Articles | Volume 23, issue 15
https://doi.org/10.5194/acp-23-8659-2023
© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/acp-23-8659-2023
© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
08 Aug 2023
Research article |
| 08 Aug 2023
| 08 Aug 2023
Physicochemical characterization of free troposphere and marine boundary layer ice-nucleating particles collected by aircraft in the eastern North Atlantic
Daniel A. Knopf
CORRESPONDING AUTHOR
School of Marine and Atmospheric Sciences, Stony Brook University,
Stony Brook, NY 11794, USA
Department of Chemistry, Stony Brook University, Stony Brook, NY
11794, USA
Peiwen Wang
School of Marine and Atmospheric Sciences, Stony Brook University,
Stony Brook, NY 11794, USA
Benny Wong
School of Marine and Atmospheric Sciences, Stony Brook University,
Stony Brook, NY 11794, USA
Department of Chemistry, Stony Brook University, Stony Brook, NY
11794, USA
Jay M. Tomlin
Department of Chemistry, Purdue University, West Lafayette, IN 47907,
USA
Daniel P. Veghte
Environmental Molecular Sciences Laboratory/Pacific Northwest National
Laboratory, Richland, WA 99354, USA
current address: Center for Electron Microscopy and Analysis,
The Ohio State University, Columbus, OH 43212, USA
Nurun N. Lata
Environmental Molecular Sciences Laboratory/Pacific Northwest National
Laboratory, Richland, WA 99354, USA
Swarup China
Environmental Molecular Sciences Laboratory/Pacific Northwest National
Laboratory, Richland, WA 99354, USA
Alexander Laskin
Department of Chemistry, Purdue University, West Lafayette, IN 47907,
USA
Ryan C. Moffet
Sonoma Technology, Inc., Petaluma, CA 94954, USA
Josephine Y. Aller
School of Marine and Atmospheric Sciences, Stony Brook University,
Stony Brook, NY 11794, USA
Matthew A. Marcus
Advanced Light Source, Lawrence Berkeley National Laboratory,
Berkeley, CA 94720, USA
Jian Wang
Center for Aerosol Science and Engineering, Department of Energy,
Environmental and Chemical Engineering, Washington University in St. Louis,
St. Louis, MO 63130, USA
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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
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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.
Yang Wang, Chanakya Bagya Ramesh, Scott E. Giangrande, Jerome Fast, Xianda Gong, Jiaoshi Zhang, Ahmet Tolga Odabasi, Marcus Vinicius Batista Oliveira, Alyssa Matthews, Fan Mei, John E. Shilling, Jason Tomlinson, Die Wang, and Jian Wang
Atmos. Chem. Phys., 23, 15671–15691, https://doi.org/10.5194/acp-23-15671-2023, https://doi.org/10.5194/acp-23-15671-2023, 2023
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We report the vertical profiles of aerosol properties over the Southern Great Plains (SGP), a region influenced by shallow convective clouds, land–atmosphere interactions, boundary layer turbulence, and the aerosol life cycle. We examined the processes that drive the aerosol population and distribution in the lower troposphere over the SGP. This study helps improve our understanding of aerosol–cloud interactions and the model representation of aerosol processes.
Rodanthi-Elisavet Mamouri, Albert Ansmann, Kevin Ohneiser, Daniel A. Knopf, Argyro Nisantzi, Johannes Bühl, Ronny Engelmann, Annett Skupin, Patric Seifert, Holger Baars, Dragos Ene, Ulla Wandinger, and Diofantos Hadjimitsis
Atmos. Chem. Phys., 23, 14097–14114, https://doi.org/10.5194/acp-23-14097-2023, https://doi.org/10.5194/acp-23-14097-2023, 2023
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For the first time, rather clear evidence is found that wildfire smoke particles can trigger strong cirrus formation. This finding is of importance because intensive and large wildfires may occur increasingly often in the future as climate change proceeds. Based on lidar observations in Cyprus in autumn 2020, we provide detailed insight into the cirrus formation at the tropopause in the presence of aged wildfire smoke (here, 8–9 day old Californian wildfire smoke).
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.
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.
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.
Francesca Gallo, Janek Uin, Kevin J. Sanchez, Richard H. Moore, Jian Wang, Robert Wood, Fan Mei, Connor Flynn, Stephen Springston, Eduardo B. Azevedo, Chongai Kuang, and Allison C. Aiken
Atmos. Chem. Phys., 23, 4221–4246, https://doi.org/10.5194/acp-23-4221-2023, https://doi.org/10.5194/acp-23-4221-2023, 2023
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This study provides a summary statistic of multiday aerosol plume transport event influences on aerosol physical properties and the cloud condensation nuclei budget at the U.S. Department of Energy Atmospheric Radiation Measurement Facility in the eastern North Atlantic (ENA). An algorithm that integrates aerosol properties is developed and applied to identify multiday aerosol transport events. The influence of the aerosol plumes on aerosol populations at the ENA is successively assessed.
Haley M. Royer, Mira L. Pöhlker, Ovid Krüger, Edmund Blades, Peter Sealy, Nurun Nahar Lata, Zezhen Cheng, Swarup China, Andrew P. Ault, Patricia K. Quinn, Paquita Zuidema, Christopher Pöhlker, Ulrich Pöschl, Meinrat Andreae, and Cassandra J. Gaston
Atmos. Chem. Phys., 23, 981–998, https://doi.org/10.5194/acp-23-981-2023, https://doi.org/10.5194/acp-23-981-2023, 2023
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This paper presents atmospheric particle chemical composition and measurements of aerosol water uptake properties collected at Ragged Point, Barbados, during the winter of 2020. The result of this study indicates the importance of small African smoke particles for cloud droplet formation in the tropical North Atlantic and highlights the large spatial and temporal pervasiveness of smoke over the Atlantic Ocean.
Qianjie Chen, Jessica A. Mirrielees, Sham Thanekar, Nicole A. Loeb, Rachel M. Kirpes, Lucia M. Upchurch, Anna J. Barget, Nurun Nahar Lata, Angela R. W. Raso, Stephen M. McNamara, Swarup China, Patricia K. Quinn, Andrew P. Ault, Aaron Kennedy, Paul B. Shepson, Jose D. Fuentes, and Kerri A. Pratt
Atmos. Chem. Phys., 22, 15263–15285, https://doi.org/10.5194/acp-22-15263-2022, https://doi.org/10.5194/acp-22-15263-2022, 2022
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During a spring field campaign in the coastal Arctic, ultrafine particles were enhanced during high wind speeds, and coarse-mode particles were reduced during blowing snow. Calculated periods blowing snow were overpredicted compared to observations. Sea spray aerosols produced by sea ice leads affected the composition of aerosols and snowpack. An improved understanding of aerosol emissions from leads and blowing snow is critical for predicting the future climate of the rapidly warming Arctic.
Albert Ansmann, Kevin Ohneiser, Alexandra Chudnovsky, Daniel A. Knopf, Edwin W. Eloranta, Diego Villanueva, Patric Seifert, Martin Radenz, Boris Barja, Félix Zamorano, Cristofer Jimenez, Ronny Engelmann, Holger Baars, Hannes Griesche, Julian Hofer, Dietrich Althausen, and Ulla Wandinger
Atmos. Chem. Phys., 22, 11701–11726, https://doi.org/10.5194/acp-22-11701-2022, https://doi.org/10.5194/acp-22-11701-2022, 2022
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For the first time we present a systematic study on the impact of wildfire smoke on ozone depletion in the Arctic (2020) and Antarctic stratosphere (2020, 2021). Two major fire events in Siberia and Australia were responsible for the observed record-breaking stratospheric smoke pollution. Our analyses were based on lidar observations of smoke parameters (Polarstern, Punta Arenas) and NDACC Arctic and Antarctic ozone profiles as well as on Antarctic OMI satellite observations of column ozone.
Jerome D. Fast, David M. Bell, Gourihar Kulkarni, Jiumeng Liu, Fan Mei, Georges Saliba, John E. Shilling, Kaitlyn Suski, Jason Tomlinson, Jian Wang, Rahul Zaveri, and Alla Zelenyuk
Atmos. Chem. Phys., 22, 11217–11238, https://doi.org/10.5194/acp-22-11217-2022, https://doi.org/10.5194/acp-22-11217-2022, 2022
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Recent aircraft measurements from the HI-SCALE campaign conducted over the Southern Great Plains (SGP) site in Oklahoma are used to quantify spatial variability of aerosol properties in terms of grid spacings typically used by weather and climate models. Surprisingly large horizontal gradients in aerosol properties were frequently observed in this rural area. This spatial variability can be used as an uncertainty range when comparing surface point measurements with model predictions.
