南水北调与水利科技2016，Vol.14Issue(6)：33-38,49,7.DOI:10.13476/j.cnki.nsbdqk.2016.06.006
60年来渭河关中地区气温与降水变化及其原因
Variation and reason analysis of temperature and precipitation of Weihe River in Guanzhong area in the last 60 years
摘要
Abstract
The identification of changes and reasons for hydrological factors has practical significance for resource utilization and the ecological health of river basin .Based on the data from 1951-2013 of Weihe River in Guanzhong area ,the trend and muta‐tion of temperature and precipitation were analyzed with linear regression ,Mann‐Kendall test ,concentration degree and concen‐tration time .The change reasons of temperature and precipitation were elaborated .The results were as follows :(1) The annual average temperature showed a significant increasing trend ,with 0 .206 ℃ /(10a) ,and winter contributed most .Obvious muta‐tions occurred in the mid‐1990s for the annual and seasonal mean temperature .(2) The annual precipitation showed an insignifi‐cant decrease of about 0 .5775 mm per year .Spring and autumn contributed greatly to the downward trend .The mutations were complicated ,with varying degrees in each era .The distribution of precipitation was stable ,with concentration degree and concen‐tration time remaining at 0 .5~0 .6 and in July ,respectively .(3) The changes of temperature and precipitation were mainly the combined results of natural factors and human factors .Natural factors included solar activity ,atmospheric circulation and mon‐soon impact ,and the human factors were mainly greenhouse gas emissions and land cover changes .关键词
渭河关中地区 ,Mann-Kendall检验/趋势分析/年内分配/变化成因Key words
Weihe River in Guanzhong area/Mann-Kendall test method/trend analysis/annual distribution/reason for change分类
地球科学引用本文复制引用
董晴晴,王会肖..60年来渭河关中地区气温与降水变化及其原因[J].南水北调与水利科技,2016,14(6):33-38,49,7.基金项目
国家自然科学基金项目（41371043） FundNational Natural Science Foundation of China （）
