Numerical aspects of applying the fluctuation dissipation theorem to study climate system sensitivity to external forcings
The fluctuation dissipation theorem (FDT), a classical result coming from statistical mechanics, suggests that, under certain conditions, the system response to external forcing can be obtained using the statistics of natural fluctuation of the system. The application of the FDT to the most sophisti...
Published in: | Russian Journal of Numerical Analysis and Mathematical Modelling |
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Language: | English |
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Online Access: | https://doi.org/10.1515/rnam-2016-0032 |
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ftncar:oai:drupal-site.org:articles_19447 2023-07-30T04:05:25+02:00 Numerical aspects of applying the fluctuation dissipation theorem to study climate system sensitivity to external forcings Gritsun, Andrey (author) Branstator, Grant (author) 2016-01-01 https://doi.org/10.1515/rnam-2016-0032 en eng Russian Journal of Numerical Analysis and Mathematical Modelling--1569-3988--0927-6467 articles:19447 ark:/85065/d7bz67tt doi:10.1515/rnam-2016-0032 Copyright 2017 by Walter de Gruyter GmbH. article Text 2016 ftncar https://doi.org/10.1515/rnam-2016-0032 2023-07-17T18:34:06Z The fluctuation dissipation theorem (FDT), a classical result coming from statistical mechanics, suggests that, under certain conditions, the system response to external forcing can be obtained using the statistics of natural fluctuation of the system. The application of the FDT to the most sophisticated climate models and the real climate system represents a difficult problem due to the huge dimensionality of these systems and the lack of the data available for proper sampling of the system natural variability. As a con sequence, one has to use some regularization procedures constraining the form of permitted perturbations. Naturally, the skill of the FDT depends on the type and parameters of the regularization procedure. In the present paper we apply FDT to predict the response of a recent version of the NCAR climate system model (CCSM4) to salinity and temperature forcing anomalies in the North Atlantic. We study the sensitivity of our results to the amount of available data and to key parameters used in our numerical algorithm. OCE1243015 Article in Journal/Newspaper North Atlantic OpenSky (NCAR/UCAR - National Center for Atmospheric Research/University Corporation for Atmospheric Research) Russian Journal of Numerical Analysis and Mathematical Modelling 31 6 |
institution |
Open Polar |
collection |
OpenSky (NCAR/UCAR - National Center for Atmospheric Research/University Corporation for Atmospheric Research) |
op_collection_id |
ftncar |
language |
English |
description |
The fluctuation dissipation theorem (FDT), a classical result coming from statistical mechanics, suggests that, under certain conditions, the system response to external forcing can be obtained using the statistics of natural fluctuation of the system. The application of the FDT to the most sophisticated climate models and the real climate system represents a difficult problem due to the huge dimensionality of these systems and the lack of the data available for proper sampling of the system natural variability. As a con sequence, one has to use some regularization procedures constraining the form of permitted perturbations. Naturally, the skill of the FDT depends on the type and parameters of the regularization procedure. In the present paper we apply FDT to predict the response of a recent version of the NCAR climate system model (CCSM4) to salinity and temperature forcing anomalies in the North Atlantic. We study the sensitivity of our results to the amount of available data and to key parameters used in our numerical algorithm. OCE1243015 |
author2 |
Gritsun, Andrey (author) Branstator, Grant (author) |
format |
Article in Journal/Newspaper |
title |
Numerical aspects of applying the fluctuation dissipation theorem to study climate system sensitivity to external forcings |
spellingShingle |
Numerical aspects of applying the fluctuation dissipation theorem to study climate system sensitivity to external forcings |
title_short |
Numerical aspects of applying the fluctuation dissipation theorem to study climate system sensitivity to external forcings |
title_full |
Numerical aspects of applying the fluctuation dissipation theorem to study climate system sensitivity to external forcings |
title_fullStr |
Numerical aspects of applying the fluctuation dissipation theorem to study climate system sensitivity to external forcings |
title_full_unstemmed |
Numerical aspects of applying the fluctuation dissipation theorem to study climate system sensitivity to external forcings |
title_sort |
numerical aspects of applying the fluctuation dissipation theorem to study climate system sensitivity to external forcings |
publishDate |
2016 |
url |
https://doi.org/10.1515/rnam-2016-0032 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_relation |
Russian Journal of Numerical Analysis and Mathematical Modelling--1569-3988--0927-6467 articles:19447 ark:/85065/d7bz67tt doi:10.1515/rnam-2016-0032 |
op_rights |
Copyright 2017 by Walter de Gruyter GmbH. |
op_doi |
https://doi.org/10.1515/rnam-2016-0032 |
container_title |
Russian Journal of Numerical Analysis and Mathematical Modelling |
container_volume |
31 |
container_issue |
6 |
_version_ |
1772817302608150528 |