Ivo Beck, Hélène Angot, Andrea Baccarini, Lubna Dada, Lauriane Quéléver, Tuija Jokinen, Tiia Laurila, Markus Lampimäki, Nicolas Bukowiecki, Matthew Boyer, Xianda Gong, Martin Gysel-Beer, Tuukka Petäjä, Jian Wang, and Julia Schmale
Atmos. Meas. Tech., 15, 4195–4224, https://doi.org/10.5194/amt-15-4195-2022, https://doi.org/10.5194/amt-15-4195-2022, 2022
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We present the pollution detection algorithm (PDA), a new method to identify local primary pollution in remote atmospheric aerosol and trace gas time series. The PDA identifies periods of contaminated data and relies only on the target dataset itself; i.e., it is independent of ancillary data such as meteorological variables. The parameters of all pollution identification steps are adjustable so that the PDA can be tuned to different locations and situations. It is available as open-access code.
Zezhen Cheng, Megan Morgenstern, Bo Zhang, Matthew Fraund, Nurun Nahar Lata, Rhenton Brimberry, Matthew A. Marcus, Lynn Mazzoleni, Paulo Fialho, Silvia Henning, Birgit Wehner, Claudio Mazzoleni, and Swarup China
Atmos. Chem. Phys., 22, 9033–9057, https://doi.org/10.5194/acp-22-9033-2022, https://doi.org/10.5194/acp-22-9033-2022, 2022
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We observed a high abundance of liquid and internally mixed particles in samples collected in the North Atlantic free troposphere during summer. We also found several solid and semisolid particles for different emission sources and transport patterns. Our results suggest that considering the mixing state, emission source, and transport patterns of particles is necessary to estimate their phase state in the free troposphere, which is critical for predicting their effects on climate.
Kevin Ohneiser, Albert Ansmann, Bernd Kaifler, Alexandra Chudnovsky, Boris Barja, Daniel A. Knopf, Natalie Kaifler, Holger Baars, Patric Seifert, Diego Villanueva, Cristofer Jimenez, Martin Radenz, Ronny Engelmann, Igor Veselovskii, and Félix Zamorano
Atmos. Chem. Phys., 22, 7417–7442, https://doi.org/10.5194/acp-22-7417-2022, https://doi.org/10.5194/acp-22-7417-2022, 2022
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We present and discuss 2 years of long-term lidar observations of the largest stratospheric perturbation by wildfire smoke ever observed. The smoke originated from the record-breaking Australian fires in 2019–2020 and affects climate conditions and even the ozone layer in the Southern Hemisphere. The obvious link between dense smoke occurrence in the stratosphere and strong ozone depletion found in the Arctic and in the Antarctic in 2020 can be regarded as a new aspect of climate change.
Jiaoshi Zhang, Yang Wang, Steven Spielman, Susanne Hering, and Jian Wang
Atmos. Meas. Tech., 15, 2579–2590, https://doi.org/10.5194/amt-15-2579-2022, https://doi.org/10.5194/amt-15-2579-2022, 2022
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New nonparametric, regularized methods are developed to invert the growth factor probability density function (GF-PDF) from humidity-controlled fast integrated mobility spectrometer measurements. These algorithms are computationally efficient, require no prior assumptions of the GF-PDF distribution, and reduce the error in inverted GF-PDF. They can be applied to humidified tandem differential mobility analyzer data. Among all algorithms, Twomey’s method retrieves GF-PDF with the smallest error.
Daniel A. Knopf, Joseph C. Charnawskas, Peiwen Wang, Benny Wong, Jay M. Tomlin, Kevin A. Jankowski, Matthew Fraund, Daniel P. Veghte, Swarup China, Alexander Laskin, Ryan C. Moffet, Mary K. Gilles, Josephine Y. Aller, Matthew A. Marcus, Shira Raveh-Rubin, and Jian Wang
Atmos. Chem. Phys., 22, 5377–5398, https://doi.org/10.5194/acp-22-5377-2022, https://doi.org/10.5194/acp-22-5377-2022, 2022
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Marine boundary layer aerosols collected in the remote region of the eastern North Atlantic induce immersion freezing and deposition ice nucleation under typical mixed-phase and cirrus cloud conditions. Corresponding ice nucleation parameterizations for model applications have been derived. Chemical imaging of ambient aerosol and ice-nucleating particles demonstrates that the latter is dominated by sea salt and organics while also representing a major particle type in the particle population.
Jay M. Tomlin, Kevin A. Jankowski, Daniel P. Veghte, Swarup China, Peiwen Wang, Matthew Fraund, Johannes Weis, Guangjie Zheng, Yang Wang, Felipe Rivera-Adorno, Shira Raveh-Rubin, Daniel A. Knopf, Jian Wang, Mary K. Gilles, Ryan C. Moffet, and Alexander Laskin
Atmos. Chem. Phys., 21, 18123–18146, https://doi.org/10.5194/acp-21-18123-2021, https://doi.org/10.5194/acp-21-18123-2021, 2021
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Analysis of individual atmospheric particles shows that aerosol transported from North America during meteorological dry intrusion episodes may have a substantial impact on the mixing state and particle-type population over the mid-Atlantic, as organic contribution and particle-type diversity are significantly enhanced during these periods. These observations need to be considered in current atmospheric models.
Fan Mei, Steven Spielman, Susanne Hering, Jian Wang, Mikhail S. Pekour, Gregory Lewis, Beat Schmid, Jason Tomlinson, and Maynard Havlicek
Atmos. Meas. Tech., 14, 7329–7340, https://doi.org/10.5194/amt-14-7329-2021, https://doi.org/10.5194/amt-14-7329-2021, 2021
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This study focuses on understanding a versatile water-based condensation particle counter (vWCPC 3789) performance under various ambient pressure conditions (500–1000 hPa). A vWCPC has the advantage of avoiding health and safety concerns. However, its performance characterization under low pressure is rare but crucial for ensuring successful airborne deployment. This paper provides advanced knowledge of operating a vWCPC 3789 to capture the spatial variations of atmospheric aerosols.
Daniel A. Knopf and Markus Ammann
Atmos. Chem. Phys., 21, 15725–15753, https://doi.org/10.5194/acp-21-15725-2021, https://doi.org/10.5194/acp-21-15725-2021, 2021
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Adsorption on and desorption of gas molecules from solid or liquid surfaces or interfaces represent the initial interaction of gas-to-condensed-phase processes that can define the physicochemical evolution of the condensed phase. We apply a thermodynamic and microscopic treatment of these multiphase processes to evaluate how adsorption and desorption rates and surface accommodation depend on the choice of adsorption model and standard states with implications for desorption energy and lifetimes.
Fan Mei, Jian Wang, Shan Zhou, Qi Zhang, Sonya Collier, and Jianzhong Xu
Atmos. Chem. Phys., 21, 13019–13029, https://doi.org/10.5194/acp-21-13019-2021, https://doi.org/10.5194/acp-21-13019-2021, 2021
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This work focuses on understanding aerosol's ability to act as cloud condensation nuclei (CCN) and its variations with organic oxidation level and volatility using measurements at a rural site. Aerosol properties were examined from four air mass sources. The results help improve the accurate representation of aerosol from different ambient aerosol emissions, transformation pathways, and atmospheric processes in a climate model.
Jiaoshi Zhang, Steven Spielman, Yang Wang, Guangjie Zheng, Xianda Gong, Susanne Hering, and Jian Wang
Atmos. Meas. Tech., 14, 5625–5635, https://doi.org/10.5194/amt-14-5625-2021, https://doi.org/10.5194/amt-14-5625-2021, 2021
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In this study, we present a newly developed instrument, the humidity-controlled fast integrated mobility spectrometer (HFIMS), for fast measurements of aerosol hygroscopic growth. The HFIMS can measure the distributions of particle hygroscopic growth factors at six diameters from 35 to 265 nm under five RH levels from 20 to 85 % within 25 min. The HFIMS significantly advances our capability of characterizing the hygroscopic growth of atmospheric aerosols over a wide range of relative humidities.
Yang Wang, Guangjie Zheng, Michael P. Jensen, Daniel A. Knopf, Alexander Laskin, Alyssa A. Matthews, David Mechem, Fan Mei, Ryan Moffet, Arthur J. Sedlacek, John E. Shilling, Stephen Springston, Amy Sullivan, Jason Tomlinson, Daniel Veghte, Rodney Weber, Robert Wood, Maria A. Zawadowicz, and Jian Wang
Atmos. Chem. Phys., 21, 11079–11098, https://doi.org/10.5194/acp-21-11079-2021, https://doi.org/10.5194/acp-21-11079-2021, 2021
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This paper reports the vertical profiles of trace gas and aerosol properties over the eastern North Atlantic, a region of persistent but diverse subtropical marine boundary layer (MBL) clouds. We examined the key processes that drive the cloud condensation nuclei (CCN) population and how it varies with season and synoptic conditions. This study helps improve the model representation of the aerosol processes in the remote MBL, reducing the simulated aerosol indirect effects.
