Relations between ENSO and the South Atlantic SST modes and their effects on the South American rainfall
作者： Mary T Kayano , Rita V Andreoli , Rodrigo A Ferreira de Souza , None
DOI: 10.1002/JOC.3569
关键词:
摘要: This paper analyses the relations between El Nino/Southern Oscillation (ENSO) mode in tropical Pacific and sea surface temperature (SST) modes South Atlantic for 1900–2006 period. In Atlantic, two are analysed more detail: dipole (SAD) mode, with centres at (15°S, Greenwich longitude) (37.5°S, 25°W) southwestern (SWSA) (30°S, 40°W) southern midlatitudes. The ENSO SAD lagged or lead connected depending on period of analysis. An Nino (a La Nina) precedes by up to 6 months establishment a positive (negative) during 1920–1930 1940–1980 periods. Otherwise, 1 year Nina (El Nino) 1975–2000 On other hand, SWSA is strongly driven ENSO. effects both American rainfall also discussed seasonal basis. general, has weak influence ENSO-related (SAD-related) anomalies over America. have combined effect southeastern regions A particularly important result present analysis climate monitoring forecasting purposes seems be changing modes. Copyright © 2012 Royal Meteorological Society
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