Cryospheric and Polar Processes Seminar
The glacier inventory and surge-type glacier study in China by Wanqin Guo, Associate Professor, Visiting Scholar from State Key Laboratory of Cryospheric Sciences, Northwest Institute of Eco-Environmental and Resources, Chinese Academy of Science, Lanzhou, China.
The compilation of the first Chinese glacier inventory (CGI-1) was completely finished in 2002. It mainly used topographical maps made from aerial photographs taken during 1950s-1980s. The second Chinese glacier inventory (CGI-2) has been compiled since 2008 based on remote sensing and GIS techniques, and by using Landsat images acquired primarily during 2007-2010. Intensive manual work was involved to ensure the precise location of the glaciers' outlines. The first version of CGI-2 was formally released in 2014, and was then merged into the GLIMS database and the RGI dataset. The updates of the new version of CGI-2 (V2.0) come to an end this year. This version focused on the compilation of the latest glacier inventory of hte southeast Tibetan Plateau, where good quality satellite images can rarely be found during 2005-2011. Thus, glacier outlines of this region in CGI-2 V1.0 were replaced by a newly digitized CGI-1 dataset.
The frequent occurrences of glacier surge events and related glacial hazards in recent years have drawn a lot of attention. Many collaborative works have been done to study these glacier surge events, which reveal the stimulating impacts of climate change on the occurrences of such events. Anyemaqen Mountain is a key monitoring center on surge-type glaciers on the northeastern edge of Tibetan Plateau, with 10 surge-type glaciers (4 of them are in active phase right now). Another undergoing work is the detailed investigation of a surge-type glacier over high mountain Asia aimed at building their catalogue, and evaluate the probabilities of their recent surge as well as the possible disasters that may be induced.
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