IC02-18 ORAL

CORRELATION ANALYSIS BETWEEN OCEANIC AND METEOROLOGICAL PARAMETERS ON PERUVIAN NORTH COAST

R. RODRIGUEZ (Universidad de Piura, Apartado 353, Piura, Peru, rrodrigu@udep.edu.pe)

The northern coast of Peru lies approximately between 3.5 and 7 degrees of south latitude. This is the westernmost coast of South-America and very sensitivity to the "El Niño Southern Oscillation" (ENSO) phenomenon. Since that an ENSO is a coupled phenomenon arising from interactions between the atmosphere and the ocean, the warming of Tropical Pacific water has strong influence on the atmosphere of this region. A correlation analysis between oceanic parameters of tropical pacific ocean and some meteorological ones of Peruvian north coast was done. The oceanic parameters that we took for this analysis are the monthly mean of Sea Surface Temperature (SST) of Niño regions on the Equatorial Pacific for 1950-2000 period and the Southern Oscillation index (SOI) for 1882-2000 period. The meteorological parameters for the Peruvian coast are the monthly mean of rain and river streamflows of Piura area (05oS, 80oW). The correlation indexes ranging from 0.5 to 0.9. We also have estimated the lags of time between them. The oceanic parameters are present in advance so they can be used as predictors of meteorological ones during an ENSO event. An experimental reconstructions of SOI and Nino3 region SST anomaly for annual summers (December-January-February) has been done of tree-ring analysis of species from North America. The SOI was reconstructed from 1400 to 1980 and the Niño3 SST anomaly from 1700 to 1980. Since the high correlation indexes that we found, it is possible to intent a climate reconstruction of this region for these periods.