近期乌鲁木齐河源1号冰川成冰带及雪层剖面特征研究  

Study of the Ice Formation Zones and Stratigraphy Profiles of Snow Pits on the Glacier No.1 at the Headwaters of rümqi River

作　　者：李向应[1] 李忠勤[1] 尤晓妮[1] 王飞腾[1] 李传金[1] 朱宇曼[1] 

机构地区：[1]中国科学院寒区旱区环境与工程研究所天山冰川观测试验站冰芯与寒区环境重点实验室,甘肃兰州730000

出　　处：《冰川冻土》2006年第1期37-44,共8页Journal of Glaciology and Geocryology

基　　金：中国科学院寒区旱区环境与工程研究所引进国外杰出人才基金项目(CACX2003101);国家自然科学基金项目(4037102840571033J0130084401211014030100990102005)资助

摘　　要：天山乌鲁木齐河源1号冰川的成冰带20世纪60年代初,自下而上划分为4个成冰带;1988年,由于气候变暖,冰川上部的冷渗浸重结晶带消失,被渗浸带所取代.对近期1号冰川的成冰带进行了划分,并通过大量雪坑资料,研究论述了目前1号冰川雪层剖面的层位特征.研究发现,由于气候变暖,剖面特征和成冰带谱有由“冷”向“暖”的转化趋势.同时还发现,1号冰川东支顶部发生了强烈的消融现象,该处已由渗浸带转化为具有强烈消融特征的局部消融区.Characteristics of ice formation zones on a glacier and stratigraphy profiles of snow pits that relate the basic features of a glacier are the basic objects of glaciology. The study of ice formation zones on the Glacier No. 1 at the headwaters of （Urümqi River in the Tianshan Mountains began at the beginning of the 1960s, when Xie Zichu and Huang Maohuan and others divided the glacier into four ice formation zones. In 1988, Wang Xiaojun and others found that cold-percolation-recrystallization zone on the glacier disappeared and was replaced by percolation zone. Therefore, in1989, Liu Chaohai and others divided the glacier into three ice formation zones. The glacier has changed a lot since the 1990s, because of temperature increase, resulting in shift of ice formation zones and stratigraphy profiles of snow pits. This is a key issue that attracts more attention. In this paper new division of ice formation zones and physical properties of stratigraphy profiles is presented by study of a series of snow pits on the glacier. It is found that characteristics of stratigraphy profiles and ice formation zones on the glacier have a transformation trend from cold to warm. In addition, a strong ablation phenomenon has been found in the top of east branch, showing the percolation zone locally transform into ablation area.

关 键 词：1号冰川 成冰带 雪层剖面 雪坑 

分 类 号：P343.6[天文地球—水文科学]