Deglacial abrupt climate changes: not simply a freshwater problem
Imposing freshwater flux (FWF) variations in the North Atlantic is an effective method to cause reorganizations of the Atlantic Meridional Overturning Circulation (AMOC) in climate models. Through this approach, models have been able to reproduce the abrupt climate changes of the last glacial period...
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fttriple:oai:gotriple.eu:10670/1.8p4eoz 2023-05-15T17:32:52+02:00 Deglacial abrupt climate changes: not simply a freshwater problem Alvarez-Solas, Jorge Montoya, Marisa Robinson, Alexander 2019-09-16 https://doi.org/10.5194/cp-2019-96 https://cp.copernicus.org/preprints/cp-2019-96/ en eng doi:10.5194/cp-2019-96 10670/1.8p4eoz https://cp.copernicus.org/preprints/cp-2019-96/ undefined Geographica Helvetica - geography eISSN: 1814-9332 geo hist Text https://vocabularies.coar-repositories.org/resource_types/c_18cf/ 2019 fttriple https://doi.org/10.5194/cp-2019-96 2023-01-22T18:34:50Z Imposing freshwater flux (FWF) variations in the North Atlantic is an effective method to cause reorganizations of the Atlantic Meridional Overturning Circulation (AMOC) in climate models. Through this approach, models have been able to reproduce the abrupt climate changes of the last glacial period. Such exercises have been useful for gaining insight into a wealth of processes regarding the widespread climatic consequences of AMOC variations. However, an issue that has passed unnoticed is the fact that the timing of the FWF applied in these studies is inconsistent with reconstructions. Here we focus on the deglaciation to show that imposing a FWF that is derived from the sea-level record results in a simulated AMOC evolution in a poor fit with the data, revealing an inconsistency between the generally accepted FWF mechanism and the resulting climatic impacts. Based on these negative results, we propose that the trigger of deglacial abrupt climate changes is not yet fully identified and that mechanisms other than FWF forcing should be explored more than ever. Text North Atlantic Unknown |
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geo hist Alvarez-Solas, Jorge Montoya, Marisa Robinson, Alexander Deglacial abrupt climate changes: not simply a freshwater problem |
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geo hist |
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Imposing freshwater flux (FWF) variations in the North Atlantic is an effective method to cause reorganizations of the Atlantic Meridional Overturning Circulation (AMOC) in climate models. Through this approach, models have been able to reproduce the abrupt climate changes of the last glacial period. Such exercises have been useful for gaining insight into a wealth of processes regarding the widespread climatic consequences of AMOC variations. However, an issue that has passed unnoticed is the fact that the timing of the FWF applied in these studies is inconsistent with reconstructions. Here we focus on the deglaciation to show that imposing a FWF that is derived from the sea-level record results in a simulated AMOC evolution in a poor fit with the data, revealing an inconsistency between the generally accepted FWF mechanism and the resulting climatic impacts. Based on these negative results, we propose that the trigger of deglacial abrupt climate changes is not yet fully identified and that mechanisms other than FWF forcing should be explored more than ever. |
format |
Text |
author |
Alvarez-Solas, Jorge Montoya, Marisa Robinson, Alexander |
author_facet |
Alvarez-Solas, Jorge Montoya, Marisa Robinson, Alexander |
author_sort |
Alvarez-Solas, Jorge |
title |
Deglacial abrupt climate changes: not simply a freshwater problem |
title_short |
Deglacial abrupt climate changes: not simply a freshwater problem |
title_full |
Deglacial abrupt climate changes: not simply a freshwater problem |
title_fullStr |
Deglacial abrupt climate changes: not simply a freshwater problem |
title_full_unstemmed |
Deglacial abrupt climate changes: not simply a freshwater problem |
title_sort |
deglacial abrupt climate changes: not simply a freshwater problem |
publishDate |
2019 |
url |
https://doi.org/10.5194/cp-2019-96 https://cp.copernicus.org/preprints/cp-2019-96/ |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
Geographica Helvetica - geography eISSN: 1814-9332 |
op_relation |
doi:10.5194/cp-2019-96 10670/1.8p4eoz https://cp.copernicus.org/preprints/cp-2019-96/ |
op_rights |
undefined |
op_doi |
https://doi.org/10.5194/cp-2019-96 |
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1766131156322877440 |