Defining the internal component of Atlantic multidecadal variability in a changing climate
The canonical index of "Atlantic Multidecadal Variability" (AMV) is the low-pass filtered timeseries of sea surface temperature anomalies (SSTA) averaged over the North Atlantic. This index and its associated SSTA spatial pattern confound externally forced climate change and internally gen...
Published in: | Geophysical Research Letters |
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2021
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Online Access: | https://doi.org/10.1029/2021GL095023 |
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ftncar:oai:drupal-site.org:articles_24883 2024-04-28T08:30:28+00:00 Defining the internal component of Atlantic multidecadal variability in a changing climate Deser, Clara (author) Phillips, Adam S. (author) 2021-11-28 https://doi.org/10.1029/2021GL095023 en eng Geophysical Research Letters--Geophys Res Lett--0094-8276--1944-8007 articles:24883 doi:10.1029/2021GL095023 ark:/85065/d78g8q5d Copyright 2021 American Geophysical Union. article Text 2021 ftncar https://doi.org/10.1029/2021GL095023 2024-04-04T17:35:13Z The canonical index of "Atlantic Multidecadal Variability" (AMV) is the low-pass filtered timeseries of sea surface temperature anomalies (SSTA) averaged over the North Atlantic. This index and its associated SSTA spatial pattern confound externally forced climate change and internally generated climate variability. The internal component of AMV is commonly isolated by either subtracting the global-mean SSTA or removing the pattern of SSTA associated with the global-mean. This study evaluates the skill of each method with regard to the spatial pattern of internal AMV, using nine coupled model Large Ensembles over the period 1940-2100 as a testbed in which the true internal AMV is known a priori. The first method aliases the structure of forced climate change onto internal AMV, while the second method is generally robust to climate change. The models simulate realistic patterns of internal AMV, although such an assessment is hampered by the brevity of the observational record. 1852977 Article in Journal/Newspaper North Atlantic OpenSky (NCAR/UCAR - National Center for Atmospheric Research/University Corporation for Atmospheric Research) Geophysical Research Letters 48 22 |
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 canonical index of "Atlantic Multidecadal Variability" (AMV) is the low-pass filtered timeseries of sea surface temperature anomalies (SSTA) averaged over the North Atlantic. This index and its associated SSTA spatial pattern confound externally forced climate change and internally generated climate variability. The internal component of AMV is commonly isolated by either subtracting the global-mean SSTA or removing the pattern of SSTA associated with the global-mean. This study evaluates the skill of each method with regard to the spatial pattern of internal AMV, using nine coupled model Large Ensembles over the period 1940-2100 as a testbed in which the true internal AMV is known a priori. The first method aliases the structure of forced climate change onto internal AMV, while the second method is generally robust to climate change. The models simulate realistic patterns of internal AMV, although such an assessment is hampered by the brevity of the observational record. 1852977 |
author2 |
Deser, Clara (author) Phillips, Adam S. (author) |
format |
Article in Journal/Newspaper |
title |
Defining the internal component of Atlantic multidecadal variability in a changing climate |
spellingShingle |
Defining the internal component of Atlantic multidecadal variability in a changing climate |
title_short |
Defining the internal component of Atlantic multidecadal variability in a changing climate |
title_full |
Defining the internal component of Atlantic multidecadal variability in a changing climate |
title_fullStr |
Defining the internal component of Atlantic multidecadal variability in a changing climate |
title_full_unstemmed |
Defining the internal component of Atlantic multidecadal variability in a changing climate |
title_sort |
defining the internal component of atlantic multidecadal variability in a changing climate |
publishDate |
2021 |
url |
https://doi.org/10.1029/2021GL095023 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_relation |
Geophysical Research Letters--Geophys Res Lett--0094-8276--1944-8007 articles:24883 doi:10.1029/2021GL095023 ark:/85065/d78g8q5d |
op_rights |
Copyright 2021 American Geophysical Union. |
op_doi |
https://doi.org/10.1029/2021GL095023 |
container_title |
Geophysical Research Letters |
container_volume |
48 |
container_issue |
22 |
_version_ |
1797588331267096576 |