Title: The active-layer ice temperature increases more obviously on a cold glacier than a temperate glacier during the past 30 years
Authors: Shijin Wang; Baohong Ding
State Key Laboratory of Cryospheric Sciences, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou Gansu 730000, China
Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing 100101, China
Abstract: On the basis of the historical documents and measured active-layer ice temperatures (ALITs) on Baishui Glacier No. 1 (BG1), Yulong Snow Mountains, Southeastern Tibetan Plateau and Urumqi Glacier No. 1 (UG1), the eastern Tien Shan Mountains, Central Asia, this paper revealed and compared their inter-decadal response of the ALIT in the past 30 years. The results showed that the daily mean ALIT increased by 0.24°C at the range of 0.50~9.80 m on BG1 (4,670 m a.s.l.) from July 11, 1982 to July 10, 2009. The rapid increase of the ALIT is found similarly on UG1 (3,840 m a.s.l.), and its increase magnitude for the last 21 years from 1986 to 2006 is nearly 0.83° at 1~20 m depth, obviously higher than BG1 during the period 1982~2009. Empirical experiments also proved that the ALIT is higher on a temperate glacier than a cold (continental) glacier and a temperate glacier retreated faster evidently than a cold glacier, but the ALIT increases more significantly on a cold glacier than a temperate glacier with regional climatic warming.
Keywords: active-layer ice temperature; ALIT; inter-decadal variation; comparative study.
Int. J. of Global Warming, 2017 Vol.13, No.1, pp.103 - 111
Available online: 24 Jul 2017