Albert Ansmann, Kevin Ohneiser, Rodanthi-Elisavet Mamouri, Daniel A. Knopf, Igor Veselovskii, Holger Baars, Ronny Engelmann, Andreas Foth, Cristofer Jimenez, Patric Seifert, and Boris Barja
Atmos. Chem. Phys., 21, 9779–9807, https://doi.org/10.5194/acp-21-9779-2021, https://doi.org/10.5194/acp-21-9779-2021, 2021
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We present retrievals of tropospheric and stratospheric height profiles of particle mass, volume, surface area concentration of wildfire smoke layers, and related cloud condensation nuclei (CCN) and ice-nucleating particle (INP) concentrations. The new analysis scheme is applied to ground-based lidar observations of stratospheric Australian smoke over southern South America and to spaceborne lidar observations of tropospheric North American smoke.
Richard H. Moore, Elizabeth B. Wiggins, Adam T. Ahern, Stephen Zimmerman, Lauren Montgomery, Pedro Campuzano Jost, Claire E. Robinson, Luke D. Ziemba, Edward L. Winstead, Bruce E. Anderson, Charles A. Brock, Matthew D. Brown, Gao Chen, Ewan C. Crosbie, Hongyu Guo, Jose L. Jimenez, Carolyn E. Jordan, Ming Lyu, Benjamin A. Nault, Nicholas E. Rothfuss, Kevin J. Sanchez, Melinda Schueneman, Taylor J. Shingler, Michael A. Shook, Kenneth L. Thornhill, Nicholas L. Wagner, and Jian Wang
Atmos. Meas. Tech., 14, 4517–4542, https://doi.org/10.5194/amt-14-4517-2021, https://doi.org/10.5194/amt-14-4517-2021, 2021
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Atmospheric particles are everywhere and exist in a range of sizes, from a few nanometers to hundreds of microns. Because particle size determines the behavior of chemical and physical processes, accurately measuring particle sizes is an important and integral part of atmospheric field measurements! Here, we discuss the performance of two commonly used particle sizers and how changes in particle composition and optical properties may result in sizing uncertainties, which we quantify.
Yue Zhou, Christopher P. West, Anusha P. S. Hettiyadura, Xiaoying Niu, Hui Wen, Jiecan Cui, Tenglong Shi, Wei Pu, Xin Wang, and Alexander Laskin
Atmos. Chem. Phys., 21, 8531–8555, https://doi.org/10.5194/acp-21-8531-2021, https://doi.org/10.5194/acp-21-8531-2021, 2021
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We present a comprehensive characterization of water-soluble organic carbon (WSOC) in seasonal snow of northwestern China. We applied complementary multimodal analytical techniques to investigate bulk and molecular-level composition, optical properties, and sources of WSOC. For the first time, we estimated the extent of radiative forcing due to WSOC in snow using a model simulation and showed the profound influences of WSOC on the energy budget of midlatitude seasonal snowpack.
Maria A. Zawadowicz, Kaitlyn Suski, Jiumeng Liu, Mikhail Pekour, Jerome Fast, Fan Mei, Arthur J. Sedlacek, Stephen Springston, Yang Wang, Rahul A. Zaveri, Robert Wood, Jian Wang, and John E. Shilling
Atmos. Chem. Phys., 21, 7983–8002, https://doi.org/10.5194/acp-21-7983-2021, https://doi.org/10.5194/acp-21-7983-2021, 2021
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This paper describes the results of a recent field campaign in the eastern North Atlantic, where two mass spectrometers were deployed aboard a research aircraft to measure the chemistry of aerosols and trace gases. Very clean conditions were found, dominated by local sulfate-rich acidic aerosol and very aged organics. Evidence of
long-range transport of aerosols from the continents was also identified.
Anna L. Hodshire, Emily Ramnarine, Ali Akherati, Matthew L. Alvarado, Delphine K. Farmer, Shantanu H. Jathar, Sonia M. Kreidenweis, Chantelle R. Lonsdale, Timothy B. Onasch, Stephen R. Springston, Jian Wang, Yang Wang, Lawrence I. Kleinman, Arthur J. Sedlacek III, and Jeffrey R. Pierce
Atmos. Chem. Phys., 21, 6839–6855, https://doi.org/10.5194/acp-21-6839-2021, https://doi.org/10.5194/acp-21-6839-2021, 2021
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Biomass burning emits particles and vapors that can impact both health and climate. Here, we investigate the role of dilution in the evolution of aerosol size and composition in observed US wildfire smoke plumes. Centers of plumes dilute more slowly than edges. We see differences in concentrations and composition between the centers and edges both in the first measurement and in subsequent measurements. Our findings support the hypothesis that plume dilution influences smoke aging.
Alexander Zaytsev, Martin Breitenlechner, Anna Novelli, Hendrik Fuchs, Daniel A. Knopf, Jesse H. Kroll, and Frank N. Keutsch
Atmos. Meas. Tech., 14, 2501–2513, https://doi.org/10.5194/amt-14-2501-2021, https://doi.org/10.5194/amt-14-2501-2021, 2021
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We have developed an online method for speciated measurements of organic peroxy radicals and stabilized Criegee intermediates using chemical derivatization combined with chemical ionization mass spectrometry. Chemical derivatization prevents secondary radical reactions and eliminates potential interferences. Comparison between our measurements and results from numeric modeling shows that the method can be used for the quantification of a wide range of atmospheric radicals and intermediates.
Israel Silber, Ann M. Fridlind, Johannes Verlinde, Andrew S. Ackerman, Grégory V. Cesana, and Daniel A. Knopf
Atmos. Chem. Phys., 21, 3949–3971, https://doi.org/10.5194/acp-21-3949-2021, https://doi.org/10.5194/acp-21-3949-2021, 2021
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Long-term ground-based radar and sounding measurements over Alaska (Antarctica) indicate that more than 85 % (75 %) of supercooled clouds are precipitating at cloud base and that 75 % (50 %) are precipitating to the surface. Such high prevalence is reconciled with lesser spaceborne estimates by considering radar sensitivity. Results provide a strong observational constraint for polar cloud processes in large-scale models.
Miguel Ricardo A. Hilario, Ewan Crosbie, Michael Shook, Jeffrey S. Reid, Maria Obiminda L. Cambaliza, James Bernard B. Simpas, Luke Ziemba, Joshua P. DiGangi, Glenn S. Diskin, Phu Nguyen, F. Joseph Turk, Edward Winstead, Claire E. Robinson, Jian Wang, Jiaoshi Zhang, Yang Wang, Subin Yoon, James Flynn, Sergio L. Alvarez, Ali Behrangi, and Armin Sorooshian
Atmos. Chem. Phys., 21, 3777–3802, https://doi.org/10.5194/acp-21-3777-2021, https://doi.org/10.5194/acp-21-3777-2021, 2021
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This study characterizes long-range transport from major Asian pollution sources into the tropical northwest Pacific and the impact of scavenging on these air masses. We combined aircraft observations, HYSPLIT trajectories, reanalysis, and satellite retrievals to reveal distinct composition and size distribution profiles associated with specific emission sources and wet scavenging. The results of this work have implications for international policymaking related to climate and health.
Zhibo Zhang, Qianqian Song, David B. Mechem, Vincent E. Larson, Jian Wang, Yangang Liu, Mikael K. Witte, Xiquan Dong, and Peng Wu
Atmos. Chem. Phys., 21, 3103–3121, https://doi.org/10.5194/acp-21-3103-2021, https://doi.org/10.5194/acp-21-3103-2021, 2021
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This study investigates the small-scale variations and covariations of cloud microphysical properties, namely, cloud liquid water content and cloud droplet number concentration, in marine boundary layer clouds based on in situ observation from the Aerosol and Cloud Experiments in the Eastern North Atlantic (ACE-ENA) campaign. We discuss the dependence of cloud variations on vertical location in cloud and the implications for warm-rain simulations in the global climate models.
Demetrios Pagonis, Pedro Campuzano-Jost, Hongyu Guo, Douglas A. Day, Melinda K. Schueneman, Wyatt L. Brown, Benjamin A. Nault, Harald Stark, Kyla Siemens, Alex Laskin, Felix Piel, Laura Tomsche, Armin Wisthaler, Matthew M. Coggon, Georgios I. Gkatzelis, Hannah S. Halliday, Jordan E. Krechmer, Richard H. Moore, David S. Thomson, Carsten Warneke, Elizabeth B. Wiggins, and Jose L. Jimenez
Atmos. Meas. Tech., 14, 1545–1559, https://doi.org/10.5194/amt-14-1545-2021, https://doi.org/10.5194/amt-14-1545-2021, 2021
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We describe the airborne deployment of an extractive electrospray time-of-flight mass spectrometer (EESI-MS). The instrument provides a quantitative 1 Hz measurement of the chemical composition of organic aerosol up to altitudes of
7 km, with single-compound detection limits as low as 50 ng per standard cubic meter.
