutions of atmospherically relevant carboxylic acid and alkyl-ammonium ions using liquid-jet photoelectron spectroscopy. An exponential increase in surface propensity as a function of chain length was found for the single species, and cooperative effects in the mixtures cause a further drastic increase in surface solute concentration.
Qun Zhang, Wei Zhou, Shanshan Tang, Kai Huang, Jie Fu, Zechen Yu, Yunhe Teng, Shuyi Shen, Yang Mei, Xuezhi Yang, Jianjie Fu, and Guibin Jiang
EGUsphere, https://doi.org/10.5194/egusphere-2025-1028, https://doi.org/10.5194/egusphere-2025-1028, 2025
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This article comprehensively investigates the aqueous-phase OH oxidation of benzothiazoles (BTs), common rubber additives found in urban air, through laboratory simulation experiments. BTs can rapidly degrade, leading to light absorption, high yields of sulfate, and the formation of highly oxidized and/or oligomerized organic compounds. The results reveal that aqueous-phase BTs can contribute to secondary aerosols, altering the chemical and optical properties of atmospheric particles.
Yuting Lyu, Taekyu Joo, Ruihan Ma, Mark Kristan Espejo Cabello, Tianye Zhou, Shun Yeung, Cheuk Ki Wong, Yifang Gu, Yiming Qin, and Theodora Nah
EGUsphere, https://doi.org/10.5194/egusphere-2025-570, https://doi.org/10.5194/egusphere-2025-570, 2025
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We investigated the aqueous nitrate-mediated photooxidation of four green leaf volatiles (GLVs). The aqueous reaction medium conditions, dilute cloud/fog vs. concentrated aqueous aerosol conditions, governed the effects that pH, ionic strength, and sulfate have on the GLV degradation rates and aqSOA mass yields. Most notably, reactions initiated by sulfate photolysis have significant effects in aqueous aerosols, but not in cloud/fog droplets.
Rosalie H. Shepherd, Martin D. King, Andrew D. Ward, Edward J. Stuckey, Rebecca J. L. Welbourn, Neil Brough, Adam Milsom, Christian Pfrang, and Thomas Arnold
Atmos. Chem. Phys., 25, 2569–2588, https://doi.org/10.5194/acp-25-2569-2025, https://doi.org/10.5194/acp-25-2569-2025, 2025
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Thin film formation at the air–water interface from material extracted from atmospheric aerosol was demonstrated, supporting the core–shell morphology. Film thicknesses were approximately 10 Å and 17 Å for urban and remote extracts, respectively. Exposure to gas-phase OH radicals showed fast reactions and short lifetimes of around 1 h. The effect on the Earth's radiative balance indicated that removing half of the film could significantly increase the top-of-atmosphere albedo for urban films.
Marwa Shahin, Julien Kammer, Brice Temime-Roussel, and Barbara D'Anna
EGUsphere, https://doi.org/10.5194/egusphere-2025-833, https://doi.org/10.5194/egusphere-2025-833, 2025
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Air pollution and climate change are influenced by tiny airborne particles called aerosols. This study explores how pollutants from urban sources, as m-xylene and naphthalene, form new particles in the atmosphere under different conditions. Using advanced techniques, we show how temperature and nitrogen oxides affect the formation and behaviour of these particles. Our findings will improve our understanding on secondary organic particle and air quality models.
Laura Marie Dahler Heinlein, Junwei He, Michael Oluwatoyin Sunday, Fangzhou Guo, James Campbell, Allison Moon, Sukriti Kapur, Ting Fang, Kasey Edwards, Meeta Cesler-Maloney, Alyssa J. Burns, Jack Dibb, William Simpson, Manabu Shiraiwa, Becky Alexander, Jingqiu Mao, James H. Flynn III, Jochen Stutz, and Cort Anastasio
EGUsphere, https://doi.org/10.5194/egusphere-2025-824, https://doi.org/10.5194/egusphere-2025-824, 2025
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High-latitude cities like Fairbanks, Alaska, experience severe wintertime pollution episodes. While conventional wisdom holds that oxidation is slow under these conditions, field measurements find oxidized products in particles. To explore this, we measured oxidants in aqueous extracts of winter particles from Fairbanks. We find high concentrations of oxidants during illumination, indicating that particle photochemistry can be significant even in high latitudes during winter.
