西北师范大学学报（自然科学版）2024，Vol.60Issue(4)：26-34,9.DOI:10.16783/j.cnki.nwnuz.2024.04.003
1960-2020年淮河流域不同等级降水日数时空变化特征
Spatio-temporal characteristics of precipitation days for different grades in Huaihe River Basin during 1960-2020
摘要
Abstract
Based on the daily precipitation data of 40 meteorological stations in the Huaihe River Basin from 1960 to 2020,the spatial and temporal distribution characteristics of the number of rainfall days and the probability of rainy days at different grades were analyzed by using Mann-Kendall mutation test and Morlet wavelet analysis.The results showed that from 1960 to 2020,the average annual total rainfall days in the Huaihe River Basin was 101.13 d,and the number of light rain days accounted for 75.08％of the total rainfall days,which played an important role in the total rainfall days in the Basin.In the past 61 years,the number of light rain,heavy rain,storm rain and total precipitation days in the Huaihe River Basin has decreased,the number of light rain days played a decisive role in the reduction of the total annual precipitation days.The climate probability of total rainy days in the Huaihe River Basin was 0.088～0.536 in recent 61 years.The probability distribution of rainy days in each grade of precipitation in the year showed two types:gently and unimodal type.The number of rainfall days and the probability of rainy days at all grades in the basin were decreasing from south to north.The number of rainfall days and the probability of rainy days were higher in the southeast and southwest of the basin,and lower along the Yiyuan-Yanzhou-Kaifeng-Zhengzhou in the northern basin.There were long period changes of 28a and 22a,and short period changes of 8a and 4a in precipitation of all grades in the basin.关键词
降水等级/降水日数/雨日概率/时空变化/淮河流域Key words
precipitation grade/precipitation day/probability of rainy day/spatial and temporal variation/Huai River Basin分类
天文与地球科学引用本文复制引用
袁征,张志高,李苏,刘嘉毅,王佳欣,王赟,蔡茂堂..1960-2020年淮河流域不同等级降水日数时空变化特征[J].西北师范大学学报（自然科学版）,2024,60(4):26-34,9.基金项目
国家自然科学基金资助项目(42272112) （42272112）
2022河南省哲学社会科学规划项目(2022BJJ003) （2022BJJ003）
河南省科技攻关项目(232102320024 （）
232102321109) （）
河南省高等学校青年骨干教师项目(2020GGJS188) （2020GGJS188）
河南省高等学校重点科研项目(23A170008) （23A170008）
安阳市科技计划项目(2022C01NY019) （2022C01NY019）
