Heidelberg Academy of Sciences and Humanities, University of Heidelberg
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...
Main Authors: | , , |
---|---|
Other Authors: | |
Format: | Text |
Language: | English |
Published: |
|
Subjects: | |
Online Access: | http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.314.2433 http://arxiv.org/pdf/0803.4440v1.pdf |
id |
ftciteseerx:oai:CiteSeerX.psu:10.1.1.314.2433 |
---|---|
record_format |
openpolar |
spelling |
ftciteseerx:oai:CiteSeerX.psu:10.1.1.314.2433 2023-05-15T16:27:13+02:00 Heidelberg Academy of Sciences and Humanities, University of Heidelberg H. Braun P. Ditlevsen D. R. Chialvo The Pennsylvania State University CiteSeerX Archives 803 application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.314.2433 http://arxiv.org/pdf/0803.4440v1.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.314.2433 http://arxiv.org/pdf/0803.4440v1.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://arxiv.org/pdf/0803.4440v1.pdf text ftciteseerx 2016-01-07T22:40:08Z 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 Greenland North Atlantic Unknown Greenland |
institution |
Open Polar |
collection |
Unknown |
op_collection_id |
ftciteseerx |
language |
English |
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. |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
H. Braun P. Ditlevsen D. R. Chialvo |
spellingShingle |
H. Braun P. Ditlevsen D. R. Chialvo Heidelberg Academy of Sciences and Humanities, University of Heidelberg |
author_facet |
H. Braun P. Ditlevsen D. R. Chialvo |
author_sort |
H. Braun |
title |
Heidelberg Academy of Sciences and Humanities, University of Heidelberg |
title_short |
Heidelberg Academy of Sciences and Humanities, University of Heidelberg |
title_full |
Heidelberg Academy of Sciences and Humanities, University of Heidelberg |
title_fullStr |
Heidelberg Academy of Sciences and Humanities, University of Heidelberg |
title_full_unstemmed |
Heidelberg Academy of Sciences and Humanities, University of Heidelberg |
title_sort |
heidelberg academy of sciences and humanities, university of heidelberg |
publishDate |
|
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.314.2433 http://arxiv.org/pdf/0803.4440v1.pdf |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland North Atlantic |
genre_facet |
Greenland North Atlantic |
op_source |
http://arxiv.org/pdf/0803.4440v1.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.314.2433 http://arxiv.org/pdf/0803.4440v1.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
_version_ |
1766016335706324992 |