data assimilation
Abstract. An ensemble of simulations of the climate of the past millennium conducted with a three-dimensional climate model of intermediate complexity are constrained to follow temperature histories obtained from a recent compilation of well-calibrated surface temperature proxies using a simple data...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.408.3298 2023-05-15T14:46:38+02:00 data assimilation E. Crespin H. Goosse T. Fichefet M. E. Mann The Pennsylvania State University CiteSeerX Archives 2009 application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.408.3298 http://www.meteo.psu.edu/holocene/public_html/shared/articles/Crespinetal-CP09.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.408.3298 http://www.meteo.psu.edu/holocene/public_html/shared/articles/Crespinetal-CP09.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://www.meteo.psu.edu/holocene/public_html/shared/articles/Crespinetal-CP09.pdf text 2009 ftciteseerx 2016-01-08T03:09:29Z Abstract. An ensemble of simulations of the climate of the past millennium conducted with a three-dimensional climate model of intermediate complexity are constrained to follow temperature histories obtained from a recent compilation of well-calibrated surface temperature proxies using a simple data assimilation technique. Those simulations provide a reconstruction of the climate of the Arctic that is compatible with the model physics, the forcing applied and the proxy records. Available observational data, proxybased reconstructions and our model results suggest that the Arctic climate is characterized by substantial variations in surface temperature over the past millennium. Though the most recent decades are likely to be the warmest of the past millennium, we find evidence for substantial past warming episodes in the Arctic. In particular, our model reconstructions show a prominent warm event during the period 1470– 1520. This warm period is likely related to the internal variability of the climate system, that is the variability present in the absence of any change in external forcing. We examine the roles of competing mechanisms that could potentially produce this anomaly. This study leads us to conclude that changes in atmospheric circulation, through enhanced southwesterly winds towards northern Europe, Siberia and Canada, are likely the main cause of the late 15th/early 16th century Arctic warming. Text Arctic Siberia Unknown Arctic Canada |
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English |
description |
Abstract. An ensemble of simulations of the climate of the past millennium conducted with a three-dimensional climate model of intermediate complexity are constrained to follow temperature histories obtained from a recent compilation of well-calibrated surface temperature proxies using a simple data assimilation technique. Those simulations provide a reconstruction of the climate of the Arctic that is compatible with the model physics, the forcing applied and the proxy records. Available observational data, proxybased reconstructions and our model results suggest that the Arctic climate is characterized by substantial variations in surface temperature over the past millennium. Though the most recent decades are likely to be the warmest of the past millennium, we find evidence for substantial past warming episodes in the Arctic. In particular, our model reconstructions show a prominent warm event during the period 1470– 1520. This warm period is likely related to the internal variability of the climate system, that is the variability present in the absence of any change in external forcing. We examine the roles of competing mechanisms that could potentially produce this anomaly. This study leads us to conclude that changes in atmospheric circulation, through enhanced southwesterly winds towards northern Europe, Siberia and Canada, are likely the main cause of the late 15th/early 16th century Arctic warming. |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
E. Crespin H. Goosse T. Fichefet M. E. Mann |
spellingShingle |
E. Crespin H. Goosse T. Fichefet M. E. Mann data assimilation |
author_facet |
E. Crespin H. Goosse T. Fichefet M. E. Mann |
author_sort |
E. Crespin |
title |
data assimilation |
title_short |
data assimilation |
title_full |
data assimilation |
title_fullStr |
data assimilation |
title_full_unstemmed |
data assimilation |
title_sort |
data assimilation |
publishDate |
2009 |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.408.3298 http://www.meteo.psu.edu/holocene/public_html/shared/articles/Crespinetal-CP09.pdf |
geographic |
Arctic Canada |
geographic_facet |
Arctic Canada |
genre |
Arctic Siberia |
genre_facet |
Arctic Siberia |
op_source |
http://www.meteo.psu.edu/holocene/public_html/shared/articles/Crespinetal-CP09.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.408.3298 http://www.meteo.psu.edu/holocene/public_html/shared/articles/Crespinetal-CP09.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
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1766317837648920576 |