Open AccessHigh‐resolution regional climate simulations of the long‐term decrease in September rainfall over Indochina
Author(s) -
Takahashi Hiroshi G.,
Yoshikane Takao,
Hara Masayuki,
Yasunari Tetsuzo
Publication year - 2008
Publication title -
atmospheric science letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.951
H-Index - 45
ISSN - 1530-261X
DOI - 10.1002/asl.203
Subject(s) - climatology , peninsula , term (time) , environmental science , trough (economics) , tropical cyclone , geography , atmospheric sciences , geology , physics , archaeology , quantum mechanics , economics , macroeconomics
We address the long‐term decrease in September rainfall over the Indochina Peninsula. Distinct long‐term decreases in rainfall along the monsoon trough across the Indochina Peninsula have been observed. We performed long‐term simulations and discuss the effects of long‐term changes in both the local surface conditions and large‐scale circulation. Using a 30‐year simulation for September for the period from 1966 to 1995 with land‐use conditions fixed at present‐day values and neglecting the recorded deforestation, we successfully simulated the observed long‐term decrease in rainfall. We therefore conclude that the weakening tropical‐cyclone activity over the Indochina Peninsula region is probably responsible for the decrease in rainfall. Copyright © 2008 Royal Meteorological Society