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Observed Trends in Indices of Daily Temperature Extremes in South America 1960–2000

Lucie A. VincentT. C. PetersonNOAA/National Climatic Data Center, Asheville, North CarolinaVicente BarrosDepartamento de Ciencias de la Atmósfera y los Oceanos, FCEN, Universidad de Buenos Aires, Buenos Aires, ArgentinaMónica MarinoBanco Nacional de Datos, Servicio Meteorológico Nacional, Buenos Aires, ArgentinaMatilde RusticucciDepartamento de Ciencias de la Atmósfera y los Oceanos, FCEN, Universidad de Buenos Aires, Buenos Aires, ArgentinaGonzalo CarrascoEdson RamírezInstituto de Hidráulica e Hidrológica UMSA, San Andres, BoliviaLincoln Muniz AlvesCentro de Previsão de Tempo e Estudos Climáticos, Instituto Nacional de Pesquisas Espaciais, Cachoeira Paulista, BrazilTércio AmbrizziUniversidade de Sao Paulo, Sao Paulo, BrazilMoacir Antônio BerlatoUniversidade Federal do Rio Grande do Sul, Port Alegre, BrazilAlice M. GrimmUniversidade Federal do Paraná, Curitiba, Paraná, BrazilJosé A. MarengoCentro de Previsão de Tempo e Estudos Climáticos, Instituto Nacional de Pesquisas Espaciais, Cachoeira Paulista, BrazilLuiz Carlos Baldicero MolionUniversidade Federal de Alagoas, Maceió, Alagoas, BrazilDavid Ferran MoncunillFundação Cearense de Meteorologia e Recursos Hídricos (FUNCEME), Fortaleza, Ceara, BrazilExpedito Ronald Gomes RebelloYumiko Marina Tanaka da AnunciaçãoJuan QuintanaDirección Meteorológica de Chile, Santiago, ChileJosé SantosFaculty of Marine Sciences, Escuela Superior Politécnica del Litoral (ESPOL), Quito, EcuadorJulián BaézGenaro CoronelUniversidad Nacional de Asunción, San Lorenzo, ParaguayJ. A. GarcíaUniversidad Nacional Agraria La Molina, La Molina, Lima, PeruI. TrebejoServicio Nacional de Meteorología e Hidrología, Lima, PeruMario Pérez BidegainFacultad de Ciencias, Universidad de la Republica, Montevideo, UruguayM. R. HaylockClimatic Research Unit, University of East Anglia, East Anglia, United KingdomDavid J. KarolyUniversity of Oklahoma, Norman, Oklahoma

2005en

ABI

Annotatsiya

Abstract A workshop on enhancing climate change indices in South America was held in Maceió, Brazil, in August 2004. Scientists from eight southern countries brought daily climatological data from their region for a meticulous assessment of data quality and homogeneity, and for the preparation of climate change indices that can be used for analyses of changes in climate extremes. This study presents an examination of the trends over 1960–2000 in the indices of daily temperature extremes. The results indicate no consistent changes in the indices based on daily maximum temperature while significant trends were found in the indices based on daily minimum temperature. Significant increasing trends in the percentage of warm nights and decreasing trends in the percentage of cold nights were observed at many stations. It seems that this warming is mostly due to more warm nights and fewer cold nights during the summer (December–February) and fall (March–May). The stations with significant trends appear to be located closer to the west and east coasts of South America.

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Identifikatorlar

DOI: 10.1175/jcli3589.1

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