6336 JOURNAL OF CLIMATE VOLUME 23 Warming of Global Abyssal and Deep Southern Ocean Waters between the 1990s and 2000s: Contributions to Global Heat and Sea Level Rise Budgets*
Abyssal global and deep Southern Ocean temperature trends are quantified between the 1990s and 2000s to assess the role of recent warming of these regions in global heat and sea level budgets. The authors 1) compute warming rates with uncertainties along 28 full-depth, high-quality hydrographic sect...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.395.1048 2023-05-15T14:01:16+02:00 6336 JOURNAL OF CLIMATE VOLUME 23 Warming of Global Abyssal and Deep Southern Ocean Waters between the 1990s and 2000s: Contributions to Global Heat and Sea Level Rise Budgets* Sarah G. Purkey Gregory C. Johnson The Pennsylvania State University CiteSeerX Archives 2010 application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.395.1048 http://uwpcc.washington.edu/documents/PCC/purkeyjohnson_2010.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.395.1048 http://uwpcc.washington.edu/documents/PCC/purkeyjohnson_2010.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://uwpcc.washington.edu/documents/PCC/purkeyjohnson_2010.pdf text 2010 ftciteseerx 2016-01-08T02:26:09Z Abyssal global and deep Southern Ocean temperature trends are quantified between the 1990s and 2000s to assess the role of recent warming of these regions in global heat and sea level budgets. The authors 1) compute warming rates with uncertainties along 28 full-depth, high-quality hydrographic sections that have been occupied two or more times between 1980 and 2010; 2) divide the global ocean into 32 basins, defined by the topography and climatological ocean bottom temperatures; and then 3) estimate temperature trends in the 24 sampled basins. The three southernmost basins show a strong statistically significant abyssal warming trend, with that warming signal weakening to the north in the central Pacific, western Atlantic, and eastern Indian Oceans. Eastern Atlantic and western Indian Ocean basins show statistically insignificant abyssal cooling trends. Excepting the Arctic Ocean and Nordic seas, the rate of abyssal (below 4000 m) global ocean heat content change in the 1990s and 2000s is equivalent to a heat flux of 0.027 (60.009) W m 22 applied over the entire surface of the earth. Deep (1000–4000 m) warming south of the Subantarctic Front of the Antarctic Circumpolar Current adds 0.068 (60.062) W m 22. The abyssal warming produces a 0.053 (60.017) mm yr 21 increase in global average sea level and the deep warming south of the Subantarctic Front adds another 0.093 (60.081) mm yr 21. Thus, warming in these regions, ventilated primarily by Antarctic Bottom Water, accounts for a statistically significant fraction of the present global energy and sea level budgets. 1. Text Antarc* Antarctic Arctic Arctic Ocean Nordic Seas Southern Ocean Unknown Antarctic Arctic Arctic Ocean Indian Pacific Southern Ocean The Antarctic |
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ftciteseerx |
language |
English |
description |
Abyssal global and deep Southern Ocean temperature trends are quantified between the 1990s and 2000s to assess the role of recent warming of these regions in global heat and sea level budgets. The authors 1) compute warming rates with uncertainties along 28 full-depth, high-quality hydrographic sections that have been occupied two or more times between 1980 and 2010; 2) divide the global ocean into 32 basins, defined by the topography and climatological ocean bottom temperatures; and then 3) estimate temperature trends in the 24 sampled basins. The three southernmost basins show a strong statistically significant abyssal warming trend, with that warming signal weakening to the north in the central Pacific, western Atlantic, and eastern Indian Oceans. Eastern Atlantic and western Indian Ocean basins show statistically insignificant abyssal cooling trends. Excepting the Arctic Ocean and Nordic seas, the rate of abyssal (below 4000 m) global ocean heat content change in the 1990s and 2000s is equivalent to a heat flux of 0.027 (60.009) W m 22 applied over the entire surface of the earth. Deep (1000–4000 m) warming south of the Subantarctic Front of the Antarctic Circumpolar Current adds 0.068 (60.062) W m 22. The abyssal warming produces a 0.053 (60.017) mm yr 21 increase in global average sea level and the deep warming south of the Subantarctic Front adds another 0.093 (60.081) mm yr 21. Thus, warming in these regions, ventilated primarily by Antarctic Bottom Water, accounts for a statistically significant fraction of the present global energy and sea level budgets. 1. |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Sarah G. Purkey Gregory C. Johnson |
spellingShingle |
Sarah G. Purkey Gregory C. Johnson 6336 JOURNAL OF CLIMATE VOLUME 23 Warming of Global Abyssal and Deep Southern Ocean Waters between the 1990s and 2000s: Contributions to Global Heat and Sea Level Rise Budgets* |
author_facet |
Sarah G. Purkey Gregory C. Johnson |
author_sort |
Sarah G. Purkey |
title |
6336 JOURNAL OF CLIMATE VOLUME 23 Warming of Global Abyssal and Deep Southern Ocean Waters between the 1990s and 2000s: Contributions to Global Heat and Sea Level Rise Budgets* |
title_short |
6336 JOURNAL OF CLIMATE VOLUME 23 Warming of Global Abyssal and Deep Southern Ocean Waters between the 1990s and 2000s: Contributions to Global Heat and Sea Level Rise Budgets* |
title_full |
6336 JOURNAL OF CLIMATE VOLUME 23 Warming of Global Abyssal and Deep Southern Ocean Waters between the 1990s and 2000s: Contributions to Global Heat and Sea Level Rise Budgets* |
title_fullStr |
6336 JOURNAL OF CLIMATE VOLUME 23 Warming of Global Abyssal and Deep Southern Ocean Waters between the 1990s and 2000s: Contributions to Global Heat and Sea Level Rise Budgets* |
title_full_unstemmed |
6336 JOURNAL OF CLIMATE VOLUME 23 Warming of Global Abyssal and Deep Southern Ocean Waters between the 1990s and 2000s: Contributions to Global Heat and Sea Level Rise Budgets* |
title_sort |
6336 journal of climate volume 23 warming of global abyssal and deep southern ocean waters between the 1990s and 2000s: contributions to global heat and sea level rise budgets* |
publishDate |
2010 |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.395.1048 http://uwpcc.washington.edu/documents/PCC/purkeyjohnson_2010.pdf |
geographic |
Antarctic Arctic Arctic Ocean Indian Pacific Southern Ocean The Antarctic |
geographic_facet |
Antarctic Arctic Arctic Ocean Indian Pacific Southern Ocean The Antarctic |
genre |
Antarc* Antarctic Arctic Arctic Ocean Nordic Seas Southern Ocean |
genre_facet |
Antarc* Antarctic Arctic Arctic Ocean Nordic Seas Southern Ocean |
op_source |
http://uwpcc.washington.edu/documents/PCC/purkeyjohnson_2010.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.395.1048 http://uwpcc.washington.edu/documents/PCC/purkeyjohnson_2010.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
_version_ |
1766270855126450176 |