科研之友
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摘要
Spatial variability of rainfall was studied through a gauge network on the Delmarva Peninsula. The gauge network consists of 11 dual- or triple-tipping-bucket sites ranging from 1- to 150-km separation distances. The time of the tip (0.254 mm) was recorded to a datalogger, and a continuous dataset was available from all sites for over 5 yr (May 2005-July 2010). A three-parameter exponential function was fitted to the paired correlations and the resultant correlation distance was 8-13 km during summer and 51-85 km during winter. The correlation distances showed pronounced year-to-year variability as being 8-43 km and 13-67 km during spring and autumn, respectively. The airmass convection was the main weather system during summer while nor%26apos;easters played an important role during winter. The 30-min integration and two-tip rain/no-rain threshold was selected for the base of this study. The correlation distance increased with longer integration periods and was 17 and 32 km for 30 min and 1 h, respectively.
- 出版日期2014-4
