气候变化领域集成服务门户(CCPortal): Glacial changes in the Hunza Basin, western Karakoram, since the Little Ice Age

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DOI	10.1016/j.palaeo.2020.110086
	Glacial changes in the Hunza Basin, western Karakoram, since the Little Ice Age
	Qureshi, Muhammad Ateeq; Li, Yingkui; Yi, Chaolu; Xu, Xiangke
通讯作者	Li, YK (通讯作者)
发表日期	2021
ISSN	0031-0182
EISSN	1872-616X
卷号	562
英文摘要	Glaciers have remained relatively stable in the Karakoram over the past few decades, in contrast to rapid retreat in other regions of the Tibetan Plateau and its surrounding mountains. This study investigated glacial changes in the Karakoram since the Little Ice Age (LIA) to examine if this relatively stable scenario has occurred for a longer term. We mapped 432 contemporary glaciers and their corresponding 313 LIA glaciers in the Hunza Basin, western Karakoram, using Google Earth and Landsat images. We also derived geomorphometric parameters for each glacier using the Shuttle Radar Topographic Mission digital elevation model and reconstructed the equilibrium line altitudes (ELAs) for both contemporary and LIA glaciers based on the toe-to-ridge altitude method. Our results revealed 6.6% decrease in the total area, 14.5% shortening in the total length along the flowline of each LIA glacier, and approximately 98 m rising in the mean ELA since the LIA. The relative area reduction was strongly affected by geomorphometric factors and small glaciers tended to experience relatively large areal reductions. In contrast, the change in ELA was not strongly affected by glacial area but had some correlations with slope and mean elevation. Compared to other areas on the Tibetan Plateau and its surrounding mountains, glacial changes have been less extensive in the Hunza Basin since the LIA. These findings confirmed a relatively stable behavior of glaciers in this area since the LIA and a strong control of local geomorphometric characteristics on glacial change.
关键词	BE-10 SURFACE EXPOSURE EASTERN TIAN-SHAN TIEN-SHAN QUATERNARY GLACIATIONS TIBETAN PLATEAU MOUNTAIN RANGE CHINA HIMALAYA AREA
英文关键词	Geomorphological mapping; Geomorphometric factors; Equilibrium line altitude; Google Earth; Landsat imagery; Tibetan Plateau
语种	英语
WOS研究方向	Physical Geography ; Geology ; Paleontology
WOS类目	Geography, Physical ; Geosciences, Multidisciplinary ; Paleontology
WOS记录号	WOS:000604584600022
来源期刊	PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/260338
推荐引用方式 GB/T 7714	Qureshi, Muhammad Ateeq,Li, Yingkui,Yi, Chaolu,et al. Glacial changes in the Hunza Basin, western Karakoram, since the Little Ice Age[J]. 中国科学院青藏高原研究所,2021,562.
APA	Qureshi, Muhammad Ateeq,Li, Yingkui,Yi, Chaolu,&Xu, Xiangke.(2021).Glacial changes in the Hunza Basin, western Karakoram, since the Little Ice Age.PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,562.
MLA	Qureshi, Muhammad Ateeq,et al."Glacial changes in the Hunza Basin, western Karakoram, since the Little Ice Age".PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY 562(2021).