Applications of TOVS data in mesoscale analysis

Analyses a mesoscale process of the HuangHuai cloud cluster over China from July 13 to 15, 1989 by using TOVS data of NOAA-11 and adopting the recursive filter analysis system. Some results are obtained as follows: the 500 hPa analytical geopotential fields are very similar to the real-time synoptic situations on large-scale weather systems and some mesoscale systems; cloud clusters develop in the 850 hPa saturated areas or move to these areas; precipitation occurred in moist areas but did not coincide with the moist center; a large scale weather background is necessary for the occurrence of strong rain; mesoscale cloud clusters form at the warmer side of strong MSU/CH2 brightness temperature gradient areas, but do not always develop there