Surface changes in the North Atlantic meridional overturning circulation during the last millennium
Despite numerous investigations, the dynamical origins of the Medieval Climate Anomaly and the Little Ice Age remain uncertain. A major unresolved issue relating to internal climate dynamics is the mode and tempo of Atlantic meridional overturning circulation variability, and the significance of dec...
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ftiowastateuniv:oai:lib.dr.iastate.edu:ge_at_pubs-1227 2023-05-15T15:04:04+02:00 Surface changes in the North Atlantic meridional overturning circulation during the last millennium Wanamaker, Alan D. Butler, Paul G. Scourse, James D. Heinemeier, Jan Eiríksson, Jón Knudsen, Karen Luise Richardson, Christopher A. 2012-06-12T07:00:00Z application/pdf https://lib.dr.iastate.edu/ge_at_pubs/221 https://lib.dr.iastate.edu/cgi/viewcontent.cgi?article=1227&context=ge_at_pubs en eng Iowa State University Digital Repository https://lib.dr.iastate.edu/ge_at_pubs/221 https://lib.dr.iastate.edu/cgi/viewcontent.cgi?article=1227&context=ge_at_pubs http://creativecommons.org/licenses/by/3.0/ CC-BY Geological and Atmospheric Sciences Publications Atmospheric Sciences Climate Oceanography text 2012 ftiowastateuniv 2021-08-28T22:47:35Z Despite numerous investigations, the dynamical origins of the Medieval Climate Anomaly and the Little Ice Age remain uncertain. A major unresolved issue relating to internal climate dynamics is the mode and tempo of Atlantic meridional overturning circulation variability, and the significance of decadal-to-centennial scale changes in Atlantic meridional overturning circulation strength in regulating the climate of the last millennium. Here we use the time-constrained high-resolution local radiocarbon reservoir age offset derived from an absolutely dated annually resolved shell chronology spanning the past 1,350 years, to reconstruct changes in surface ocean circulation and climate. The water mass tracer data presented here from the North Icelandic shelf, combined with previously published data from the Arctic and subtropical Atlantic, show that surface Atlantic meridional overturning circulation dynamics likely amplified the relatively warm conditions during the Medieval Climate Anomaly and the relatively cool conditions during the Little Ice Age within the North Atlantic sector. Text Arctic North Atlantic Digital Repository @ Iowa State University Arctic |
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Open Polar |
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Digital Repository @ Iowa State University |
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ftiowastateuniv |
language |
English |
topic |
Atmospheric Sciences Climate Oceanography |
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Atmospheric Sciences Climate Oceanography Wanamaker, Alan D. Butler, Paul G. Scourse, James D. Heinemeier, Jan Eiríksson, Jón Knudsen, Karen Luise Richardson, Christopher A. Surface changes in the North Atlantic meridional overturning circulation during the last millennium |
topic_facet |
Atmospheric Sciences Climate Oceanography |
description |
Despite numerous investigations, the dynamical origins of the Medieval Climate Anomaly and the Little Ice Age remain uncertain. A major unresolved issue relating to internal climate dynamics is the mode and tempo of Atlantic meridional overturning circulation variability, and the significance of decadal-to-centennial scale changes in Atlantic meridional overturning circulation strength in regulating the climate of the last millennium. Here we use the time-constrained high-resolution local radiocarbon reservoir age offset derived from an absolutely dated annually resolved shell chronology spanning the past 1,350 years, to reconstruct changes in surface ocean circulation and climate. The water mass tracer data presented here from the North Icelandic shelf, combined with previously published data from the Arctic and subtropical Atlantic, show that surface Atlantic meridional overturning circulation dynamics likely amplified the relatively warm conditions during the Medieval Climate Anomaly and the relatively cool conditions during the Little Ice Age within the North Atlantic sector. |
format |
Text |
author |
Wanamaker, Alan D. Butler, Paul G. Scourse, James D. Heinemeier, Jan Eiríksson, Jón Knudsen, Karen Luise Richardson, Christopher A. |
author_facet |
Wanamaker, Alan D. Butler, Paul G. Scourse, James D. Heinemeier, Jan Eiríksson, Jón Knudsen, Karen Luise Richardson, Christopher A. |
author_sort |
Wanamaker, Alan D. |
title |
Surface changes in the North Atlantic meridional overturning circulation during the last millennium |
title_short |
Surface changes in the North Atlantic meridional overturning circulation during the last millennium |
title_full |
Surface changes in the North Atlantic meridional overturning circulation during the last millennium |
title_fullStr |
Surface changes in the North Atlantic meridional overturning circulation during the last millennium |
title_full_unstemmed |
Surface changes in the North Atlantic meridional overturning circulation during the last millennium |
title_sort |
surface changes in the north atlantic meridional overturning circulation during the last millennium |
publisher |
Iowa State University Digital Repository |
publishDate |
2012 |
url |
https://lib.dr.iastate.edu/ge_at_pubs/221 https://lib.dr.iastate.edu/cgi/viewcontent.cgi?article=1227&context=ge_at_pubs |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic North Atlantic |
genre_facet |
Arctic North Atlantic |
op_source |
Geological and Atmospheric Sciences Publications |
op_relation |
https://lib.dr.iastate.edu/ge_at_pubs/221 https://lib.dr.iastate.edu/cgi/viewcontent.cgi?article=1227&context=ge_at_pubs |
op_rights |
http://creativecommons.org/licenses/by/3.0/ |
op_rightsnorm |
CC-BY |
_version_ |
1766335883435311104 |