从遥感数据看 2000-2021 年拉达克地区的冰川质量平衡及其气候和非气候驱动因素

IF 2.8 3区 地球科学 Q2 GEOGRAPHY, PHYSICAL
Arindan Mandal, Bramha Dutt Vishwakarma, Thupstan Angchuk, Mohd Farooq Azam, Purushottam Kumar Garg, Mohd Soheb
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引用次数: 0

摘要

本研究调查了拉达克地区几乎所有冰川的大地测量质量平衡,这些冰川对当地的水安全至关重要。利用 2000 年和 2021 年的多个数字高程模型,我们估算了冰川的质量平衡。利用ERA5-Land再分析数据,并通过现场气候数据进行评估,探讨了冰川质量平衡的气候驱动因素。研究还探讨了非气候(形态)变量对冰川质量平衡的影响。研究结果表明,2000-2021 年期间,拉达克冰川的质量平衡为负值,且存在显著的空间差异。拉达克西部冰川的质量损失(-0.35 ± 0.07 至 -0.37 ± 0.07 m w.e. a-1)略高于拉达克东部冰川(-0.21 ± 0.07 至 -0.33 ± 0.05 m w.e. a-1)。虽然气候变暖是拉达克冰川大范围质量损失的主要驱动因素,但质量损失的空间变化则归因于区域降水量和冰川形态环境的变化。拉达克东部的冰川面积较小,海拔较高,质量损失较小;而拉达克西部的冰川面积较大,海拔较低,更容易受到温度的影响,导致质量损失较大。这项研究强调,与东部冰川相比,拉达克西部冰川更容易受到气候变暖的影响。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Glacier mass balance and its climatic and nonclimatic drivers in the Ladakh region during 2000–2021 from remote sensing data

This study investigates the geodetic mass balance of nearly all glaciers in the Ladakh region, which are crucial for local water security. Utilizing multiple digital elevation models from 2000 and 2021, we estimate glacier mass balances. Climatic drivers of glacier mass balances are explored using ERA5-Land reanalysis data, evaluated by in situ climate data. The study also examines the role of nonclimatic (morphological) variables on glacier mass balances. Results indicate Ladakh glaciers experienced negative mass balances during 2000–2021, with significant spatial variability. Western Ladakh glaciers lost slightly higher mass (−0.35 ± 0.07 to −0.37 ± 0.07 m w.e. a−1) than eastern Ladakh glaciers (−0.21 ± 0.07 to −0.33 ± 0.05 m w.e. a−1). While warming is the main driver of widespread mass loss in Ladakh, the spatial variability in mass loss is attributed to changes in regional precipitation and glacier morphological settings. Eastern Ladakh glaciers, being smaller and at higher elevations, experience lower mass loss, whereas western Ladakh glaciers, larger and at lower elevations, are more susceptible to the impact of temperature, resulting in higher mass loss. The study underscores the potentially greater vulnerability of western Ladakh glaciers to a warming climate compared to their eastern counterparts.

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来源期刊
Journal of Glaciology
Journal of Glaciology 地学-地球科学综合
CiteScore
5.80
自引率
14.70%
发文量
101
审稿时长
6 months
期刊介绍: Journal of Glaciology publishes original scientific articles and letters in any aspect of glaciology- the study of ice. Studies of natural, artificial, and extraterrestrial ice and snow, as well as interactions between ice, snow and the atmospheric, oceanic and subglacial environment are all eligible. They may be based on field work, remote sensing, laboratory investigations, theoretical analysis or numerical modelling, or may report on newly developed glaciological instruments. Subjects covered recently in the Journal have included palaeoclimatology and the chemistry of the atmosphere as revealed in ice cores; theoretical and applied physics and chemistry of ice; the dynamics of glaciers and ice sheets, and changes in their extent and mass under climatic forcing; glacier energy balances at all scales; glacial landforms, and glaciers as geomorphic agents; snow science in all its aspects; ice as a host for surface and subglacial ecosystems; sea ice, icebergs and lake ice; and avalanche dynamics and other glacial hazards to human activity. Studies of permafrost and of ice in the Earth’s atmosphere are also within the domain of the Journal, as are interdisciplinary applications to engineering, biological, and social sciences, and studies in the history of glaciology.
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