太阳辐射对青藏高原东部地区气温日较差的影响  

Influence of Solar Radiation on Daily Temperature Range in the Eastern Tibetan Plateau

作　　者：胡启军[1] 李泊霖 曹帮军 何乐平[1] 周振翔 HU Qijun;LI Bolin;CAO Bangjun;HE Leping;ZHOU Zhenxiang(School of Civil Engineering and Architecture,Southwest Petroleum University,Chengdu 610500,China;Plateau Atmosphere and Environment Key Laboratory of Sichuan Province,School of Atmospheric Sciences,Chengdu University of Information Technology,Chengdu 610225,China)

机构地区：[1]西南石油大学土木工程与测绘学院,四川成都610500 [2]成都信息工程大学大气科学学院高原大气与环境四川省重点实验室,四川成都610225

出　　处：《高原科学研究》2021年第1期8-17,共10页Plateau Science Research

摘　　要：文章对青藏高原东部地区1985—2015年的太阳辐射(Rs)和气温日较差(DTR)进行了年际趋势比较,分析了Rs对研究区域DTR影响的具体机理以及纬度、海拔、冷暖季节和土地利用类型等因素的影响。结果显示:(1)海拔高度与DTR月平均异常值与Rs月平均异常值相关系数成正比关系;(2)暖季时期RS-DTR相关性优于冷季时期;(3)纬度与RS-DTR相关系数成反比关系;(4)四种土地利用类型下DTR与Rs相关系数大小为林地>耕地>草地>山地,其中,冷暖季节是RS-DTR相关性的主要控制因素。表明31年来青藏高原东部地区的RS-DTR总体从20世纪80年代到21世纪10年代呈现下降趋势,Rs的演变模式与DTR的演变模式在年、月的时间尺度上是基本一致的,并揭示了Rs在不同环境因素影响下对DTR作用效果的变化模式。In this paper,we compare the annual trends of solar radiation(Rs)and daily temperature range(DTR)in the eastern part of the Tibetan Plateau from year 1985 to 2015 and the specific mechanism of the effects of RS on the DTR in the studied region was analyzed,as well as the effects of latitude,altitude,warm and cold seasons and land use types on DTR.The results showed that:(1)the altitude is positively correlated with the correlation coefficients of the monthly average abnormal value of DTR and Rs.(2)The correlation between Rs and DTR in the warm season was better than that in cold season.(3)The latitude is negatively correlated with Rs-DTR corre⁃lation coefficients.(4)The level of correlation coefficients of DTR and Rs under the four land use types can be ranged from high to low,such as woodland>cultivated land>grassland>mountain areas.The warm and cold seasons were the main controlling factors of Rs-DTR correlation.This indicated that the Rs-DTR in the eastern part of the Tibetan Plateau has been decreasing from 1980s to 2010s and the variability mode of Rs and DTR were basically the same on the time scale of year and month,and reveals the variation model of the effect of Rs on DTR under the influence of different environmental factors.

关 键 词：太阳辐射 气温日较差 年际变化 青藏高原 

分 类 号：P423[天文地球—大气科学及气象学]