Seminar by Dr. Thomas Kilpatrick

Scripps Institution of Oceanography

Satellite observations of convection–wind coupling

Satellite scatterometers measure surface winds over the global oceans, but these observations have historically been limited by rain-related errors. We have recently developed techniques to circumvent these rain-related errors, allowing for direct observational study of convection–wind coupling over the ocean. We use these corrected wind data to detect cool downdrafts from mesoscale convective systems (MCSs) for the first time. These wind observations are validated against surface buoys and satellite observations of cloud-top temperature. Building on this study, we utilize satellite wind and rainfall observations to examine coupling
between the land–sea breeze and the diurnal cycle of rainfall in the Bay of Bengal. Observations show co-propagation of surface convergence and rainfall anomalies from the eastern coast of India into the bay; surface convergence leads the rainfall anomalies by 1–2 hours, implying that the land breeze forces the diurnal cycle of convection over the bay.

Jasmine - Seminar Room (1010), 10th floor, M Building