Ana C. Morales, Thilina Jayarathne, Jonathan H. Slade, Alexander Laskin, and Paul B. Shepson
Atmos. Chem. Phys., 21, 129–145, https://doi.org/10.5194/acp-21-129-2021, https://doi.org/10.5194/acp-21-129-2021, 2021
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Organic nitrates formed from the oxidation of biogenic volatile organic compounds impact both ozone and particulate matter as they remove nitrogen oxides, but they represent important aerosol precursors. We conducted a series of reaction chamber experiments that quantified the total organic nitrate and secondary organic aerosol yield from the OH-radical-initiated oxidation of ocimene, and also measured their hydrolysis lifetimes in the aqueous phase, as a function of pH.
Gourihar Kulkarni, Naruki Hiranuma, Ottmar Möhler, Kristina Höhler, Swarup China, Daniel J. Cziczo, and Paul J. DeMott
Atmos. Meas. Tech., 13, 6631–6643, https://doi.org/10.5194/amt-13-6631-2020, https://doi.org/10.5194/amt-13-6631-2020, 2020
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This study presents a new continuous-flow-diffusion-chamber-style operated ice chamber (Modified Compact Ice Chamber, MCIC) to measure the immersion-freezing efficiency of atmospheric particles. MCIC allowed us to obtain maximum droplet-freezing efficiency at higher time resolution without droplet breakthrough ambiguity. Its evaluation was performed by reproducing published data from the recent ice nucleation workshop and past laboratory data for standard and airborne ice-nucleating particles.
Lawrence I. Kleinman, Arthur J. Sedlacek III, Kouji Adachi, Peter R. Buseck, Sonya Collier, Manvendra K. Dubey, Anna L. Hodshire, Ernie Lewis, Timothy B. Onasch, Jeffery R. Pierce, John Shilling, Stephen R. Springston, Jian Wang, Qi Zhang, Shan Zhou, and Robert J. Yokelson
Atmos. Chem. Phys., 20, 13319–13341, https://doi.org/10.5194/acp-20-13319-2020, https://doi.org/10.5194/acp-20-13319-2020, 2020
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Aerosols from wildfires affect the Earth's temperature by absorbing light or reflecting it back into space. This study investigates time-dependent chemical, microphysical, and optical properties of aerosols generated by wildfires in the Pacific Northwest, USA. Wildfire smoke plumes were traversed by an instrumented aircraft at locations near the fire and up to 3.5 h travel time downwind. Although there was no net aerosol production, aerosol particles grew and became more efficient scatters.
Guangjie Zheng, Chongai Kuang, Janek Uin, Thomas Watson, and Jian Wang
Atmos. Chem. Phys., 20, 12515–12525, https://doi.org/10.5194/acp-20-12515-2020, https://doi.org/10.5194/acp-20-12515-2020, 2020
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Condensational growth of Aitken-mode particles is a major source of cloud condensation nuclei in the remote marine boundary layer. It has been long thought that over remote oceans, condensation growth is dominated by sulfate that derives from ocean-emitted dimethyl sulfide. In this study, we present the first long-term observational evidence that, contrary to conventional thinking, organics play an even more important role than sulfate in particle growth over remote oceans throughout the year.
Matthew Fraund, Daniel J. Bonanno, Swarup China, Don Q. Pham, Daniel Veghte, Johannes Weis, Gourihar Kulkarni, Ken Teske, Mary K. Gilles, Alexander Laskin, and Ryan C. Moffet
Atmos. Chem. Phys., 20, 11593–11606, https://doi.org/10.5194/acp-20-11593-2020, https://doi.org/10.5194/acp-20-11593-2020, 2020
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High viscosity organic particles (HVOPs) in the Southern Great Plains have been analyzed, and two particle types were found. Previously studied tar balls and the recently discovered airborne soil organic particles (ASOPs) are both shown to be brown carbon (BrC). These particle types can be identified in bulk by an absorption Ångström exponent approaching 2.6. HVOP types can be differentiated by comparing carbon absorption spectrum peak ratios between the carboxylic acid, alcohol, and sp2 peaks.
Cited articles
Aller, J. Y., Radway, J. C., Kilthau, W. P., Bothe, D. W., Wilson, T. W.,
Vaillancourt, R. D., Quinn, P. K., Coffman, D. J., Murray, B. J., and Knopf,
D. A.: Size-resolved characterization of the polysaccharidic and
proteinaceous components of sea spray aerosol, Atmos. Environ., 154,
331–347, https://doi.org/10.1016/j.atmosenv.2017.01.053, 2017.
Alonso-Perez, S., Cuevas, E., Querol, X., Guerra, J. C., and Perez, C.:
African dust source regions for observed dust outbreaks over the Subtropical
Eastern North Atlantic region, above 25∘ N, J. Arid. Environ., 78,
100–109, https://doi.org/10.1016/j.jaridenv.2011.11.013, 2012.
Alpert, P. A. and Knopf, D. A.: Analysis of isothermal and cooling-rate-dependent immersion freezing by a unifying stochastic ice nucleation model, Atmos. Chem. Phys., 16, 2083–2107, https://doi.org/10.5194/acp-16-2083-2016, 2016.
Alpert, P. A., Aller, J. Y., and Knopf, D. A.: Ice nucleation from aqueous NaCl droplets with and without marine diatoms, Atmos. Chem. Phys., 11, 5539–5555, https://doi.org/10.5194/acp-11-5539-2011, 2011a.
Alpert, P. A., Aller, J. Y., and Knopf, D. A.: Initiation of the ice phase
by marine biogenic surfaces in supersaturated gas and supercooled aqueous
phases, Phys. Chem. Chem. Phys., 13, 19882–19894, https://doi.org/10.1039/C1CP21844A, 2011b.
Alpert, P. A., Kilthau, W. P., Bothe, D. W., Radway, J. C., Aller, J. Y.,
and Knopf, D. A.: The influence of marine microbial activities on aerosol
production: A laboratory mesocosm study, J. Geophys. Res.-Atmos., 120,
8841–8860, https://doi.org/10.1002/2015jd023469, 2015.
Alpert, P. A., Kilthau, W. P., O'Brien, R. E., Moffet, R. C., Gilles, M. K.,
Wang, B., Laskin, A., Aller, J. Y., and Knopf, D. A.: Ice-nucleating agents
in sea spray aerosol identified and quantified with a holistic multi-modal
freezing model, Sci. Adv., 8, eabq6842, https://doi.org/10.1126/sciadv.abq6842, 2022.
Ault, A. P., Moffet, R. C., Baltrusaitis, J., Collins, D. B., Ruppel, M. J.,
Cuadra-Rodriguez, L. A., Zhao, D., Guasco, T. L., Ebben, C. J., Geiger, F.
M., Bertram, T. H., Prather, K. A., and Grassian, V. H.: Size-Dependent
Changes in Sea Spray Aerosol Composition and Properties with Different
Seawater Conditions, Environ. Sci. Technol., 47, 5603–5612,
https://doi.org/10.1021/es400416g, 2013.
Baker, M. B.: Cloud microphysics and climate, Science, 276, 1072–1078, 1997.
Berkemeier, T., Shiraiwa, M., Pöschl, U., and Koop, T.: Competition between water uptake and ice nucleation by glassy organic aerosol particles, Atmos. Chem. Phys., 14, 12513–12531, https://doi.org/10.5194/acp-14-12513-2014, 2014.
Boucher, O., Randall, D., Artaxo, P., Bretherton, C., Feingold, G., Forster,
P., Kerminen, V.-M., Kondo, Y., Liao, H., Lohmann, U., Rasch, P., Satheesh,
S. K., Sherwood, S., Stevens, B., and Zhang, X. Y.: Clouds and Aerosols, in:
Climate Change 2013: The Physical Science Basis, Contribution of Working
Group I to the Fifth Assessment Report of the Intergovernmental Panel on
Climate Change, edited by: Stocker, T. F., Qin, D., Plattner, G.-K., Tignor,
M., Allen, S. K., Boschung, J., Nauels, A., Xia, Y., Bex, V., and Midgley,
P. M., Cambridge University Press, Cambridge, United Kingdom and New York,
NY, USA, ISBN 978-1-107-05799-1, 2013.
Cantrell, W. and Heymsfield, A.: Production of ice in tropospheric clouds –
A review, B. Am. Meteorol. Soc., 86, 795–807, https://doi.org/10.1175/bams-86-6-795,
2005.
Charnawskas, J. C., Alpert, P. A., Lambe, A. T., Berkemeier, T., O'Brien, R.
E., Massoli, P., Onasch, T. B., Shiraiwa, M., Moffet, R. C., Gilles, M. K.,
Davidovits, P., Worsnop, D. R., and Knopf, D. A.: Condensed-phase
biogenic-anthropogenic interactions with implications for cold cloud
formation, Faraday Discuss., 200, 164–195, https://doi.org/10.1039/C7FD00010C, 2017.
China, S., Alpert, P. A., Zhang, B., Schum, S., Dzepina, K., Wright, K.,
Owen, R. C., Fialho, P., Mazzoleni, L. R., Mazzoleni, C., and Knopf, D. A.:
Ice cloud formation potential by free tropospheric particles from long-range
transport over the Northern Atlantic Ocean, J. Geophys. Res., 122,
3065–3079, https://doi.org/10.1002/2016jd025817, 2017.
