SIMULATED THUNDERSTORMS OVER ST. LOUIS, MO

摘要

The METROpolitan Meteorological Experiment (METROMEX) results indicate St. Louis enhances convective rainfall in and downwind of the city. Possible mechanisms considered since METROMEX include enhanced convergence from the urban heat island (UHI) and barrier effects of the built-up surface. Mi-crophysical alterations to cloud systems may also play a role over cities. The complex interactions within the urban boundary layer (UBL) have prevented a complete understanding of these phenomena and their role in thunderstorm modification. The current study employs a nonhydrostatic three-dimensional cloud-resolving model with sophisticated a land surface model to investigate some of these hypotheses.