10.1
WWLLN lightning and passive satellite microwave data at 37 to 183 GHz: Deep convection in the global broad tropics and tropical cyclones
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For the broad tropics, we find that: (1) lightning occurrence is related to brightness temperature depressions for ice-scattering in all channels, as expected; and (2) the 183 GHz channels are successfully used to identify deep and shallow convection over land, coast and ocean. But, whereas high probabilities of lightning occurrence are observed for both intense and relatively weak convective systems over land, the lightning occurrence over the ocean is associated mostly with more intense convection. This study has also helped to further quantify lightning and 183 GHz brightness temperatures as indicators for deep convection for future geostationary lightning imagers and the recently launched Global Precipitation Measurement satellite.
We apply these broad tropics results to our investigation of intensity change and evolution of tropical cyclones. Our presentation culminates with case studies of tropical cyclones using WWLLN and satellite radiometer data.