DOI: 10.3389/feart.2019.00363
论文题名: A Systematic, Regional Assessment of High Mountain Asia Glacier Mass Balance
作者: Shean D.E. ; Bhushan S. ; Montesano P. ; Rounce D.R. ; Arendt A. ; Osmanoglu B.
刊名: Frontiers in Earth Science
ISSN: 22966463
出版年: 2020
卷: 7 语种: 英语
英文关键词: ASTER
; digital elevation model (DEM)
; geodetic
; high-resolution satellite imagery
; Himalaya
; hydrology
; photogrammetry
; WorldView
英文摘要: High-mountain Asia (HMA) constitutes the largest glacierized region outside of the Earth's polar regions. Although available observations are limited, long-term records indicate sustained HMA glacier mass loss since ~1850, with accelerated loss in recent decades. Recent satellite data capture the spatial variability of this mass loss, but spatial resolution is coarse and some estimates for regional and HMA-wide mass loss disagree. To address these issues, we generated 5,797 high-resolution digital elevation models (DEMs) from available sub-meter commercial stereo imagery (DigitalGlobe WorldView-1/2/3 and GeoEye-1) acquired over HMA glaciers from 2007 to 2018 (primarily 2013–2017). We also reprocessed 28,278 ASTER DEMs over HMA from 2000 to 2018. We combined these observations to generate robust elevation change trend maps and geodetic mass balance estimates for 99% of HMA glaciers between 2000 and 2018. We estimate total HMA glacier mass change of −19.0 ± 2.5 Gt yr−1 (−0.19 ± 0.03 m w.e. yr−1). We document the spatial pattern of HMA glacier mass change with unprecedented detail, and present aggregated estimates for HMA glacierized sub-regions and hydrologic basins. Our results offer improved estimates for the HMA contribution to global sea level rise in recent decades with total cumulative sea-level rise contribution of ~0.7 mm from exorheic basins between 2000 and 2018. We estimate that the range of excess glacier meltwater runoff due to negative glacier mass balance in each basin constitutes ~12–53% of the total basin-specific glacier meltwater runoff. These results can be used for calibration and validation of glacier mass balance models, satellite gravimetry observations, and hydrologic models needed for present and future water resource management. © Copyright © 2020 Shean, Bhushan, Montesano, Rounce, Arendt and Osmanoglu. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/159991
Appears in Collections: 气候变化与战略
There are no files associated with this item.
作者单位: Civil and Environmental Engineering, University of Washington, Seattle, WA, United States; Goddard Space Flight Center, Greenbelt, MD, United States; Science Systems and Applications, Inc, Greenbelt, MD, United States; Geophysical Institute, University of Alaska Fairbanks, Fairbanks, AK, United States; Applied Physics Laboratory, University of Washington, Seattle, WA, United States; eScience Institute, University of Washington, Seattle, WA, United States
Recommended Citation:
Shean D.E.,Bhushan S.,Montesano P.,et al. A Systematic, Regional Assessment of High Mountain Asia Glacier Mass Balance[J]. Frontiers in Earth Science,2020-01-01,7