摘要
为了解四平市降水量变化特征,利用气象站1992-2019年日降水量序列数据,采取线性趋势法、5年滑动平均法、累计距平法,分析年降雨量、四季降雨量及各月降雨量。通过Mann-Kendall突变检验,分析四平市年降雨量及季节尺度的突变。研究结果表明,四平市近28年的年降水量呈上升趋势,年际降水量波动,Mann-Kendall趋势分析后发现其上升变化未通过95%置信度的检验,年降水量和秋季降水量均发生5次突变;四季降水量均呈不显著上升趋势,但是上升幅度不同,春季降水量共发生3次突变,夏季在1999-2000年发生一次突变,冬季最早在1999-2000年发生突变,之后发生2次突变;四平市各月降水量中8月份降水达到峰值,在时间尺度表现为春冬枯、夏秋丰。
In order to understand the variation characteristics of precipitation in Siping city, the linear trend method, 5-year moving average method and cumulative anomaly method were used to analyze the annual precipitation, seasonal precipitation and monthly precipitation based on the daily precipitation series data of meteorological stations from 1992 to 2019. The abrupt changes of annual precipitation, and seasonal scale in Siping city were analyzed by mann-Kendall mutation test. The results show that the annual precipitation in Siping city has an upward trend in recent 28 years, and the annual trace precipitation fluctuates. After mann-Kendall trend analysis, it is found that the upward change of the annual precipitation and autumn precipitation have five abrupt changes. Precipitation in four seasons showed no significant upward trend, but the increasing amplitude was different. There were three abrupt changes in spring precipitation, one in summer precipitation in 1999-2000, and two abrupt changes in winter precipitation in 1999-2000. Among the monthly precipitation in Siping city, the precipitation reached the peak in August, which was dry in spring and winter and abundant in summer and autumn in time scale.
作者
陈寒冰
陈末
王冠华
刘睿姝
CHEN Han-bing;CHEN Mo;WANG Guan-hua;LIU Rui-shu(School of Hydraulic&Electric Power,Heilongjiang University,Harbin 150080,China;Institute of Groundwater Research in Cold Region,Harbin 150080,China)
出处
《水利科技与经济》
2022年第12期1-7,共7页
Water Conservancy Science and Technology and Economy
基金
黑龙江省普通本科高等学校青年创新人才培养计划(编号:UNPYSCT-2020012)。
