In this paper, the spatio-temporal distribution and climate characteristics of short-time heavy rainfall in the east of Northwest China is studied based on every 6h rainfall observation data of 136 meteorological stations in the east of Northwest China from 2001 to 2011 and hourly precipitation data from 2009 to 2011 of 1674 automatic meteorological stations, by using climate statistical analysis, linear trend analysis, normalized analysis, subregional of statistics analysis, precipitation concentration degree (PCD) and precipitation concentration period (PCP) analysis. Results showed that the short-time heavy rainfall days interannual change is unobvious, but the regional short-time heavy rainfall process has increased significantly; the short-time heavy rainfall is mainly happened from early July to late August, and it has obvious diurnal variation; the spatial distribution of the short-time heavy rainfall frequency is accordant with the topography distribution, and high frequency area is located near the windward side of summer half year circulation prevailing southwest airflow; the PCD is more and more concentrated from southeast to northwest, and the PCP gradually postponed from east to west in the space.
Bai Xiaoping
,
Jin Shuanglong
,
Wang Shigong
,
Shang Kezheng
,
Zhao Lu
. Spatio-temporal Characteristics of the Short-time Heavy Rainfall in the East of Northwest China[J]. Journal of Desert Research, 2018
, 38(2)
: 410
-417
.
DOI: 10.7522/j.issn.1000-694X.2017.00006
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