Glacial Lake - an overview | ScienceDirect Topics
2005年12月11日 · Glacial lake outbursts, or jökulhlaups, are very high-magnitude floods caused by the sudden drainage of water from a glacial lake. Glacial lakes form on, in, under, or in front of glaciers and are inherently unstable. Outbursts occur in many present-day glaciated regions, such as Iceland, Alaska, the Himalayas, and the Andes (Figure 1). Flood ...
Annual trajectory of global glacial lake variations and the ...
2024年10月1日 · In Asia, the count of glacial lakes larger than 1 km 2 is relatively small, numbering 122, mainly situated on the Tibetan Plateau (TP) and its surroundings. Among all the glacial lakes larger than 1 km 2 globally, there are about 948 glacier-contacted lakes, accounting for 30.3 % and 43.5 % of the total number and area, respectively. About ...
Basin-scale spatio-temporal development of glacial lakes in the ...
A large number of lakes disappeared between 3600 and 4400 m asl in the Indus basin, while in the Ganga basin, lakes largely disappeared above 4600 m asl. Glacial lakes emerged in all elevation zones in the Indus basin, while in the Ganga and Brahmaputra basins the emergence was largely confined to elevations above 5000 m asl.
Response of glacial lakes to glacier and climate changes in the …
2020年9月15日 · In this study, the glacial lakes in the WNT range are mapped using multi-temporal Landsat images. For the period 1976 to 2018, the number and area of glacial lakes show a continuous increase, with the number increasing by 56% from 192 to 299 and the total area increasing by 35% from 6.75 ± 0.13 km 2 to 9.12 ± 0.13 km 2. Most of the proglacial ...
Spatially resolved glacial meltwater retainment in glacial lakes …
2024年4月1日 · In total, we identified 4209 glacial lakes with RGM as potentially dangerous glacial lakes with outside dam angles larger than 10° (a gently sloping outside dam (<10°) was assumed to rarely initiate a breach (Koike and Takenaka, 2012)). Given a dam collapse angle larger than 10°, a total potential GLOF water volume of 21.66 ± 0.43 Gt was ...
Glacial lakes of the Central and Patagonian Andes
2018年3月1日 · Glacial lakes across the study area were shown to have increased both in number (43%) and areal extent (7%) during the ~30 year observation period. As of 2016, 4202 glacial lakes were present within three sub-regions (Central Andes, Northern Patagonia and Southern Patagonia), equating to an estimated water volume of 1853 km 3. The distribution ...
Contemporary glacial lakes in the Peruvian Andes - ScienceDirect
2021年9月1日 · Glacial lakes are important globally and regionally as (1) they represent a considerable water resource (Loriaux and Casassa, 2013), (2) when in contact with or dammed by glaciers, they can have negative impacts on glacier mass balance (e.g. King et al., 2019), and (3) they are the source of glacial lake outburst floods (GLOFs; Richardson and ...
Glacial Lake Agassiz - an overview | ScienceDirect Topics
Glacial Lake Agassiz refers to one of the largest glacial lakes in North America, which formed approximately 14,500 years ago and expanded as glaciers retreated. It varied in size depending on glacier movement and drainage availability, reaching its maximum size between 11,000 and 10,000 years ago.
Mapping of glacial lakes using Sentinel-1 and Sentinel-2 data and …
2020年12月1日 · The low density of glacial lakes in the central Pamir further indicated that the high mean area of glacial lakes in the region was due to the contribution of a few large lakes. A low density of glacial lakes was observed in the western Himalaya and central Pamir, where glacier mass loss is known to be small for the latter ( Wester et al., 2019 ).
Glacial lakes in Austria - Distribution and formation since the Little ...
2018年5月1日 · Glacial lakes are commonly associated with glacial meltwater impounded behind a barrier (Ashley, 2002). In a more general sense, glacial lakes are water bodies directly linked to glacier activity, either by glaciers carving depressions into the subglacial bedrock, providing deposits for impoundment or simply delivering meltwater to the lakes ...