Cochran, R. E., Ryder, O. S., Grassian, V. H., and Prather, K. A.: Sea Spray
Aerosol: The Chemical Link between the Oceans, Atmosphere, and Climate,
Accounts Chem. Res., 50, 599–604, https://doi.org/10.1021/acs.accounts.6b00603, 2017.
Connolly, P. J., Möhler, O., Field, P. R., Saathoff, H., Burgess, R., Choularton, T., and Gallagher, M.: Studies of heterogeneous freezing by three different desert dust samples, Atmos. Chem. Phys., 9, 2805–2824, https://doi.org/10.5194/acp-9-2805-2009, 2009.
Cornwell, G. C., McCluskey, C. S., DeMott, P. J., Prather, K. A., and
Burrows, S. M.: Development of Heterogeneous Ice Nucleation Rate Coefficient
Parameterizations From Ambient Measurements, Geophys. Res. Lett., 48, 10,
https://doi.org/10.1029/2021gl095359, 2021.
Cornwell, G. C., McCluskey, C. S., Levin, E. J. T., Suski, K. J., DeMott, P.
J., Kreidenweis, S. M., and Prather, K. A.: Direct Online Mass Spectrometry
Measurements of Ice Nucleating Particles at a California Coastal Site, J.
Geophys. Res.-Atmos., 124, 12157–12172, https://doi.org/10.1029/2019jd030466, 2019.
Creamean, J. M., Hill, T. C. J., DeMott, P. J., Uetake, J., Kreidenweis, S.,
and Douglas, T. A.: Thawing permafrost: an overlooked source of seeds for
Arctic cloud formation, Environ. Res. Lett., 15, 9,
https://doi.org/10.1088/1748-9326/ab87d3, 2020.
Creamean, J. M., Cross, J. N., Pickart, R., McRaven, L., Lin, P., Pacini,
A., Hanlon, R., Schmale, D. G., Ceniceros, J., Aydell, T., Colombi, N.,
Bolger, E., and DeMott, P. J.: Ice Nucleating Particles Carried From Below a
Phytoplankton Bloom to the Arctic Atmosphere, Geophys. Res. Lett., 46,
8572–8581, https://doi.org/10.1029/2019gl083039, 2019.
Cziczo, D. J., Ladino, L. A., Boose, Y., Kanji, Z. A., Kupiskewski, P.,
Lance, S., Mertes, S., and Wex, H.: Measurements of Ice Nucleating Particles
and Ice Residuals, Meteorol. Monogr., 58, 1–13,
https://doi.org/10.1175/amsmonographs-d-16-0008.1, 2017.
David, R. O., Marcolli, C., Fahrni, J., Qiu, Y., Perez Sirkin, Y. A.,
Molinero, V., Mahrt, F., Brühwiler, D., Lohmann, U., and Kanji, Z. A.:
Pore condensation and freezing is responsible for ice formation below water
saturation for porous particles, P. Natl. Acad. Sci. USA, 116, 8184–8189, https://doi.org/10.1073/pnas.1813647116, 2019.
DeMott, P. J., Prenni, A. J., Liu, X., Kreidenweis, S. M., Petters, M. D.,
Twohy, C. H., Richardson, M. S., Eidhammer, T., and Rogers, D. C.:
Predicting global atmospheric ice nuclei distributions and their impacts on
climate, P. Natl. Acad. Sci. USA, 107, 11217–11222,
https://doi.org/10.1073/pnas.0910818107, 2010.
DeMott, P. J., Hill, T. C. J., McCluskey, C. S., Prather, K. A., Collins, D.
B., Sullivan, R. C., Ruppel, M. J., Mason, R. H., Irish, V. E., Lee, T.,
Hwang, C. Y., Rhee, T. S., Snider, J. R., McMeeking, G. R., Dhaniyala, S.,
Lewis, E. R., Wentzell, J. J. B., Abbatt, J., Lee, C., Sultana, C. M., Ault,
A. P., Axson, J. L., Martinez, M. D., Venero, I., Santos-Figueroa, G.,
Stokes, M. D., Deane, G. B., Mayol-Bracero, O. L., Grassian, V. H., Bertram,
T. H., Bertram, A. K., Moffett, B. F., and Franc, G. D.: Sea spray aerosol
as a unique source of ice nucleating particles, P. Natl. Acad. Sci. USA, 113, 5797–5803, https://doi.org/10.1073/pnas.1514034112, 2016.
Facchini, M. C. and O'Dowd, C. D.: Biogenic origin of primary and secondary
organic components in marine aerosol, Geochim. Cosmochim. Ac., 73, A348,
2009.
Fraund, M., Park, T., Yao, L., Bonanno, D., Pham, D. Q., and Moffet, R. C.: Quantitative capabilities of STXM to measure spatially resolved organic volume fractions of mixed organic/inorganic particles, Atmos. Meas. Tech., 12, 1619–1633, https://doi.org/10.5194/amt-12-1619-2019, 2019.
Fraund, M., Bonanno, D. J., China, S., Pham, D. Q., Veghte, D., Weis, J., Kulkarni, G., Teske, K., Gilles, M. K., Laskin, A., and Moffet, R. C.: Optical properties and composition of viscous organic particles found in the Southern Great Plains, Atmos. Chem. Phys., 20, 11593–11606, https://doi.org/10.5194/acp-20-11593-2020, 2020.
Hill, T. C. J., DeMott, P. J., Tobo, Y., Fröhlich-Nowoisky, J., Moffett, B. F., Franc, G. D., and Kreidenweis, S. M.: Sources of organic ice nucleating particles in soils, Atmos. Chem. Phys., 16, 7195–7211, https://doi.org/10.5194/acp-16-7195-2016, 2016.
Hiranuma, N., Brooks, S. D., Moffet, R. C., Glen, A., Laskin, A., Gilles, M.
K., Liu, P., Macdonald, A. M., Strapp, J. W., and McFarquhar, G. M.:
Chemical characterization of individual particles and residuals of cloud
droplets and ice crystals collected on board research aircraft in the ISDAC
2008 study, J. Geophys. Res., 118, 6564–6579, https://doi.org/10.1002/jgrd.50484, 2013.
Hopkins, R. J., Tivanski, A. V., Marten, B. D., and Gilles, M. K.: Chemical
bonding and structure of black carbon reference materials and individual
carbonaceous atmospheric aerosols, J. Aerosol Sci., 38, 573–591,
https://doi.org/10.1016/j.jaerosci.2007.03.009, 2007.
Ilotoviz, E., Ghate, V. P., and Raveh-Rubin, S.: The Impact of Slantwise
Descending Dry Intrusions on the Marine Boundary Layer and Air-Sea Interface
Over the ARM Eastern North Atlantic Site, J. Geophys. Res.-Atmos., 126, 24,
https://doi.org/10.1029/2020jd033879, 2021.
Irish, V. E., Hanna, S. J., Willis, M. D., China, S., Thomas, J. L., Wentzell, J. J. B., Cirisan, A., Si, M., Leaitch, W. R., Murphy, J. G., Abbatt, J. P. D., Laskin, A., Girard, E., and Bertram, A. K.: Ice nucleating particles in the marine boundary layer in the Canadian Arctic during summer 2014, Atmos. Chem. Phys., 19, 1027–1039, https://doi.org/10.5194/acp-19-1027-2019, 2019.
Kanji, Z. A., Ladino, L. A., Wex, H., Boose, Y., Burkert-Kohn, M., Cziczo,
D. J., and Krämer, M.: Overview of Ice Nucleating Particles, in: Ice
Formation and evolution in Clouds and Precipitation: Measurement and
Modeling Challenges, Meteorological Monographs, Am. Meteorol. Soc., 1–33, https://doi.org/10.1175/AMSMONOGRAPHS-D-16-0006.1, 2017.
Kilcoyne, A. L. D., Tyliszczak, T., Steele, W. F., Fakra, S., Hitchcock, P.,
Franck, K., Anderson, E., Harteneck, B., Rightor, E. G., Mitchell, G. E.,
Hitchcock, A. P., Yang, L., Warwick, T., and Ade, H.:
Interferometer-controlled scanning transmission X-ray microscopes at the
Advanced Light Source, J. Synchrotron Radiat., 10, 125–136, 2003.
Knopf, D. A.: Microanalysis Techniques to Study Atmospheric Ice Nucleation
and Ice Crystal Growth, in: Microanalysis and Atmospheric Particles:
Techniques and Applications in Climate Change and Air Quality, edited by:
Conny, J. M., John Wiley & Sons, Hoboken, NJ, ESS Open Archive [preprint], https://doi.org/10.22541/essoar.169089365.50240296/v1, 2023.
Knopf, D. A. and Alpert, P. A.: A water activity based model of
heterogeneous ice nucleation kinetics for freezing of water and aqueous
solution droplets, Faraday Discuss., 165, 513–534, https://doi.org/10.1039/C3FD00035D, 2013.
