Japan Geoscience Union Meeting 2018

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[JJ] Oral

A (Atmospheric and Hydrospheric Sciences) » A-CC Cryospheric Sciences & Cold District Environment

[A-CC28] Glaciology

Wed. May 23, 2018 10:45 AM - 12:15 PM 106 (1F International Conference Hall, Makuhari Messe)

convener:Takayuki Nuimura(Chiba Institute of Science), Ishikawa Mamoru(Hokkaido University), Kzutaka Tateyama(国立大学法人　北見工業大学, 共同), Hiroto Nagai(Japan Aerospace Exploration Agency), Chairperson:Sunako Sojiro(Graduate School of Environmental Studies, Nagoya University.)

11:30 AM - 11:45 AM

[ACC28-10] Recent variability of glacial lakes and geomorphological conditions in the northern Tien Shan

*Chiyuki Narama1, Mirlan Daiyrov2, Tsutomu Yamanokuchi3, Takeo Tadono4 (1.Niigata University, Department of Science, 2.Niigata University, Graduate school of Science and Technology, 3.RESTEC, 4.JAXA)

Keywords:lake variability, debris landform, Tien Shan

To assess the current state of glacial lakes, we examine the seasonal variability of 339 glacial lakes in the Teskey and Kungoy Ranges of the Issyk-Kul Basin, Kyrgyzstan, during 2013–2016 based on optical satellite images (Landsat7 ETM+ and 8 OLI). The glacial lakes are classified into six types based on their annual variations in area: stable, increasing, decreasing, appearing, vanishing, and short-lived. We find that many appearing, vanishing, and short-lived types occurred in both mountain ranges, having a large variability that is not directly related to glacier recessions. The large lake variability over such short periods arises from regional geomorphological conditions and not directly from the local short-term climate variations.