Spatial variation in seabed temperatures in the Southern Ocean: implications for benthic ecology and biogeography
The Antarctic seabed has traditionally been regarded as cold and thermally stable, with little spatial or seasonal variation in temperature. Here we demonstrate marked spatial variations in continental shelf seabed temperature around Antarctica, with the western Antarctic Peninsula shelf significant...
Published in: | Journal of Geophysical Research |
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American Geophysical Union
2009
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ftnerc:oai:nora.nerc.ac.uk:10763 2023-05-15T13:45:10+02:00 Spatial variation in seabed temperatures in the Southern Ocean: implications for benthic ecology and biogeography Clarke, Andrew Griffiths, Huw J. Barnes, David K.A. Meredith, Michael P. Grant, Susie M. 2009-09 http://nora.nerc.ac.uk/id/eprint/10763/ https://agupubs.onlinelibrary.wiley.com/doi/full/10.1029/2008JG000886 unknown American Geophysical Union Clarke, Andrew orcid:0000-0002-7582-3074 Griffiths, Huw J. orcid:0000-0003-1764-223X Barnes, David K.A. orcid:0000-0002-9076-7867 Meredith, Michael P. orcid:0000-0002-7342-7756 Grant, Susie M. 2009 Spatial variation in seabed temperatures in the Southern Ocean: implications for benthic ecology and biogeography. Journal of Geophysical Research, 114 (G3), G03003. 11, pp. https://doi.org/10.1029/2008JG000886 <https://doi.org/10.1029/2008JG000886> Marine Sciences Meteorology and Climatology Ecology and Environment Publication - Article PeerReviewed 2009 ftnerc https://doi.org/10.1029/2008JG000886 2023-02-04T19:26:54Z The Antarctic seabed has traditionally been regarded as cold and thermally stable, with little spatial or seasonal variation in temperature. Here we demonstrate marked spatial variations in continental shelf seabed temperature around Antarctica, with the western Antarctic Peninsula shelf significantly warmer than shelves around continental Antarctica as a result of flooding of the shelf by Circumpolar Deep Water from the Antarctic Circumpolar Current. The coldest shelf seabed temperatures are in the Weddell Sea, Ross Sea, and Prydz Bay as a consequence of seasonal convection associated with strong air-sea heat fluxes and sea-ice formation. These waters constitute the dense precursors of Antarctic Bottom Water, and can descend down the adjacent slope to inject cold water into the Southern Ocean deep sea. Deep sea seabed temperatures are coldest in the Weddell Sea and are progressively warmer to the east. There is a distinct latitudinal gradient in the difference between seabed temperatures on the shelf and in the deep sea, with the deep sea warmer by up to similar to 2 K at high latitudes and colder by similar to 2 K around sub-Antarctic islands. These differences have important consequences for benthic ecology and biogeography, understanding the evolutionary history of the Antarctic marine biota, and the impact of regional climate change. Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Antarctica Prydz Bay Ross Sea Sea ice Southern Ocean Weddell Sea Natural Environment Research Council: NERC Open Research Archive Antarctic Southern Ocean The Antarctic Antarctic Peninsula Weddell Sea Ross Sea Prydz Bay Weddell Journal of Geophysical Research 114 G3 |
institution |
Open Polar |
collection |
Natural Environment Research Council: NERC Open Research Archive |
op_collection_id |
ftnerc |
language |
unknown |
topic |
Marine Sciences Meteorology and Climatology Ecology and Environment |
spellingShingle |
Marine Sciences Meteorology and Climatology Ecology and Environment Clarke, Andrew Griffiths, Huw J. Barnes, David K.A. Meredith, Michael P. Grant, Susie M. Spatial variation in seabed temperatures in the Southern Ocean: implications for benthic ecology and biogeography |
topic_facet |
Marine Sciences Meteorology and Climatology Ecology and Environment |
description |
The Antarctic seabed has traditionally been regarded as cold and thermally stable, with little spatial or seasonal variation in temperature. Here we demonstrate marked spatial variations in continental shelf seabed temperature around Antarctica, with the western Antarctic Peninsula shelf significantly warmer than shelves around continental Antarctica as a result of flooding of the shelf by Circumpolar Deep Water from the Antarctic Circumpolar Current. The coldest shelf seabed temperatures are in the Weddell Sea, Ross Sea, and Prydz Bay as a consequence of seasonal convection associated with strong air-sea heat fluxes and sea-ice formation. These waters constitute the dense precursors of Antarctic Bottom Water, and can descend down the adjacent slope to inject cold water into the Southern Ocean deep sea. Deep sea seabed temperatures are coldest in the Weddell Sea and are progressively warmer to the east. There is a distinct latitudinal gradient in the difference between seabed temperatures on the shelf and in the deep sea, with the deep sea warmer by up to similar to 2 K at high latitudes and colder by similar to 2 K around sub-Antarctic islands. These differences have important consequences for benthic ecology and biogeography, understanding the evolutionary history of the Antarctic marine biota, and the impact of regional climate change. |
format |
Article in Journal/Newspaper |
author |
Clarke, Andrew Griffiths, Huw J. Barnes, David K.A. Meredith, Michael P. Grant, Susie M. |
author_facet |
Clarke, Andrew Griffiths, Huw J. Barnes, David K.A. Meredith, Michael P. Grant, Susie M. |
author_sort |
Clarke, Andrew |
title |
Spatial variation in seabed temperatures in the Southern Ocean: implications for benthic ecology and biogeography |
title_short |
Spatial variation in seabed temperatures in the Southern Ocean: implications for benthic ecology and biogeography |
title_full |
Spatial variation in seabed temperatures in the Southern Ocean: implications for benthic ecology and biogeography |
title_fullStr |
Spatial variation in seabed temperatures in the Southern Ocean: implications for benthic ecology and biogeography |
title_full_unstemmed |
Spatial variation in seabed temperatures in the Southern Ocean: implications for benthic ecology and biogeography |
title_sort |
spatial variation in seabed temperatures in the southern ocean: implications for benthic ecology and biogeography |
publisher |
American Geophysical Union |
publishDate |
2009 |
url |
http://nora.nerc.ac.uk/id/eprint/10763/ https://agupubs.onlinelibrary.wiley.com/doi/full/10.1029/2008JG000886 |
geographic |
Antarctic Southern Ocean The Antarctic Antarctic Peninsula Weddell Sea Ross Sea Prydz Bay Weddell |
geographic_facet |
Antarctic Southern Ocean The Antarctic Antarctic Peninsula Weddell Sea Ross Sea Prydz Bay Weddell |
genre |
Antarc* Antarctic Antarctic Peninsula Antarctica Prydz Bay Ross Sea Sea ice Southern Ocean Weddell Sea |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Antarctica Prydz Bay Ross Sea Sea ice Southern Ocean Weddell Sea |
op_relation |
Clarke, Andrew orcid:0000-0002-7582-3074 Griffiths, Huw J. orcid:0000-0003-1764-223X Barnes, David K.A. orcid:0000-0002-9076-7867 Meredith, Michael P. orcid:0000-0002-7342-7756 Grant, Susie M. 2009 Spatial variation in seabed temperatures in the Southern Ocean: implications for benthic ecology and biogeography. Journal of Geophysical Research, 114 (G3), G03003. 11, pp. https://doi.org/10.1029/2008JG000886 <https://doi.org/10.1029/2008JG000886> |
op_doi |
https://doi.org/10.1029/2008JG000886 |
container_title |
Journal of Geophysical Research |
container_volume |
114 |
container_issue |
G3 |
_version_ |
1766214274524381184 |