Phase relation between CAPE and precipitation at diurnal scales over the Indian summer monsoon region

Abstract

The phase relation between convection and precipitation at diurnal scales is essential for convective parameterization in numerical weather prediction models. For the first time in a meteorological study, we quantified the phase relationship between convective available potential energy (CAPE) and precipitation over the Indian summer monsoon region at diurnal scales using space-based precipitation and CAPE observations from 7 years (2006-2012) of GPS-RO measurements. Also, we quantified the phase relationship for the land and oceanic regions separately. On average, the peak in CAPE magnitudes leads precipitation peak by ∼2-4 h over the study region.