摘要
太行山年降水量较少,周边人口密集用水量大,存在水资源短缺的问题。全球变暖影响太行山区水资源和生态环境,但现有研究并未涉及太行山脉两侧的降水变化的时空差异。本文基于1961—2018年太行山区109个气象站点的逐日降水数据,采用反距离权重插值法、线性趋势法、Mann-Kendall突变检验和Morlet连续复小波,探究太行山东西侧降水时空变化特征。结果表明:(1)太行山年降水量呈减少趋势,其中西侧于1973年形成年降水量减少突变。东侧的小雨、暴雨、大暴雨及以上级别降水日数和西侧的小雨、中雨和暴雨日数呈减少趋势。(2)太行山年降水量由东南向西北递减。小雨日数的减少东西两侧基本持平,中雨日数的减少主要集中在西侧,暴雨、大暴雨及以上降水日数的减少主要集中在东侧。(3)太行山东西两侧年降水量的第一主周期均为28 a;东侧和西侧小雨、中雨、大雨、暴雨和大暴雨及以上级别降水日数的第一主周期分别为22 a、21 a、22 a、28 a、28 a和22 a、22 a、28 a、28 a、6 a。研究结果可为太行山区防灾减灾和气候变化应对提供参考。
Inadequate annual precipitation,dense population and huge water demand lead to shortage of water resources in the Taihang mountains area of China,and ecological environment and water resources in the area are highly susceptible to the change in precipitation due to global warming.Most research concerned about the geographical correlation between rainfall and topographical features in the area,but little attention was paid to the differentiation of temporal and spatial variation of precipitation from the eastern Taihang Mountains to the western Taihang Mountains,which is of important to provide scientific evidence for allocation of water resources and warning of disaster events.In this study,based on the daily precipitation data collected by 109 meteorological stations from 1961 to 2018,it studied temporal and spatial characteristics and differences of precipitation on the eastern and western sides of the Taihang Mountains,by the inverse distance weight interpolation method,linear trend method,Mann-Kendall mutation test and Morlet continuous complex wavelet.The results showed that:(1)The annual precipitation of the Taihang Mountains had a tendency of decreasing,and a sudden decrease occurred in 1973 for the western Taihang Mountains.It was decreasing for the days of light rain,rainstorm,heavy storm rain and above precipitation intensity in the eastern side,as well as light rain,moderate rain and rainstorm days in the western side.(2)The annual precipitation of the Taihang Mountains decreased from southeast to northwest.The reduction of light rain days was about the same on the eastern side and western side.The reduction of moderate rain days was mainly concentrated in the western side,and the reduction days of rainstorm,heavy storm rain and above precipitation intensity was mainly concentrated in the eastern side.(3)The first major cycle of annual precipitation on the eastern and western sides of the Taihang Mountains was 28 a.The first major cycles of light rain,moderate rain,heavy rain,rainstorm,heavy storm rain
作者
何雪莉
李亚男
石天宇
周学文
刘德新
HE Xueli;LI Yanan;SHI Tianyu;ZHOU Xuewen;LIU Dexin(College of Geography and Environment,Henan University,Kaifeng 475004,Henan,China;Key Laboratory of Geospatial Technology for Middle and Lower Yellow River Region, Henan University, Kaifeng 475004, Henan, China)
出处
《山地学报》
CSCD
北大核心
2022年第1期43-55,共13页
Mountain Research
基金
国家自然科学基金(41907382)
中国博士后科学基金(2019M652520)。
关键词
降水
降水日数
时空差异
太行山
precipitation
precipitation days
temporal and spatial differences
the Taihang Mountains
