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Monitoring Glacial Shrinkage Using Remote Sensing and Site-Observation Method on Southern Slope of Kalik Mountain, Eastern Tian Shan, China

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Journal of Earth Science 2011年第4期22卷 503-514页

作者：王文彬李开明高建芳 State Key Laboratory of Cryospheric Sciences/Tianshan Glaciological Station Cold and Arid Region Environmental and Engineering Research Institute Chinese Academy of Sciences Hydrology and water resource. Survey Bureau of Hami

Currently, one of the effective means in monitoring glacier change in regional scale is remote sensing and site-observation method. In this article, we present a study of comparing glacier area in 2005 derived from SPOT5 satellite image with area in 1972 derived from topographic maps. Moreover, Miaoergou （庙儿沟） flat-summit glacier is site observed to verify glacial change in regional scale. During the study period, glaciers located in the southern slope of Kalik （喀尔里克） Mountain re- duced their area by 12.3%. The high individual change indicates that the wastage corresponding to area changes has been the dominant process of glacier mass loss in this region. Glaciers smaller than the mean size （1.3 km2）, especially those 〈0.5 km2, lost more of their area with high variability and yielding two glaciers vanished. It is suggested that small glaciers are prone to disappear under such climate conditions in future years. With the difference supplied by upstream glaciers, there appears great disparity trend of river runoff recently. Seen from decade-scale, the discharge, the lower gla- cier-covered catchment, is decreased because of strong consumption of small glaciers during the past decades. Owing to the rivers that are supplied by more meltwater from medium and larger glaciers mainly, the trend of the river runoff increase is still going on. Trends of river runoff of three different glacier-covered catchments exhibit distinctive results. This implies that retreating glaciers will reduce the ability to regulate the water circulation.

关键词： glacier change Kalik Mountain remote sensing runoff water resource.

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The westerly fluctuation and water vapor transport over the Qilian-Heihe valley

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Science China Earth Sciences 2004年第z1期47卷 32-38页

作者： WANG Keli CHENG Guodong XIAO Honglang JIANG Hao Cold and Arid Regions Environmental and Engineering Research Institute Chinese Academy of Sciences Lanzhou 730000 China Cold and Arid Regions Environmental and Engineering Research Institute Chinese Academy of Sciences Lanzhou 730000 China Cold and Arid Regions Environmental and Engineering Research Institute Chinese Academy of Sciences Lanzhou 730000 China Cold and Arid Regions Environmental and Engineering Research Institute Chinese Academy of Sciences Lanzhou 730000 China

The westerly fluctuation and the atmospheric water vapor transport over the Qilian-Heihe valley are analyzed and the results show that, in the water vapor transport stream field from Jun to September, this valley is in the westerly stream and the water vapor comes from westerlies water transport via the Black Sea and the Caspian Sea. The net water vapor transport is less net import and different from most areas of the northwest China. The interannual changes in water vapor transport over the valley arise from the westerly fluctuation, and have a positive relationship to the interannual changes in westerly wind speed. The cold air actions from the Mongol low pressure are the primary system that controls the westerly water vapor transport. Its action chain is that, the Mongol low pressure is strengthened → the circulation meridionality will be increased → the cold air will move southwards → the westerly will be stronger → the wind convergence of direction and speed will be stronger → the water vapor convergence transport will be increased → the local water vapor content will be increased. The interannual changes in atmospheric water vapor transport over the valley rely mainly on the convergence transport, but the effect of advection transport is less. The interannual changes of strong or weak westerly affect mainly the convergence transport, and then make the atmospheric water vapor net transport increase or decrease over the Qilian-Heihe valley.

关键词： waler vapor transport westerly fluctuation Qilian-Heihe valley northwest China water resource.

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