Changes in the glacier extent and surface elevation along the Ningchan and Shuiguan river source, eastern Qilian Mountains, China

Quaternary Research - Tập 81 - Trang 531-537 - 2014
Bo Cao1, Baotian Pan1, Jie Wang1, Donghui Shangguan2, Zhenling Wen1, Wentao Qi1, Hang Cui1, Yaoyang Lu1
1MOE Key Laboratory of Western China's Environmental Systems, Collaborative Innovation Centre for Arid Environments and Climate Change, Lanzhou University, Gansu, Lanzhou 730000, China
2State Key Laboratory of Cryospheric Science, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China

Tóm tắt

AbstractWe investigate the changes at nine glaciers in the Ningchan and Shuiguan river source, eastern Qilian Mountains, between 1972 and 2010. According to analysis of topographic maps and multispectral satellite data, all nine glaciers in the study area have retreated, by a maximum of 250 ± 57.4 m and a minimum of 91 ± 57.4 m. The total glacier area decreased by 1.20 km2, corresponding to 9.9% of the glacierized area in 1972. Comparing the two DEMs generated from the topographic maps and Real-Time Kinematic GPS data, the mean glacier thinning rate was 0.64 m yr− 1 between 1972 and 2010. The most significant thinning generally occurred on the termini. The ice-volume loss was about 106.8 ± 46.7 × 10− 3 km3 (equal to 90.8 ± 39.7 × 10− 3 km3 w.e.), which suggested a mean water discharge of 0.1 ± 0.05 m3/s during 1972–2010. Based on analysis of meteorological data, the summer temperature (June–August) tends to increase over a similar time period. The consistency of temperature increase and glacier shrinkage allows us to suggest that air temperature plays an important role in glacier changes in this region.

Tài liệu tham khảo

10.3189/2012JoG12J032 10.1360/03yd0256 10.1016/S0921-8181(99)00040-5 10.1038/ngeo1052 Li, 2011, Monitoring thickness and volume changes of the Dongkemadi Ice Field on the Qinghai-Tibetan Plateau (1969–2000) using Shuttle Radar Topography Mission and map data, International Journal of Digital Earth, 1 10.1017/S0260305500011964 10.3189/172756504781829747 10.3189/172756410790595804 10.1029/2004GL020816 10.1038/nclimate1580 10.1002/hyp.8286 10.1109/TGRS.2006.875357 10.1126/science.1143906 10.1029/2010JF001751 Wang, 2009, Study on the zone of maximum precipitation in the North slopes of central Qilian Mountains, Journal of Glaciology and Geocryology, 31, 395 10.1007/s11629-010-1124-1 Xie, 1985, Recent advance and retreat of glaciers in Qilian Mountains, Memoirs of Lanzhou Institute of Glaciology and Geocryology Chinese Academy of Sciences, No. 5, 82 10.1016/j.gloplacha.2012.05.025 10.1016/j.cageo.2006.05.015 10.5194/tc-6-301-2012 10.3189/172756505781829557 10.1080/01431160600851819 Wang, 2003, Problem of coordinate transformation between WGS-84 and BEIJING 54, Journal of Geodesy and Geodynamics, 23, 70 Liu, 1992, Recent change and trend prediction of glaciers in Qilian Mountain, Memoirs of Lanzhou Institute of Glaciology and Geocryology Chinese Academy of Sciences, No. 7, 1 10.3189/2013AoG63A296 10.3189/002214310791190884 Liu, 2003, Glacier changes since the Little Ice Age maximum in the western Qilian Shan, northwest China, and consequences of glacier runoff for water supply, Journal of Glaciology, 49, 117, 10.3189/172756503781830926 10.1073/pnas.1008162107 Wang, 1981, Glacier Inventory of China I. Qilian Mountains Lemke, 2007, Observations: changes in snow, ice and frozen ground 10.5194/tc-5-349-2011 10.1126/science.1234532 10.1016/S0034-4257(03)00134-2 10.1029/2006GL027511 10.1016/j.rse.2005.07.004 10.1016/j.quascirev.2007.10.017 10.1007/s10712-011-9124-4 10.3189/172756406781812005 10.1038/nature10847 10.1126/science.1107046 10.1126/science.1138478 Elizabeth, 2011, A review of higher order ionospheric refraction effects on dual frequency GPS, Surveys in Geophysics, 32, 197, 10.1007/s10712-010-9105-z 10.3189/172756506781828359 10.1029/2005GL024178 10.1029/2004GL020706 10.1029/2012GL052823 10.3189/172756406781812168 10.1016/j.gloplacha.2006.07.009 10.5194/tc-7-877-2013 10.3189/002214310794457362 10.3189/002214310791968566 10.1126/science.1087393 10.1007/BF02886048 10.1016/j.rse.2004.12.012 10.3189/172756406781812393 10.1002/hyp.8256 10.3390/s8053355 10.1016/j.gloplacha.2008.04.003 10.1016/j.gloplacha.2006.07.016 10.1016/j.rse.2007.11.004
Thông tin
Thông tin xuất bản

Quaternary Research

Tập 81

531-537

Thông tin tác giả