The mass loss of lake-terminating glaciers in the greater Himalayas has been significantly underestimated due to satellite limitations, with major implications for projections of glacier disappearance and water resources. Researchers call for incorporating subaqueous mass loss in future mass-change
The researchers found that a previous assessment underestimated the total mass loss of lake-terminating glaciers in the greater Himalayas by 6.5%. The most significant underestimation of 10% occurred in the central Himalayas, where glacial lake growth was the most rapid. A particularly interesting case is Galong Co in this region, with a high underestimation of 65%.
“These findings have important implications for understanding the impact of regional water resources and glacial lake outburst floods,” said lead author ZHANG Guoqing from the Institute of Tibetan Plateau Research, CAS.By accounting for the mass loss from lake-terminating glaciers, the researchers can more accurately assess the annual mass balance of these glaciers compared to land-terminating ones, thus further highlighting the accelerated glacier mass loss across the greater Himalayas.
“This emphasizes the importance of incorporating subaqueous mass loss from lake-terminating glaciers in future mass-change estimates and glacier evolution models, regardless of the study region,” said co-corresponding author Tobias Bolch from Graz University of Technology.
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