ISSN 1000-0526
CN 11-2282/P
CN 11-2282/P
Archive > Volume 46 Issue 2 > 2020,46(2):200-211. DOI:10.7519/j.issn.10000526.2020.02.006 Prev Next
Comparative Analysis of SpatioTemporal Distribution Characteristics of Extreme ShortTime Severe Precipitation in Shandong Based on the Dense Observations from Automatic Weather Stations and National Stations
- Article
- Figures
- Metrics
- Preview PDF
- Reference
- Related
- Cited by
- Materials
Abstract:
Using the denselyobserved hourly precipitation (>1 mm) data of the automatic weather stations (referred to as the all stations) and the national meteorological stations (referred to as the national stations) in Shandong Province from April to October 2008-2017, this paper compares the characteristics of spatiotemporal distribution of extreme shorttime severe precipitation with different resolution data. The results are as follows. The skewed characteristics of hourly precipitation at all stations are more obvious than those of the national stations. For the average state of hourly precipitation, both are representative. However, for the analysis of the extremes of shorttime severe rainfall, the all stations data are more advantageous. It is most reasonable to use the 99.5th percentile of each station as the threshold for extreme shorttime severe precipitation. The spatial distribution characteristics of the 30-45 mm threshold are similar for all stations and national stations. For thresholds above 45 mm, the values and ranges of all stations are both greater than those of the national stations. The extreme shorttime severe precipitation intensity in most parts of the province is concentrated at 40-60 mm·h-1, and the spatial distribution characteristics of all stations and national stations in this interval are similar. Nationalstation data can not reflect the spatial distribution of extreme shorttime severe precipitation with intensity below 40 mm·h-1 and above 60 mm·h-1. The spatial distribution characteristics of extreme shorttime severe precipitation intensity are closely related to geographical location and topographical features. The extreme shorttime precipitation intensity, daily maximum precipitation, summer precipitation and annual precipitation in the southeastern Shandong Province rank first in the province. Although the frequency and intensity of severe precipitation are high in northwestern Shandong, they have no positive correlations with annual precipitation and summer precipitation. The monthly and diurnal variations of the extreme shorttime severe precipitation frequency of all stations are consistent with those of the national stations. However, the nationalstation data can not fully represent the monthly and diurnal variations of the extreme shorttime severe precipitation intensity in the province. The data of all stations can more accurately reflect the time variation features of precipitation in the province.
Keywords:
Project Supported:
Clc Number:
P468
Mobile website
