首页 >  2007, Vol. 11, Issue (4) : 1993-2002

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DOI:

10.11834/jrs.20070471

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2006-05-22

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近30年来喜马拉雅山脉西段纳木那尼峰地区冰川变化的遥感监测研究
1.中国科学院青藏高原研究所,北京 100085;2.中国科学院遥感应用研究所,遥感科学国家重点实验室,北京 100101;3.中国科学院冰冻圈科学国家重点实验室,甘肃 兰州 730000100101;4.中国科学院地理科学与资源研究所,北京 100101;5.中国科学院青藏高原研究所,北京100085;6.中国科学院冰冻圈科学国家重点实验室,甘肃 兰州 730000
摘要:

本文从1976,1990,1999的Landsat及2003年ASTER系列数字遥感影像上提取了喜马拉雅山脉西段纳木那尼峰地区的4期冰川空间分布数据,在Arc/Info中综合各期数据,建立研究区1976—2003年冰川变化图谱,定量分析了纳木那尼峰地区冰川的空间变化。图谱这种数据集成的方法明显优于直接将各期影像分类结果进行比较的传统研究方法。研究结果表明,纳木那尼峰地区的冰川以广泛退缩为主,但北部也有少量前进冰川存在。自1976年到2003年,冰川面积从84.41km2减少到77.29km2,各时段分别以平均0.17km/a,0.19km/a和0.77km/a的速度在退缩,冰川退缩明显加速。冰川退缩面积占研究区总面积的8.4%,明显比高亚洲冰川平均退缩比例(7%)大,表明西喜马拉雅山脉的冰川退缩比较严重。

Tupu of Glacier Variations in the Mt.Naimona''''Nyi Region,Western Himalayas,in the Last Three Decades
Abstract:

This paper provides an alternative method of comprehensive research on glacier variation using multi-source andmulti-temporal data. Thiswork quantifies glacier variations of theMt. Nami ona’Nyi area by integrating glacier spatial data from ASTER and the Landsat series of satellite miagery at four different tmi es: 1976, 1990, 1999, and 2003. Comparison of the results from individual mi ages with those from the Tupu method indicates that the Tupu approach provides a better result in the research. Glacier variations were mapped and analyzed; discrepancies between miages could be detected and removed from the integrated Grid data using remap tables in Arc/Info GRID module both graphically and numerically. Our results show that glaciers in the region both retreated and advanced during the last 28 years; however, retreat dominates and\nincreaseswith tmie.The variation ofglaciers in thewesternHmi alayan region is dramatic compared with other regions in high Asia. From 1976 to 2003, glacier area decreased from 84·41km2to 77·29km2. By the sequential mi ages,it shows that glacier areas shrank by 0·17km2a-1, 0·19km2a-1,and 0·77 km2a-1,on average,during the periods1976—1990, 1990—1999,and 1999—2003, respectively,suggesting thatglacier retreat has accelerated. The retreatwasmost likely due to the negative glacialmassbalance andwas affected by rising temperature and decreasing precipitation in the region over theTibetan Plateau.

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