Comment on “Interaction of Low-Level Flow with the Western Ghat Mountains and Offshore Convection in the Summer Monsoon”

Abstract

- test of hypothesis that deep convection in monsoon region is triggeredpartially by upstream lifting associated with blocking by the {G}hatmtns - aircraft data from 1979 {S}ummer {M}onsoon experiment: 1 daycase study - momentum budget shows advection and flux divergenceto dominate - lifting was calculated with nonlinear 2-{D} model (->{JFM}95.241) applied to the layer below the critical level only (ohoh!)- the computed upstream lifting of 100 m was sufficient to triggerconvection (reach the {LFC}) as computed from far-upstream soundings;days without convection would have required a 500 m lift to the {LFC}- determination wether a prescribed lifting would suffice to initiateconvectionl with saturation point method ({B}etts) assuming 20% entrainmentp667