Assimilation of Long-Range Lightning Data over the Pacific
HAWAII UNIV HONOLULU DEPT OF METEOROLOGY
Pagination or Media Count:
A Pacific Lightning Detection Network PacNet was designed and constructed with support from ONR, NASA, and Vaisala. In 2009, Vaisala completed an independent and superior network with Northern Hemisphere coverage, Global Lightning Detection GLD360. The new network benefitted directly from the successes and challenges experienced in developing PacNet. This project aims to support operational utilization of the long-range lightning data stream for 1 nowcasting convective activity, 2 convective rainfall analyses over the Pacific, and 3 to improve marine prediction of cyclogenesis of both tropical and extratropical cyclones through sferics data assimilation in NWP models. The scientific and technical objectives of this project are to collect long-range lightning data over the North Pacific Ocean, refine the relationships between lightning and storm hydrometeor characteristics, and assimilate lightning derived products into operational numerical models. Various assimilation methods will be investigated to find an optimal way to assimilate lightning data operationally into NWP models. A goal of this project is the development of forecast guidance tools that combine graphics derived from lightning data with other data sets to maximize their utility in short term forecasting of tropical cyclogenesis. Lightning data from PacNetLLDN or GLD360 will also be combined with data from TCS field operations to investigate the morphology of lightning outbreaks in developing tropical cyclones over the Northwest Pacific Ocean.