Rui Jin, Wei Hu, Peimin Duan, Ming Sheng, Dandan Liu, Ziye Huang, Mutong Niu, Libin Wu, Junjun Deng, and Pingqing Fu
Atmos. Chem. Phys., 25, 1805–1829, https://doi.org/10.5194/acp-25-1805-2025, https://doi.org/10.5194/acp-25-1805-2025, 2025
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The metabolic capacity of atmospheric microorganisms after settling into habitats is poorly understood. We studied the molecular composition of exometabolites for cultured typical airborne microbes and traced their metabolic processes. Bacteria and fungi produce highly oxidized exometabolites and have significant variations in metabolism among different strains. These insights are pivotal for assessing the biogeochemical impacts of atmospheric microorganisms following their deposition.
Sophie Bogler, Jun Zhang, Rico K. Y. Cheung, Kun Li, Andre S. H. Prevot, Imad El Haddad, and David M. Bell
EGUsphere, https://doi.org/10.5194/egusphere-2025-385, https://doi.org/10.5194/egusphere-2025-385, 2025
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Authentic aerosols emitted from residential wood stoves and open burning processes are only slightly oxidized by ozone in the atmosphere. Under dry conditions the reaction does not proceed to completion, while under high humidity conditions the reactivity proceeds further. These results indicate the reactivity with ozone is likely impacted by aerosol phase state (e.g. aerosol viscosity).
Michel Legrand, Mstislav Vorobyev, Daria Bokuchava, Stanislav Kutuzov, Andreas Plach, Andreas Stohl, Alexandra Khairedinova, Vladimir Mikhalenko, Maria Vinogradova, Sabine Eckhardt, and Susanne Preunkert
Atmos. Chem. Phys., 25, 1385–1399, https://doi.org/10.5194/acp-25-1385-2025, https://doi.org/10.5194/acp-25-1385-2025, 2025
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Past atmospheric NH3 pollution in south-eastern Europe was reconstructed by analysing ammonium in an ice core drilled at the Mount Elbrus (Caucasus, Russia). The observed 3.5-fold increase in ice concentrations between 1750 and 1990 CE is in good agreement with estimated past dominant ammonia emissions from agriculture, mainly from south European Russia and Türkiye. In contrast to present-day conditions, the ammonium level observed in 1750 CE indicates significant natural emissions at that time.
Mohammed Jaoui, Klara Nestorowicz, Krzysztof J. Rudzinski, Michael Lewandowski, Tadeusz E. Kleindienst, Julio Torres, Ewa Bulska, Witold Danikiewicz, and Rafal Szmigielski
Atmos. Chem. Phys., 25, 1401–1432, https://doi.org/10.5194/acp-25-1401-2025, https://doi.org/10.5194/acp-25-1401-2025, 2025
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Recent research has established the contribution of 1,3-butadiene (13BD) to organic aerosol formation with negative implications for urban air quality. Health effect studies have focused on whole particulate matter, but compounds responsible for adverse health effects remain uncertain. This study provides the effect of relative humidity and seed aerosol acidity on the chemical composition of aerosol formed from 13BD photooxidation.
Rongzhi Tang, Jialiang Ma, Ruifeng Zhang, Weizhen Cui, Yuanyuan Qin, Yangxi Chu, Yiming Qin, Alexander L. Vogel, and Chak K. Chan
Atmos. Chem. Phys., 25, 425–439, https://doi.org/10.5194/acp-25-425-2025, https://doi.org/10.5194/acp-25-425-2025, 2025
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This study provides laboratory evidence that the photosensitizers in biomass burning extracts can enhance sulfate formation in NaCl particles, primarily by triggering the formation of secondary oxidants under light and air conditions, with a lower contribution of direct photosensitization via triplets.
Anni Hartikainen, Mika Ihalainen, Deeksha Shukla, Marius Rohkamp, Arya Mukherjee, Quanfu He, Sandra Piel, Aki Virkkula, Delun Li, Tuukka Kokkola, Seongho Jeong, Hanna Koponen, Uwe Etzien, Anusmita Das, Krista Luoma, Lukas Schwalb, Thomas Gröger, Alexandre Barth, Martin Sklorz, Thorsten Streibel, Hendryk Czech, Benedikt Gündling, Markus Kalberer, Bert Buchholz, Andreas Hupfer, Thomas Adam, Thorsten Hohaus, Johan Øvrevik, Ralf Zimmermann, and Olli Sippula
EGUsphere, https://doi.org/10.5194/egusphere-2024-3836, https://doi.org/10.5194/egusphere-2024-3836, 2025
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Photochemical reactions altered the properties of kerosene-operated jet engine burner exhaust emissions, which were studied in laboratory using an oxidation flow reactor. Particle mass increased 300-fold as particles and gases became more oxidized. Light absorption increased, but the total direct radiative forcing efficiency was estimated to shift from positive to negative. The results highlight the importance of considering secondary aerosol formation when assessing the impacts of aviation.
