Abstract
AbstractUsing the hourly rain gauge data of 285 stations from 1961–2006, the diurnal variations of rainfall with different duration time over the eastern China were studied. The short‐duration rainfall over the whole eastern China peaks around 17 Beijing Time (BJT), but the peak time of long‐duration rainfall exhibits significant regional differences. Long‐duration rainfall over the northern (southern) parts of the Huai River presents the peaks during 02–06 (06–10) BJT. The regional differences exist in rainfall amount, frequency and intensity, but they are more obvious in the rainfall intensity and heavy long‐duration rainfall. Further analysis shows that the differences in rainfall peaks are contributed by the mean start time and the time between the start and peak of rainfall events jointly. Besides, the possible reasons, accounting for the different diurnal peaks of long‐duration rainfall over the southern and northern parts of the Huai River, have also been discussed.
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