Rates of thermohaline recovery from freshwater pulses in modern, Last Glacial Maximum, and greenhouse warming climates
Recovery rates of the thermohaline circulation after a freshwater pulse in the North Atlantic vary consider-ably depending on the background climate, as demon-strated in the Community Climate System Model. The recovery is slowest in a Last Glacial Maximum (LGM) climate, fastest in a modern climate,...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.522.3272 2023-05-15T17:29:28+02:00 Rates of thermohaline recovery from freshwater pulses in modern, Last Glacial Maximum, and greenhouse warming climates C. M. Bitz J. C. H. Chiang W. Cheng J. J. Barsugli The Pennsylvania State University CiteSeerX Archives 2007 application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.522.3272 http://www.atmos.washington.edu/~bitz/basicstate_preprint.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.522.3272 http://www.atmos.washington.edu/~bitz/basicstate_preprint.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://www.atmos.washington.edu/~bitz/basicstate_preprint.pdf text 2007 ftciteseerx 2016-01-08T10:11:57Z Recovery rates of the thermohaline circulation after a freshwater pulse in the North Atlantic vary consider-ably depending on the background climate, as demon-strated in the Community Climate System Model. The recovery is slowest in a Last Glacial Maximum (LGM) climate, fastest in a modern climate, and intermedi-ate between the two in a greenhouse warming (4XCO2) climate. Previously proposed mechanisms to explain thermohaline circulation stability involving altered hor-izontal freshwater transport in the North Atlantic are consistent with relative recovery rates in the modern and 4XCO2 climates, but fail to explain the slow LGM recovery. Instead, sea ice expansion inhibits deep-water formation after freshening in the LGM climate by re-ducing heat loss to the atmosphere and providing addi-tional surface freshwater. In addition, anomalous verti-cal freshwater transport across ∼1km depth after fresh-ening is most effective at weakening the stratification in the modern case but is negligible in the LGM case. 1. Text North Atlantic Sea ice Unknown |
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English |
description |
Recovery rates of the thermohaline circulation after a freshwater pulse in the North Atlantic vary consider-ably depending on the background climate, as demon-strated in the Community Climate System Model. The recovery is slowest in a Last Glacial Maximum (LGM) climate, fastest in a modern climate, and intermedi-ate between the two in a greenhouse warming (4XCO2) climate. Previously proposed mechanisms to explain thermohaline circulation stability involving altered hor-izontal freshwater transport in the North Atlantic are consistent with relative recovery rates in the modern and 4XCO2 climates, but fail to explain the slow LGM recovery. Instead, sea ice expansion inhibits deep-water formation after freshening in the LGM climate by re-ducing heat loss to the atmosphere and providing addi-tional surface freshwater. In addition, anomalous verti-cal freshwater transport across ∼1km depth after fresh-ening is most effective at weakening the stratification in the modern case but is negligible in the LGM case. 1. |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
C. M. Bitz J. C. H. Chiang W. Cheng J. J. Barsugli |
spellingShingle |
C. M. Bitz J. C. H. Chiang W. Cheng J. J. Barsugli Rates of thermohaline recovery from freshwater pulses in modern, Last Glacial Maximum, and greenhouse warming climates |
author_facet |
C. M. Bitz J. C. H. Chiang W. Cheng J. J. Barsugli |
author_sort |
C. M. Bitz |
title |
Rates of thermohaline recovery from freshwater pulses in modern, Last Glacial Maximum, and greenhouse warming climates |
title_short |
Rates of thermohaline recovery from freshwater pulses in modern, Last Glacial Maximum, and greenhouse warming climates |
title_full |
Rates of thermohaline recovery from freshwater pulses in modern, Last Glacial Maximum, and greenhouse warming climates |
title_fullStr |
Rates of thermohaline recovery from freshwater pulses in modern, Last Glacial Maximum, and greenhouse warming climates |
title_full_unstemmed |
Rates of thermohaline recovery from freshwater pulses in modern, Last Glacial Maximum, and greenhouse warming climates |
title_sort |
rates of thermohaline recovery from freshwater pulses in modern, last glacial maximum, and greenhouse warming climates |
publishDate |
2007 |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.522.3272 http://www.atmos.washington.edu/~bitz/basicstate_preprint.pdf |
genre |
North Atlantic Sea ice |
genre_facet |
North Atlantic Sea ice |
op_source |
http://www.atmos.washington.edu/~bitz/basicstate_preprint.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.522.3272 http://www.atmos.washington.edu/~bitz/basicstate_preprint.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
_version_ |
1766123605208334336 |