Si Zhang, Yining Gao, Xinbei Xu, Luyao Chen, Can Wu, Zheng Li, Rongjie Li, Binyu Xiao, Xiaodi Liu, Rui Li, Fan Zhang, and Gehui Wang
Atmos. Chem. Phys., 24, 14177–14190, https://doi.org/10.5194/acp-24-14177-2024, https://doi.org/10.5194/acp-24-14177-2024, 2024
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Secondary organic aerosols (SOAs) from acetone photooxidation in the presence of various seeds were studied to illustrate SOA formation kinetics under ammonia-rich conditions. The oxidation mechanism of acetone was investigated using an observation-based model incorporating a Master Chemical Mechanism model. A higher SOA yield of acetone was observed compared to methylglyoxal due to an enhanced uptake of the small photooxidation products of acetone.
Adam Milsom, Adam M. Squires, Ben Laurence, Ben Wōden, Andrew J. Smith, Andrew D. Ward, and Christian Pfrang
Atmos. Chem. Phys., 24, 13571–13586, https://doi.org/10.5194/acp-24-13571-2024, https://doi.org/10.5194/acp-24-13571-2024, 2024
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We followed nano-structural changes in mixtures found in urban organic aerosol emissions (oleic acid, sodium oleate and fructose) during humidity change and ozone exposure. We demonstrate that self-assembly of fatty acid nanostructures can impact water uptake and chemical reactivity, affecting atmospheric lifetimes, urban air quality (preventing harmful emissions from degradation and enabling their long-range transport) and climate (affecting cloud formation), with implications for human health.
Kumiko Goto-Azuma, Remi Dallmayr, Yoshimi Ogawa-Tsukagawa, Nobuhiro Moteki, Tatsuhiro Mori, Sho Ohata, Yutaka Kondo, Makoto Koike, Motohiro Hirabayashi, Jun Ogata, Kyotaro Kitamura, Kenji Kawamura, Koji Fujita, Sumito Matoba, Naoko Nagatsuka, Akane Tsushima, Kaori Fukuda, and Teruo Aoki
Atmos. Chem. Phys., 24, 12985–13000, https://doi.org/10.5194/acp-24-12985-2024, https://doi.org/10.5194/acp-24-12985-2024, 2024
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We developed a continuous flow analysis system to analyze an ice core from northwestern Greenland and coupled it with an improved refractory black carbon (rBC) measurement technique. This allowed accurate high-resolution analyses of size distributions and concentrations of rBC particles with diameters of 70 nm–4 μm for the past 350 years. Our results provide crucial insights into rBC's climatic effects. We also found previous ice core studies substantially underestimated rBC mass concentrations.
Sergio Harb, Manuela Cirtog, Stéphanie Alage, Christopher Cantrell, Mathieu Cazaunau, Vincent Michoud, Edouard Pangui, Antonin Bergé, Chiara Giorio, Francesco Battaglia, and Bénédicte Picquet-Varrault
EGUsphere, https://doi.org/10.5194/egusphere-2024-3419, https://doi.org/10.5194/egusphere-2024-3419, 2024
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We investigated the reactions of α- and β-phellandrenes (from vegetation emissions) with NO3 radicals, a major nighttime oxidant from human activities. Using lab-based simulations, we examined these reactions and measured particle formation and by-products. Our findings reveal that α- and β-phellandrenes are efficient particle sources and enhance our understanding of biogenic-anthropogenic interactions and their contributions to atmospheric changes affecting climate and health.
Julia Pikmann, Frank Drewnick, Friederike Fachinger, and Stephan Borrmann
Atmos. Chem. Phys., 24, 12295–12321, https://doi.org/10.5194/acp-24-12295-2024, https://doi.org/10.5194/acp-24-12295-2024, 2024
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Cooking activities can contribute substantially to indoor and ambient aerosol. We performed a comprehensive study with laboratory measurements cooking 19 different dishes and ambient measurements at two Christmas markets measuring various particle properties and trace gases of emissions in real time. Similar emission characteristics were observed for dishes with the same preparation method, mainly due to similar cooking temperature and use of oil, with barbecuing as an especially strong source.
