Precipitable Water and rainfall variabilites over the Amazon Basin region using the GPS Radio Occultation data, Tropical Rainfall Measuring Mission data and station data

96.P. LLAMEDO, R. HIERRO, A. DE LA TORRE AND P. ALEXANDER

Foz de Iguazu

Simposio; 2nd COSPAR SIMPOSIUM; 2015

The Amazon basin (AB) region (0-20S and 75W-45W), constitutes the largest extent oftropical rainforest on Earth. The annual mean regional precipitation becomes the most important heat source for the tropical atmosphere providing almost 15 % of the global water discharged to the oceans.The precipitable water content (PW) and specific humidity (q) obtained by the Global Positioning System (GPS) Radio Occultation (RO) technique (2006-2014), daily accumulated rainfall data (3B42 v7 product) obtained by the Tropical Rainfall Measuring Mission (TRMM) (1998-2013) and daily rainfall station data (Brazilian water agency) were used to study the variabilities in climate signal over the AB.A multivariate linear regression is applied to time series to study the deppendace of longer signals like ENSO and possible trends. The correlations between PW and rainfall is analized. Also, a continuous wavelet transform is applied to PW and rainfall to investigate the temporal and spatial modes of oscullation.