Monthly characterization of the tropospheric circulation over the euro-atlantic area in relation with the timing of stratospheric final warmings

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dc.contributor.authorAyarzagüena Porras, Blanca
dc.contributor.authorSerrano Mendoza, Encarnación
dc.date.accessioned2024-01-12T11:27:42Z
dc.date.available2024-01-12T11:27:42Z
dc.date.issued2009-12-01
dc.description.abstractIn recent decades, there has been a growing interest in the study of a possible active role of the stratosphere on the tropospheric climate. However, most studies have focused on this connection in wintertime. This paper deals with the possible relationship between variations in the timing of stratospheric final warmings (SFWs, observed in springtime) and monthly averaged changes in the Euro-Atlantic climate. On the basis of the date on which the SFW occurs, two sets of years have been selected for the period of study (1958–2002): “early years” and “late years,” reflecting a very early or a very late breakup of the polar vortex. The statistical significance of the early-minus-late differences in the analyzed fields has been established by applying a nonparametric test based on a Monte Carlo–like technique. Using data from 40-yr European Centre for Medium-Range Weather Forecasts Re-Analysis (ERA-40), a dynamical study for March and April has shown important differences between both sets of years in stationary waves, especially ultralong ones (waves with k = 1 in March and k = 2 in April). Furthermore, the interannual variations in the stratospheric zonal wind seem to propagate downward as the spring progresses, in such a way that they reach tropospheric levels in April. Relevant differences between “early” and “late” years have been found in tropospheric monthly fields in the Euro-Atlantic area (geopotential, zonal wind, and storm-track activity), being at their most extensive in April.</jats:p>
dc.description.departmentDepto. de Física de la Tierra y Astrofísica
dc.description.facultyFac. de Ciencias Físicas
dc.description.refereedTRUE
dc.description.sponsorshipMinisterio de Educación y Ciencia (España)
dc.description.sponsorshipConsejeria de Educacion de la Comunidad de Madrid
dc.description.sponsorshipEuropean Social Fund
dc.description.statuspub
dc.identifier.citationAyarzagüena, B., and E. Serrano, 2009: Monthly Characterization of the Tropospheric Circulation over the Euro-Atlantic Area in Relation with the Timing of Stratospheric Final Warmings. J. Climate, 22, 6313–6324, https://doi.org/10.1175/2009JCLI2913.1.
dc.identifier.doi10.1175/2009jcli2913.1
dc.identifier.issn1520-0442
dc.identifier.issn0894-8755
dc.identifier.officialurlhttps://journals.ametsoc.org/view/journals/clim/22/23/2009jcli2913.1.xml?tab_body=abstract-display
dc.identifier.urihttps://hdl.handle.net/20.500.14352/92753
dc.issue.number23
dc.journal.titleJournal of Climate
dc.language.isoeng
dc.page.final6324
dc.page.initial6313
dc.publisherAmerican Meteorological Society
dc.relation.projectIDCGL2005-06600-C02
dc.relation.projectIDCGL2008- 06295
dc.rights.accessRightsopen access
dc.subject.cdu551.51
dc.subject.keywordNorthern-hemisphere
dc.subject.keywordPolar vortex
dc.subject.keywordInterannual variability
dc.subject.keywordStorm tracks
dc.subject.keywordDynamics
dc.subject.keywordClimate
dc.subject.keywordPropagation
dc.subject.keywordOrography
dc.subject.keywordVortices
dc.subject.keywordEnsemble
dc.subject.ucmFísica atmosférica
dc.subject.unesco2501.06 Dinámica Atmosférica
dc.titleMonthly characterization of the tropospheric circulation over the euro-atlantic area in relation with the timing of stratospheric final warmings
dc.typejournal article
dc.type.hasVersionVoR
dc.volume.number22
dspace.entity.typePublication
relation.isAuthorOfPublicationafac4741-04ec-4805-9476-53451704e8de
relation.isAuthorOfPublication6d0e1c60-e235-4143-833c-72d4ee4d978c
relation.isAuthorOfPublication.latestForDiscoveryafac4741-04ec-4805-9476-53451704e8de
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