Latitudinal variations in plankton delta C-13 - Implications for CO2 and productivity in past oceans
Low C-13/C-12 in present-day Antarctic plankton has been ascribed to high CO2 availability. It is reported here, however, that this high-latitude C-13 depletion develops at CO2 partial pressures that are often below that of the present atmosphere and usually below that of equatorial upwelling system...
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ftnasantrs:oai:casi.ntrs.nasa.gov:19900024588 2023-05-15T14:04:33+02:00 Latitudinal variations in plankton delta C-13 - Implications for CO2 and productivity in past oceans Rau, Greg H. Takahashi, Taro Des Marais, David J. Unclassified, Unlimited, Publicly available Oct 12, 1989 http://ntrs.nasa.gov/search.jsp?R=19900024588 unknown http://ntrs.nasa.gov/search.jsp?R=19900024588 Accession ID: 90A11643 Copyright Other Sources 48 Nature; 341; 516-518 1989 ftnasantrs 2012-02-15T18:22:24Z Low C-13/C-12 in present-day Antarctic plankton has been ascribed to high CO2 availability. It is reported here, however, that this high-latitude C-13 depletion develops at CO2 partial pressures that are often below that of the present atmosphere and usually below that of equatorial upwelling systems. Nevertheless, because of much lower water temperatures and hence greater CO2 solubility at high latitude, the preceding pCO2 measurements translate into Antarctic surface-water CO2 (aq) concentrations that are as much as 2.5 times higher than in equatorial waters. It is calculated that an oceanic pCO2 level greater than 800 micro-atm is a warmer low-latitude Cretaceous ocean would have been required to produce the plankton C-13 depletion preserved in Cretaceous sediments. Other/Unknown Material Antarc* Antarctic NASA Technical Reports Server (NTRS) Antarctic |
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NASA Technical Reports Server (NTRS) |
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48 |
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48 Rau, Greg H. Takahashi, Taro Des Marais, David J. Latitudinal variations in plankton delta C-13 - Implications for CO2 and productivity in past oceans |
topic_facet |
48 |
description |
Low C-13/C-12 in present-day Antarctic plankton has been ascribed to high CO2 availability. It is reported here, however, that this high-latitude C-13 depletion develops at CO2 partial pressures that are often below that of the present atmosphere and usually below that of equatorial upwelling systems. Nevertheless, because of much lower water temperatures and hence greater CO2 solubility at high latitude, the preceding pCO2 measurements translate into Antarctic surface-water CO2 (aq) concentrations that are as much as 2.5 times higher than in equatorial waters. It is calculated that an oceanic pCO2 level greater than 800 micro-atm is a warmer low-latitude Cretaceous ocean would have been required to produce the plankton C-13 depletion preserved in Cretaceous sediments. |
format |
Other/Unknown Material |
author |
Rau, Greg H. Takahashi, Taro Des Marais, David J. |
author_facet |
Rau, Greg H. Takahashi, Taro Des Marais, David J. |
author_sort |
Rau, Greg H. |
title |
Latitudinal variations in plankton delta C-13 - Implications for CO2 and productivity in past oceans |
title_short |
Latitudinal variations in plankton delta C-13 - Implications for CO2 and productivity in past oceans |
title_full |
Latitudinal variations in plankton delta C-13 - Implications for CO2 and productivity in past oceans |
title_fullStr |
Latitudinal variations in plankton delta C-13 - Implications for CO2 and productivity in past oceans |
title_full_unstemmed |
Latitudinal variations in plankton delta C-13 - Implications for CO2 and productivity in past oceans |
title_sort |
latitudinal variations in plankton delta c-13 - implications for co2 and productivity in past oceans |
publishDate |
1989 |
url |
http://ntrs.nasa.gov/search.jsp?R=19900024588 |
op_coverage |
Unclassified, Unlimited, Publicly available |
geographic |
Antarctic |
geographic_facet |
Antarctic |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
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Other Sources |
op_relation |
http://ntrs.nasa.gov/search.jsp?R=19900024588 Accession ID: 90A11643 |
op_rights |
Copyright |
_version_ |
1766275734155821056 |