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dc.contributor.author
Solman, Silvina Alicia
dc.contributor.author
Orlanski, Isidoro
dc.date.available
2017-06-08T19:32:38Z
dc.date.issued
2016-03
dc.identifier.citation
Solman, Silvina Alicia; Orlanski, Isidoro; Climate change over the extratropical southern hemisphere: the tale from an ensemble of reanalysis datasets; American Meteorological Society; Journal Of Climate; 29; 5; 3-2016; 1673-1687
dc.identifier.issn
0894-8755
dc.identifier.uri
http://hdl.handle.net/11336/17808
dc.description.abstract
In this study, a set of five reanalysis datasets [ERA-Interim, NCEP–DOE AMIP-II reanalysis (R2), MERRA, the Twentieth Century Reanalysis (20CR), and the CFS Reanalysis (CFSR)] is used to provide a robust estimation of precipitation change in the middle-to-high latitudes of the Southern Hemisphere during the last three decades. Based on several metrics accounting for the eddy activity and moisture availability, an attempt is also made to identify the dynamical mechanisms triggering these changes during extended summer and winter seasons. To that aim, a weighted reanalysis ensemble is built using the inverse of the variance as weighting factors for each variable. Results showed that the weighted reanalysis ensemble reproduced the observed precipitation changes at high and middle latitudes during the two seasons, as depicted by the GPCP dataset. For the extended summer season, precipitation changes were dynamically consistent with changes in the eddy activity, attributed mostly to ozone depletion. For the extended winter season, the eddy activity and moisture availability both contributed to the precipitation changes, with the increased concentration of greenhouse gases being the main driver of the climate change signal. In addition, output from a five-member ensemble of the high-resolution GFDL CM2.5 for the period 1979– 2010 was used in order to explore the capability of the model in reproducing both the observed precipitation change and the underlying dynamical mechanisms. The model was able to capture the rainfall change signal. However, the increased availability of moisture from the lower levels controls the precipitation change during both summer and winter.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
American Meteorological Society
dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
Climate Change
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Southern Hemisphere
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Reanalysis
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Ensemble
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Investigación Climatológica
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Ciencias de la Tierra y relacionadas con el Medio Ambiente
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CIENCIAS NATURALES Y EXACTAS
dc.title
Climate change over the extratropical southern hemisphere: the tale from an ensemble of reanalysis datasets
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2017-06-07T20:47:38Z
dc.journal.volume
29
dc.journal.number
5
dc.journal.pagination
1673-1687
dc.journal.pais
Estados Unidos
dc.journal.ciudad
Massachusetts
dc.description.fil
Fil: Solman, Silvina Alicia. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Centro de Investigaciones del Mar y la Atmosfera. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Centro de Investigaciones del Mar y la Atmosfera; Argentina
dc.description.fil
Fil: Orlanski, Isidoro. University of Princeton; Estados Unidos
dc.journal.title
Journal Of Climate
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/http://dx.doi.org/10.1175/JCLI-D-15-0588.1
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/http://journals.ametsoc.org/doi/10.1175/JCLI-D-15-0588.1
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