Kevin Kilchhofer, Markus Ammann, Laura Torrent, Ka Yuen Cheung, and Peter Aaron Alpert
EGUsphere, https://doi.org/10.5194/egusphere-2024-3226, https://doi.org/10.5194/egusphere-2024-3226, 2024
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Aerosol particles composed of metal complexes generate radicals as the result of photochemical reactions. Reactive species generated are hazardous to human health. We report microscopy data with particles composed of an organic proxy exposed to UV light. We found that copper influenced the reoxidation and initial iron reduction via photolysis of the complex. New model results suggest that we need to account a decreased photochemical activity and use a copper-induced reoxidation reaction.
Han Zang, Zekun Luo, Chenxi Li, Ziyue Li, Dandan Huang, and Yue Zhao
Atmos. Chem. Phys., 24, 11701–11716, https://doi.org/10.5194/acp-24-11701-2024, https://doi.org/10.5194/acp-24-11701-2024, 2024
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Atmospheric organics are subject to synergistic oxidation by different oxidants, yet the mechanisms of such processes are poorly understood. Here, using direct measurements and kinetic modeling, we probe the nocturnal synergistic-oxidation mechanism of α-pinene by O3 and NO3 radicals and in particular the fate of peroxy radical intermediates of different origins, which will deepen our understanding of the monoterpene oxidation chemistry and its contribution to atmospheric particle formation.
Hui Yang, Fengfeng Dong, Li Xia, Qishen Huang, Shufeng Pang, and Yunhong Zhang
Atmos. Chem. Phys., 24, 11619–11635, https://doi.org/10.5194/acp-24-11619-2024, https://doi.org/10.5194/acp-24-11619-2024, 2024
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Atmospheric secondary aerosols, composed of organic and inorganic components, undergo complex reactions that impact their phase state. Using molecular spectroscopy, we showed that ammonium-promoted aqueous replacement reaction, unique to these aerosols, is closely linked to phase behavior. The interplay between reactions and aerosol phase state can cause atypical phase transition and irreversible changes in aerosol composition during hygroscopic cycles, further impacting atmospheric processes.
Xiaoli Shen, David M. Bell, Hugh Coe, Naruki Hiranuma, Fabian Mahrt, Nicholas A. Marsden, Claudia Mohr, Daniel M. Murphy, Harald Saathoff, Johannes Schneider, Jacqueline Wilson, Maria A. Zawadowicz, Alla Zelenyuk, Paul J. DeMott, Ottmar Möhler, and Daniel J. Cziczo
Atmos. Chem. Phys., 24, 10869–10891, https://doi.org/10.5194/acp-24-10869-2024, https://doi.org/10.5194/acp-24-10869-2024, 2024
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Single-particle mass spectrometry (SPMS) is commonly used to measure the chemical composition and mixing state of aerosol particles. Intercomparison of SPMS instruments was conducted. All instruments reported similar size ranges and common spectral features. The instrument-specific detection efficiency was found to be more dependent on particle size than type. All differentiated secondary organic aerosol, soot, and soil dust but had difficulties differentiating among minerals and dusts.
Adolfo González-Romero, Cristina González-Flórez, Agnesh Panta, Jesús Yus-Díez, Patricia Córdoba, Andres Alastuey, Natalia Moreno, Melani Hernández-Chiriboga, Konrad Kandler, Martina Klose, Roger N. Clark, Bethany L. Ehlmann, Rebecca N. Greenberger, Abigail M. Keebler, Phil Brodrick, Robert Green, Paul Ginoux, Xavier Querol, and Carlos Pérez García-Pando
Atmos. Chem. Phys., 24, 9155–9176, https://doi.org/10.5194/acp-24-9155-2024, https://doi.org/10.5194/acp-24-9155-2024, 2024
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In this research, we studied the dust-emitting properties of crusts and aeolian ripples from the Mojave Desert. These properties are key to understanding the effect of dust upon climate. We found two different playa lakes according to the groundwater regime, which implies differences in crusts' cohesion state and mineralogy, which can affect the dust emission potential and properties. We also compare them with Moroccan Sahara crusts and Icelandic top sediments.
