Climate regime of Asian glaciers revealed by GAMDAM glacier inventory

A. Sakai, T. Nuimura, K. Fujita, S. Takenaka, Hiroto Nagai, D. Lamsal

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Abstract

Among meteorological elements, precipitation has a large spatial variability and less observation, particularly in high-mountain Asia, although precipitation in mountains is an important parameter for hydrological circulation. We estimated precipitation contributing to glacier mass at the median elevation of glaciers, which is presumed to be at equilibrium-line altitude (ELA) such that mass balance is zero at that elevation, by tuning adjustment parameters of precipitation. We also made comparisons between the median elevation of glaciers, including the effect of drifting snow and avalanche, and eliminated those local effects. Then, we could obtain the median elevation of glaciers depending only on climate to estimate glacier surface precipitation.

The calculated precipitation contributing to glacier mass can elucidate that glaciers in arid high-mountain Asia receive less precipitation, while much precipitation makes a greater contribution to glacier mass in the Hindu Kush, the Himalayas, and the Hengduan Shan due to not only direct precipitation amount but also avalanche nourishment. We classified glaciers in high-mountain Asia into summer-accumulation type and winter-accumulation type using the summer-accumulation ratio and confirmed that summer-accumulation-type glaciers have a higher sensitivity than winter-accumulation-type glaciers.

Original languageEnglish
Pages (from-to)865-880
Number of pages16
JournalCryosphere
Volume9
Issue number3
DOIs
Publication statusPublished - 2015 May 6
Externally publishedYes

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ASJC Scopus subject areas

  • Water Science and Technology
  • Earth-Surface Processes

Cite this

Sakai, A., Nuimura, T., Fujita, K., Takenaka, S., Nagai, H., & Lamsal, D. (2015). Climate regime of Asian glaciers revealed by GAMDAM glacier inventory. Cryosphere, 9(3), 865-880. https://doi.org/10.5194/tc-9-865-2015