Controls on Climate-Active Gases by Amundsen Sea Ice Biota
Abstract: Convincing evidence now confirms that polar regions are changing rapidly in response to human activities. Changes in sea ice extent and thickness will have profound implications for productivity, food webs and carbon fluxes at high latitudes, since sea ice biota are a significant source of...
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IEDA: US Antarctic Program Data Center
2010
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dataone:http://get.iedadata.org/metadata/iso/600092 2024-06-03T18:46:22+00:00 Controls on Climate-Active Gases by Amundsen Sea Ice Biota Smith, Walker O. ENVELOPE(100.0,170.0,-69.0,-79.0) BEGINDATE: 2008-09-01T00:00:00Z ENDDATE: 2010-08-31T00:00:00Z 2010-01-01T00:00:00Z http://get.iedadata.org/metadata/iso/600092 unknown IEDA: US Antarctic Program Data Center Oden2008 CTD Oden Antarctic Organisms and Ecosystems Chemistry:Fluid Sea Surface Antarctica Sea Ice Southern Ocean Cryosphere Oceans Amundsen Sea US Antarctic Program Data Center (USAP-DC) Dataset 2010 dataone:urn:node:IEDA_USAP 2024-06-03T18:11:58Z Abstract: Convincing evidence now confirms that polar regions are changing rapidly in response to human activities. Changes in sea ice extent and thickness will have profound implications for productivity, food webs and carbon fluxes at high latitudes, since sea ice biota are a significant source of biogenic matter for the ecosystem. While sea ice is often thought to be a barrier to gas exchange between the ocean and the atmosphere, it more likely functions as a source or sink for climate-active gases such as carbon dioxide and ozone-depleting organohalogens, due in part to activities of microbes embedded in the sea ice matrix. This project brings together experienced US and Swedish investigators to examine the controls by sea-ice biota on the production and degradation of key climate-active gases in the Pacific sector of the Southern Ocean. We hypothesize that 1) the physical properties of the sea-ice environment will determine the community structure and activities of the sea ice biota; 2) the productivity, biomass, physiological state and species composition of ice algae will determine the production of specific classes of organic carbon, including organohalogens; 3) heterotrophic co-metabolism within the ice will break down these compounds to some extent, depending on the microbial community structure and productivity, and 4) the sea ice to atmosphere fluxes of CO2 and organohalogens will be inversely related. This project will build close scientific collaborations between US and Swedish researchers and also train young scientists, including members of underrepresented groups. Dissemination of results will include the scientific literature, and public outreach venues including interactions with a PolarTrec teacher. Dataset Amundsen Sea Antarc* Antarctic Antarctica ice algae Sea ice Southern Ocean IEDA: US Antarctic Program Data Center (via DataONE) Antarctic Southern Ocean Amundsen Sea Pacific ENVELOPE(100.0,170.0,-69.0,-79.0) |
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Open Polar |
collection |
IEDA: US Antarctic Program Data Center (via DataONE) |
op_collection_id |
dataone:urn:node:IEDA_USAP |
language |
unknown |
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Oden2008 CTD Oden Antarctic Organisms and Ecosystems Chemistry:Fluid Sea Surface Antarctica Sea Ice Southern Ocean Cryosphere Oceans Amundsen Sea US Antarctic Program Data Center (USAP-DC) |
spellingShingle |
Oden2008 CTD Oden Antarctic Organisms and Ecosystems Chemistry:Fluid Sea Surface Antarctica Sea Ice Southern Ocean Cryosphere Oceans Amundsen Sea US Antarctic Program Data Center (USAP-DC) Smith, Walker O. Controls on Climate-Active Gases by Amundsen Sea Ice Biota |
topic_facet |
Oden2008 CTD Oden Antarctic Organisms and Ecosystems Chemistry:Fluid Sea Surface Antarctica Sea Ice Southern Ocean Cryosphere Oceans Amundsen Sea US Antarctic Program Data Center (USAP-DC) |
description |
Abstract: Convincing evidence now confirms that polar regions are changing rapidly in response to human activities. Changes in sea ice extent and thickness will have profound implications for productivity, food webs and carbon fluxes at high latitudes, since sea ice biota are a significant source of biogenic matter for the ecosystem. While sea ice is often thought to be a barrier to gas exchange between the ocean and the atmosphere, it more likely functions as a source or sink for climate-active gases such as carbon dioxide and ozone-depleting organohalogens, due in part to activities of microbes embedded in the sea ice matrix. This project brings together experienced US and Swedish investigators to examine the controls by sea-ice biota on the production and degradation of key climate-active gases in the Pacific sector of the Southern Ocean. We hypothesize that 1) the physical properties of the sea-ice environment will determine the community structure and activities of the sea ice biota; 2) the productivity, biomass, physiological state and species composition of ice algae will determine the production of specific classes of organic carbon, including organohalogens; 3) heterotrophic co-metabolism within the ice will break down these compounds to some extent, depending on the microbial community structure and productivity, and 4) the sea ice to atmosphere fluxes of CO2 and organohalogens will be inversely related. This project will build close scientific collaborations between US and Swedish researchers and also train young scientists, including members of underrepresented groups. Dissemination of results will include the scientific literature, and public outreach venues including interactions with a PolarTrec teacher. |
format |
Dataset |
author |
Smith, Walker O. |
author_facet |
Smith, Walker O. |
author_sort |
Smith, Walker O. |
title |
Controls on Climate-Active Gases by Amundsen Sea Ice Biota |
title_short |
Controls on Climate-Active Gases by Amundsen Sea Ice Biota |
title_full |
Controls on Climate-Active Gases by Amundsen Sea Ice Biota |
title_fullStr |
Controls on Climate-Active Gases by Amundsen Sea Ice Biota |
title_full_unstemmed |
Controls on Climate-Active Gases by Amundsen Sea Ice Biota |
title_sort |
controls on climate-active gases by amundsen sea ice biota |
publisher |
IEDA: US Antarctic Program Data Center |
publishDate |
2010 |
url |
http://get.iedadata.org/metadata/iso/600092 |
op_coverage |
ENVELOPE(100.0,170.0,-69.0,-79.0) BEGINDATE: 2008-09-01T00:00:00Z ENDDATE: 2010-08-31T00:00:00Z |
long_lat |
ENVELOPE(100.0,170.0,-69.0,-79.0) |
geographic |
Antarctic Southern Ocean Amundsen Sea Pacific |
geographic_facet |
Antarctic Southern Ocean Amundsen Sea Pacific |
genre |
Amundsen Sea Antarc* Antarctic Antarctica ice algae Sea ice Southern Ocean |
genre_facet |
Amundsen Sea Antarc* Antarctic Antarctica ice algae Sea ice Southern Ocean |
_version_ |
1800869202204033024 |