Particulate organic matter delta C-13 variations across the Drake Passage
Particulate organic matter (POM) was sampled during two cruise transects across the Drake Passage during March 1986 to investigate the unusual C-13 depletion in high-latitude Southern Ocean plankton. This POM delta C-13 transition from -23.2 o/oo at 53.3 deg S to values as low as -30.3 o/oo at above...
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1991
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ftnasantrs:oai:casi.ntrs.nasa.gov:19910063774 2023-05-15T16:02:27+02:00 Particulate organic matter delta C-13 variations across the Drake Passage Rau, G. H. Takahashi, T. Des Marais, D. J. Sullivan, C. W. Unclassified, Unlimited, Publicly available Aug 15, 1991 http://ntrs.nasa.gov/search.jsp?R=19910063774 unknown http://ntrs.nasa.gov/search.jsp?R=19910063774 Accession ID: 91A48397 Copyright Other Sources 48 Journal of Geophysical Research; 96; 15 1991 ftnasantrs 2012-02-15T19:05:38Z Particulate organic matter (POM) was sampled during two cruise transects across the Drake Passage during March 1986 to investigate the unusual C-13 depletion in high-latitude Southern Ocean plankton. This POM delta C-13 transition from -23.2 o/oo at 53.3 deg S to values as low as -30.3 o/oo at above 62 deg S does not track previously reported abrupt changes in water chemistry and plankton species composition associated with the Polar Front Zone. The north-south isotopic trend is not accompanied by significant changes in POM carbon or nitrogen concentrations, or in POM C/N. Differences in plankton standing crop or biochemistry (e.g. lipid content) do not appear responsible for the isotopic trends observed. The latitudinal change in POM delta C-13 is highly correlated with water temperature and with the calculated concentration of CO2 (aq) at equilibrium with atmospheric CO2. These observations are consistent with the hypothesis that CO2 (aq) significantly influences POM delta C-13 in ocean surface waters. Other/Unknown Material Drake Passage Southern Ocean NASA Technical Reports Server (NTRS) Drake Passage Southern Ocean |
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Open Polar |
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NASA Technical Reports Server (NTRS) |
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ftnasantrs |
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unknown |
topic |
48 |
spellingShingle |
48 Rau, G. H. Takahashi, T. Des Marais, D. J. Sullivan, C. W. Particulate organic matter delta C-13 variations across the Drake Passage |
topic_facet |
48 |
description |
Particulate organic matter (POM) was sampled during two cruise transects across the Drake Passage during March 1986 to investigate the unusual C-13 depletion in high-latitude Southern Ocean plankton. This POM delta C-13 transition from -23.2 o/oo at 53.3 deg S to values as low as -30.3 o/oo at above 62 deg S does not track previously reported abrupt changes in water chemistry and plankton species composition associated with the Polar Front Zone. The north-south isotopic trend is not accompanied by significant changes in POM carbon or nitrogen concentrations, or in POM C/N. Differences in plankton standing crop or biochemistry (e.g. lipid content) do not appear responsible for the isotopic trends observed. The latitudinal change in POM delta C-13 is highly correlated with water temperature and with the calculated concentration of CO2 (aq) at equilibrium with atmospheric CO2. These observations are consistent with the hypothesis that CO2 (aq) significantly influences POM delta C-13 in ocean surface waters. |
format |
Other/Unknown Material |
author |
Rau, G. H. Takahashi, T. Des Marais, D. J. Sullivan, C. W. |
author_facet |
Rau, G. H. Takahashi, T. Des Marais, D. J. Sullivan, C. W. |
author_sort |
Rau, G. H. |
title |
Particulate organic matter delta C-13 variations across the Drake Passage |
title_short |
Particulate organic matter delta C-13 variations across the Drake Passage |
title_full |
Particulate organic matter delta C-13 variations across the Drake Passage |
title_fullStr |
Particulate organic matter delta C-13 variations across the Drake Passage |
title_full_unstemmed |
Particulate organic matter delta C-13 variations across the Drake Passage |
title_sort |
particulate organic matter delta c-13 variations across the drake passage |
publishDate |
1991 |
url |
http://ntrs.nasa.gov/search.jsp?R=19910063774 |
op_coverage |
Unclassified, Unlimited, Publicly available |
geographic |
Drake Passage Southern Ocean |
geographic_facet |
Drake Passage Southern Ocean |
genre |
Drake Passage Southern Ocean |
genre_facet |
Drake Passage Southern Ocean |
op_source |
Other Sources |
op_relation |
http://ntrs.nasa.gov/search.jsp?R=19910063774 Accession ID: 91A48397 |
op_rights |
Copyright |
_version_ |
1766398056905834496 |