High productivity in an ice melting hot spot at the eastern boundary of the Weddell Gyre

The Southern Ocean (SO) plays a key role in modulating atmospheric CO 2 via physical and biological processes. However, over much of the SO, biological activity is iron-limited. New in situ data from the Antarctic zone south of Africa in a region centered at ~20°E-25°E reveal a previously overlooked...

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Published in:Global Biogeochemical Cycles
Main Authors: Geibert, W, Assmy, P, Bakker, DCE, Hanfland, C, Hoppema, M, Pichevin, L, Schroder, M, Schwarz, JN, Stimac, I, Usbeck, U, Webb, A
Format: Article in Journal/Newspaper
Language:unknown
Published: 2010
Subjects:
Online Access:https://ueaeprints.uea.ac.uk/id/eprint/20293/
https://doi.org/10.1029/2009GB003657
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spelling ftuniveastangl:oai:ueaeprints.uea.ac.uk:20293 2023-05-15T13:52:43+02:00 High productivity in an ice melting hot spot at the eastern boundary of the Weddell Gyre Geibert, W Assmy, P Bakker, DCE Hanfland, C Hoppema, M Pichevin, L Schroder, M Schwarz, JN Stimac, I Usbeck, U Webb, A 2010 https://ueaeprints.uea.ac.uk/id/eprint/20293/ https://doi.org/10.1029/2009GB003657 unknown Geibert, W, Assmy, P, Bakker, DCE, Hanfland, C, Hoppema, M, Pichevin, L, Schroder, M, Schwarz, JN, Stimac, I, Usbeck, U and Webb, A (2010) High productivity in an ice melting hot spot at the eastern boundary of the Weddell Gyre. Global Biogeochemical Cycles, 24 (3). ISSN 1944-9224 doi:10.1029/2009GB003657 Article PeerReviewed 2010 ftuniveastangl https://doi.org/10.1029/2009GB003657 2023-03-23T23:31:25Z The Southern Ocean (SO) plays a key role in modulating atmospheric CO 2 via physical and biological processes. However, over much of the SO, biological activity is iron-limited. New in situ data from the Antarctic zone south of Africa in a region centered at ~20°E-25°E reveal a previously overlooked region of high primary production, comparable in size to the northwest African upwelling region. Here, sea ice together with enclosed icebergs is channeled by prevailing winds to the eastern boundary of the Weddell Gyre, where a sharp transition to warmer waters causes melting. This cumulative melting provides a steady source of iron, fuelling an intense phytoplankton bloom that is not fully captured by monthly satellite production estimates. These findings imply that future changes in sea-ice cover and dynamics could have a significant effect on carbon sequestration in the SO. Article in Journal/Newspaper Antarc* Antarctic Iceberg* Sea ice Southern Ocean University of East Anglia: UEA Digital Repository Antarctic Southern Ocean The Antarctic Weddell Global Biogeochemical Cycles 24 3 n/a n/a
institution Open Polar
collection University of East Anglia: UEA Digital Repository
op_collection_id ftuniveastangl
language unknown
description The Southern Ocean (SO) plays a key role in modulating atmospheric CO 2 via physical and biological processes. However, over much of the SO, biological activity is iron-limited. New in situ data from the Antarctic zone south of Africa in a region centered at ~20°E-25°E reveal a previously overlooked region of high primary production, comparable in size to the northwest African upwelling region. Here, sea ice together with enclosed icebergs is channeled by prevailing winds to the eastern boundary of the Weddell Gyre, where a sharp transition to warmer waters causes melting. This cumulative melting provides a steady source of iron, fuelling an intense phytoplankton bloom that is not fully captured by monthly satellite production estimates. These findings imply that future changes in sea-ice cover and dynamics could have a significant effect on carbon sequestration in the SO.
format Article in Journal/Newspaper
author Geibert, W
Assmy, P
Bakker, DCE
Hanfland, C
Hoppema, M
Pichevin, L
Schroder, M
Schwarz, JN
Stimac, I
Usbeck, U
Webb, A
spellingShingle Geibert, W
Assmy, P
Bakker, DCE
Hanfland, C
Hoppema, M
Pichevin, L
Schroder, M
Schwarz, JN
Stimac, I
Usbeck, U
Webb, A
High productivity in an ice melting hot spot at the eastern boundary of the Weddell Gyre
author_facet Geibert, W
Assmy, P
Bakker, DCE
Hanfland, C
Hoppema, M
Pichevin, L
Schroder, M
Schwarz, JN
Stimac, I
Usbeck, U
Webb, A
author_sort Geibert, W
title High productivity in an ice melting hot spot at the eastern boundary of the Weddell Gyre
title_short High productivity in an ice melting hot spot at the eastern boundary of the Weddell Gyre
title_full High productivity in an ice melting hot spot at the eastern boundary of the Weddell Gyre
title_fullStr High productivity in an ice melting hot spot at the eastern boundary of the Weddell Gyre
title_full_unstemmed High productivity in an ice melting hot spot at the eastern boundary of the Weddell Gyre
title_sort high productivity in an ice melting hot spot at the eastern boundary of the weddell gyre
publishDate 2010
url https://ueaeprints.uea.ac.uk/id/eprint/20293/
https://doi.org/10.1029/2009GB003657
geographic Antarctic
Southern Ocean
The Antarctic
Weddell
geographic_facet Antarctic
Southern Ocean
The Antarctic
Weddell
genre Antarc*
Antarctic
Iceberg*
Sea ice
Southern Ocean
genre_facet Antarc*
Antarctic
Iceberg*
Sea ice
Southern Ocean
op_relation Geibert, W, Assmy, P, Bakker, DCE, Hanfland, C, Hoppema, M, Pichevin, L, Schroder, M, Schwarz, JN, Stimac, I, Usbeck, U and Webb, A (2010) High productivity in an ice melting hot spot at the eastern boundary of the Weddell Gyre. Global Biogeochemical Cycles, 24 (3). ISSN 1944-9224
doi:10.1029/2009GB003657
op_doi https://doi.org/10.1029/2009GB003657
container_title Global Biogeochemical Cycles
container_volume 24
container_issue 3
container_start_page n/a
op_container_end_page n/a
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