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冰川冻土  2013 

祁连山冷龙岭宁缠河3号冰川表面流速特征分析

DOI: 10.7522/j.issn.1000-0240.2013.0094, PP. 834-840

Keywords: 祁连山,宁缠河3号冰川,冰川运动,表面流速

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Abstract:

2009年9月对祁连山冷龙岭宁缠河3号冰川外围建立控制网,于冰川表面布设了13根标志杆,随后分别于2010年7月、2010年9月再次对设立在冰川表面的花杆点进行测量,获取2009/2010年度、2009年9月-2010年7月与2010年7-9月3个时段宁缠河3号冰川表面流速.结果显示2009/2010年度宁缠河3号冰川最大流速出现在海拔4430m附近,为3.76m·a-1;2009年9月-2010年7月表面流速最大值出现在海拔4430m附近,为0.32m·月-1;2010年7-9月最大流速出现在海拔4380m附近,为0.47m·月-1.总体来看,2009/2010年度宁缠河3号冰川纵剖面上流速变化较为缓和,显示出流速随海拔变化而变化的规律.但不同季节表面流速在纵剖面上的分布情况不同,横剖面上主流线附近流速最大,向冰川两边逐渐递减,各观测点均平行于主流线方向向冰川末端运动,表现出冰川运动一般规律.在冰川表面运动速度观测区域内东南边缘流速略大于西北边缘,同时与规模相近的冰川运动速度相比,宁缠河3号冰川运动速度较大.

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