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 (CO 2 ) system in late-summer 2013, the third post-calving summer season....
Published in: | Journal of Geophysical Research: Oceans |
---|---|
Main Authors: | , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Wiley-Blackwell Publishing, Inc.
2017
|
Subjects: | |
Online Access: | https://doi.org/10.1002/2017JC013015 http://ecite.utas.edu.au/124347 |
id |
ftunivtasecite:oai:ecite.utas.edu.au:124347 |
---|---|
record_format |
openpolar |
spelling |
ftunivtasecite:oai:ecite.utas.edu.au:124347 2023-05-15T13:49:03+02:00 Late-summer biogeochemistry in the Mertz Polynya: East Antarctica Shadwick, EH Tilbrook, B Currie, KI 2017 application/pdf https://doi.org/10.1002/2017JC013015 http://ecite.utas.edu.au/124347 en eng Wiley-Blackwell Publishing, Inc. http://ecite.utas.edu.au/124347/1/124347 final.pdf http://dx.doi.org/10.1002/2017JC013015 Shadwick, EH and Tilbrook, B and Currie, KI, Late-summer biogeochemistry in the Mertz Polynya: East Antarctica, Journal of Geophysical Research: Oceans, 122, (9) pp. 7380-7394. ISSN 2169-9275 (2017) [Refereed Article] http://ecite.utas.edu.au/124347 Earth Sciences Oceanography Chemical Oceanography Refereed Article PeerReviewed 2017 ftunivtasecite https://doi.org/10.1002/2017JC013015 2019-12-13T22:23:01Z 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 (CO 2 ) 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 20122013 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 CO 2 due at least in part to the redistribution of sea ice and associated changes in summer surface stratification. Article in Journal/Newspaper Antarc* Antarctica Antarctica Journal East Antarctica Mertz Glacier Sea ice eCite UTAS (University of Tasmania) East Antarctica Mertz Glacier ENVELOPE(144.500,144.500,-67.667,-67.667) Commonwealth Bay ENVELOPE(142.500,142.500,-67.000,-67.000) Mertz Glacier Tongue ENVELOPE(145.500,145.500,-67.167,-67.167) Journal of Geophysical Research: Oceans 122 9 7380 7394 |
institution |
Open Polar |
collection |
eCite UTAS (University of Tasmania) |
op_collection_id |
ftunivtasecite |
language |
English |
topic |
Earth Sciences Oceanography Chemical Oceanography |
spellingShingle |
Earth Sciences Oceanography Chemical Oceanography Shadwick, EH Tilbrook, B Currie, KI Late-summer biogeochemistry in the Mertz Polynya: East Antarctica |
topic_facet |
Earth Sciences Oceanography Chemical Oceanography |
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 (CO 2 ) 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 20122013 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 CO 2 due at least in part to the redistribution of sea ice and associated changes in summer surface stratification. |
format |
Article in Journal/Newspaper |
author |
Shadwick, EH Tilbrook, B Currie, KI |
author_facet |
Shadwick, EH Tilbrook, B Currie, KI |
author_sort |
Shadwick, EH |
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 |
Wiley-Blackwell Publishing, Inc. |
publishDate |
2017 |
url |
https://doi.org/10.1002/2017JC013015 http://ecite.utas.edu.au/124347 |
long_lat |
ENVELOPE(144.500,144.500,-67.667,-67.667) ENVELOPE(142.500,142.500,-67.000,-67.000) ENVELOPE(145.500,145.500,-67.167,-67.167) |
geographic |
East Antarctica Mertz Glacier Commonwealth Bay Mertz Glacier Tongue |
geographic_facet |
East Antarctica Mertz Glacier Commonwealth Bay Mertz Glacier Tongue |
genre |
Antarc* Antarctica Antarctica Journal East Antarctica Mertz Glacier Sea ice |
genre_facet |
Antarc* Antarctica Antarctica Journal East Antarctica Mertz Glacier Sea ice |
op_relation |
http://ecite.utas.edu.au/124347/1/124347 final.pdf http://dx.doi.org/10.1002/2017JC013015 Shadwick, EH and Tilbrook, B and Currie, KI, Late-summer biogeochemistry in the Mertz Polynya: East Antarctica, Journal of Geophysical Research: Oceans, 122, (9) pp. 7380-7394. ISSN 2169-9275 (2017) [Refereed Article] http://ecite.utas.edu.au/124347 |
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_ |
1766250745551650816 |