16 October 2013 11-year variability of summer snow cover extent over Himalayas
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Abstract
Snow is a component of the cryosphere which has played an important role in Earth energy balance. Northern hemisphere snow cover extent (SCE) has steadily decreased since 1980 and in recently the trend of SCE is sharply decreased. Because Himalaya region's shows most significant changes except for the Arctic, we analyzed this region for SCE. We used Moderate Resolution Imaging Spectroradiometer (MODIS) snow product from 2001 to 2011 in august. Analysis was made by considering some conditions (region, elevation, longitude and climate) which can affect the changes in SCE. The entire SCE in Himalaya for 11 years has steadily increased(+55,098 km2). Trends for SCE in western region has increased(+77,781km2), But trend for central and eastern have decreased -3,453 km2, -19,230km2, respectively. According to elevation increases, the ratio of snow in each study area is increased. In 30°N~35°N SCE shows increased trend, 27°N~28°N shows decreased trend. In tundra climate, trends for SCE are similar to regional analysis. whereas the result in tropical climate's trend was increased. these performed result shows different side for change of SCE depending on each condition. The result of this study were similar to the rapid decline of the northern hemisphere SCE area in recent. The result of this study can be used to help management to water budget in Central-Asia country located to Himalayas.
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Jung-Mok Ha, Jung-Mok Ha, Kyung-Soo Han, Kyung-Soo Han, Jae-Il Cho, Jae-Il Cho, Chang-Suk Lee, Chang-Suk Lee, Kyoung-jin Pi, Kyoung-jin Pi, In-Hwan Kim, In-Hwan Kim, Jae-Hyun Ryu, Jae-Hyun Ryu, Eun-Bin Park, Eun-Bin Park, } "11-year variability of summer snow cover extent over Himalayas", Proc. SPIE 8887, Remote Sensing for Agriculture, Ecosystems, and Hydrology XV, 88871K (16 October 2013); doi: 10.1117/12.2029146; https://doi.org/10.1117/12.2029146
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