祁连山老虎沟12号冰川浅冰芯记录的气候环境信息  

Climatic and Environmental Records within a Shallow Ice Core at Laohugou Glacier No.12,Qilian Mountains

作　　者：崔晓庆[1,2] 任贾文[1] 秦翔[1,2] 杜文涛[1,2] 孙维君[1,2] 余光明[1,2] 王泽斌[1] 王晓香[1] 孙维贞[1] 王瑜[1] 

机构地区：[1]中国科学院寒区旱区环境与工程研究所冰冻圈科学国家重点实验室,甘肃兰州730000 [2]祁连山冰川与生态环境综合观测研究站,甘肃兰州730000

出　　处：《冰川冻土》2011年第6期1251-1258,共8页Journal of Glaciology and Geocryology

基　　金：国家重点基础研究发展计划(973计划)项目(2007CB411501);科技部科技基础性专项项目"中国冰川资源及其变化调查"(2006FY1102003);冰冻圈国家重点实验室自主课题(SKLCS-09-04)资助

摘　　要：2006年6月在祁连山西段大雪山的老虎沟12号冰川钻取了一支20.12m的浅冰芯,对冰芯中化学组成成分的浓度变化特征和来源分析进行了研究.结果表明,冰芯中δ18 O和可溶性离子含量变化均显示了明显的周期性变化,δ18 O与祁连山西段温度有很好的正相关关系.通过相关分析和HYS-PLIT后向轨迹分析表明,老虎沟12号冰川冰芯中可溶性离子主要来源于我国西北干旱、半干旱区的陆源矿物粉尘和冰川区周边的盐湖矿物风化物.In June 2006,a shallow ice core,20.12 m in length,was recovered from an elevation of 5 040 m in the northern branch firn basin of the Laohugou Glacier No.12 in the western part of the Qilian Mountains.Concentrations of oxygen isotope（δ18O） and major soluble ions were determined.It is found that the relationship between the value of δ18O and air temperature in the west Qilian Mountains is positively correlated.Correlation analysis and backward trajectory model analysis show that the main soluble ions originate mainly from the arid and semi-arid sand-dust areas in Northwest China.However,besides the input of terrigenous material,part of Na＋,Cl-and SO2——4 also originates from salt particles weathering from the numerous salt lakes around the plateau glacier areas.

关 键 词：Δ18O 老虎沟12号冰川 冰芯 气候 环境 可溶性离子 

分 类 号：P343.6[天文地球—水文科学]