Juanjuan Qin, Leiming Zhang, Yuanyuan Qin, Shaoxuan Shi, Jingnan Li, Zhao Shu, Yuwei Gao, Ting Qi, Jihua Tan, and Xinming Wang
Atmos. Chem. Phys., 24, 7575–7589, https://doi.org/10.5194/acp-24-7575-2024, https://doi.org/10.5194/acp-24-7575-2024, 2024
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The present research unveiled that acidity dominates while transition metal ions harmonize with the light absorption properties of humic-like substances (HULIS). Cu2+ has quenching effects on HULIS by complexation, hydrogen substitution, or electrostatic adsorption, with aromatic structures of HULIS. Such effects are less pronounced if from Mn2+, Ni2+, Zn2+, and Cu2+. Oxidized HULIS might contain electron-donating groups, whereas N-containing compounds might contain electron-withdrawing groups.
Adolfo González-Romero, Cristina González-Flórez, Agnesh Panta, Jesús Yus-Díez, Patricia Córdoba, Andres Alastuey, Natalia Moreno, Konrad Kandler, Martina Klose, Roger N. Clark, Bethany L. Ehlmann, Rebecca N. Greenberger, Abigail M. Keebler, Phil Brodrick, Robert O. Green, Xavier Querol, and Carlos Pérez García-Pando
Atmos. Chem. Phys., 24, 6883–6910, https://doi.org/10.5194/acp-24-6883-2024, https://doi.org/10.5194/acp-24-6883-2024, 2024
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The knowledge of properties from dust emitted in high latitudes such as in Iceland is scarce. This study focuses on the particle size, mineralogy, cohesion, and iron mode of occurrence and reflectance spectra of dust-emitting sediments. Icelandic top sediments have lower cohesion state, coarser particle size, distinctive mineralogy, and 3-fold bulk Fe content, with a large presence of magnetite compared to Saharan crusts.
Wangjin Yang, Jiawei Ma, Hongxing Yang, Fu Li, and Chong Han
Atmos. Chem. Phys., 24, 6757–6768, https://doi.org/10.5194/acp-24-6757-2024, https://doi.org/10.5194/acp-24-6757-2024, 2024
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We provide evidence that light enhances the conversion of SO2 to sulfates on non-photoactive mineral dust, where triplet states of SO2 (3SO2) can act as a pivotal trigger to generate sulfates. Photochemical sulfate formation depends on H2O, O2, and basicity of mineral dust. The SO2 photochemistry on non-photoactive mineral dust contributes to sulfates, highlighting previously unknown pathways to better explain the missing sources of atmospheric sulfates.
Lu Zhang, Jin Li, Yaojie Li, Xinlei Liu, Zhihan Luo, Guofeng Shen, and Shu Tao
Atmos. Chem. Phys., 24, 6323–6337, https://doi.org/10.5194/acp-24-6323-2024, https://doi.org/10.5194/acp-24-6323-2024, 2024
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Brown carbon (BrC) is related to radiative forcing and climate change. The BrC fraction from residential coal and biomass burning emissions, which were the major source of BrC, was characterized at the molecular level. The CHOS aromatic compounds explained higher light absorption efficiencies of biomass burning emissions compared to coal. The unique formulas of coal combustion aerosols were characterized by higher unsaturated compounds, and such information could be used for source appointment.
Wenli Liu, Longkun He, Yingjun Liu, Keren Liao, Qi Chen, and Mikinori Kuwata
Atmos. Chem. Phys., 24, 5625–5636, https://doi.org/10.5194/acp-24-5625-2024, https://doi.org/10.5194/acp-24-5625-2024, 2024
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Cooking is a major source of particles in urban areas. Previous studies demonstrated that the chemical lifetimes of cooking organic aerosols (COAs) were much shorter (~minutes) than the values reported by field observations (~hours). We conducted laboratory experiments to resolve the discrepancy by considering suppressed reactivity under low temperature. The parameterized k2–T relationships and observed surface temperature data were used to estimate the chemical lifetimes of COA particles.
Stephanie Arciva, Lan Ma, Camille Mavis, Chrystal Guzman, and Cort Anastasio
Atmos. Chem. Phys., 24, 4473–4485, https://doi.org/10.5194/acp-24-4473-2024, https://doi.org/10.5194/acp-24-4473-2024, 2024
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We measured changes in light absorption during the aqueous oxidation of six phenols with hydroxyl radical (●OH) or an organic triplet excited state (3C*). All the phenols formed light-absorbing secondary brown carbon (BrC), which then decayed with continued oxidation. Extrapolation to ambient conditions suggest ●OH is the dominant sink of secondary phenolic BrC in fog/cloud drops, while 3C* controls the lifetime of this light absorption in particle water.
