Artículo

Haylock, M.R.; Peterson, T.C.; Alves, L.M.; Ambrizzi, T.; Anunciação, Y.M.T.; Baez, J.; Barros, V.R.; Berlato, M.A.; Bidegain, M.; Coronel, G.; Corradi, V.; Garcia, V.J.; Grimm, A.M.; Karoly, D.; Marengo, J.A.; Marino, M.B.; Moncunill, D.F.; Nechet, D. (...) Vincent, L.A. "Trends in total and extreme South American rainfall in 1960-2000 and links with sea surface temperature" (2006) Journal of Climate. 19(8):1490-1512
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Abstract:

A weeklong workshop in Brazil in August 2004 provided the opportunity for 28 scientists from southern South America to examine daily rainfall observations to determine changes in both total and extreme rainfall. Twelve annual indices of daily rainfall were calculated over the period 1960 to 2000, examining changes to both the entire distribution as well as the extremes. Maps of trends in the 12 rainfall indices showed large regions of coherent change, with many stations showing statistically significant changes in some of the indices. The pattern of trends for the extremes was generally the same as that for total annual rainfall, with a change to wetter conditions in Ecuador and northern Peru and the region of southern Brazil, Paraguay, Uruguay, and northern and central Argentina. A decrease was observed in southern Peru and southern Chile, with the latter showing significant decreases in many indices. A canonical correlation analysis between each of the indices and sea surface temperatures (SSTs) revealed two large-scale patterns that have contributed to the observed trends in the rainfall indices. A coupled pattern with ENSO-like SST loadings and rainfall loadings showing similarities with the pattern of the observed trend reveals that the change to a generally more negative Southern Oscillation index (SOI) has had an important effect on regional rainfall trends. A significant decrease in many of the rainfall indices at several stations in southern Chile and Argentina can be explained by a canonical pattern reflecting a weakening of the continental trough leading to a southward shift in storm tracks. This latter signal is a change that has been seen at similar latitudes in other parts of the Southern Hemisphere. A similar analysis was carried out for eastern Brazil using gridded indices calculated from 354 stations from the Global Historical Climatology Network (GHCN) database. The observed trend toward wetter conditions in the southwest and drier conditions in the northeast could again be explained by changes in ENSO. © 2006 American Meteorological Society.

Registro:

Documento: Artículo
Título:Trends in total and extreme South American rainfall in 1960-2000 and links with sea surface temperature
Autor:Haylock, M.R.; Peterson, T.C.; Alves, L.M.; Ambrizzi, T.; Anunciação, Y.M.T.; Baez, J.; Barros, V.R.; Berlato, M.A.; Bidegain, M.; Coronel, G.; Corradi, V.; Garcia, V.J.; Grimm, A.M.; Karoly, D.; Marengo, J.A.; Marino, M.B.; Moncunill, D.F.; Nechet, D.; Quintana, J.; Rebello, E.; Rusticucci, M.; Santos, J.L.; Trebejo, I.; Vincent, L.A.
Filiación:Climatic Research Unit, School of Environmental Sciences, University of East Anglia, Norwich NR4 7TJ, United Kingdom
National Climatic Data Center, Asheville, NC, United States
Centro de Previsão de Tempo e Estudos Climáticos, Instituto Nacional de Pesquisas Espaciais, Cachoeira Paulista, Brazil
Universidade de São Paulo, São Paulo, Brazil
Instituto Nacional de Meteorologia, Brasilia, Brazil
Dirección Nacional de Meteorología e Hidrología, DINAC, Luquq, Paraguay
Departamento de Ciencias de la Atmósfera y los Océanos, FCEN, Universidad de Buenos Aires, Buenos Aires, Argentina
Universidade Federal do Rio Grande do Sul, Port Alegre, Brazil
Faculty of Science, Universidad de la Republica, Montevideo, Uruguay
Universidad Nacional de Asunción, San Lorenzo, Paraguay
Dirección Nacional de Meteorología, Montevideo, Uruguay
Universidad Nacional Agraria La Molina, La Molina, Peru
Federal University of Parana, Curitiba, Brazil
University of Oklahoma, Norman, OK, United States
Banco Nacional De Datos, Servicio Meteorológico Nacional, Buenos Aires, Argentina
Fundação Cearense de Meteorologia e Recursos Hídricos (FUNCEME), Fortaleza, Brazil
Universidade Federal do Para, Belem, Brazil
Dirección Meteorológica de Chile, Santiago, Chile
Faculty of Marine Sciences, Escuela Superior Politécnica del Litoral, Guayaquil, Ecuador
Servicio Nacional de Meteorología e Hidrología, Lima, Peru
Meteorological Service of Canada, Downsview, Ont., Canada
Palabras clave:Atmospheric temperature; Earth atmosphere; Rain; Statistical methods; Weather forecasting; Rainfall index; Sea surface temperature; Southern oscillation index; Climatology; correlation; El Nino-Southern Oscillation; precipitation intensity; sea surface temperature; Argentina; Brazil; Chile; Ecuador; Paraguay; Peru; South America; Uruguay
Año:2006
Volumen:19
Número:8
Página de inicio:1490
Página de fin:1512
DOI: http://dx.doi.org/10.1175/JCLI3695.1
Título revista:Journal of Climate
Título revista abreviado:J. Clim.
ISSN:08948755
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_08948755_v19_n8_p1490_Haylock

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Citas:

---------- APA ----------
Haylock, M.R., Peterson, T.C., Alves, L.M., Ambrizzi, T., Anunciação, Y.M.T., Baez, J., Barros, V.R.,..., Vincent, L.A. (2006) . Trends in total and extreme South American rainfall in 1960-2000 and links with sea surface temperature. Journal of Climate, 19(8), 1490-1512.
http://dx.doi.org/10.1175/JCLI3695.1
---------- CHICAGO ----------
Haylock, M.R., Peterson, T.C., Alves, L.M., Ambrizzi, T., Anunciação, Y.M.T., Baez, J., et al. "Trends in total and extreme South American rainfall in 1960-2000 and links with sea surface temperature" . Journal of Climate 19, no. 8 (2006) : 1490-1512.
http://dx.doi.org/10.1175/JCLI3695.1
---------- MLA ----------
Haylock, M.R., Peterson, T.C., Alves, L.M., Ambrizzi, T., Anunciação, Y.M.T., Baez, J., et al. "Trends in total and extreme South American rainfall in 1960-2000 and links with sea surface temperature" . Journal of Climate, vol. 19, no. 8, 2006, pp. 1490-1512.
http://dx.doi.org/10.1175/JCLI3695.1
---------- VANCOUVER ----------
Haylock, M.R., Peterson, T.C., Alves, L.M., Ambrizzi, T., Anunciação, Y.M.T., Baez, J., et al. Trends in total and extreme South American rainfall in 1960-2000 and links with sea surface temperature. J. Clim. 2006;19(8):1490-1512.
http://dx.doi.org/10.1175/JCLI3695.1