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近40年来天山东段冰川变化及其对气候的响应
  • ISSN号:1000-6060
  • 期刊名称:《干旱区地理》
  • 时间:0
  • 分类:P343.6[天文地球—水文科学;天文地球—地球物理学]
  • 作者机构:[1]中国科学院寒区旱区环境与工程研究所冰冻圈科学国家重点实验室,甘肃兰州730000
  • 相关基金:国家自然科学基金项目(90411003和40121101);中科院知识创新工程重要方向项目(KZCX3-SW-344);中科院百人计划项目共同资助.
中文摘要:

利用经1959/1961年航片校正的地形图、1972年航片和1992年TM、2001年ETM+遥感影像,通过遥感图像处理和人工目视解译,分析了天山东段哈尔里克山区1959/1961-2001年的冰川变化。结果表明,1959/1961-2001年冰川面积和储量减少量分别占1959/1961年的11.4%和12.3%。其中,20世纪50年代末到70年代初,冰川退缩幅度大,冰川面积和储量年减少率分别约为0.51%和0.508%,20世纪70年代初到90年代初,退缩大幅减缓,冰川面积和储量年减少率为0.1%和0.13%,90年代以后退缩速度又有加剧趋势,冰川面积和储量年减少率增加到0.31%和0.34%。对流域气象站气候资料分析发现,1959/1961-1972年的冰川面积减少率大,主要与1959-1966年时段气温偏高、而降水偏少有关。升温幅度的增大是影响20世纪90年代初以来研究区冰川退缩加剧的根本原因。

英文摘要:

Mountain glaciers are one of potential climate indicators because they are sensitive to climate changes Glacier area and volume variations in the Karlik Mountain, the eastern Tianshan Mountains, from 1959/1961 to 2001 were analyzed in this paper. The topographic maps of 1 : 100 000 scales in 1959/1961, 1972 aerial photographs and satellite images (Landsat TM and ETM + ) from 1992 and 2001 was used to map the surface area of glaciers and in this region through a process of manual digitizing on a false color composite of bands 5, 4, 3 ( red, green, blue). Glacier volumes were calculated using the experience formula developed by Liu and others, based on the relation between glacier area and volume. The results indicate that the glacier area and volume over the Karlik Mountain shrunk by 11.4% and 12.3%, respectively, in the last 40 years. The rate of the glacier area decrease was 0.51% ·a^-1 over the interval 1959/1961 - 1972,and decreased to 0.1% ·a^-1 between 1972 and 1992, but increased by about three times (0.31% ·a^-1 ) from 1992 to 2001, which indicated accelerated glacier retreat in recent decades. In the same way, the volume of the Karlik mountain glaciers was reduced with the rates of 0.508% ·a^-1 from 1959/1961 to1972, 0.13% ·a^-1 during 1972 -1992, and 0.34% ·a^-1 from 1992 to 2001, respectively. Glacier changes in the eastern Tianshan Mountains have a significant response to increasing summer temperatures. Analysis of the climate records of over the last 40 years from the Yiwu meteorological station also showed a precipitation rise in winter and summer from 1959, but these could not compensate for the mass loss due to ablation. The large shrinkage of Karlik mountain glaciers from 1959/1961 to 1972 can be attributed to the warm and dry climatic events during 1959 -1966. The sharp increase in summer air temperature resulted in the accelerated glacier recession in this region since the 1990s.

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期刊信息
  • 《干旱区地理》
  • 北大核心期刊(2011版)
  • 主管单位:中国科学院出版委
  • 主办单位:中国科学院新疆生态与地理研究所 新疆地理学会
  • 主编:陈曦
  • 地址:乌鲁木齐北京南路818号
  • 邮编:830011
  • 邮箱:aridlg@ms.xjb.ac.cn
  • 电话:0991-7885506
  • 国际标准刊号:ISSN:1000-6060
  • 国内统一刊号:ISSN:65-1103/X
  • 邮发代号:58-45
  • 获奖情况:
  • 1994-1996、1997-1999年度科技期刊质量评比优秀期...,1999-2000年度科技期刊质量评比优秀期刊二等奖
  • 国内外数据库收录:
  • 英国农业与生物科学研究中心文摘,日本日本科学技术振兴机构数据库,中国中国科技核心期刊,中国北大核心期刊(2004版),中国北大核心期刊(2008版),中国北大核心期刊(2011版),中国北大核心期刊(2014版),中国北大核心期刊(2000版)
  • 被引量:18207