Modeled seasonality of glacial abrupt climate events
Abstract Greenland ice cores, as well as many other paleo-archives from the northern hemisphere, recorded a series of 25 warm interstadial events, the so-called Dansgaard-Oeschger (D-O) events, during the last glacial period. We use the three-dimensional coupled global ocean–atmosphere–sea ice model...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.492.2562 2023-05-15T16:29:20+02:00 Modeled seasonality of glacial abrupt climate events James W. C. White Æ Hans Renssen The Pennsylvania State University CiteSeerX Archives application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.492.2562 http://www.iac.ethz.ch/people/knuttir/papers/flueckiger08cd.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.492.2562 http://www.iac.ethz.ch/people/knuttir/papers/flueckiger08cd.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://www.iac.ethz.ch/people/knuttir/papers/flueckiger08cd.pdf text ftciteseerx 2016-08-14T00:04:26Z Abstract Greenland ice cores, as well as many other paleo-archives from the northern hemisphere, recorded a series of 25 warm interstadial events, the so-called Dansgaard-Oeschger (D-O) events, during the last glacial period. We use the three-dimensional coupled global ocean–atmosphere–sea ice model ECBILT-CLIO and force it with freshwater input into the North Atlantic to simulate abrupt glacial climate events, which we use as analogues for D-O events. We focus our analysis on the Northern Hemisphere. The simulated events show large differences in the regional and seasonal distribution of the temperature and precipitation changes. While the temperature changes in high northern latitudes and in the North Atlantic region are dominated by winter changes, the largest temperature increases in most other land regions are seen in spring. Smallest changes over land are found during the summer months. Our model simulations also demonstrate that the temperature and precipitation change patterns for different intensifications of the Atlantic meridional overturning cir-culation are not linear. The extent of the transitions varies, and local non-linearities influence the amplitude of the annual mean response as well as the response in different seasons. Implications for the interpretation of paleo-records are discussed. Text Greenland Greenland ice cores North Atlantic Sea ice Unknown Greenland |
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Open Polar |
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ftciteseerx |
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English |
description |
Abstract Greenland ice cores, as well as many other paleo-archives from the northern hemisphere, recorded a series of 25 warm interstadial events, the so-called Dansgaard-Oeschger (D-O) events, during the last glacial period. We use the three-dimensional coupled global ocean–atmosphere–sea ice model ECBILT-CLIO and force it with freshwater input into the North Atlantic to simulate abrupt glacial climate events, which we use as analogues for D-O events. We focus our analysis on the Northern Hemisphere. The simulated events show large differences in the regional and seasonal distribution of the temperature and precipitation changes. While the temperature changes in high northern latitudes and in the North Atlantic region are dominated by winter changes, the largest temperature increases in most other land regions are seen in spring. Smallest changes over land are found during the summer months. Our model simulations also demonstrate that the temperature and precipitation change patterns for different intensifications of the Atlantic meridional overturning cir-culation are not linear. The extent of the transitions varies, and local non-linearities influence the amplitude of the annual mean response as well as the response in different seasons. Implications for the interpretation of paleo-records are discussed. |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
James W. C. White Æ Hans Renssen |
spellingShingle |
James W. C. White Æ Hans Renssen Modeled seasonality of glacial abrupt climate events |
author_facet |
James W. C. White Æ Hans Renssen |
author_sort |
James W. C. White |
title |
Modeled seasonality of glacial abrupt climate events |
title_short |
Modeled seasonality of glacial abrupt climate events |
title_full |
Modeled seasonality of glacial abrupt climate events |
title_fullStr |
Modeled seasonality of glacial abrupt climate events |
title_full_unstemmed |
Modeled seasonality of glacial abrupt climate events |
title_sort |
modeled seasonality of glacial abrupt climate events |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.492.2562 http://www.iac.ethz.ch/people/knuttir/papers/flueckiger08cd.pdf |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland Greenland ice cores North Atlantic Sea ice |
genre_facet |
Greenland Greenland ice cores North Atlantic Sea ice |
op_source |
http://www.iac.ethz.ch/people/knuttir/papers/flueckiger08cd.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.492.2562 http://www.iac.ethz.ch/people/knuttir/papers/flueckiger08cd.pdf |
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Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
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1766019032493850624 |