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dc.contributor.authorMoore, G. W. K.  Concept link
dc.contributor.authorRenfrew, Ian A.  Concept link
dc.contributor.authorPickart, Robert S.  Concept link
dc.date.accessioned2013-06-04T20:02:52Z
dc.date.available2014-10-22T08:57:21Z
dc.date.issued2013-04-15
dc.identifier.citationJournal of Climate 26 (2013): 2453–2466en_US
dc.identifier.urihttps://hdl.handle.net/1912/5945
dc.descriptionAuthor Posting. © American Meteorological Society, 2013. This article is posted here by permission of American Meteorological Society for personal use, not for redistribution. The definitive version was published in Journal of Climate 26 (2013): 2453–2466, doi:10.1175/JCLI-D-12-00023.1.en_US
dc.description.abstractThe North Atlantic Oscillation (NAO) is one of the most important modes of variability in the global climate system and is characterized by a meridional dipole in the sea level pressure field, with centers of action near Iceland and the Azores. It has a profound influence on the weather, climate, ecosystems, and economies of Europe, Greenland, eastern North America, and North Africa. It has been proposed that around 1980, there was an eastward secular shift in the NAO’s northern center of action that impacted sea ice export through Fram Strait. Independently, it has also been suggested that the location of its southern center of action is tied to the phase of the NAO. Both of these attributes of the NAO have been linked to anthropogenic climate change. Here the authors use both the one-point correlation map technique as well as empirical orthogonal function (EOF) analysis to show that the meridional dipole that is often seen in the sea level pressure field over the North Atlantic is not purely the result of the NAO (as traditionally defined) but rather arises through an interplay among the NAO and two other leading modes of variability in the North Atlantic region: the East Atlantic (EA) and the Scandinavian (SCA) patterns. This interplay has resulted in multidecadal mobility in the two centers of action of the meridional dipole since the late nineteenth century. In particular, an eastward movement of the dipole has occurred during the 1930s to 1950s as well as more recently. This mobility is not seen in the leading EOF of the sea level pressure field in the region.en_US
dc.description.sponsorshipGWKM was supported by the Natural Sciences and Engineering Research Council of Canada. IAR was supported in part by NE/C003365/1. RSP was supported by Grant OCE-0959381 from the U.S. National Science Foundation.en_US
dc.format.mimetypeapplication/pdf
dc.language.isoen_USen_US
dc.publisherAmerican Meteorological Societyen_US
dc.relation.urihttps://doi.org/10.1175/JCLI-D-12-00023.1
dc.subjectNorth Atlantic Oceanen_US
dc.subjectNorth Atlantic Oscillationen_US
dc.subjectClimate variabilityen_US
dc.subjectClimatologyen_US
dc.subjectEmpirical orthogonal functionsen_US
dc.titleMultidecadal mobility of the North Atlantic Oscillationen_US
dc.typeArticleen_US
dc.description.embargo2013-10-15en_US
dc.identifier.doi10.1175/JCLI-D-12-00023.1


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