达索普浅孔冰心中记录的现代环境过程  

MODERN ENVIRONMENT PROCESSES RECORDED IN DASUOPU SHALLOW ICE CORE

作　　者：段克勤[1] 姚檀栋[1] 蒲健辰[1] 杨志红[1] 皇翠兰[1] 

机构地区：[1]中国科学院兰州冰川冻土研究所

出　　处：《海洋地质与第四纪地质》1998年第1期65-70,共6页Marine Geology & Quaternary Geology

摘　　要：通过对达索普浅孔冰心的离子分析，得出达索普冰川从１９８３年到１９９５年年降水量波动减少，且该冰川没有受到人类活动较大的影响。该冰川上的降水主要由西南季风控制，但阳离子浓度大小顺序却与地壳中顺序一致，显示了达索普冰川的特殊性。同时，该冰川所记录的ＮＯ－３和ＳＯ２－４的多年平均浓度可做为青藏高原南部对流层中上部ＮＯ－３和ＳＯ２－４的浓度的本底值。且该冰川中记录的高浓度的ＮＯ－３与其高海拔是分不开的。オuring JuneAugust,1996,a SinoAmerican expedition team successfully recovered an ice core(20m) from the Dasuopu Glacier(7 000m above sea level)in the Himalayas.The Dasuopu Glacier is suitable for ice core drill.From this shllow ice core,we know that precipitation of this glacier was decreasing from 1983 to 1995,and from analysis of ions,make clear that this glacier has not suffered human activities,and therefore NO-3 and SO2-4 recorded in this ice core can be used as the background value of NO-3 and SO2-4 in the middleupper troposphere over the south of QinghaiTibetan Plateau.We also find that the high value of NO-3 is connected with the glaciers high altitude.

关 键 词：气候变化 降水 硝酸根 硫酸根 冰芯 环境过程 

分 类 号：P467[天文地球—大气科学及气象学]