Radiocarbon as a thermocline proxy for the eastern equatorial Pacific
An ocean model is used to test the idea that sea surface ?14C behaves as a thermocline proxy in the eastern equatorial Pacific. The ORCA2 model, which includes ?14C as a passive tracer, has been forced with reanalysis fluxes over 1948–1999, and the output is compared with a previously reported Galap...
Published in: | Geophysical Research Letters |
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2004
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ftsouthampton:oai:eprints.soton.ac.uk:64807 2023-07-30T03:58:17+02:00 Radiocarbon as a thermocline proxy for the eastern equatorial Pacific Rodgers, Keith B. Aumont, Olivier Madec, Gurvan Menkes, Christophe Blanke, Bruno Monfray, Patrick Orr, James C. Schrag, Daniel P. 2004-07-30 https://eprints.soton.ac.uk/64807/ http://www.agu.org/pubs/crossref/2004/2004GL019764.shtml unknown Rodgers, Keith B., Aumont, Olivier, Madec, Gurvan, Menkes, Christophe, Blanke, Bruno, Monfray, Patrick, Orr, James C. and Schrag, Daniel P. (2004) Radiocarbon as a thermocline proxy for the eastern equatorial Pacific. Geophysical Research Letters, 31, L14314. (doi:10.1029/2004GL019764 <http://dx.doi.org/10.1029/2004GL019764>). Article PeerReviewed 2004 ftsouthampton https://doi.org/10.1029/2004GL019764 2023-07-09T21:04:21Z An ocean model is used to test the idea that sea surface ?14C behaves as a thermocline proxy in the eastern equatorial Pacific. The ORCA2 model, which includes ?14C as a passive tracer, has been forced with reanalysis fluxes over 1948–1999, and the output is compared with a previously reported Galapagos ?14C record. The model reproduces the abrupt increase in the seasonally minimum ?14C in 1976/77 found in the data. This increase is associated with neither a shift of thermocline depth over the NINO3 region, nor a change in the relative proportion of Northern/Southern source waters. Rather, it is due to a decrease in the Sub-Antarctic Mode Water (SAMW) component of the upwelling water, thereby representing a decrease in entrainment of water from below the base of the directly ventilated thermocline. Article in Journal/Newspaper Antarc* Antarctic University of Southampton: e-Prints Soton Antarctic Galapagos Pacific Geophysical Research Letters 31 14 |
institution |
Open Polar |
collection |
University of Southampton: e-Prints Soton |
op_collection_id |
ftsouthampton |
language |
unknown |
description |
An ocean model is used to test the idea that sea surface ?14C behaves as a thermocline proxy in the eastern equatorial Pacific. The ORCA2 model, which includes ?14C as a passive tracer, has been forced with reanalysis fluxes over 1948–1999, and the output is compared with a previously reported Galapagos ?14C record. The model reproduces the abrupt increase in the seasonally minimum ?14C in 1976/77 found in the data. This increase is associated with neither a shift of thermocline depth over the NINO3 region, nor a change in the relative proportion of Northern/Southern source waters. Rather, it is due to a decrease in the Sub-Antarctic Mode Water (SAMW) component of the upwelling water, thereby representing a decrease in entrainment of water from below the base of the directly ventilated thermocline. |
format |
Article in Journal/Newspaper |
author |
Rodgers, Keith B. Aumont, Olivier Madec, Gurvan Menkes, Christophe Blanke, Bruno Monfray, Patrick Orr, James C. Schrag, Daniel P. |
spellingShingle |
Rodgers, Keith B. Aumont, Olivier Madec, Gurvan Menkes, Christophe Blanke, Bruno Monfray, Patrick Orr, James C. Schrag, Daniel P. Radiocarbon as a thermocline proxy for the eastern equatorial Pacific |
author_facet |
Rodgers, Keith B. Aumont, Olivier Madec, Gurvan Menkes, Christophe Blanke, Bruno Monfray, Patrick Orr, James C. Schrag, Daniel P. |
author_sort |
Rodgers, Keith B. |
title |
Radiocarbon as a thermocline proxy for the eastern equatorial Pacific |
title_short |
Radiocarbon as a thermocline proxy for the eastern equatorial Pacific |
title_full |
Radiocarbon as a thermocline proxy for the eastern equatorial Pacific |
title_fullStr |
Radiocarbon as a thermocline proxy for the eastern equatorial Pacific |
title_full_unstemmed |
Radiocarbon as a thermocline proxy for the eastern equatorial Pacific |
title_sort |
radiocarbon as a thermocline proxy for the eastern equatorial pacific |
publishDate |
2004 |
url |
https://eprints.soton.ac.uk/64807/ http://www.agu.org/pubs/crossref/2004/2004GL019764.shtml |
geographic |
Antarctic Galapagos Pacific |
geographic_facet |
Antarctic Galapagos Pacific |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_relation |
Rodgers, Keith B., Aumont, Olivier, Madec, Gurvan, Menkes, Christophe, Blanke, Bruno, Monfray, Patrick, Orr, James C. and Schrag, Daniel P. (2004) Radiocarbon as a thermocline proxy for the eastern equatorial Pacific. Geophysical Research Letters, 31, L14314. (doi:10.1029/2004GL019764 <http://dx.doi.org/10.1029/2004GL019764>). |
op_doi |
https://doi.org/10.1029/2004GL019764 |
container_title |
Geophysical Research Letters |
container_volume |
31 |
container_issue |
14 |
_version_ |
1772821126858145792 |