%0 Dataset %T Ice tongue end retreat of big and small Dongkemadi glaciers in 2012-2016 %J National Cryosphere Desert Data Center %I National Cryosphere Desert Data Center(www.ncdc.ac.cn) %U http://www.ncdc.ac.cn/portal/metadata/b8530ca6-d2dc-4d2a-a152-6135ebc4c0d0 %W NCDC %R 10.12072/ncdc.CCI.db0025.2020 %A He xiaobo %K The distance from the end of 2013-2014 %X This data is used to monitor the ice tongue end retreat of dadongkemadi glacier in Tanggula from 2012 to 2016. The measuring points are 1 ᦇ - 6 ා, with a total of six actual control points. The data is composed of field appearance and laboratory processing, and the South mapping S86 GPS receiver is used to measure the distance between the control rod at the end of the ice tongue and the end of the ice tongue. Firstly, the field control is implemented, including the directional direction and the situation of the measuring rod; secondly, the later limit value control (according to the historical data and the situation of the ice tongue end on site). The observation time is 2012-2016, 4-5 times a year.