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Radiative Feedbacks on Convective Organization and Tropical Cyclone Development (Invited Presentation)

Presentation Date
Wednesday, January 11, 2023 at 10:45am - Wednesday, January 11, 2023 at 11:15am
Colorado Convention Center - 207



The impact of radiative feedbacks on convective organization and tropical cyclone (TC) development is reviewed and new insights are presented from a hierarchy of model simulations and observations. Model simulations indicate that the spatial gradient in radiative heating between areas of convection and large-scale environment induces a secondary circulation that generates an upgradient transport of moist static energy towards the convective center. A coordinate set of feedback suppression experiments under both realistic and idealized settings demonstrate the critical role of radiative heating on TC development, particularly at the earliest stages of formation. When radiative feedbacks are suppressed, TC frequency is reduced primarily due to a decrease in the number of pre-TC synoptic disturbances. Satellite analyses provide further observational support of this mechanism, with the spatial gradient in radiative heating providing an important indicator of subsequent TC intensification.

Funding Program Area(s)