The Northeast Water polynya as an atmospheric CO2 sink: a seasonal rectification hypothesis
During the multidisciplinary ‘NEW92’ cruise of the United States Coast Guard Cutter (USCGC) Polar Sea to the recurrent Northeast Water (NEW) Polynya (77–81°N, 6–17°W; July–August 1992), total dissolved inorganic carbon and total alkalinity in the water column were measured with high precision to det...
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AGU (American Geophysical Union)
1995
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ftoceanrep:oai:oceanrep.geomar.de:3326 2023-05-15T15:09:23+02:00 The Northeast Water polynya as an atmospheric CO2 sink: a seasonal rectification hypothesis Yager, P. L. Wallace, Douglas W.R. Johnson, K. M. Smith, W. O. Deming, J. D. 1995 text https://oceanrep.geomar.de/id/eprint/3326/ https://oceanrep.geomar.de/id/eprint/3326/1/Yager_Wallace%281995%29.pdf https://doi.org/10.1029/94JC01962 en eng AGU (American Geophysical Union) https://oceanrep.geomar.de/id/eprint/3326/1/Yager_Wallace%281995%29.pdf Yager, P. L., Wallace, D. W. R., Johnson, K. M., Smith, W. O. and Deming, J. D. (1995) The Northeast Water polynya as an atmospheric CO2 sink: a seasonal rectification hypothesis. Open Access Journal of Geophysical Research: Oceans, 100 . pp. 4389-4398. DOI 10.1029/94JC01962 <https://doi.org/10.1029/94JC01962>. doi:10.1029/94JC01962 info:eu-repo/semantics/openAccess Article PeerReviewed 1995 ftoceanrep https://doi.org/10.1029/94JC01962 2023-04-07T14:47:34Z During the multidisciplinary ‘NEW92’ cruise of the United States Coast Guard Cutter (USCGC) Polar Sea to the recurrent Northeast Water (NEW) Polynya (77–81°N, 6–17°W; July–August 1992), total dissolved inorganic carbon and total alkalinity in the water column were measured with high precision to determine the quantitative impact of biological processes on the regional air-sea flux of carbon. Biological processes depleted the total inorganic carbon of summer surface waters by up to 2 mol C m−2 or about 3%. On a regional basis this depletion correlated with depth-integrated values of chlorophyll a, particulate organic carbon, and the inorganic nitrogen deficit. Replacement of this carbon through exchange with the atmosphere was stalled owing to the low wind speeds during the month of the cruise, although model calculations indicate that the depletion could be replenished by a few weeks of strong winds before ice forms in the autumn. These measurements and observations allowed formulation of a new hypothesis whereby seasonally ice-covered regions like the NEW Polynya promote a unique biologically and physically mediated “rectification” of the typical (ice free, low latitude) seasonal cycle of air-sea CO2 flux. The resulting carbon sink is consistent with other productivity estimates and represents an export of biologically cycled carbon either to local sediments or offshore. If this scenario is representative of seasonally ice-covered Arctic shelves, then the rectification process could provide a small, negative feedback to excess atmospheric CO2. Article in Journal/Newspaper Arctic OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) Arctic Journal of Geophysical Research 100 C3 4389 |
institution |
Open Polar |
collection |
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
op_collection_id |
ftoceanrep |
language |
English |
description |
During the multidisciplinary ‘NEW92’ cruise of the United States Coast Guard Cutter (USCGC) Polar Sea to the recurrent Northeast Water (NEW) Polynya (77–81°N, 6–17°W; July–August 1992), total dissolved inorganic carbon and total alkalinity in the water column were measured with high precision to determine the quantitative impact of biological processes on the regional air-sea flux of carbon. Biological processes depleted the total inorganic carbon of summer surface waters by up to 2 mol C m−2 or about 3%. On a regional basis this depletion correlated with depth-integrated values of chlorophyll a, particulate organic carbon, and the inorganic nitrogen deficit. Replacement of this carbon through exchange with the atmosphere was stalled owing to the low wind speeds during the month of the cruise, although model calculations indicate that the depletion could be replenished by a few weeks of strong winds before ice forms in the autumn. These measurements and observations allowed formulation of a new hypothesis whereby seasonally ice-covered regions like the NEW Polynya promote a unique biologically and physically mediated “rectification” of the typical (ice free, low latitude) seasonal cycle of air-sea CO2 flux. The resulting carbon sink is consistent with other productivity estimates and represents an export of biologically cycled carbon either to local sediments or offshore. If this scenario is representative of seasonally ice-covered Arctic shelves, then the rectification process could provide a small, negative feedback to excess atmospheric CO2. |
format |
Article in Journal/Newspaper |
author |
Yager, P. L. Wallace, Douglas W.R. Johnson, K. M. Smith, W. O. Deming, J. D. |
spellingShingle |
Yager, P. L. Wallace, Douglas W.R. Johnson, K. M. Smith, W. O. Deming, J. D. The Northeast Water polynya as an atmospheric CO2 sink: a seasonal rectification hypothesis |
author_facet |
Yager, P. L. Wallace, Douglas W.R. Johnson, K. M. Smith, W. O. Deming, J. D. |
author_sort |
Yager, P. L. |
title |
The Northeast Water polynya as an atmospheric CO2 sink: a seasonal rectification hypothesis |
title_short |
The Northeast Water polynya as an atmospheric CO2 sink: a seasonal rectification hypothesis |
title_full |
The Northeast Water polynya as an atmospheric CO2 sink: a seasonal rectification hypothesis |
title_fullStr |
The Northeast Water polynya as an atmospheric CO2 sink: a seasonal rectification hypothesis |
title_full_unstemmed |
The Northeast Water polynya as an atmospheric CO2 sink: a seasonal rectification hypothesis |
title_sort |
northeast water polynya as an atmospheric co2 sink: a seasonal rectification hypothesis |
publisher |
AGU (American Geophysical Union) |
publishDate |
1995 |
url |
https://oceanrep.geomar.de/id/eprint/3326/ https://oceanrep.geomar.de/id/eprint/3326/1/Yager_Wallace%281995%29.pdf https://doi.org/10.1029/94JC01962 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic |
genre_facet |
Arctic |
op_relation |
https://oceanrep.geomar.de/id/eprint/3326/1/Yager_Wallace%281995%29.pdf Yager, P. L., Wallace, D. W. R., Johnson, K. M., Smith, W. O. and Deming, J. D. (1995) The Northeast Water polynya as an atmospheric CO2 sink: a seasonal rectification hypothesis. Open Access Journal of Geophysical Research: Oceans, 100 . pp. 4389-4398. DOI 10.1029/94JC01962 <https://doi.org/10.1029/94JC01962>. doi:10.1029/94JC01962 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1029/94JC01962 |
container_title |
Journal of Geophysical Research |
container_volume |
100 |
container_issue |
C3 |
container_start_page |
4389 |
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1766340598077325312 |