近47年环青海湖地区气候变化特征分析  

Analysis on the Characteristics of Climate Change in the Surrounding Area of Qinghai Lake in Recent 47 Years

作　　者：何永晴[1] 李凤霞[2] 

机构地区：[1]安徽农业大学,安徽合肥230036 [2]青海省气象科学研究所,青海西宁810001

出　　处：《安徽农业科学》2011年第16期9902-9904,共3页Journal of Anhui Agricultural Sciences

基　　金：国家科技支撑计划项目(2007BAC30B02);青海省科技攻关项目(2008-N-146)

摘　　要：[目的]研究近47年环青海湖地区气候变化特征。[方法]利用1961~2007年环湖地区5个气象观测站的气温、降水和日照等气候要素资料,分析各气象要素的年、季、年代变化。[结果]近47年来,环湖地区气温上升趋势明显,其中年平均气温以≥0.30℃/10 a的倾向率上升,年平均最低气温比年平均最高气温上升显著;年平均降水量呈减少趋势,其气候倾向率为-3.67 mm/10 a,春、秋季降水量的减少趋势明显,而夏、冬季呈增加趋势,但不明显;年日照时数也呈减少趋势,其气候倾向率为-1.79 h/10 a,夏季日照时数的减少趋势最明显,冬季次之,春、秋季节增加不明显。[结论]该研究为环湖地区气象灾害的有效防御提供了理论参考。[Objective] The aim was to study the characteristics of climate change in the surrounding area of Qinghai Lake.[Method] Based on the data of temperature,precipitation and sunshine hours from 5 representative meteorological stations in the surrounding area of Qinghai Lake during 1961-2007,the annual,seasonal and decadal variation of meteorological factors were analyzed.[Result] In recent 47 years,temperature showed obvious increase trend in the surrounding area of Qinghai Lake,and annual average temperature increased with the climatic tendency of ≥0.30 ℃/10 a,while there was more significant increase in annual average minimum temperature than annual average maximum temperature;annual mean precipitation decreased with the climatic of-3.67 mm/10 a,and precipitation in spring and autumn reduced obviously,while precipitation in summer and winter increased slightly;annual sunshine hours also showed decrease trend with the climatic tendency of-1.79 h/10 a,while the decreasing trend of sunshine hours was most obviously in summer,and next came winter,while there was no obvious increase in spring and autumn.[Conclusion] The study could provide theoretical references for the effective prevention of meteorological disasters in the surrounding area of Qinghai Lake

关 键 词：环青海湖地区 气候变化 气温 降水量 日照时数 

分 类 号：P461.5[天文地球—大气科学及气象学]