Oceanic Dimethyl Sulfide Emission and New Particle Formation around the Coast of Antarctica: A Modeling Study of Seasonal Variations and Comparison with Measurements
A clear understanding of new particle formation processes in remote oceans is critical for properly assessing the role of oceanic dimethyl sulfide (DMS) emission on the Earth’s climate and associated climate feedback processes. Almost free from anthropogenic pollutants and leafed plants, the Antarct...
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Molecular Diversity Preservation International
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ftmdpi:oai:mdpi.com:/2073-4433/1/1/34/ 2023-08-20T04:00:46+02:00 Oceanic Dimethyl Sulfide Emission and New Particle Formation around the Coast of Antarctica: A Modeling Study of Seasonal Variations and Comparison with Measurements Fangqun Yu Gan Luo agris 2010-12-06 application/pdf https://doi.org/10.3390/atmos1010034 EN eng Molecular Diversity Preservation International https://dx.doi.org/10.3390/atmos1010034 https://creativecommons.org/licenses/by/3.0/ Atmosphere; Volume 1; Issue 1; Pages: 34-50 DMS emission nucleation southern ocean seasonal variations CCN Text 2010 ftmdpi https://doi.org/10.3390/atmos1010034 2023-07-31T20:25:39Z A clear understanding of new particle formation processes in remote oceans is critical for properly assessing the role of oceanic dimethyl sulfide (DMS) emission on the Earth’s climate and associated climate feedback processes. Almost free from anthropogenic pollutants and leafed plants, the Antarctic continent and surrounding oceans are unique regions for studying the lifecycle of natural sulfate aerosols. Here we investigate the well-recognized seasonal variations of new particle formation around Antarctic coastal areas with a recently developed global size-resolved aerosol model. Our simulations indicate that enhanced DMS emission and photochemistry during the austral summer season lead to significant new particle formation via ion-mediated nucleation (IMN) and much higher particle number concentrations over Antarctica and surrounding oceans. By comparing predicted condensation nuclei larger than 10 nm (CN10) during a three-year period (2005–2007) with the long-period continuous CN10 measurements at the German Antarctic station Neumayer, we show that the model captures the absolute values of monthly mean CN10 (within a factor 2–3) as well as their seasonal variations. Our simulations confirm that the observed Antarctic CN10 and cloud condensation nuclei (CCN) seasonal variations are due to the formation of secondary particles during the austral summer. From the austral winter to summer, the zonally averaged CN10 and CCN in the lower troposphere over Antarctica increase by a factor of ~4–6 and ~2–4, respectively. This study appears to show that the H2SO4-H2O IMN mechanism is able to account for the new particle formation frequently observed in the Antarctica region during the austral summer. Text Antarc* Antarctic Antarctica Southern Ocean MDPI Open Access Publishing Antarctic Austral Neumayer Southern Ocean The Antarctic Atmosphere 1 1 34 50 |
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MDPI Open Access Publishing |
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English |
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DMS emission nucleation southern ocean seasonal variations CCN |
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DMS emission nucleation southern ocean seasonal variations CCN Fangqun Yu Gan Luo Oceanic Dimethyl Sulfide Emission and New Particle Formation around the Coast of Antarctica: A Modeling Study of Seasonal Variations and Comparison with Measurements |
topic_facet |
DMS emission nucleation southern ocean seasonal variations CCN |
description |
A clear understanding of new particle formation processes in remote oceans is critical for properly assessing the role of oceanic dimethyl sulfide (DMS) emission on the Earth’s climate and associated climate feedback processes. Almost free from anthropogenic pollutants and leafed plants, the Antarctic continent and surrounding oceans are unique regions for studying the lifecycle of natural sulfate aerosols. Here we investigate the well-recognized seasonal variations of new particle formation around Antarctic coastal areas with a recently developed global size-resolved aerosol model. Our simulations indicate that enhanced DMS emission and photochemistry during the austral summer season lead to significant new particle formation via ion-mediated nucleation (IMN) and much higher particle number concentrations over Antarctica and surrounding oceans. By comparing predicted condensation nuclei larger than 10 nm (CN10) during a three-year period (2005–2007) with the long-period continuous CN10 measurements at the German Antarctic station Neumayer, we show that the model captures the absolute values of monthly mean CN10 (within a factor 2–3) as well as their seasonal variations. Our simulations confirm that the observed Antarctic CN10 and cloud condensation nuclei (CCN) seasonal variations are due to the formation of secondary particles during the austral summer. From the austral winter to summer, the zonally averaged CN10 and CCN in the lower troposphere over Antarctica increase by a factor of ~4–6 and ~2–4, respectively. This study appears to show that the H2SO4-H2O IMN mechanism is able to account for the new particle formation frequently observed in the Antarctica region during the austral summer. |
format |
Text |
author |
Fangqun Yu Gan Luo |
author_facet |
Fangqun Yu Gan Luo |
author_sort |
Fangqun Yu |
title |
Oceanic Dimethyl Sulfide Emission and New Particle Formation around the Coast of Antarctica: A Modeling Study of Seasonal Variations and Comparison with Measurements |
title_short |
Oceanic Dimethyl Sulfide Emission and New Particle Formation around the Coast of Antarctica: A Modeling Study of Seasonal Variations and Comparison with Measurements |
title_full |
Oceanic Dimethyl Sulfide Emission and New Particle Formation around the Coast of Antarctica: A Modeling Study of Seasonal Variations and Comparison with Measurements |
title_fullStr |
Oceanic Dimethyl Sulfide Emission and New Particle Formation around the Coast of Antarctica: A Modeling Study of Seasonal Variations and Comparison with Measurements |
title_full_unstemmed |
Oceanic Dimethyl Sulfide Emission and New Particle Formation around the Coast of Antarctica: A Modeling Study of Seasonal Variations and Comparison with Measurements |
title_sort |
oceanic dimethyl sulfide emission and new particle formation around the coast of antarctica: a modeling study of seasonal variations and comparison with measurements |
publisher |
Molecular Diversity Preservation International |
publishDate |
2010 |
url |
https://doi.org/10.3390/atmos1010034 |
op_coverage |
agris |
geographic |
Antarctic Austral Neumayer Southern Ocean The Antarctic |
geographic_facet |
Antarctic Austral Neumayer Southern Ocean The Antarctic |
genre |
Antarc* Antarctic Antarctica Southern Ocean |
genre_facet |
Antarc* Antarctic Antarctica Southern Ocean |
op_source |
Atmosphere; Volume 1; Issue 1; Pages: 34-50 |
op_relation |
https://dx.doi.org/10.3390/atmos1010034 |
op_rights |
https://creativecommons.org/licenses/by/3.0/ |
op_doi |
https://doi.org/10.3390/atmos1010034 |
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Atmosphere |
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1 |
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1 |
container_start_page |
34 |
op_container_end_page |
50 |
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1774720209782833152 |