Influence of explicit Phaeocystis parameterizations on the global distribution of marine dimethyl sulfide
Dimethyl sulfide (DMS) is a biogenic organosulfur compound which contributes strongly to marine aerosol mass and the determination of cloud condensation nuclei over the remote oceans. Since uncertainties in DMS flux to the atmosphere lead to large variations in climate forcing, the global DMS distri...
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ftosti:oai:osti.gov:1366897 2023-07-30T03:58:45+02:00 Influence of explicit Phaeocystis parameterizations on the global distribution of marine dimethyl sulfide Wang, Shanlin Elliott, Scott Maltrud, Mathew Cameron-Smith, Philip 2021-07-23 application/pdf http://www.osti.gov/servlets/purl/1366897 https://www.osti.gov/biblio/1366897 https://doi.org/10.1002/2015JG003017 unknown http://www.osti.gov/servlets/purl/1366897 https://www.osti.gov/biblio/1366897 https://doi.org/10.1002/2015JG003017 doi:10.1002/2015JG003017 54 ENVIRONMENTAL SCIENCES 58 GEOSCIENCES 2021 ftosti https://doi.org/10.1002/2015JG003017 2023-07-11T09:19:25Z Dimethyl sulfide (DMS) is a biogenic organosulfur compound which contributes strongly to marine aerosol mass and the determination of cloud condensation nuclei over the remote oceans. Since uncertainties in DMS flux to the atmosphere lead to large variations in climate forcing, the global DMS distribution has been the subject of increasingly complex dynamic simulations. DMS concentrations are directly controlled by marine ecosystems. Phaeocystis is a major DMS producer but is often omitted from global reduced sulfur mechanisms. Here we incorporate this phytoplankton group into the marine ecosystem-biogeochemical module of the Community Earth System Model. To examine its role in the ocean sulfur cycle, an earlier DMS model has been enhanced to include new knowledge gained over the last few years. Results from the baseline run show that simulated Phaeocystis biomass generally agrees with observations, with high concentrations near the Antarctic continent and between 50° and 60° north. Given the new explicit Phaeocystis representation, the DMS distribution shows significant improvements, especially regarding the amplitude and location of high-latitude peaks. The simulated global mean surface DMS value is 2.26 nM, comparable to an estimate of 2.34 nM from the latest climatology extrapolated based on observations. The total oceanic DMS source to the atmosphere is 20.4 Tg S/yr, on the low side of previous estimates. Comparisons with and without Phaeocystis show that the group dominates DMS distributions in temperate and cold waters, contributing 13% of the global flux. The proportion may increase as sea ice declines and should be considered in climate projections. Other/Unknown Material Antarc* Antarctic Sea ice SciTec Connect (Office of Scientific and Technical Information - OSTI, U.S. Department of Energy) Antarctic The Antarctic Journal of Geophysical Research: Biogeosciences 120 11 2158 2177 |
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Open Polar |
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SciTec Connect (Office of Scientific and Technical Information - OSTI, U.S. Department of Energy) |
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ftosti |
language |
unknown |
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54 ENVIRONMENTAL SCIENCES 58 GEOSCIENCES |
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54 ENVIRONMENTAL SCIENCES 58 GEOSCIENCES Wang, Shanlin Elliott, Scott Maltrud, Mathew Cameron-Smith, Philip Influence of explicit Phaeocystis parameterizations on the global distribution of marine dimethyl sulfide |
topic_facet |
54 ENVIRONMENTAL SCIENCES 58 GEOSCIENCES |
description |
Dimethyl sulfide (DMS) is a biogenic organosulfur compound which contributes strongly to marine aerosol mass and the determination of cloud condensation nuclei over the remote oceans. Since uncertainties in DMS flux to the atmosphere lead to large variations in climate forcing, the global DMS distribution has been the subject of increasingly complex dynamic simulations. DMS concentrations are directly controlled by marine ecosystems. Phaeocystis is a major DMS producer but is often omitted from global reduced sulfur mechanisms. Here we incorporate this phytoplankton group into the marine ecosystem-biogeochemical module of the Community Earth System Model. To examine its role in the ocean sulfur cycle, an earlier DMS model has been enhanced to include new knowledge gained over the last few years. Results from the baseline run show that simulated Phaeocystis biomass generally agrees with observations, with high concentrations near the Antarctic continent and between 50° and 60° north. Given the new explicit Phaeocystis representation, the DMS distribution shows significant improvements, especially regarding the amplitude and location of high-latitude peaks. The simulated global mean surface DMS value is 2.26 nM, comparable to an estimate of 2.34 nM from the latest climatology extrapolated based on observations. The total oceanic DMS source to the atmosphere is 20.4 Tg S/yr, on the low side of previous estimates. Comparisons with and without Phaeocystis show that the group dominates DMS distributions in temperate and cold waters, contributing 13% of the global flux. The proportion may increase as sea ice declines and should be considered in climate projections. |
author |
Wang, Shanlin Elliott, Scott Maltrud, Mathew Cameron-Smith, Philip |
author_facet |
Wang, Shanlin Elliott, Scott Maltrud, Mathew Cameron-Smith, Philip |
author_sort |
Wang, Shanlin |
title |
Influence of explicit Phaeocystis parameterizations on the global distribution of marine dimethyl sulfide |
title_short |
Influence of explicit Phaeocystis parameterizations on the global distribution of marine dimethyl sulfide |
title_full |
Influence of explicit Phaeocystis parameterizations on the global distribution of marine dimethyl sulfide |
title_fullStr |
Influence of explicit Phaeocystis parameterizations on the global distribution of marine dimethyl sulfide |
title_full_unstemmed |
Influence of explicit Phaeocystis parameterizations on the global distribution of marine dimethyl sulfide |
title_sort |
influence of explicit phaeocystis parameterizations on the global distribution of marine dimethyl sulfide |
publishDate |
2021 |
url |
http://www.osti.gov/servlets/purl/1366897 https://www.osti.gov/biblio/1366897 https://doi.org/10.1002/2015JG003017 |
geographic |
Antarctic The Antarctic |
geographic_facet |
Antarctic The Antarctic |
genre |
Antarc* Antarctic Sea ice |
genre_facet |
Antarc* Antarctic Sea ice |
op_relation |
http://www.osti.gov/servlets/purl/1366897 https://www.osti.gov/biblio/1366897 https://doi.org/10.1002/2015JG003017 doi:10.1002/2015JG003017 |
op_doi |
https://doi.org/10.1002/2015JG003017 |
container_title |
Journal of Geophysical Research: Biogeosciences |
container_volume |
120 |
container_issue |
11 |
container_start_page |
2158 |
op_container_end_page |
2177 |
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1772809487863775232 |