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Coherent intraseasonal oscillations of ocean and atmosphere during the Asian Summer Monsoon
Author(s) -
Sengupta Debasis,
Goswami B. N.,
Senan Retish
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 - 10.1029/2001gl013587
Subject(s) - outgoing longwave radiation , climatology , monsoon , sea surface temperature , atmosphere (unit) , convection , satellite , east asian monsoon , atmospheric sciences , environmental science , flux (metallurgy) , atmospheric convection , ocean heat content , geology , meteorology , geography , troposphere , physics , materials science , astronomy , metallurgy
The space‐time evolution of the ocean and atmosphere associated with 1998–2000 monsoon intraseasonal oscillations (ISO) in the Indian Ocean and west Pacific is studied using validated sea surface temperature (SST) and surface wind speed from the Tropical Rainfall Measuring Mission (TRMM) Microwave Imager, and satellite outgoing longwave radiation. Monsoon ISO consist of alternating episodes of active and suppressed atmospheric convection moving northward in the eastern Indian Ocean and the South China Sea. Negative/positive SST anomalies generated by fluctuations of net heat flux at the ocean surface move northward following regions of active/suppressed convection. Such coherent evolution of SST, surface heat flux and convection suggests that air‐sea interaction might be important in monsoon ISO.