Precipitation and sea-surface salinity in the tropical Pacific Ocean

摘要: Monthly sea-surface salinity (SSS) and precipitation (P) in the tropical Pacific region are examined for 1974–1989 period. The SSS data derived mainly from water sample measurements obtained a ship-of-opportunity program, rainfall satellite observations of outgoing longwave radiation. mean standard deviation patterns P exhibit good correspondence heavy-rainfall regions characterising Intertropical Convergence Zone (ITCZ), South (SPCZ) part western warm pool. An Empirical Orthogonal Function (EOF) analysis indicates two dominant modes variation linking changes, one mode at seasonal timescale both convergence zones, other ENSO central-western equatorial (165°E–160°W) SPCZ. inferences EOF used simple linear regression model order to try specify changes known changes. A comparison between hindcast observed suggests that, timescales, could be infer timing, but not magnitude, SPCZ area. effects evaporation, salt advection mixed-layer depth on results discussed.