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DOI	10.1016/j.rse.2020.111777
	Which heterogeneous glacier melting patterns can be robustly observed from space? A multi-scale assessment in southeastern Tibetan Plateau
	Ke L.; Song C.; Yong B.; Lei Y.; Ding X.
发表日期	2020
ISSN	00344257
卷号	242
英文摘要	Region-wide investigation of glacier change in High Mountain Asia marked the strongest recession in southeastern Tibetan Plateau (SETP) in recent decades. However, evident differences of quantitative glacier mass balance (MB) estimations on fine scales exist in the prior reports. The large uncertainties in current geodetic observations over this region highlight the need for more independent validations and investigations on the spatial variability of glacier change. This study enriched glacier MB estimates over the SETP by using the newly released global Digital Elevation Model (DEM) - the TanDEM-X and analyzed the spatial pattern of glacier change on multi-spatial scales by comparing available satellite-based geodetic observations. Results reveal that the TanDEM-X - SRTM elevation differences, which show no obvious horizontal shifts and no significant elevation-dependent bias, provide reliable elevation change information over this challenging area. On the regional scale, the geodetic datasets (the ASTER elevation change rates data, TanDEM-X- SRTM differences, ICESat) achieved a highly consistent estimate of glacier MB at −4.11 ± 1.52 Gt a−1 (−0.60 ± 0.16 m w.e. a−1) during 2000 and 2010s. On the subregional scale, the two gridded geodetic datasets revealed a clear contrast between moderate thinning of spring-accumulation type glaciers in the south and significantly more negative glacier MB of summer-accumulation type glaciers in the north. Glacier-wide MB showed high heterogeneity, which was closely related to the combined effect of topographic variation and climate forcings. We observed similar glacier thinning rates between debris-covered land-terminating glaciers and clean-ice glaciers (−0.50 ± 0.32 m w.e. a−1) but remarkable more negative MB (−0.89 ± 0.36 m w.e. a−1) of debris-covered glaciers connected with glacial lakes, which may indicate different evolution process of debris-covered glaciers in the monsoon-influenced region. This study demonstrates that current satellite-based geodetic observations achieve overall consistent patterns of glacier mass changes even over the most challenging mountainous areas (complicated terrain and climate). With the global TanDEM-X DEM and increasing observations from the mission, we expect improved consistency in glacier MB estimation on large spatial scales as well as detailed investigation of glacier mass change variability in the future. © 2020 Elsevier Inc.
英文关键词	Debris-covered glaciers; Glacier mass balance; Southeastern Tibetan Plateau; TanDEM-X
语种	英语
scopus关键词	Debris; Geodesy; Geodetic satellites; Tracking radar; Complicated terrain; Debris covered glaciers; Different evolutions; Digital elevation model; Geodetic observation; Glacier mass balance; TanDEM-X; Tibetan Plateau; Surveying; assessment method; ASTER; digital elevation model; glacier mass balance; observational method; TanDEM-X; Asia; Qinghai-Xizang Plateau
来源期刊	Remote Sensing of Environment
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/179352
作者单位	State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Hohai University, Nanjing, 210098, China; Key Laboratory of Watershed Geographic Sciences, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing, 210008, China; School of Earth Sciences and Engineering, Hohai University, Nanjing, 211100, China; Key Laboratory of Tibetan Environment Changes and Land Surface Processes, Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing, 100101, China; Department of Land Surveying and Geo-informatics, The Hong Kong Polytechnic University999077, Hong Kong
推荐引用方式 GB/T 7714	Ke L.,Song C.,Yong B.,et al. Which heterogeneous glacier melting patterns can be robustly observed from space? A multi-scale assessment in southeastern Tibetan Plateau[J],2020,242.
APA	Ke L.,Song C.,Yong B.,Lei Y.,&Ding X..(2020).Which heterogeneous glacier melting patterns can be robustly observed from space? A multi-scale assessment in southeastern Tibetan Plateau.Remote Sensing of Environment,242.
MLA	Ke L.,et al."Which heterogeneous glacier melting patterns can be robustly observed from space? A multi-scale assessment in southeastern Tibetan Plateau".Remote Sensing of Environment 242(2020).