1990~2023年黑龙江省降水时空变化特征

Spatial-Temporal Variation Characteristics of Precipitation in Heilongjiang Province from 1990 to 2023

摘要: 本文基于CRU降水数据，采用线性趋势法、Mann-Kendall突变检验法，分析了1990~2023年黑龙江省年际以及四季降水时空变化特征。结果表明：1990~2023年，黑龙江省地区除春季外，年际、夏、秋、冬降水量均呈不显著增加趋势。从空间上看，黑龙江省年降水呈中部多、东西少的空间分布格局，其中降水集中区主要分布在伊春–绥化–哈尔滨一带。黑龙江省夏季大部分地区平均雨量超过1000 mm；冬季大部分地区平均雨量在73 mm左右；秋季降水与年平均降水的空间分布较为一致，降水量由中部向东西两侧不断递减。

Abstract: Based on CRU precipitation data, this paper analyzes the spatio-temporal changes of inter-annual and four-season precipitation in Heilongjiang Province from 1990 to 2023 by using linear trend method and Mann-Kendall mutation test method. The results showed that the interannual, summer, autumn and winter precipitation showed no significant increase trend during 1990~2023, except spring. From the spatial perspective, the annual precipitation in Heilongjiang Province is more in the middle and less in the east and the west, and the precipitation concentration area is mainly distributed in the Yichun-Suihua-Harbin area. The average rainfall in most areas of Heilongjiang Province in summer is more than 1000 mm. The average rainfall in most areas in winter is about 73 mm; The spatial distribution of autumn precipitation is consistent with the annual average precipitation, and the precipitation decreases from the middle to the east and west sides.