Aaron Lieberman, Julietta Picco, Murat Onder, and Cort Anastasio
Atmos. Chem. Phys., 24, 4411–4419, https://doi.org/10.5194/acp-24-4411-2024, https://doi.org/10.5194/acp-24-4411-2024, 2024
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We developed a method that uses aqueous S(IV) to quantitatively convert NO2 to NO2−, which allows both species to be quantified using the Griess method. As an example of the utility of the method, we quantified both photolysis channels of nitrate, with and without a scavenger for hydroxyl radical (·OH). The results show that without a scavenger, ·OH reacts with nitrite to form nitrogen dioxide, suppressing the apparent quantum yield of NO2− and enhancing that of NO2.
Xingjun Fan, Ao Cheng, Xufang Yu, Tao Cao, Dan Chen, Wenchao Ji, Yongbing Cai, Fande Meng, Jianzhong Song, and Ping'an Peng
Atmos. Chem. Phys., 24, 3769–3783, https://doi.org/10.5194/acp-24-3769-2024, https://doi.org/10.5194/acp-24-3769-2024, 2024
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Molecular-level characteristics of high molecular weight (HMW) and low MW (LMW) humic-like substances (HULIS) were comprehensively investigated, where HMW HULIS had larger chromophores and larger molecular size than LMW HULIS and exhibited higher aromaticity and humification. Electrospray ionization high-resolution mass spectrometry revealed more aromatic molecules in HMW HULIS. HMW HULIS had more CHON compounds, while LMW HULIS had more CHO compounds.
Daniel A. Knopf, Markus Ammann, Thomas Berkemeier, Ulrich Pöschl, and Manabu Shiraiwa
Atmos. Chem. Phys., 24, 3445–3528, https://doi.org/10.5194/acp-24-3445-2024, https://doi.org/10.5194/acp-24-3445-2024, 2024
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The initial step of interfacial and multiphase chemical processes involves adsorption and desorption of gas species. This study demonstrates the role of desorption energy governing the residence time of the gas species at the environmental interface. A parameterization is formulated that enables the prediction of desorption energy based on the molecular weight, polarizability, and oxygen-to-carbon ratio of the desorbing chemical species. Its application to gas–particle interactions is discussed.
Feng Jiang, Kyla Siemens, Claudia Linke, Yanxia Li, Yiwei Gong, Thomas Leisner, Alexander Laskin, and Harald Saathoff
Atmos. Chem. Phys., 24, 2639–2649, https://doi.org/10.5194/acp-24-2639-2024, https://doi.org/10.5194/acp-24-2639-2024, 2024
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We investigated the optical properties, chemical composition, and formation mechanisms of secondary organic aerosol (SOA) and brown carbon (BrC) from the oxidation of indole with and without NO2 in the Aerosol Interaction and Dynamics in the Atmosphere (AIDA) simulation chamber. This work is one of the very few to link the optical properties and chemical composition of indole SOA with and without NO2 by simulation chamber experiments.
Evangelia Kostenidou, Baptiste Marques, Brice Temime-Roussel, Yao Liu, Boris Vansevenant, Karine Sartelet, and Barbara D'Anna
Atmos. Chem. Phys., 24, 2705–2729, https://doi.org/10.5194/acp-24-2705-2024, https://doi.org/10.5194/acp-24-2705-2024, 2024
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Secondary organic aerosol (SOA) from gasoline vehicles can be a significant source of particulate matter in urban areas. Here the chemical composition of secondary volatile organic compounds and SOA produced by photo-oxidation of Euro 5 gasoline vehicle emissions was studied. The volatility of the SOA formed was calculated. Except for the temperature and the concentration of the aerosol, additional parameters may play a role in the gas-to-particle partitioning.
András Hoffer, Aida Meiramova, Ádám Tóth, Beatrix Jancsek-Turóczi, Gyula Kiss, Ágnes Rostási, Erika Andrea Levei, Luminita Marmureanu, Attila Machon, and András Gelencsér
Atmos. Chem. Phys., 24, 1659–1671, https://doi.org/10.5194/acp-24-1659-2024, https://doi.org/10.5194/acp-24-1659-2024, 2024
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Specific tracer compounds identified previously in controlled test burnings of different waste types in the laboratory were detected and quantified in ambient PM10 samples collected in five Hungarian and four Romanian settlements. Back-of-the-envelope calculations based on the relative emission factors of individual tracers suggested that the contribution of solid waste burning particulate emissions to ambient PM10 mass concentrations may be as high as a few percent.
