インドシナ半島を対象とした全球気候モデルによる地表面パラメータ変化が降水に与える影響に関する数値実験

単純化した森林伐採が降水に与える影響

抄録

Simplified deforestation effects on the climate over Indochina is assessed usinga GCM. In the simulation, a significant decrease in rainfall over Indochina is found in April and May (the beginning of the wet season) as a result of the simplified deforestation. On the contrary, no significant decrease is found in the time series of observed rainfall data in April and May. As the strong sensible heat calculated at forested land surface in Indochina in the dry season is supposedto be inadequate, additional two sets of numerical experiments are carried out with simple modifications to the land surface scheme. However, the decrease in rainfall is still found in the results of the numerical experiments. Change in Bowen ratio doesn't seem to play a major role within “land surface-rainfalrlelationship.”