The role of surface air temperature over the east Asia on the early and late Indian Summer Monsoon Onset over Kerala.

ABSTRACT: This study investigates the physical mechanism for late Indian Summer Monsoon onset over Kerala (MOK). 14 early and 9 late onset years are selected based on the criteria when the onset is 5 days or more prior and after normal onset date (i.e 1^st June according to India Meteorological Department) respectively. Then, we perform composite analyses of mean May monthly and daily evolution during early and late onset years to examine the differences in monsoon circulation features prior to the MOK. We find that advection of Surface Air Temperature (SAT) from the northern to the southern China and the eastern Tibetan Plateau (TP) plays an important role to modulate the MOK processes. In the late onset years, more low-level jet (LLJ) from the Bay of Bengal (BOB) divert towards the east

SUBMITTER: Choudhury D 

PROVIDER: S-EPMC6692365 | biostudies-literature | 2019 Aug

REPOSITORIES: biostudies-literature