Premium
On the relationship between Indian Ocean sea surface temperature and Asian Summer Monsoon
Author(s) -
Li Tim,
Zhang Yongsheng,
Chang C.P.,
Wang Bin
Publication year - 2001
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/2000gl011847
Subject(s) - climatology , monsoon , sea surface temperature , el niño southern oscillation , environmental science , indian ocean , east asian monsoon , forcing (mathematics) , monsoon of south asia , pacific decadal oscillation , oceanography , atmosphere (unit) , atmospheric sciences , geology , geography , meteorology
Indian Ocean SST has been thought to play a weaker role in Indian summer monsoon rainfall than does the equatorial eastern Pacific SST. In this study we show that on the tropical biennial oscillation (TBO, 2–3 year) time scale the Indian monsoon rainfall has significant positive correlations with the Indian Ocean SST and moisture flux transport in the preceding winter and spring. The effect of this SST influence is quite different from the remote forcing of the Indian monsoon rainfall by the eastern Pacific SST, which is more dominant on the El Nino‐Southern Oscillation (ENSO, 3–7 year) time scale. We conclude that while the eastern Pacific SST and the Eurasian land temperature both may affect the monsoon on the ENSO time scale, they are not important on the TBO time scale. Our results support the tropical and local feedback theories of TBO that this most important component of the monsoon variation is largely influenced by the Indian Ocean SST and interactions within the tropical atmosphere‐ocean system (Chang and Li, Nichols).