Xiao-San Luo, Weijie Huang, Guofeng Shen, Yuting Pang, Mingwei Tang, Weijun Li, Zhen Zhao, Hanhan Li, Yaqian Wei, Longjiao Xie, and Tariq Mehmood
Atmos. Chem. Phys., 24, 1345–1360, https://doi.org/10.5194/acp-24-1345-2024, https://doi.org/10.5194/acp-24-1345-2024, 2024
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PM2.5 are air pollutants threatening health globally, but they are a mixture of chemical compositions from many sources and result in unequal toxicity. Which composition from which source of PM2.5 as the most hazardous object is a question hindering effective pollution control policy-making. With chemical and toxicity experiments, we found automobile exhaust and coal combustion to be priority emissions with higher toxic compositions for precise air pollution control, ensuring public health.
Matthew B. Goss and Jesse H. Kroll
Atmos. Chem. Phys., 24, 1299–1314, https://doi.org/10.5194/acp-24-1299-2024, https://doi.org/10.5194/acp-24-1299-2024, 2024
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The chemistry driving dimethyl sulfide (DMS) oxidation and subsequent sulfate particle formation in the atmosphere is poorly constrained. We oxidized two related compounds (dimethyl sulfoxide and dimethyl disulfide) in the laboratory under varied NOx conditions and measured the gas- and particle-phase products. These results demonstrate that both the OH addition and OH abstraction pathways for DMS oxidation contribute to particle formation via mechanisms that do not involve the SO2 intermediate.
Ryan J. Patnaude, Kathryn A. Moore, Russell J. Perkins, Thomas C. J. Hill, Paul J. DeMott, and Sonia M. Kreidenweis
Atmos. Chem. Phys., 24, 911–928, https://doi.org/10.5194/acp-24-911-2024, https://doi.org/10.5194/acp-24-911-2024, 2024
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In this study we examined the effect of atmospheric aging on sea spray aerosols (SSAs) to form ice and how newly formed secondary marine aerosols (SMAs) may freeze at cirrus temperatures (< −38 °C). Results show that SSAs freeze at different relative humidities (RHs) depending on the temperature and that the ice-nucleating ability of SSA was not hindered by atmospheric aging. SMAs are shown to freeze at high RHs and are likely inefficient at forming ice at cirrus temperatures.
Bartłomiej Witkowski, Priyanka Jain, Beata Wileńska, and Tomasz Gierczak
Atmos. Chem. Phys., 24, 663–688, https://doi.org/10.5194/acp-24-663-2024, https://doi.org/10.5194/acp-24-663-2024, 2024
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This article reports the results of the kinetic measurements for the aqueous oxidation of the 29 aliphatic alcohols by hydroxyl radical (OH) at different temperatures. The data acquired and the literature data were used to optimize a model for predicting the aqueous OH reactivity of alcohols and carboxylic acids and to estimate the atmospheric lifetimes of five terpenoic alcohols. The kinetic data provided new insights into the mechanism of aqueous oxidation of aliphatic molecules by the OH.
Junting Qiu, Xinlin Shen, Jiangyao Chen, Guiying Li, and Taicheng An
Atmos. Chem. Phys., 24, 155–166, https://doi.org/10.5194/acp-24-155-2024, https://doi.org/10.5194/acp-24-155-2024, 2024
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We studied reactions of secondary ozonides (SOZs) with amines. SOZs formed from ozonolysis of β-caryophyllene and α-humulene are found to be reactive to ethylamine and methylamine. Products from SOZs with various conformations reacting with the same amine had different functional groups. Our findings indicate that interaction of SOZs with amines in the atmosphere is very complicated, which is potentially a hitherto unrecognized source of N-containing compound formation.
Lan Ma, Reed Worland, Laura Heinlein, Chrystal Guzman, Wenqing Jiang, Christopher Niedek, Keith J. Bein, Qi Zhang, and Cort Anastasio
Atmos. Chem. Phys., 24, 1–21, https://doi.org/10.5194/acp-24-1-2024, https://doi.org/10.5194/acp-24-1-2024, 2024
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We measured concentrations of three photooxidants – the hydroxyl radical, triplet excited states of organic carbon, and singlet molecular oxygen – in fine particles collected over a year. Concentrations are highest in extracts of fresh biomass burning particles, largely because they have the highest particle concentrations and highest light absorption. When normalized by light absorption, rates of formation for each oxidant are generally similar for the four particle types we observed.
