气候变化领域集成服务门户(CCPortal): Decadal Changes in Glacier Area, Surface Elevation and Mass Balance for 2000-2020 in the Eastern Tanggula Mountains Using Optical Images and TanDEM-X Radar Data

CCPortal

DOI	10.3390/rs14030506
	Decadal Changes in Glacier Area, Surface Elevation and Mass Balance for 2000-2020 in the Eastern Tanggula Mountains Using Optical Images and TanDEM-X Radar Data
	Zhou, Yushan; Li, Xin; Zheng, Donghai; Zhang, Xiaolong; Wang, Yingzheng; Ren, Shanshan; Guo, Yanlong
通讯作者	Li, X (通讯作者)
发表日期	2022
EISSN	2072-4292
卷号	14 期号:3
英文摘要	The response of lake-terminating glaciers to climate change is complex, and their rapid changes are often closely linked to glacial-lake outburst floods. However, the eastern Tanggula Mountains, which are the only area where lake-terminating glaciers are found within the Tibetan Plateau, have received little attention to date. In this study, to address this gap, we generated updated glacier boundaries and estimated the interdecadal area changes for 2000-2020 based on the interpretation of Landsat-5/8 and Sentinel-2 images. In addition, based on the method of digital elevation model (DEM) differencing, we quantified the changes in glacier thickness and mass balance using TanDEM-X radar data and SRTM DEM over almost the same periods. The final results show that the glaciers in the eastern Tanggula Mountains, as a whole, have experienced accelerated area shrinkage (with a rate of area loss increasing from -0.34 +/- 0.83 km(2) a(-1) to -0.93 +/- 0.81 km(2) a(-1) for 2000-2013 and 2013-2020, respectively) and accelerated ice thinning (changing from -0.19 +/- 0.05 m a(-1) and -0.53 +/- 0.08 m a(-1) for 2000-2012 and 2012-2020, respectively). Furthermore, the region-wide glacier mass balance was -0.16 +/- 0.04 m w.e. a(-1) and -0.45 +/- 0.07 m w.e. a(-1) for these two sub-periods, corresponding to a 1.8 times acceleration of mass loss rate. The average mass balance during 2000-2020 was -0.23 +/- 0.04 m w.e. a(-1), which is equivalent to a rate of mass loss of -0.04 Gt a(-1). More specifically, within the region, the lake-terminating glaciers have exhibited more significant acceleration of area loss and mass loss, compared to the land-terminating glaciers. However, interestingly, the average thinning rate of the lake-terminating glaciers is always lower than that of the land-terminating glaciers over all study periods, which is in contrast with previous findings in other high mountain areas (e.g., the Himalaya Mountains). Field study and proglacial lakes monitoring suggest that the local topography plays a vital role in the evolution of the glacial lakes in this region, which further affects the glacier changes. Furthermore, the present status of the glacier changes in this region can be attributed to the long-term increase in air temperature. Our findings provide a comprehensive overview of the current state of glacier changes across the eastern Tanggula Mountains and will help to improve the understanding of the heterogeneous response of glaciers to climate change.
关键词	LAND-TERMINATING GLACIERS TIBETAN PLATEAU ICE CAP LAKE HIMALAYA REGION PENETRATION RESOLUTION EVOLUTION IMPACT
英文关键词	remote sensing; glacier changes; lake-terminating glacier; Tanggula Mountains; TanDEM-X
语种	英语
WOS研究方向	Environmental Sciences & Ecology ; Geology ; Remote Sensing ; Imaging Science & Photographic Technology
WOS类目	Environmental Sciences ; Geosciences, Multidisciplinary ; Remote Sensing ; Imaging Science & Photographic Technology
WOS记录号	WOS:000756498700001
来源期刊	REMOTE SENSING
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/260581
推荐引用方式 GB/T 7714	Zhou, Yushan,Li, Xin,Zheng, Donghai,et al. Decadal Changes in Glacier Area, Surface Elevation and Mass Balance for 2000-2020 in the Eastern Tanggula Mountains Using Optical Images and TanDEM-X Radar Data[J]. 中国科学院青藏高原研究所,2022,14(3).
APA	Zhou, Yushan.,Li, Xin.,Zheng, Donghai.,Zhang, Xiaolong.,Wang, Yingzheng.,...&Guo, Yanlong.(2022).Decadal Changes in Glacier Area, Surface Elevation and Mass Balance for 2000-2020 in the Eastern Tanggula Mountains Using Optical Images and TanDEM-X Radar Data.REMOTE SENSING,14(3).
MLA	Zhou, Yushan,et al."Decadal Changes in Glacier Area, Surface Elevation and Mass Balance for 2000-2020 in the Eastern Tanggula Mountains Using Optical Images and TanDEM-X Radar Data".REMOTE SENSING 14.3(2022).