Abstract

Abstract The monsoon boundary layer was subjected to aerial measurements by the National Center for Atmospheric Research (NCAR) Electra on 20 and 24 June 1979 as part of the Arabian Sea component of the Summer Monsoon Experiment (MONEX). Gust probe (also called fast response or turbulence) measurements of u (eastward), v (northward), w, T and ρv, (absolute humidity), available from 80 to 550 m are used to compute turbulent fluxes, while slow response (one-second) measurements of u, v, T and Td available from 80 to 20 m, are used to relate thew fluxes to the low-level flow. The turbulence Rights on 20 June were made under an extensive synoptic scale cloud system. Within this cloud system variations in the cloud type and convective activity occurred between the two areas where intensive boundary layer (RL) measurements were made. The southern area, which had lower ρv values, was dominated by multiple cloud layers, downward virtual heat flux, weak upward moisture flux in the BL, and a sharply defined jet str...

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