Knopf, D. A. and Alpert, P. A.: Atmospheric ice nucleation, Nat. Rev. Phys.,
https://doi.org/10.1038/s42254-023-00570-7, 2023.
Knopf, D. A., Alpert, P. A., and Wang, B.: The Role of Organic Aerosol in
Atmospheric Ice Nucleation: A Review, ACS Earth Space Chem., 2, 168–202,
https://doi.org/10.1021/acsearthspacechem.7b00120, 2018.
Knopf, D. A., Alpert, P. A., Wang, B., and Aller, J. Y.: Stimulation of ice
nucleation by marine diatoms, Nat. Geosci., 4, 88–90, https://doi.org/10.1038/ngeo1037,
2011.
Knopf, D. A., Wang, B., Laskin, A., Moffet, R. C., and Gilles, M. K.:
Heterogeneous nucleation of ice on anthropogenic organic particles collected
in Mexico City, Geophys. Res. Lett., 37, L11803, https://doi.org/10.1029/2010GL043362, 2010.
Knopf, D. A., Alpert, P. A., Wang, B., O'Brien, R. E., Kelly, S. T., Laskin,
A., Gilles, M. K., and Moffet, R. C.: Microspectroscopic imaging and
characterization of individually identified ice nucleating particles from a
case field study, J. Geophys. Res., 119, 10365–10381, https://doi.org/10.1002/2014JD021866,
2014.
Knopf, D. A., Alpert, P. A., Zipori, A., Reicher, N., and Rudich, Y.:
Stochastic nucleation processes and substrate abundance explain
time-dependent freezing in supercooled droplets, npj Clim. Atmos. Sci., 3,
1–9, https://doi.org/10.1038/s41612-020-0106-4, 2020.
Knopf, D. A., Barry, K. R., Brubaker, T. A., Jahl, L. G., Jankowski, K. A.,
Li, J., Lu, Y., Monroe, L. W., Moore, K. A., Rivera-Adorno, F. A., Sauceda,
K. A., Shi, Y., Tomlin, J. M., Vepuri, H. S. K., Wang, P., Lata, N. N.,
Levin, E. J. T., Creamean, J. M., Hill, T. C. J., China, S., Alpert, P. A.,
Moffet, R. C., Hiranuma, N., Sullivan, R. C., Fridlind, A. M., West, M.,
Laskin, A., DeMott, P. J., and Liu, X.: Aerosol–Ice Formation Closure: A
Southern Great Plains Field Campaign, B. Am. Meteorol. Soc., 102,
1952–1971, https://doi.org/10.1175/BAMS-D-20-0151.1, 2021.
Knopf, D. A., Charnawskas, J. C., Wang, P., Wong, B., Tomlin, J. M., Jankowski, K. A., Fraund, M., Veghte, D. P., China, S., Laskin, A., Moffet, R. C., Gilles, M. K., Aller, J. Y., Marcus, M. A., Raveh-Rubin, S., and Wang, J.: Micro-spectroscopic and freezing characterization of ice-nucleating particles collected in the marine boundary layer in the eastern North Atlantic, Atmos. Chem. Phys., 22, 5377–5398, https://doi.org/10.5194/acp-22-5377-2022, 2022.
Knopf, D. A., Wang, P., Wong, B., Tomlin, J. M., Veghte, D. P., Lata, N. N., China, S., Laskin, A., Moffet, R. C., Aller, J. Y., Marcus, M. A., and Wang, J.: Physicochemical characterization of free troposphere and marine boundary layer ice-nucleating particles collected by aircraft in the eastern North Atlantic, Zenodo [data set], https://doi.org/10.5281/zenodo.8198153, 2023.
Koop, T.: Homogeneous ice nucleation in water and aqueous solutions, Phys. Chem. Chem. Phys., 218, 1231–1258, 2004.
Koop, T. and Zobrist, B.: Parameterizations for ice nucleation in biological
and atmospheric systems, Phys. Chem. Chem. Phys., 11, 10839–10850, https://doi.org/10.1039/B914289d, 2009.
Koop, T., Luo, B. P., Tsias, A., and Peter, T.: Water activity as the
determinant for homogeneous ice nucleation in aqueous solutions, Nature,
406, 611–614, https://doi.org/10.1038/35020537, 2000.
Koop, T., Bookhold, J., Shiraiwa, M., and Pöschl, U.: Glass transition
and phase state of organic compounds: dependency on molecular properties and
implications for secondary organic aerosols in the atmosphere, Phys. Chem.
Chem. Phys., 13, 19238–19255, https://doi.org/10.1039/c1cp22617g, 2011.
Ladino, L. A., Yakobi-Hancock, J. D., Kilthau, W. P., Mason, R. H., Si, M.,
Li, J., Miller, L. A., Schiller, C. L., Huffman, J. A., Aller, J. Y., Knopf,
D. A., Bertram, A. K., and Abbatt, J. P. D.: Addressing the ice nucleating
abilities of marine aerosol: A combination of deposition mode laboratory and
field measurements, Atmos. Environ., 132, 1–10,
https://doi.org/10.1016/j.atmosenv.2016.02.028, 2016.
Laskin, A., Iedema, M. J., and Cowin, J. P.: Time-resolved aerosol collector
for CCSEM/EDX single-particle analysis, Aerosol Sci. Tech., 37, 246–260,
https://doi.org/10.1080/02786820300945, 2003.
Laskin, A., Cowin, J. P., and Iedema, M. J.: Analysis of individual
environmental particles using modern methods of electron microscopy and
X-ray microanalysis, J. Electron Spectrosc., 150, 260–274,
https://doi.org/10.1016/j.elspec.2005.06.008, 2006.
Laskin, A., Moffet, R. C., Gilles, M. K., Fast, J. D., Zaveri, R. A., Wang,
B. B., Nigge, P., and Shutthanandan, J.: Tropospheric chemistry of
internally mixed sea salt and organic particles: Surprising reactivity of
NaCl with weak organic acids, J. Geophys. Res., 117, D15302,
https://doi.org/10.1029/2012jd017743, 2012.
Laskin, A., Gilles, M. K., Knopf, D. A., Wang, B. B., and China, S.:
Progress in the Analysis of Complex Atmospheric Particles, Annu. Rev. Anal.
Chem., 9, 117–143, https://doi.org/10.1146/annurev-anchem-071015-041521, 2016.
Laskin, A., Moffet, R. C., and Gilles, M. K.: Chemical Imaging of
Atmospheric Particles, Accounts Chem. Res., 52, 3419–3431,
https://doi.org/10.1021/acs.accounts.9b00396, 2019.
Lata, N. N., Zhang, B., Schum, S., Mazzoleni, L., Brimberry, R., Marcus, M.
A., Cantrell, W. H., Fialho, P., Mazzoleni, C., and China, S.: Aerosol
Composition, Mixing State, and Phase State of Free Tropospheric Particles
and Their Role in Ice Cloud Formation, ACS Earth Space Chem., 5, 3499–3510,
https://doi.org/10.1021/acsearthspacechem.1c00315, 2021.
Laurila, T. K., Sinclair, V. A., and Gregow, H.: Climatology, variability,
and trends in near-surface wind speeds over the North Atlantic and Europe
during 1979-2018 based on ERA5, Int. J. Climatol., 41,
2253–2278, https://doi.org/10.1002/joc.6957, 2021.
Lee, H. D., Morris, H. S., Laskina, O., Sultana, C. M., Lee, C., Jayarathne,
T., Cox, J. L., Wang, X. F., Hasenecz, E. S., DeMott, P. J., Bertram, T. H.,
Cappa, C. D., Stone, E. A., Prather, K. A., Grassian, V. H., and Tivanski,
A. V.: Organic Enrichment, Physical Phase State, and Surface Tension
Depression of Nascent Core-Shell Sea Spray Aerosols during Two Phytoplankton
Blooms, ACS Earth Space Chem., 4, 650–660,
https://doi.org/10.1021/acsearthspacechem.0c00032, 2020.
Li, J. N. and Knopf, D. A.: Representation of Multiphase OH Oxidation of
Amorphous Organic Aerosol for Tropospheric Conditions, Environ. Sci.
Technol., 55, 7266–7275, https://doi.org/10.1021/acs.est.0c07668, 2021.
Marcolli, C.: Deposition nucleation viewed as homogeneous or immersion freezing in pores and cavities, Atmos. Chem. Phys., 14, 2071–2104, https://doi.org/10.5194/acp-14-2071-2014, 2014.
Marcolli, C.: Technical note: Fundamental aspects of ice nucleation via pore condensation and freezing including Laplace pressure and growth into macroscopic ice, Atmos. Chem. Phys., 20, 3209–3230, https://doi.org/10.5194/acp-20-3209-2020, 2020.
McCluskey, C. S., Hill, T. C. J., Malfatti, F., Sultana, C. M., Lee, C.,
Santander, M. V., Beall, C. M., Moore, K. A., Cornwell, G. C., Collins, D.
