1973-2018年布喀达坂峰地区前进冰川遥感监测

doi:10.31497/zrzyxb.20190808

Abstract

Abstract:

Glacier surging is a performance of glacial dynamic instabilities, which affects about 1% of glaciers worldwide. Glacier surge refers to the periodically rapid movement of glacier in a short period of time (2-3 a). Compared with the monitoring of ice crevasse change in glacier ablation area and the elevation change of glacier surface, the advance of glacier terminal is the most obvious feature to identify the surging glacier from remote sensing image. Based on 208 Landsat MSS/TM/ETM+/OLI remote sensing images from 1973 to 2018, advancing glaciers at different periods in the Bukatage Mountains are recognized. Meanwhile, we have explored the factors affecting the advance of glacier with the combination of meteorological data and established the variational mode of surge glacier terminal on the basis of the existing research for surging glaciers to lay a foundation for the study of the mechanism of glacier surging in this region and provide the basis for the Chinese Advancing Glacier Dataset. The results showed that: (1) There were 7 advancing glaciers in the Bukatage Mountains range from 1973 to 2018, among which 3 glaciers were in the state of fluctuating retreat and 2 glaciers in the state of advancing and fluctuating stability. We inferred that Monuomaha Glacier and the 5Y542H0020 Glacier belonged to surging glaciers, whose fronts were in an active phase. (2) There were 25 advance events for these 7 advancing glaciers in the past 45 years. The frequency of each glacier advance was more than or equal to 2 times and the time of advance was focused on the 2000s (7 times) and the 1970s (6 times). Additionally, glacier advance occurred in each month, so these advancing glaciers probably belonged to Svalbard glacier. There was no obvious pattern of the glacier advance in the Bukatage Mountains. The time interval between two advances of most glaciers was 10 years. (3) The terminals of advancing glaciers in the Kunlun Mountains exerted different changing patterns because of the geographical location, glacier velocity, glacier morphology and etc. The glacial stage lasted 5 years and was longer compared with other areas of China. These 7 advancing glaciers are shown as the modes of terminal change of the "repeated type" in the Bukatage Mountains range. It was hard to solely explain the trigger mechanism that is so complex in the Kunlun Mountains.

Key words: advancing glacier, glacier surges, remote sensing monitoring, Bukatage Mountains

GAO Yong-peng, YAO Xiao-jun, LIU Shi-yin, QI Miao-miao, DUAN Hong-yu, LIU Juan, ZHANG Da-hong. Remote sensing monitoring of advancing glaciers in the Bukatage Mountains from 1973 to 2018[J].JOURNAL OF NATURAL RESOURCES, 2019, 34(8): 1666-1681.

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References 66

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CGI编码	GLIMS编码	名称	面积/km²	朝向	平均坡度/°	冰裂隙	最大前进距离/m
5Y542H0013	G090819E36011N		1.58	NW	24.76		95
5Y542H0018	G090846E36001N		5.77	S	24.59	发育	658
5Y542H0020	G090868E35998N		8.28	S	24.57	发育	898
5Y542H0023	G090901E36002N	足冰川	22.75	SE	21.29	发育	281
5Y542H0034	G091032E36060N	莫诺马哈冰川	89.55	S	15.12	发育	1027
5Z112D0009	G090837E36060N		28.48	N	17.39	发育	344
5Z112D0008	G090884E36076N	西莫诺马哈冰川	68.65	NW	13.84	发育	1053

CGI编码	GLIMS编码	名称	前进日期
5Y542H0013	G090819E36011N		2002/5/14,2014/7/2
5Y542H0018	G090846E36001N		1976/11/13,1977/7/22,1987/5/5,2005/12/24,2016/1/13
5Y542H0020	G090868E35998N		1977/4/28,2010/4/26
5Y542H0023	G090901E36002N	足冰川	1976/11/13,1990/12/23,2000/4/14,2001/11/19,2013/4/5
5Y542H0034	G091032E36060N	莫诺马哈冰川	1977/7/22,1989/7/29,1992/9/7,2006/3/14,2007/4/18,2009/9/30
5Z112D0009	G090837E36060N		1976/11/13,1987/6/22,2003/9/22
5Z112D0008	G090884E36076N	西莫诺马哈冰川	1989/7/29,1990/12/7

Remote sensing monitoring of advancing glaciers in the Bukatage Mountains from 1973 to 2018

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传感器类型	轨道号及影像数量/景			空间分辨率/m
传感器类型	141035	145035	139035	空间分辨率/m
MSS	—	—	11	60
TM	22	14	51	30
ETM+	1	10	53	30
OLI	4	4	38	30

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