Biogeochemistry of the Eastern Weddell Gyre ...

The Southern Ocean (SO) plays a key role in modulating atmospheric CO2 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 overlooke...

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Bibliographic Details
Main Authors: Geibert, Walter, Assmy, Philipp, Bakker, Dorothee C E, Hanfland, Claudia, Hoppema, Mario, Pichevin, Laetitia, Schröder, Michael, Schwarz, Jill Nicola, Stimac, Ingrid, Usbeck, Regina, Webb, Adrian
Format: Article in Journal/Newspaper
Language:English
Published: PANGAEA 2010
Subjects:
CTD/Rosette
MultiCorer
MiniCorer
Multiple investigations
ANT-XX/2
Polarstern
Marine Geochemistry @ AWI AWI_MarGeoChem
Priority Programme 1158 Antarctic Research with Comparable Investigations in Arctic Sea Ice Areas SPP1158
Antarctic
Arctic
Bakker
Regina
Southern Ocean
The Antarctic
Webb
Weddell
Antarc*
Iceberg*
Phytoplankton
Sea ice
Online Access:https://dx.doi.org/10.1594/pangaea.726958
https://doi.pangaea.de/10.1594/PANGAEA.726958
Description
Summary:The Southern Ocean (SO) plays a key role in modulating atmospheric CO2 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. ... : Supplement to: Geibert, Walter; Assmy, Philipp; Bakker, Dorothee C E; Hanfland, Claudia; Hoppema, Mario; Pichevin, Laetitia; Schröder, Michael; Schwarz, Jill Nicola; Stimac, Ingrid; Usbeck, Regina; Webb, Adrian (2010): High productivity in an ice melting hot spot at the eastern boundary of the Weddell Gyre. Global Biogeochemical Cycles, 24, GB3007 ...

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