B., Prather, K. A., Jayarathne, T., Stone, E. A., Azam, F., Kreidenweis, S.
M., and DeMott, P. J.: A Dynamic Link between Ice Nucleating Particles
Released in Nascent Sea Spray Aerosol and Oceanic Biological Activity during
Two Mesocosm Experiments, J. Atmos. Sci., 74, 151–166,
https://doi.org/10.1175/jas-d-16-0087.1, 2017.
McCluskey, C. S., Hill, T. C. J., Sultana, C. M., Laskina, O., Trueblood,
J., Santander, M. V., Beall, C. M., Michaud, J. M., Kreidenweis, S. M.,
Prather, K. A., Grassian, V., and DeMott, P. J.: A Mesocosm Double Feature:
Insights into the Chemical Makeup of Marine Ice Nucleating Particles, J.
Atmos. Sci., 75, 2405–2423, https://doi.org/10.1175/jas-d-17-0155.1, 2018.
McCoy, D. T., Field, P., Gordon, H., Elsaesser, G. S., and Grosvenor, D. P.: Untangling causality in midlatitude aerosol–cloud adjustments, Atmos. Chem. Phys., 20, 4085–4103, https://doi.org/10.5194/acp-20-4085-2020, 2020.
McCoy, D. T., Field, P., Frazer, M. E., Zelinka, M. D., Elsaesser, G. S.,
Mulmenstadt, J., Tan, I., Myers, T. A., and Lebo, Z. J.: Extratropical
Shortwave Cloud Feedbacks in the Context of the Global Circulation and
Hydrological Cycle, Geophys. Res. Lett., 49, 11, https://doi.org/10.1029/2021gl097154, 2022.
Moffet, R. C., Tivanski, A. V., and Gilles, M. K.: Scanning X-ray
Transmission Microscopy: Applications in Atmospheric Aerosol Research, in:
Fundamentals and Applications in Aerosol Spectroscopy, edited by: Signorell,
R. and Reid, J. P., Taylor and Francis Books, Inc., 419–462, 2010a.
Moffet, R. C., Henn, T., Laskin, A., and Gilles, M. K.:
Automated Chemical Analysis of Internally Mixed
Aerosol Particles Using X-ray Spectromicroscopy at
the Carbon K-Edge, Anal. Chem., 82, 7906–7914,
https://doi.org/10.1021/ac1012909, 2010b (data available
at: https://www.mathworks.com/matlabcentral/fileexchange/29085-stxm-spectromicroscopy-particle-analysis-routines, last
access: 23 July 2023).
Moffet, R. C., Rödel, T. C., Kelly, S. T., Yu, X. Y., Carroll, G. T., Fast, J., Zaveri, R. A., Laskin, A., and Gilles, M. K.: Spectro-microscopic measurements of carbonaceous aerosol aging in Central California, Atmos. Chem. Phys., 13, 10445–10459, https://doi.org/10.5194/acp-13-10445-2013, 2013.
Mülmenstädt, J., Sourdeval, O., Delanoe, J., and Quaas, J.:
Frequency of occurrence of rain from liquid-, mixed-, and ice-phase clouds
derived from A-Train satellite retrievals, Geophys. Res. Lett., 42,
6502–6509, https://doi.org/10.1002/2015gl064604, 2015.
Mülmenstädt, J., Salzmann, M., Kay, J. E., Zelinka, M. D., Ma, P.
L., Nam, C., Kretzschmar, J., Hornig, S., and Quaas, J.: An underestimated
negative cloud feedback from cloud lifetime changes, Nat. Clim. Change,
11, 508–513, https://doi.org/10.1038/s41558-021-01038-1, 2021.
Murray, B. J. and Liu, X.: Ice-nucleating particles and their effects on
clouds and radiation, in: Aerosols and Climate, edited by: Carslaw, K. S.,
Elsevier, Amsterdam, Netherlands, 619–649,
https://doi.org/10.1016/B978-0-12-819766-0.00014-6, 2022.
Murray, B. J., O'Sullivan, D., Atkinson, J. D., and Webb, M. E.: Ice
nucleation by particles immersed in supercooled cloud droplets, Chem. Soc.
Rev., 41, 6519–6554, https://doi.org/10.1039/c2cs35200a, 2012.
Niemand, M., Möhler, O., Vogel, B., Vogel, H., Hoose, C., Connolly, P.,
Klein, H., Bingemer, H., DeMott, P., Skrotzki, J., and Leisner, T.: A
Particle-Surface-Area-Based Parameterization of Immersion Freezing on Desert
Dust Particles, J. Atmos. Sci., 69, 3077–3092, https://doi.org/10.1175/jas-d-11-0249.1,
2012.
O'Dowd, C. D., Facchini, M. C., Cavalli, F., Ceburnis, D., Mircea, M.,
Decesari, S., Fuzzi, S., Yoon, Y. J., and Putaud, J. P.: Biogenically driven
organic contribution to marine aerosol, Nature, 431, 676–680,
https://doi.org/10.1038/nature02959, 2004.
Peter, T., Marcolli, C., Spichtinger, P., Corti, T., Baker, M. B., and Koop,
T.: When dry air is too humid, Science, 314, 1399–1402,
https://doi.org/10.1126/science.1135199, 2006.
Pham, D. Q., O'Brien, R., Fraund, M., Bonanno, D., Laskina, O., Beall, C.,
Moore, K. A., Forestieri, S., Wang, X., Lee, C., Sultana, C., Grassian, V.,
Cappa, C. D., Prather, K. A., and Moffet, R. C.: Biological Impacts on
Carbon Speciation and Morphology of Sea Spray Aerosol, ACS Earth Space
Chem., 1, 551–561, https://doi.org/10.1021/acsearthspacechem.7b00069, 2017.
Pruppacher, H. R. and Klett, J. D.: Microphysics of Clouds and
Precipitation, Kluwer Academic Publishers, Dordrecht, ISBN 0-7923-4409-X, 1997.
Raveh-Rubin, S.: Dry Intrusions: Lagrangian Climatology and Dynamical Impact
on the Planetary Boundary Layer, J. Climate, 30, 6661–6682,
https://doi.org/10.1175/jcli-d-16-0782.1, 2017.
Rigg, Y. J., Alpert, P. A., and Knopf, D. A.: Immersion freezing of water and aqueous ammonium sulfate droplets initiated by humic-like substances as a function of water activity, Atmos. Chem. Phys., 13, 6603–6622, https://doi.org/10.5194/acp-13-6603-2013, 2013.
Schnell, R. C.: Ice nuclei produced by laboratory cultured marine
phytoplankton, Geophys. Res. Lett., 2, 500–502, 1975.
Schnell, R. C. and Vali, G.: Biogenic Ice Nuclei: Part I. Terrestrial and
Marine Sources, J. Atmos. Sci., 33, 1554–1564, 1976.
Shiraiwa, M., Ammann, M., Koop, T., and Pöschl, U.: Gas uptake and chemical
aging of semisolid organic aerosol particles, P. Natl. Acad. Sci. USA, 108, 11003–11008, https://doi.org/10.1073/pnas.1103045108, 2011.
Stein, A. F., Draxler, R. R., Rolph, G. D., Stunder, B. J. B., Cohen, M. D.,
and Ngan, F.: NOAA's HYSPLIT atmospheric transport and dispersion modeling
system, B. Am. Meteorol. Soc., 96, 2059–2077,
https://doi.org/10.1175/bams-d-14-00110.1, 2015.
Storelvmo, T.: Aerosol Effects on Climate via Mixed-Phase and Ice Clouds,
in: Annu. Rev. Earth. Planet Sci., Vol 45, edited by: Jeanloz, R. and
Freeman, K. H., Annu. Rev. Earth Planet. Sci., 199–222,
https://doi.org/10.1146/annurev-earth-060115-012240, 2017.
Stull, R. B.: An Introduction to Boundary Layer Meteorology, Kluwer
Academics Publishers, Dordrecht, 667 pp., 1988.
Thompson, S. K.: Sample-size for estimating multinomial proportions, Am.
Stat., 41, 42–46, https://doi.org/10.2307/2684318, 1987.
Tobo, Y., DeMott, P. J., Hill, T. C. J., Prenni, A. J., Swoboda-Colberg, N. G., Franc, G. D., and Kreidenweis, S. M.: Organic matter matters for ice nuclei of agricultural soil origin, Atmos. Chem. Phys., 14, 8521–8531, https://doi.org/10.5194/acp-14-8521-2014, 2014.
Tomlin, J. M., Jankowski, K. A., Veghte, D. P., China, S., Wang, P., Fraund, M., Weis, J., Zheng, G., Wang, Y., Rivera-Adorno, F., Raveh-Rubin, S., Knopf, D. A., Wang, J., Gilles, M. K., Moffet, R. C., and Laskin, A.: Impact of dry intrusion events on the composition and mixing state of particles during the winter Aerosol and Cloud Experiment in the Eastern North Atlantic (ACE-ENA), Atmos. Chem. Phys., 21, 18123–18146, https://doi.org/10.5194/acp-21-18123-2021, 2021.
