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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ftdoajarticles:oai:doaj.org/article:e81795ddb506441db7ac23066ce64c24 2023-05-15T13:54:08+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 Gan Luo Fangqun Yu 2010-12-01T00:00:00Z https://doi.org/10.3390/atmos1010034 https://doaj.org/article/e81795ddb506441db7ac23066ce64c24 EN eng MDPI AG http://www.mdpi.com/2073-4433/1/1/34/ https://doaj.org/toc/2073-4433 doi:10.3390/atmos1010034 2073-4433 https://doaj.org/article/e81795ddb506441db7ac23066ce64c24 Atmosphere, Vol 1, Iss 1, Pp 34-50 (2010) DMS emission nucleation southern ocean seasonal variations CCN Meteorology. Climatology QC851-999 article 2010 ftdoajarticles https://doi.org/10.3390/atmos1010034 2022-12-31T08:52:34Z 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. Article in Journal/Newspaper Antarc* Antarctic Antarctica Southern Ocean Directory of Open Access Journals: DOAJ Articles Antarctic Austral Neumayer Southern Ocean The Antarctic Atmosphere 1 1 34 50 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
DMS emission nucleation southern ocean seasonal variations CCN Meteorology. Climatology QC851-999 |
spellingShingle |
DMS emission nucleation southern ocean seasonal variations CCN Meteorology. Climatology QC851-999 Gan Luo Fangqun Yu 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 Meteorology. Climatology QC851-999 |
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 |
Article in Journal/Newspaper |
author |
Gan Luo Fangqun Yu |
author_facet |
Gan Luo Fangqun Yu |
author_sort |
Gan Luo |
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 |
MDPI AG |
publishDate |
2010 |
url |
https://doi.org/10.3390/atmos1010034 https://doaj.org/article/e81795ddb506441db7ac23066ce64c24 |
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, Vol 1, Iss 1, Pp 34-50 (2010) |
op_relation |
http://www.mdpi.com/2073-4433/1/1/34/ https://doaj.org/toc/2073-4433 doi:10.3390/atmos1010034 2073-4433 https://doaj.org/article/e81795ddb506441db7ac23066ce64c24 |
op_doi |
https://doi.org/10.3390/atmos1010034 |
container_title |
Atmosphere |
container_volume |
1 |
container_issue |
1 |
container_start_page |
34 |
op_container_end_page |
50 |
_version_ |
1766259775999311872 |