Spatial Distribution Characteristics of Interdecadal Variations in Precipitation in Heilongjiang Province
This study focuses on the spatial distribution characteristics of interdecadal variations in precipitation in Heilongjiang Province,based on precipitation observation data from 1961 to 2023 for analysis.The findings are as follows:The average annual precipitation in Heilongjiang Province is 535.2 mm,with significant regional and seasonal differences.The western part of the Songnen Plain has less precipitation,while the western foot of the Zhangguangcai Mountain Range and the southern foot of the Lesser Khingan Range have more precipitation;summer is the period with more precipitation,especially in the central and northern areas where the precipitation is the highest,followed by autumn,and winter has the least precipitation;in the wet period,the autumn precipi-tation is significantly higher than usual,while in the dry period,the summer and autumn precipitation is signifi-cantly lower than usual in the first wet period,precipitation is mainly more in summer and autumn,while in the second wet period,precipitation in all seasons is higher,with a greater departure percentage in winter and au-tumn;in the first dry period,winter precipitation is relatively the least,in the second dry period,both winter and spring precipitation are more,and autumn is significantly less;although the annual precipitation in the two dry periods is similar,the winter precipitation in the second dry period is closer to the level of the wet period,show-ing the variability of precipitation between different dry periods.These findings not only deepen the understand-ing of interdecadal variations in precipitation in Northeast China but also provide a scientific basis for responding to climate change.
Heilongjiang ProvincePrecipitationInterdecadal variationsSpatial distribution
NETL
NSTL
万方数据