Vali, G.: Quantitative evaluation of experimental results on heterogeneous
freezing nucleation of supercooled liquids, J. Atmos. Sci., 28, 402–409,
1971.
Vali, G., DeMott, P. J., Möhler, O., and Whale, T. F.: Technical Note: A proposal for ice nucleation terminology, Atmos. Chem. Phys., 15, 10263–10270, https://doi.org/10.5194/acp-15-10263-2015, 2015.
Wang, B. and Knopf, D. A.: Heterogeneous ice nucleation on particles
composed of humic-like substances impacted by O3, J. Geophys. Res., 116,
D03205, https://doi.org/10.1029/2010jd014964, 2011.
Wang, B., Lambe, A. T., Massoli, P., Onasch, T. B., Davidovits, P., Worsnop,
D. R., and Knopf, D. A.: The deposition ice nucleation and immersion
freezing potential of amorphous secondary organic aerosol: Pathways for ice
and mixed-phase cloud formation, J. Geophys. Res., 117, D16209,
https://doi.org/10.1029/2012jd018063, 2012a.
Wang, B., Laskin, A., Roedel, T., Gilles, M. K., Moffet, R. C., Tivanski, A.
V., and Knopf, D. A.: Heterogeneous ice nucleation and water uptake by
field-collected atmospheric particles below 273 K, J. Geophys. Res., 117,
D00V19, https://doi.org/10.1029/2012JD017446, 2012b.
Wang, J., Wood, R., Jensen, M. P., Chiu, J. C., Liu, Y. G., Lamer, K.,
Desai, N., Giangrande, S. E., Knopf, D. A., Kollias, P., Laskin, A., Liu, X.
H., Lu, C. S., Mechem, D., Mei, F., Starzec, M., Tomlinson, J., Wang, Y.,
Yum, S. S., Zheng, G. J., Aiken, A. C., Azevedo, E. B., Blanchard, Y.,
China, S., Dong, X. Q., Gallo, F., Gao, S. N., Ghate, V. P., Glienke, S.,
Goldberger, L., Hardin, J. C., Kuang, C. A., Luke, E. P., Matthews, A. A.,
Miller, M. A., Moffet, R., Pekour, M., Schmid, B., Sedlacek, A. J., Shaw, R.
A., Shilling, J. E., Sullivan, A., Suski, K., Veghte, D. P., Weber, R.,
Wyant, M., Yeom, J., Zawadowicz, M., and Zhang, Z. B.: Aerosol and Cloud
Experiments in the Eastern North Atlantic (ACE-ENA), B. Am. Meteorol.
Soc., 103, 619–641, https://doi.org/10.1175/bams-d-19-0220.1, 2022.
Wang, Y., Zheng, G., Jensen, M. P., Knopf, D. A., Laskin, A., Matthews, A. A., Mechem, D., Mei, F., Moffet, R., Sedlacek, A. J., Shilling, J. E., Springston, S., Sullivan, A., Tomlinson, J., Veghte, D., Weber, R., Wood, R., Zawadowicz, M. A., and Wang, J.: Vertical profiles of trace gas and aerosol properties over the eastern North Atlantic: variations with season and synoptic condition, Atmos. Chem. Phys., 21, 11079–11098, https://doi.org/10.5194/acp-21-11079-2021, 2021.
Wang, Y., Zheng, X., Dong, X., Xi, B., Wu, P., Logan, T., and Yung, Y. L.: Impacts of long-range transport of aerosols on marine-boundary-layer clouds in the eastern North Atlantic, Atmos. Chem. Phys., 20, 14741–14755, https://doi.org/10.5194/acp-20-14741-2020, 2020.
Welti, A., Thomson, E. S., Schrod, J., Ickes, L., David, R. O., Dong, Z., and Kanji, Z. A.: Overview of ambient ice nucleation measurements from 1949–2000, EGU General Assembly 2023, Vienna, Austria, 24–28 Apr 2023, EGU23-1458, https://doi.org/10.5194/egusphere-egu23-1458, 2023.
Wilbourn, E. K., Thornton, D. C. O., Ott, C., Graff, J., Quinn, P. K.,
Bates, T. S., Betha, R., Russell, L. M., Behrenfeld, M. J., and Brooks, S.
D.: Ice Nucleation by Marine Aerosols Over the North Atlantic Ocean in Late
Spring, J. Geophys. Res.-Atmos., 125, 17, https://doi.org/10.1029/2019jd030913, 2020.
Wilson, T. W., Ladino, L. A., Alpert, P. A., Breckels, M. N., Brooks, I. M.,
Browse, J., Burrows, S. M., Carslaw, K. S., Huffman, J. A., Judd, C.,
Kilthau, W. P., Mason, R. H., McFiggans, G., Miller, L. A., Najera, J. J.,
Polishchuk, E., Rae, S., Schiller, C. L., Si, M., Temprado, J. V., Whale, T.
F., Wong, J. P. S., Wurl, O., Yakobi-Hancock, J. D., Abbatt, J. P. D.,
Aller, J. Y., Bertram, A. K., Knopf, D. A., and Murray, B. J.: A marine
biogenic source of atmospheric ice-nucleating particles, Nature, 525,
234–238, https://doi.org/10.1038/nature14986, 2015.
Wolf, M. J., Zhang, Y., Zawadowicz, M. A., Goodell, M., Froyd, K., Freney,
E., Sellegri, K., Rosch, M., Cui, T. Q., Winter, M., Lacher, L., Axisa, D.,
DeMott, P. J., Levin, E. J. T., Gute, E., Abbatt, J., Koss, A., Kroll, J.
H., Surratt, J. D., and Cziczo, D. J.: A biogenic secondary organic aerosol
source of cirrus ice nucleating particles, Nat. Commun., 11, 4834,
https://doi.org/10.1038/s41467-020-18424-6, 2020.
Wood, R., Wyant, M., ., Bretherton, C. S., Remillard, J., Kollias, P.,
Fletcher, J., Stemmler, J., de Szoeke, S., Yuter, S., Miller, M., Mechem,
D., Tselioudis, G., Chiu, J. C., Mann, J. A. L., O'Connor, E. J., Hogan, R.
J., Dong, X. Q., Miller, M., Ghate, V., Jefferson, A., Min, Q. L., Minnis,
P., Palikonda, R., Albrecht, B., Luke, E., Hannay, C., and Lin, Y. L.:
Clouds, aerosols, and precipitation in the marine boundary layer An ARM
Mobile Facility Deployment, B. Am. Meteorol. Soc., 96, 419–439,
https://doi.org/10.1175/bams-d-13-00180.1, 2015.
Zawadowicz, M. A., Suski, K., Liu, J., Pekour, M., Fast, J., Mei, F., Sedlacek, A. J., Springston, S., Wang, Y., Zaveri, R. A., Wood, R., Wang, J., and Shilling, J. E.: Aircraft measurements of aerosol and trace gas chemistry in the eastern North Atlantic, Atmos. Chem. Phys., 21, 7983–8002, https://doi.org/10.5194/acp-21-7983-2021, 2021.
Zheng, G., Wang, Y., Aiken, A. C., Gallo, F., Jensen, M. P., Kollias, P., Kuang, C., Luke, E., Springston, S., Uin, J., Wood, R., and Wang, J.: Marine boundary layer aerosol in the eastern North Atlantic: seasonal variations and key controlling processes, Atmos. Chem. Phys., 18, 17615–17635, https://doi.org/10.5194/acp-18-17615-2018, 2018.
Zheng, G. J., Sedlacek, A. J., Aiken, A. C., Feng, Y., Watson, T. B.,
Raveh-Rubin, S., Uin, J., Lewis, E. R., and Wang, J.: Long-range transported
North American wildfire aerosols observed in marine boundary layer of
eastern North Atlantic, Environ. Int., 139, 16,
https://doi.org/10.1016/j.envint.2020.105680, 2020.
Zobrist, B., Koop, T., Luo, B. P., Marcolli, C., and Peter, T.:
Heterogeneous ice nucleation rate coefficient of water droplets coated by a
nonadecanol monolayer, J. Phys. Chem. C, 111, 2149–2155, https://doi.org/10.1021/Jp066080w, 2007.
Zobrist, B., Marcolli, C., Pedernera, D. A., and Koop, T.: Do atmospheric aerosols form glasses?, Atmos. Chem. Phys., 8, 5221–5244, https://doi.org/10.5194/acp-8-5221-2008, 2008.
Short summary
Ambient particle populations and associated ice-nucleating particles (INPs)
were examined from particle samples collected on board aircraft in the marine
boundary layer and free troposphere in the eastern North Atlantic during
summer and winter. Chemical imaging shows distinct differences in the
particle populations seasonally and with sampling altitudes, which are
reflected in the INP types. Freezing parameterizations are derived for
implementation in cloud-resolving and climate models.
Ambient particle populations and associated ice-nucleating particles (INPs)
were examined from...
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