Solar forced Dansgaard-Oeschger events and their phase relation with solar proxies
North Atlantic climate during glacial times was characterized by large-amplitude switchings, the Dansgaard-Oeschger (DO) events, with an apparent tendency to recur preferably in multiples of about 1470 years. Recent work interpreted these intervals as resulting from a subharmonic response of a highl...
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ftdatacite:10.48550/arxiv.0803.4440 2023-05-15T16:00:01+02:00 Solar forced Dansgaard-Oeschger events and their phase relation with solar proxies Braun, H. Ditlevsen, P. Chialvo, D. R. 2008 https://dx.doi.org/10.48550/arxiv.0803.4440 https://arxiv.org/abs/0803.4440 unknown arXiv https://dx.doi.org/10.1029/2008gl033414 arXiv.org perpetual, non-exclusive license http://arxiv.org/licenses/nonexclusive-distrib/1.0/ Geophysics physics.geo-ph Atmospheric and Oceanic Physics physics.ao-ph FOS Physical sciences article-journal Article ScholarlyArticle Text 2008 ftdatacite https://doi.org/10.48550/arxiv.0803.4440 https://doi.org/10.1029/2008gl033414 2022-04-01T15:50:52Z North Atlantic climate during glacial times was characterized by large-amplitude switchings, the Dansgaard-Oeschger (DO) events, with an apparent tendency to recur preferably in multiples of about 1470 years. Recent work interpreted these intervals as resulting from a subharmonic response of a highly nonlinear system to quasi-periodic solar forcing plus noise. This hypothesis was challenged as inconsistent with the observed variability in the phase relation between proxies of solar activity and Greenland climate. Here we reject the claim of inconsistency by showing that this phase variability is a robust, generic feature of the nonlinear dynamics of DO events, as described by a model. This variability is expected from the fact that the events are threshold crossing events, resulting from a cooperative process between the periodic forcing and the noise. This process produces a fluctuating phase relation with the periodic forcing, consistent with proxies of solar activity and Greenland climate. Text Dansgaard-Oeschger events Greenland North Atlantic DataCite Metadata Store (German National Library of Science and Technology) Greenland |
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Open Polar |
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DataCite Metadata Store (German National Library of Science and Technology) |
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ftdatacite |
language |
unknown |
topic |
Geophysics physics.geo-ph Atmospheric and Oceanic Physics physics.ao-ph FOS Physical sciences |
spellingShingle |
Geophysics physics.geo-ph Atmospheric and Oceanic Physics physics.ao-ph FOS Physical sciences Braun, H. Ditlevsen, P. Chialvo, D. R. Solar forced Dansgaard-Oeschger events and their phase relation with solar proxies |
topic_facet |
Geophysics physics.geo-ph Atmospheric and Oceanic Physics physics.ao-ph FOS Physical sciences |
description |
North Atlantic climate during glacial times was characterized by large-amplitude switchings, the Dansgaard-Oeschger (DO) events, with an apparent tendency to recur preferably in multiples of about 1470 years. Recent work interpreted these intervals as resulting from a subharmonic response of a highly nonlinear system to quasi-periodic solar forcing plus noise. This hypothesis was challenged as inconsistent with the observed variability in the phase relation between proxies of solar activity and Greenland climate. Here we reject the claim of inconsistency by showing that this phase variability is a robust, generic feature of the nonlinear dynamics of DO events, as described by a model. This variability is expected from the fact that the events are threshold crossing events, resulting from a cooperative process between the periodic forcing and the noise. This process produces a fluctuating phase relation with the periodic forcing, consistent with proxies of solar activity and Greenland climate. |
format |
Text |
author |
Braun, H. Ditlevsen, P. Chialvo, D. R. |
author_facet |
Braun, H. Ditlevsen, P. Chialvo, D. R. |
author_sort |
Braun, H. |
title |
Solar forced Dansgaard-Oeschger events and their phase relation with solar proxies |
title_short |
Solar forced Dansgaard-Oeschger events and their phase relation with solar proxies |
title_full |
Solar forced Dansgaard-Oeschger events and their phase relation with solar proxies |
title_fullStr |
Solar forced Dansgaard-Oeschger events and their phase relation with solar proxies |
title_full_unstemmed |
Solar forced Dansgaard-Oeschger events and their phase relation with solar proxies |
title_sort |
solar forced dansgaard-oeschger events and their phase relation with solar proxies |
publisher |
arXiv |
publishDate |
2008 |
url |
https://dx.doi.org/10.48550/arxiv.0803.4440 https://arxiv.org/abs/0803.4440 |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Dansgaard-Oeschger events Greenland North Atlantic |
genre_facet |
Dansgaard-Oeschger events Greenland North Atlantic |
op_relation |
https://dx.doi.org/10.1029/2008gl033414 |
op_rights |
arXiv.org perpetual, non-exclusive license http://arxiv.org/licenses/nonexclusive-distrib/1.0/ |
op_doi |
https://doi.org/10.48550/arxiv.0803.4440 https://doi.org/10.1029/2008gl033414 |
_version_ |
1766395899560329216 |