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Rakesh Ghosh
Public Documents
1
Dynamical Invigoration of Electrified Storms
Dipjyoti MUDIAR
and 11 more
February 22, 2022
The recent emergence of compelling evidence (Mudiar et al., 2018, 2021a 2021b) regarding a significant impact of cloud electrification on rain microphysical processes raises curiosity on the potential dynamical implications of cloud electrification. In this study, the consequence of cloud electrification has been explored from a perspective of interaction between cloud microphysics and dynamics using observational data and numerical models in a tropical condition. It is shown that the strongly electrified (SE) clouds exhibit a reduced value of rain intercept parameter, N0 relative to the weakly electrified (WE) counterpart facilitated by the in-cloud electric field. This process results in a reduction in rain evaporation rate in the warm phase of the cloud, thereby enhancing the surface rain intensity. From a dynamical perspective, the reduced rain evaporation rate gives positive feedback to storm energetics by reducing latent cooling. The reduced latent cooling delays the downdraft thereby facilitating an invigoration of convection. This electrically induced invigoration is termed ‘Dynamical Invigoration of Electrified Storms’.