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国家自然科学基金(41001040)

作品数:2 被引量:32H指数:2
相关作者:陈辉李忠勤周平王璞玉金爽更多>>
相关机构:西北师范大学中国科学院更多>>
发文基金:国家自然科学基金国家自然科学基金创新研究群体项目国家重点基础研究发展计划更多>>
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Ice Surface-Elevation Change and Velocity of Qingbingtan Glacier No.72 in the Tomor Region,Tianshan Mountains,Central Asia被引量:8
2011年
Glaciers in the Tomor region of Tianshan Mountains preserve vital water resources. However, these glaciers suffer from strong mass losses in the recent years because of global warming. From 2008 to 2009, a large-scale scientific expedition has been carried out in this region. As an individual reference glacier, the tongue area of Qingbingtan glacier No. 72 was measured by the high precise Real Time Kinematic-Global Position System (RTK-GPS). In this paper, changes of the tongue area of Qingbingtan glacier No.72 has been studied based on topographic map, remote sensing image and the survey during 2008-2009 field campaign. Results indicated that the ice surface-elevation of the tongue area changed - 0.22~0.14 m a-1 from 1964 to 2008. The estimated loss in ice volume was 0.0144-0.009 km3, which represented a ~20 % decrease from the 1964 volume and was equivalent to average annual mass balance of -0.204-0.12 m water equivalent for the tongue area during 1964-2oo8. Terminus retreated by 1852 m, approximately 41 m a-1, with the area reduction of 1.533 km2 (0.034 km2 a-0 from 1964 to 2009. Furthermore, the annual velocity reached to -70 m a-1. Comparing with the other monitored glaciers in the eastern Tianshan Mountains, Qingbingtan glacier No.72 experienced more intensive in shrinkage, which resulted from the combined effects of climate change and glacier dynamic, providing evidence of the response to climatic warming.
WANG PuyuLI ZhongqinLI HuilinWANG WenbinWANG Feiteng
近年来祁连山中段冰川变化被引量:24
2013年
基于遥感和实测的方法,对近50 a来祁连山中段,包括黑河流域和北大河流域的冰川变化特征进行了分析。研究表明:1956—2003年,祁连山中段所研究的910条冰川面积共缩小了21.7%。其中,黑河流域冰川面积缩小了29.6%,北大河流域冰川面积缩小了18.7%。小冰川面积变化较大冰川要大,其对气候变化的敏感性较强。由于祁连山中段东西跨度较大,气候和地形等因素的不同,直接造成了冰川变化的区域差异。近期野外考察发现,位于黑河上游的葫芦沟流域,1956—2010年冰川面积缩小了30.1%,近7 a冰川面积缩小的比率达到前期的近5倍,且其中的十一冰川由于消融严重,已经完全分离成2条独立的冰川。雪冰融水径流是该流域中重要的水源,在稳定河川径流、调节其年际变化和年内分配方面发挥着重要作用。
陈辉李忠勤王璞玉周平金爽
关键词:遥感方法冰川面积祁连山中段
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