气候变化领域集成服务门户(CCPortal): 珠穆朗玛峰北坡东绒布冰川成冰作用的新认识

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	珠穆朗玛峰北坡东绒布冰川成冰作用的新认识
其他题名	New Knowledge of Transformation of Snow to Ice in the East Rongbuk Glacier, Northern Slope of Mount Qomolangma (Everest)
	康世昌; 秦大河; 任贾文; 张东启; 秦翔
发表日期	2005
ISSN	1000-0690
卷号	25 期号:4 页码:415-419
中文摘要	冰川成冰作用的研究对于选择冰芯钻取点具有重要的科学意义.前人对珠穆朗玛峰北坡冰川成冰作用的研究,由于缺少高海拔区域的实测资料而具有一定的局限性.文章通过1998年东绒布冰川垭口处(6 500 m a.s.l.)11m冰芯和海拔6 450 m处20 m冰芯剖面的成冰作用过程研究,认识到由于水、热条件的逐年波动,冰川成冰作用也处于变化之中.珠穆朗玛峰北坡东绒布冰川高海拔区域,在一定的水、热条件下(如气温较低和降水量较大等),再冻结-重结晶作用依然占主导地位,该成冰作用至少在垭口部位是有分布的.而一般在气温较高或降水量较少等条件下,冰川的成冰作用则以冷渗浸-重结晶作用为主.
英文摘要	Researches in transformation of snow to ice are significant for choosing ice coring site. Due to lacking of observed data at higher elevation, earlier studies on the transformation of snow to ice were very limited in the East Rongbuk Glacier, northern slope of Mount Qomolangma. During September, 1998, the ice coring project has been carried out on the northern slope of Mount Qomolangma. The analysis of an 11 m ice core at the col (6500 m a. s. 1. ) and a 20 m ice core at an elevation of 6 450 m in the East Rongbuk Glacier indicates that transformation of snow to ice is varying annually, which may depend on variation of air temperature and precipita-tion amount. In the high elevation region of the East Rongbuk Glacier, the refrozen-recrystallization is dominant in transforming of snow to ice at die certain conditions, such as low summer temperature or high precipitation. In another word, the refrozen-recrystallization zone does exist in the East Rongbuk Glacier (at least at the col of the glacier). The cold percolation-recrystallization is major transforming process from snow to ice when summer tem-perature is high or precipitation is low. The result clarifies the uncertainties of transformation of snow to ice in the high elevation over the Himalayas. It also encourages us to recover ice cores that have reliable records from the accumulation area of glacier at the high elevation of the Himalayas.
关键词	珠穆朗玛峰北坡冰川成冰作用
英文关键词	northern slope of Mount Qomolangma;transformation of snow to ice;East Rongbuk Glacier
语种	中文
来源期刊	地理科学
来源机构	中国科学院西北资源环境生态研究院
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/89733
推荐引用方式 GB/T 7714	康世昌,秦大河,任贾文,等. 珠穆朗玛峰北坡东绒布冰川成冰作用的新认识[J]. 中国科学院西北资源环境生态研究院,2005,25(4):415-419.
APA	康世昌,秦大河,任贾文,张东启,&秦翔.(2005).珠穆朗玛峰北坡东绒布冰川成冰作用的新认识.地理科学,25(4),415-419.
MLA	康世昌,et al."珠穆朗玛峰北坡东绒布冰川成冰作用的新认识".地理科学 25.4(2005):415-419.