q 1999 American Meteorological Society Rotated Global Modes of Non-ENSO Sea Surface Temperature Variability
A varimax rotation was applied to the EOF modes of global SST derived by Enfield and Mestas-Nuñez. The SST anomaly record is more than a century long, with a global complex EOF representation of ENSO and a linear trend removed at every grid point. The rotated EOF modes capture localized centers of...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.536.2899 2023-05-15T17:35:36+02:00 q 1999 American Meteorological Society Rotated Global Modes of Non-ENSO Sea Surface Temperature Variability Alberto M. Mestas-nun Ez David B. Enfield The Pennsylvania State University CiteSeerX Archives 1998 application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.536.2899 http://www.aoml.noaa.gov/phod/docs/gmsst2.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.536.2899 http://www.aoml.noaa.gov/phod/docs/gmsst2.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://www.aoml.noaa.gov/phod/docs/gmsst2.pdf text 1998 ftciteseerx 2016-01-08T10:49:49Z A varimax rotation was applied to the EOF modes of global SST derived by Enfield and Mestas-Nuñez. The SST anomaly record is more than a century long, with a global complex EOF representation of ENSO and a linear trend removed at every grid point. The rotated EOF modes capture localized centers of variability that contribute to the larger-scale spatial patterns of the unrotated modes. The first rotated EOF represents a mul-tidecadal signal with larger response in the North Atlantic. The second rotated EOF represents an interdecadal fluctuation with larger response in the eastern North Pacific and out of phase fluctuations of smaller amplitude in the central North Pacific. The third rotated EOF captures interdecadal fluctuations in the eastern tropical Pacific with a dominant peak that coincides with the 1982/83 ENSO. The fourth rotated EOF has interdecadal to multidecadal nature with larger response in the central equatorial Pacific and quasi-symmetric out-of-phase response in the western North and South Pacific. The fifth mode represents multidecadal fluctuations with large response at about 408N in the North Pacific. The sixth mode has interannual to interdecadal timescales with largest response confined to the South Atlantic. The authors ’ rotated modes are dominated by intra- rather than interocean fluctuations supporting the hypothesis that the non-ENSO variability is more regional than global in nature. Analyses of sea level pressure and surface wind stress show that in general the non-ENSO rotated EOFs are consistent with an ocean response to local atmospheric forcing. An exception is the eastern tropical Pacific mode, which is more consistent with an atmospheric response to changes in the ocean SST. 1. Text North Atlantic Unknown Pacific |
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description |
A varimax rotation was applied to the EOF modes of global SST derived by Enfield and Mestas-Nuñez. The SST anomaly record is more than a century long, with a global complex EOF representation of ENSO and a linear trend removed at every grid point. The rotated EOF modes capture localized centers of variability that contribute to the larger-scale spatial patterns of the unrotated modes. The first rotated EOF represents a mul-tidecadal signal with larger response in the North Atlantic. The second rotated EOF represents an interdecadal fluctuation with larger response in the eastern North Pacific and out of phase fluctuations of smaller amplitude in the central North Pacific. The third rotated EOF captures interdecadal fluctuations in the eastern tropical Pacific with a dominant peak that coincides with the 1982/83 ENSO. The fourth rotated EOF has interdecadal to multidecadal nature with larger response in the central equatorial Pacific and quasi-symmetric out-of-phase response in the western North and South Pacific. The fifth mode represents multidecadal fluctuations with large response at about 408N in the North Pacific. The sixth mode has interannual to interdecadal timescales with largest response confined to the South Atlantic. The authors ’ rotated modes are dominated by intra- rather than interocean fluctuations supporting the hypothesis that the non-ENSO variability is more regional than global in nature. Analyses of sea level pressure and surface wind stress show that in general the non-ENSO rotated EOFs are consistent with an ocean response to local atmospheric forcing. An exception is the eastern tropical Pacific mode, which is more consistent with an atmospheric response to changes in the ocean SST. 1. |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Alberto M. Mestas-nun Ez David B. Enfield |
spellingShingle |
Alberto M. Mestas-nun Ez David B. Enfield q 1999 American Meteorological Society Rotated Global Modes of Non-ENSO Sea Surface Temperature Variability |
author_facet |
Alberto M. Mestas-nun Ez David B. Enfield |
author_sort |
Alberto M. Mestas-nun Ez |
title |
q 1999 American Meteorological Society Rotated Global Modes of Non-ENSO Sea Surface Temperature Variability |
title_short |
q 1999 American Meteorological Society Rotated Global Modes of Non-ENSO Sea Surface Temperature Variability |
title_full |
q 1999 American Meteorological Society Rotated Global Modes of Non-ENSO Sea Surface Temperature Variability |
title_fullStr |
q 1999 American Meteorological Society Rotated Global Modes of Non-ENSO Sea Surface Temperature Variability |
title_full_unstemmed |
q 1999 American Meteorological Society Rotated Global Modes of Non-ENSO Sea Surface Temperature Variability |
title_sort |
q 1999 american meteorological society rotated global modes of non-enso sea surface temperature variability |
publishDate |
1998 |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.536.2899 http://www.aoml.noaa.gov/phod/docs/gmsst2.pdf |
geographic |
Pacific |
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Pacific |
genre |
North Atlantic |
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North Atlantic |
op_source |
http://www.aoml.noaa.gov/phod/docs/gmsst2.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.536.2899 http://www.aoml.noaa.gov/phod/docs/gmsst2.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
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1766134818923347968 |