Influence of soil moisture initial conditions on South American

SÖRENSSON A.A., C.G. MENÉNDEZ, P. SAMUELSSON, U. HANSSON, U. WILLÉN, M. RUMMUKAINEN

CLARIS News

CLARIS Project

Lugar: Buenos Aires; Año: 2006 p. 30 - 34

1669-3264

The South American Monsoon System (SAMS, Nogués-Paegle et al., 2002) dominates the mean seasonal cycle of precipitation in tropical and subtropical latitudes. The timing of its onset and duration and the frequency and intensity of daily rainfall have important implications for many climate studies and water resources management applications. The soil moisture memory could influence the development of the SAMS and potentially contributes to atmospheric variability and seasonal predictability. The purpose of this ongoing study is to analyze the sensitivity of the monsoon precipitation to late (austral) winter soil moisture initial conditions on the daily and intraseasonal timescales simulated by the Rossby Centre regional atmospheric climate model RCA3 (Kjellström et al., 2005; see also h�p://www.smhi.se/sgn0106/if/rc/rca.htm).