Late-summer biogeochemistry in the Mertz Polynya: East Antarctica
A marked reconfiguration of the Mertz Polynya following the 2010 calving of the Mertz Glacier Tongue has been associated with a decrease in the size and activity of the polynya. We report observations of the oceanic carbonate (CO2) system in late-summer 2013, the third post-calving summer season. Es...
Published in: | Journal of Geophysical Research: Oceans |
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ftwilliammarycol:oai:scholarworks.wm.edu:vimsarticles-1240 2024-06-23T07:46:10+00:00 Late-summer biogeochemistry in the Mertz Polynya: East Antarctica Shadwick, E. H. Tilbrook, B. Currie, K. I. 2017-01-01T08:00:00Z application/pdf https://scholarworks.wm.edu/vimsarticles/241 doi: 10.1002/2017JC013015 https://scholarworks.wm.edu/context/vimsarticles/article/1240/viewcontent/2017JC013015.pdf unknown W&M ScholarWorks https://scholarworks.wm.edu/vimsarticles/241 doi: 10.1002/2017JC013015 https://scholarworks.wm.edu/context/vimsarticles/article/1240/viewcontent/2017JC013015.pdf VIMS Articles CO2 system Mertz Polynya East Antarctica glacier calving ocean sink for CO2 Physical Sciences Peer-Reviewed Articles Marine Biology text 2017 ftwilliammarycol https://doi.org/10.1002/2017JC013015 2024-06-05T03:30:42Z A marked reconfiguration of the Mertz Polynya following the 2010 calving of the Mertz Glacier Tongue has been associated with a decrease in the size and activity of the polynya. We report observations of the oceanic carbonate (CO2) system in late-summer 2013, the third post-calving summer season. Estimates of seasonal net community production (NCP) based on inorganic carbon deficits and the oxygen-argon ratio indicate that the waters on the shelf to the east of Commonwealth Bay (adjacent to the Mertz Glacier) remain productive compared to pre-calving conditions. The input of residual or excess alkalinity from melting sea ice is found to contribute to the seasonal enhancement of carbonate saturation state and pH in shelf waters. Mean rates of NCP in 2012-2013 are more than twice as large as those observed in the pre-calving summers of 2001 and 2008 and suggest that the new (post-calving) configuration of the polynya favors enhanced net community production and a stronger surface ocean sink for atmospheric CO2 due at least in part to the redistribution of sea ice and associated changes in summer surface stratification. Text Antarc* Antarctica East Antarctica Mertz Glacier Sea ice W&M ScholarWorks Commonwealth Bay ENVELOPE(142.500,142.500,-67.000,-67.000) East Antarctica Mertz Glacier ENVELOPE(144.500,144.500,-67.667,-67.667) Mertz Glacier Tongue ENVELOPE(145.500,145.500,-67.167,-67.167) Journal of Geophysical Research: Oceans 122 9 7380 7394 |
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Open Polar |
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W&M ScholarWorks |
op_collection_id |
ftwilliammarycol |
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topic |
CO2 system Mertz Polynya East Antarctica glacier calving ocean sink for CO2 Physical Sciences Peer-Reviewed Articles Marine Biology |
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CO2 system Mertz Polynya East Antarctica glacier calving ocean sink for CO2 Physical Sciences Peer-Reviewed Articles Marine Biology Shadwick, E. H. Tilbrook, B. Currie, K. I. Late-summer biogeochemistry in the Mertz Polynya: East Antarctica |
topic_facet |
CO2 system Mertz Polynya East Antarctica glacier calving ocean sink for CO2 Physical Sciences Peer-Reviewed Articles Marine Biology |
description |
A marked reconfiguration of the Mertz Polynya following the 2010 calving of the Mertz Glacier Tongue has been associated with a decrease in the size and activity of the polynya. We report observations of the oceanic carbonate (CO2) system in late-summer 2013, the third post-calving summer season. Estimates of seasonal net community production (NCP) based on inorganic carbon deficits and the oxygen-argon ratio indicate that the waters on the shelf to the east of Commonwealth Bay (adjacent to the Mertz Glacier) remain productive compared to pre-calving conditions. The input of residual or excess alkalinity from melting sea ice is found to contribute to the seasonal enhancement of carbonate saturation state and pH in shelf waters. Mean rates of NCP in 2012-2013 are more than twice as large as those observed in the pre-calving summers of 2001 and 2008 and suggest that the new (post-calving) configuration of the polynya favors enhanced net community production and a stronger surface ocean sink for atmospheric CO2 due at least in part to the redistribution of sea ice and associated changes in summer surface stratification. |
format |
Text |
author |
Shadwick, E. H. Tilbrook, B. Currie, K. I. |
author_facet |
Shadwick, E. H. Tilbrook, B. Currie, K. I. |
author_sort |
Shadwick, E. H. |
title |
Late-summer biogeochemistry in the Mertz Polynya: East Antarctica |
title_short |
Late-summer biogeochemistry in the Mertz Polynya: East Antarctica |
title_full |
Late-summer biogeochemistry in the Mertz Polynya: East Antarctica |
title_fullStr |
Late-summer biogeochemistry in the Mertz Polynya: East Antarctica |
title_full_unstemmed |
Late-summer biogeochemistry in the Mertz Polynya: East Antarctica |
title_sort |
late-summer biogeochemistry in the mertz polynya: east antarctica |
publisher |
W&M ScholarWorks |
publishDate |
2017 |
url |
https://scholarworks.wm.edu/vimsarticles/241 https://scholarworks.wm.edu/context/vimsarticles/article/1240/viewcontent/2017JC013015.pdf |
long_lat |
ENVELOPE(142.500,142.500,-67.000,-67.000) ENVELOPE(144.500,144.500,-67.667,-67.667) ENVELOPE(145.500,145.500,-67.167,-67.167) |
geographic |
Commonwealth Bay East Antarctica Mertz Glacier Mertz Glacier Tongue |
geographic_facet |
Commonwealth Bay East Antarctica Mertz Glacier Mertz Glacier Tongue |
genre |
Antarc* Antarctica East Antarctica Mertz Glacier Sea ice |
genre_facet |
Antarc* Antarctica East Antarctica Mertz Glacier Sea ice |
op_source |
VIMS Articles |
op_relation |
https://scholarworks.wm.edu/vimsarticles/241 doi: 10.1002/2017JC013015 https://scholarworks.wm.edu/context/vimsarticles/article/1240/viewcontent/2017JC013015.pdf |
op_doi |
https://doi.org/10.1002/2017JC013015 |
container_title |
Journal of Geophysical Research: Oceans |
container_volume |
122 |
container_issue |
9 |
container_start_page |
7380 |
op_container_end_page |
7394 |
_version_ |
1802644320816201728 |