On the persistence of cold-season SST anomalies associated with the annular modes
In this study, a simple stochastic climate model is used to examine the impact of the ocean mixed layer depth, surface turbulent energy fluxes, and Ekman currents on the persistence of cold-season extratropical sea surface temperature (SST) anomalies associated with variability in the annular modes...
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American Meteorological Society
2011
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Online Access: | http://nldr.library.ucar.edu/repository/collections/OSGC-000-000-003-791 https://doi.org/10.1175/2010JCLI3535.1 |
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ftncar:oai:drupal-site.org:articles_11578 2023-09-05T13:21:32+02:00 On the persistence of cold-season SST anomalies associated with the annular modes Ciasto, Laura (author) Alexander, Michael (author) Deser, Clara (author) England, Matthew (author) 2011-05-15 application/pdf http://nldr.library.ucar.edu/repository/collections/OSGC-000-000-003-791 https://doi.org/10.1175/2010JCLI3535.1 en eng American Meteorological Society Journal of Climate http://nldr.library.ucar.edu/repository/collections/OSGC-000-000-003-791 doi:10.1175/2010JCLI3535.1 wos: 000290969400006 ark:/85065/d7vq337n Copyright 2011 American Meteorological Society (AMS). Permission to use figures, tables, and brief excerpts from this work in scientific and educational works is hereby granted provided that the source is acknowledged. Any use of material in this work that is determined to be "fair use" under Section 107 or that satisfies the conditions specified in Section 108 of the U.S. Copyright Law (17 USC, as revised by P.L. 94-553) does not require the Society's permission. Republication, systematic reproduction, posting in electronic form on servers, or other uses of this material, except as exempted by the above statements, requires written permission or license from the AMS. Additional details are provided in the AMS Copyright Policies, available from the AMS at 617-227-2425 or amspubs@ametsoc.org. Permission to place a copy of this work on this server has been provided by the AMS. The AMS does not guarantee that the copy provided here is an accurate copy of the published work. Text article 2011 ftncar https://doi.org/10.1175/2010JCLI3535.1 2023-08-14T18:40:16Z In this study, a simple stochastic climate model is used to examine the impact of the ocean mixed layer depth, surface turbulent energy fluxes, and Ekman currents on the persistence of cold-season extratropical sea surface temperature (SST) anomalies associated with variability in the annular modes of atmospheric circulation in both hemispheres. Observational analysis reveals that during the cold season, SST anomalies associated with the southern annular mode (SST(SAM)) persist considerably longer than those associated with the northern annular mode (SST(NAM)). Using the simple model, it is shown that the persistence of the cold-season SST(SAM) is consistent with the simple stochastic climate paradigm in which the atmospheric forcing is approximated as white noise, and the persistence of SST anomalies can be largely determined by the thermal inertia of the ocean mixed layer. In the North Atlantic, however, the simple climate model overestimates the persistence of the cold-season SST(NAM). It is thought that this overestimate occurs because the NAM-related heat flux forcing cannot be described purely as white noise but must also include a feedback from the underlying SST anomalies. Article in Journal/Newspaper North Atlantic OpenSky (NCAR/UCAR - National Center for Atmospheric Research/University Corporation for Atmospheric Research) Journal of Climate 24 10 2500 2515 |
institution |
Open Polar |
collection |
OpenSky (NCAR/UCAR - National Center for Atmospheric Research/University Corporation for Atmospheric Research) |
op_collection_id |
ftncar |
language |
English |
description |
In this study, a simple stochastic climate model is used to examine the impact of the ocean mixed layer depth, surface turbulent energy fluxes, and Ekman currents on the persistence of cold-season extratropical sea surface temperature (SST) anomalies associated with variability in the annular modes of atmospheric circulation in both hemispheres. Observational analysis reveals that during the cold season, SST anomalies associated with the southern annular mode (SST(SAM)) persist considerably longer than those associated with the northern annular mode (SST(NAM)). Using the simple model, it is shown that the persistence of the cold-season SST(SAM) is consistent with the simple stochastic climate paradigm in which the atmospheric forcing is approximated as white noise, and the persistence of SST anomalies can be largely determined by the thermal inertia of the ocean mixed layer. In the North Atlantic, however, the simple climate model overestimates the persistence of the cold-season SST(NAM). It is thought that this overestimate occurs because the NAM-related heat flux forcing cannot be described purely as white noise but must also include a feedback from the underlying SST anomalies. |
author2 |
Ciasto, Laura (author) Alexander, Michael (author) Deser, Clara (author) England, Matthew (author) |
format |
Article in Journal/Newspaper |
title |
On the persistence of cold-season SST anomalies associated with the annular modes |
spellingShingle |
On the persistence of cold-season SST anomalies associated with the annular modes |
title_short |
On the persistence of cold-season SST anomalies associated with the annular modes |
title_full |
On the persistence of cold-season SST anomalies associated with the annular modes |
title_fullStr |
On the persistence of cold-season SST anomalies associated with the annular modes |
title_full_unstemmed |
On the persistence of cold-season SST anomalies associated with the annular modes |
title_sort |
on the persistence of cold-season sst anomalies associated with the annular modes |
publisher |
American Meteorological Society |
publishDate |
2011 |
url |
http://nldr.library.ucar.edu/repository/collections/OSGC-000-000-003-791 https://doi.org/10.1175/2010JCLI3535.1 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_relation |
Journal of Climate http://nldr.library.ucar.edu/repository/collections/OSGC-000-000-003-791 doi:10.1175/2010JCLI3535.1 wos: 000290969400006 ark:/85065/d7vq337n |
op_rights |
Copyright 2011 American Meteorological Society (AMS). Permission to use figures, tables, and brief excerpts from this work in scientific and educational works is hereby granted provided that the source is acknowledged. Any use of material in this work that is determined to be "fair use" under Section 107 or that satisfies the conditions specified in Section 108 of the U.S. Copyright Law (17 USC, as revised by P.L. 94-553) does not require the Society's permission. Republication, systematic reproduction, posting in electronic form on servers, or other uses of this material, except as exempted by the above statements, requires written permission or license from the AMS. Additional details are provided in the AMS Copyright Policies, available from the AMS at 617-227-2425 or amspubs@ametsoc.org. Permission to place a copy of this work on this server has been provided by the AMS. The AMS does not guarantee that the copy provided here is an accurate copy of the published work. |
op_doi |
https://doi.org/10.1175/2010JCLI3535.1 |
container_title |
Journal of Climate |
container_volume |
24 |
container_issue |
10 |
container_start_page |
2500 |
op_container_end_page |
2515 |
_version_ |
1776202135302569984 |