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Characteristics of Radiation Balance on the Alpine Wetland in Haibei Prefecture of the Qilian Mountains in Growing Season

LI Ying-nian~1, ZHAO Liang~1, ZHANG Fa-wei~1,2, XU Shi-xiao~1, ZHAO Xin-quan~1(1.Northwest Institute of Plateau Biology,Chinese Academy of Sciences,Xining Qinghai 810008,China;2.Graduate University of the Chinese Academy of Sciences,Beijing 100049,China)  
In this paper,radiation balance and changing characteristics on alpine wetland in Haibei Prefecture of the Qilian Mountains were analyzed according to long-term observation data in growing season.The results showed that there were higher total global solar radiation(DR),lower surface reflected radiation(UR) and lower surface effective radiation for the alpine wetland,as well as higher long-wave radiation(DLR),atmospheric inversion radiation(ULR) and net radiation(R_n).Their diurnal and seasonal variations were pronounced.As regards the diurnal variation during growing season(from May to September),the order was DRR_nURULRDLRELR,however,as regards the total quantity,the order was ULRDLR DRR_nURELR,with the values of 4650.6,4225.5,3058.8,2156.2,477.62 and 425.1 MJ·m~-2,respectively.In light of monthly variations,the month maxima of ULR,DLR and DR were in July(950.1 MJ·m~-2);those of R_n,UR and ELR were in June,May and August.The values of ULR,DLR,DR,R_n,UR and ELR were 980.3,913.1,721.5,554.9,112.1 and 127.4 MJ·m~-2,respectively.
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