The role of forcing and internal dynamics in explaining the Medieval Climate Anomaly
Proxy reconstructions suggest that peak global temperature during the past warm interval known as the Medieval Climate Anomaly (MCA, roughly 950–1250 AD) has been exceeded only during the most recent decades. To better understand the origin of this warm period, we use model simulations constrained...
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ftunivlouvain:oai:dial.uclouvain.be:boreal:119140 2024-05-19T07:36:13+00:00 The role of forcing and internal dynamics in explaining the Medieval Climate Anomaly Goosse, Hugues Crespin, Elisabeth Dubinkina, Svetlana Loutre, Marie-France UCL - SST/ELI/ELIC - Earth & Climate 2012 http://hdl.handle.net/2078.1/119140 https://doi.org/10.1007/s00382-012-1297-0 eng eng Springer boreal:119140 http://hdl.handle.net/2078.1/119140 doi:10.1007/s00382-012-1297-0 urn:ISSN:0930-7575 urn:EISSN:1432-0894 info:eu-repo/semantics/restrictedAccess Climate Dynamics, Vol. 39, p. 2847-2866 (2012) Paleoclimate Last millennium Medieval Climate Anomaly Climate modelling Data assimilation Atmospheric and ocean dynamics Radiative forcing CISM : CECI 1443 info:eu-repo/semantics/article 2012 ftunivlouvain https://doi.org/10.1007/s00382-012-1297-0 2024-04-24T01:40:09Z Proxy reconstructions suggest that peak global temperature during the past warm interval known as the Medieval Climate Anomaly (MCA, roughly 950–1250 AD) has been exceeded only during the most recent decades. To better understand the origin of this warm period, we use model simulations constrained by data assimilation establishing the spatial pattern of temperature changes that is most consistent with forcing estimates, model physics and the empirical information contained in paleoclimate proxy records. These numerical experiments demonstrate that the reconstructed spatial temperature pattern of the MCA can be explained by a simple thermodynamical response of the climate system to relatively weak changes in radiative forcing combined with a modification of the atmospheric circulation, displaying some similarities with the positive phase of the so-called Arctic Oscillation, and with northward shifts in the position of the Gulf Stream and Kuroshio currents. The mechanisms underlying the MCA are thus quite different from anthropogenic mechanisms responsible for modern global warming. Article in Journal/Newspaper Arctic Global warming DIAL@UCLouvain (Université catholique de Louvain) Climate Dynamics 39 12 2847 2866 |
institution |
Open Polar |
collection |
DIAL@UCLouvain (Université catholique de Louvain) |
op_collection_id |
ftunivlouvain |
language |
English |
topic |
Paleoclimate Last millennium Medieval Climate Anomaly Climate modelling Data assimilation Atmospheric and ocean dynamics Radiative forcing CISM : CECI 1443 |
spellingShingle |
Paleoclimate Last millennium Medieval Climate Anomaly Climate modelling Data assimilation Atmospheric and ocean dynamics Radiative forcing CISM : CECI 1443 Goosse, Hugues Crespin, Elisabeth Dubinkina, Svetlana Loutre, Marie-France The role of forcing and internal dynamics in explaining the Medieval Climate Anomaly |
topic_facet |
Paleoclimate Last millennium Medieval Climate Anomaly Climate modelling Data assimilation Atmospheric and ocean dynamics Radiative forcing CISM : CECI 1443 |
description |
Proxy reconstructions suggest that peak global temperature during the past warm interval known as the Medieval Climate Anomaly (MCA, roughly 950–1250 AD) has been exceeded only during the most recent decades. To better understand the origin of this warm period, we use model simulations constrained by data assimilation establishing the spatial pattern of temperature changes that is most consistent with forcing estimates, model physics and the empirical information contained in paleoclimate proxy records. These numerical experiments demonstrate that the reconstructed spatial temperature pattern of the MCA can be explained by a simple thermodynamical response of the climate system to relatively weak changes in radiative forcing combined with a modification of the atmospheric circulation, displaying some similarities with the positive phase of the so-called Arctic Oscillation, and with northward shifts in the position of the Gulf Stream and Kuroshio currents. The mechanisms underlying the MCA are thus quite different from anthropogenic mechanisms responsible for modern global warming. |
author2 |
UCL - SST/ELI/ELIC - Earth & Climate |
format |
Article in Journal/Newspaper |
author |
Goosse, Hugues Crespin, Elisabeth Dubinkina, Svetlana Loutre, Marie-France |
author_facet |
Goosse, Hugues Crespin, Elisabeth Dubinkina, Svetlana Loutre, Marie-France |
author_sort |
Goosse, Hugues |
title |
The role of forcing and internal dynamics in explaining the Medieval Climate Anomaly |
title_short |
The role of forcing and internal dynamics in explaining the Medieval Climate Anomaly |
title_full |
The role of forcing and internal dynamics in explaining the Medieval Climate Anomaly |
title_fullStr |
The role of forcing and internal dynamics in explaining the Medieval Climate Anomaly |
title_full_unstemmed |
The role of forcing and internal dynamics in explaining the Medieval Climate Anomaly |
title_sort |
role of forcing and internal dynamics in explaining the medieval climate anomaly |
publisher |
Springer |
publishDate |
2012 |
url |
http://hdl.handle.net/2078.1/119140 https://doi.org/10.1007/s00382-012-1297-0 |
genre |
Arctic Global warming |
genre_facet |
Arctic Global warming |
op_source |
Climate Dynamics, Vol. 39, p. 2847-2866 (2012) |
op_relation |
boreal:119140 http://hdl.handle.net/2078.1/119140 doi:10.1007/s00382-012-1297-0 urn:ISSN:0930-7575 urn:EISSN:1432-0894 |
op_rights |
info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.1007/s00382-012-1297-0 |
container_title |
Climate Dynamics |
container_volume |
39 |
container_issue |
12 |
container_start_page |
2847 |
op_container_end_page |
2866 |
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1799475310702362624 |