Diverse mixing state and ice nucleation properties of aerosol particles over the Western Pacific and the Southern Ocean
Atmospheric particles can impact cloud formation and play a critical role in regulating cloud properties. However, particle characteristics at the single-particle level and their ability to act as ice-nucleating particles (INPs) over the marine atmosphere are poorly understood. In this study, we pre...
Main Authors: | , , , , , , |
---|---|
Format: | Text |
Language: | English |
Published: |
2024
|
Subjects: | |
Online Access: | https://doi.org/10.5194/egusphere-2023-2646 https://egusphere.copernicus.org/preprints/2023/egusphere-2023-2646/ |
id |
ftcopernicus:oai:publications.copernicus.org:egusphere115887 |
---|---|
record_format |
openpolar |
spelling |
ftcopernicus:oai:publications.copernicus.org:egusphere115887 2024-09-15T17:48:37+00:00 Diverse mixing state and ice nucleation properties of aerosol particles over the Western Pacific and the Southern Ocean Xue, Jiao Zhang, Tian Park, Keyhong Yan, Jinpei Yoon, Young Jun Park, Jiyeon Wang, Bingbing 2024-07-09 application/pdf https://doi.org/10.5194/egusphere-2023-2646 https://egusphere.copernicus.org/preprints/2023/egusphere-2023-2646/ eng eng doi:10.5194/egusphere-2023-2646 https://egusphere.copernicus.org/preprints/2023/egusphere-2023-2646/ eISSN: Text 2024 ftcopernicus https://doi.org/10.5194/egusphere-2023-2646 2024-08-28T05:24:15Z Atmospheric particles can impact cloud formation and play a critical role in regulating cloud properties. However, particle characteristics at the single-particle level and their ability to act as ice-nucleating particles (INPs) over the marine atmosphere are poorly understood. In this study, we present micro-spectroscopic characterizations and ice nucleation properties of particles collected during a cruise from South Korea to Antarctica in 2019. Most of the samples were dominated by fresh sea salt, aged sea salt, and sea salt mixed with sulfate particles, with total number percentages ranging from 48 % to 99 % over the western Pacific and the Southern Ocean. The mixing-state index of the particle population ranged from 50 % to 95 % over the Northern Hemisphere and Southern Hemisphere. Multiphase processes on sea salt particles resulted in chlorine deficiency. This selective aging process made the marine particle population more externally mixed. Ice nucleation onset conditions primarily for the deposition mode were measured and the investigated particles showed diverse ice nucleation abilities. The fresh sea salt particles with organic coatings exhibited the highest ice nucleation ability at a relative humidity with respect to ice as low as 121 %. The sea salt mixed sulfate particle was enriched in INPs by a factor of 1.9. Aging processes affected both the mixing state of the particles and their ice nucleation abilities. Our analysis shows that assuming an internally mixed particle population in the marine atmosphere can lead to errors of several orders of magnitude in predicting ice nucleation rates. Text Antarc* Antarctica Southern Ocean Copernicus Publications: E-Journals |
institution |
Open Polar |
collection |
Copernicus Publications: E-Journals |
op_collection_id |
ftcopernicus |
language |
English |
description |
Atmospheric particles can impact cloud formation and play a critical role in regulating cloud properties. However, particle characteristics at the single-particle level and their ability to act as ice-nucleating particles (INPs) over the marine atmosphere are poorly understood. In this study, we present micro-spectroscopic characterizations and ice nucleation properties of particles collected during a cruise from South Korea to Antarctica in 2019. Most of the samples were dominated by fresh sea salt, aged sea salt, and sea salt mixed with sulfate particles, with total number percentages ranging from 48 % to 99 % over the western Pacific and the Southern Ocean. The mixing-state index of the particle population ranged from 50 % to 95 % over the Northern Hemisphere and Southern Hemisphere. Multiphase processes on sea salt particles resulted in chlorine deficiency. This selective aging process made the marine particle population more externally mixed. Ice nucleation onset conditions primarily for the deposition mode were measured and the investigated particles showed diverse ice nucleation abilities. The fresh sea salt particles with organic coatings exhibited the highest ice nucleation ability at a relative humidity with respect to ice as low as 121 %. The sea salt mixed sulfate particle was enriched in INPs by a factor of 1.9. Aging processes affected both the mixing state of the particles and their ice nucleation abilities. Our analysis shows that assuming an internally mixed particle population in the marine atmosphere can lead to errors of several orders of magnitude in predicting ice nucleation rates. |
format |
Text |
author |
Xue, Jiao Zhang, Tian Park, Keyhong Yan, Jinpei Yoon, Young Jun Park, Jiyeon Wang, Bingbing |
spellingShingle |
Xue, Jiao Zhang, Tian Park, Keyhong Yan, Jinpei Yoon, Young Jun Park, Jiyeon Wang, Bingbing Diverse mixing state and ice nucleation properties of aerosol particles over the Western Pacific and the Southern Ocean |
author_facet |
Xue, Jiao Zhang, Tian Park, Keyhong Yan, Jinpei Yoon, Young Jun Park, Jiyeon Wang, Bingbing |
author_sort |
Xue, Jiao |
title |
Diverse mixing state and ice nucleation properties of aerosol particles over the Western Pacific and the Southern Ocean |
title_short |
Diverse mixing state and ice nucleation properties of aerosol particles over the Western Pacific and the Southern Ocean |
title_full |
Diverse mixing state and ice nucleation properties of aerosol particles over the Western Pacific and the Southern Ocean |
title_fullStr |
Diverse mixing state and ice nucleation properties of aerosol particles over the Western Pacific and the Southern Ocean |
title_full_unstemmed |
Diverse mixing state and ice nucleation properties of aerosol particles over the Western Pacific and the Southern Ocean |
title_sort |
diverse mixing state and ice nucleation properties of aerosol particles over the western pacific and the southern ocean |
publishDate |
2024 |
url |
https://doi.org/10.5194/egusphere-2023-2646 https://egusphere.copernicus.org/preprints/2023/egusphere-2023-2646/ |
genre |
Antarc* Antarctica Southern Ocean |
genre_facet |
Antarc* Antarctica Southern Ocean |
op_source |
eISSN: |
op_relation |
doi:10.5194/egusphere-2023-2646 https://egusphere.copernicus.org/preprints/2023/egusphere-2023-2646/ |
op_doi |
https://doi.org/10.5194/egusphere-2023-2646 |
_version_ |
1810290065172070400 |