Analysis on Temporal and Spatial Variation Charac- teristics of the Precipitation in Hexi Corridor in Re- cent 58 Years

• 作者: LI Xiang-yu ZHOU Xiang
• 来源期刊: 气象与环境研究：英文版
• 学科: 地球科学
• 关键词: 时空变化特征 年降水量 河西走廊 地球化学特征 平均降雨量 气候趋势系数 移动平均线 年代际变化
• 年，卷（期）: 2012,（1）
• 页码范围: 36-40
• 页数: 5页
• 分类号: P467

摘要

[Objective] The research aimed to analyze temporal and spatial variation characteristics of the precipitation in Hexi Corridor in the past 58 years.[Method] Based on monthly rainfall data in Hexi Corridor from 1951 to 2008,by using moving average,wavelet analysis and climate trend coefficient,variation rule of the precipitation in Hexi Corridor in the past 58 years was analyzed.[Result] Average rainfall in Hexi Corridor in the past 58 years was 130.4 mm.Precipitation mainly concentrated in summer,occupying 59.08% of the annual rainfall.From June to September,it occupied 72.57% of the annual precipitation.Interdecadal change of the precipitation in Hexi Corridor wasn't severe.Average rainfall in each decade was from 120.8 to 139.0 mm.The precipitation series had periods of the 5,10,21 and 32 years in Hexi Corridor from 1951 to 2008.In the future,annual,spring,summer and winter precipitation would have small increase tendency.Increase amplitude of the annual precipitation in Shule River basin was the biggest(5.231-0.062 mm/10 a).The increase amplitude in the south and southeast of the Heihe River basin was bigger than that in the northwest.The smallest increase amplitude of the annual precipitation was 3.280-0.098 mm/10 a in Shiyang River basin.[Conclusion] This research could provide beneficial reference for coordinated development between local social economy and ecological environment.