Autumn typhoon's rainstorm always causes invaluable loss to people's life and property, so researching their mechanism is of far reaching importance. Two main features of autumn typhoons are:(1)they are always invaded by cold air. (2)for subtropical high ridge is relatively further north, it is special that the water vapor delivered off the subtropical high.0716 super typhoon Krosa is a typical autumn tropical cyclone. Using NCEP reanalysis data by 1°×1°, general surface station and regional meso-scale auto...