Adolfo González-Romero, Cristina González-Flórez, Agnesh Panta, Jesús Yus-Díez, Cristina Reche, Patricia Córdoba, Natalia Moreno, Andres Alastuey, Konrad Kandler, Martina Klose, Clarissa Baldo, Roger N. Clark, Zongbo Shi, Xavier Querol, and Carlos Pérez García-Pando
Atmos. Chem. Phys., 23, 15815–15834, https://doi.org/10.5194/acp-23-15815-2023, https://doi.org/10.5194/acp-23-15815-2023, 2023
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The effect of dust emitted from desertic surfaces upon climate and ecosystems depends on size and mineralogy, but data from soil mineral atlases of desert soils are scarce. We performed particle-size distribution, mineralogy, and Fe speciation in southern Morocco. Results show coarser particles with high quartz proportion are near the elevated areas, while in depressed areas, sizes are finer, and proportions of clays and nano-Fe oxides are higher. This difference is important for dust modelling.
Victor Lannuque, Barbara D'Anna, Evangelia Kostenidou, Florian Couvidat, Alvaro Martinez-Valiente, Philipp Eichler, Armin Wisthaler, Markus Müller, Brice Temime-Roussel, Richard Valorso, and Karine Sartelet
Atmos. Chem. Phys., 23, 15537–15560, https://doi.org/10.5194/acp-23-15537-2023, https://doi.org/10.5194/acp-23-15537-2023, 2023
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Large uncertainties remain in understanding secondary organic aerosol (SOA) formation from toluene oxidation. In this study, speciation measurements in gaseous and particulate phases were carried out, providing partitioning and volatility data on individual toluene SOA components at different temperatures. A new detailed oxidation mechanism was developed to improve modeled speciation, and effects of different processes involved in gas–particle partitioning at the molecular scale are explored.
Xiaoliang Wang, Hatef Firouzkouhi, Judith C. Chow, John G. Watson, Steven Sai Hang Ho, Warren Carter, and Alexandra S. M. De Vos
Atmos. Chem. Phys., 23, 15375–15393, https://doi.org/10.5194/acp-23-15375-2023, https://doi.org/10.5194/acp-23-15375-2023, 2023
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Open burning of municipal solid waste emits chemicals that are harmful to the environment. This paper reports source profiles and emission factors for PM2.5 species and acidic/alkali gases from laboratory combustion of 10 waste categories (including plastics and biomass) that represent open burning in South Africa. Results will be useful for health and climate impact assessments, speciated emission inventories, source-oriented dispersion models, and receptor-based source apportionment.
Jun Zhang, Kun Li, Tiantian Wang, Erlend Gammelsæter, Rico K. Y. Cheung, Mihnea Surdu, Sophie Bogler, Deepika Bhattu, Dongyu S. Wang, Tianqu Cui, Lu Qi, Houssni Lamkaddam, Imad El Haddad, Jay G. Slowik, Andre S. H. Prevot, and David M. Bell
Atmos. Chem. Phys., 23, 14561–14576, https://doi.org/10.5194/acp-23-14561-2023, https://doi.org/10.5194/acp-23-14561-2023, 2023
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We conducted burning experiments to simulate various types of solid fuel combustion, including residential burning, wildfires, agricultural burning, cow dung, and plastic bag burning. The chemical composition of the particles was characterized using mass spectrometers, and new potential markers for different fuels were identified using statistical analysis. This work improves our understanding of emissions from solid fuel burning and offers support for refined source apportionment.
Hyun Gu Kang, Yanfang Chen, Yoojin Park, Thomas Berkemeier, and Hwajin Kim
Atmos. Chem. Phys., 23, 14307–14323, https://doi.org/10.5194/acp-23-14307-2023, https://doi.org/10.5194/acp-23-14307-2023, 2023
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D5 is an emerging anthropogenic pollutant that is ubiquitous in indoor and urban environments, and the OH oxidation of D5 forms secondary organosiloxane aerosol (SOSiA). Application of a kinetic box model that uses a volatility basis set (VBS) showed that consideration of oxidative aging (aging-VBS) predicts SOSiA formation much better than using a standard-VBS model. Ageing-dependent parameterization is needed to accurately model SOSiA to assess the implications of siloxanes for air quality.
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Short summary
The study is on the mineralogical, chemical and physical properties of surface soil samples from the Arabian Red Sea coastal plain. The sampled sites were previously identified to be potential source areas for windblown mineral dust. Results from this study will improve dust transport and other types of modeling, and also provide a better assessment of the impact of coastal dust on the Red Sea.
The study is on the mineralogical, chemical and physical properties of surface soil samples from...
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