globalchange  > 气候变化事实与影响
CSCD记录号: CSCD:6142163
论文题名:
2009年慕士塔格峰山地冰川表面冬季运动分布数据集
其他题名: A dataset of glacier surface motion distribution in Muztagh Ata region during winter 2009
作者: 闫世勇1; 李毅1; 吕明阳2; 阮智星3
刊名: 中国科学数据
ISSN: 2096-2223
出版年: 2017
卷: 2, 期:2, 页码:46-52
语种: 中文
中文关键词: 冰川表面运动 ; 像素跟踪算法 ; 慕士塔格峰
英文关键词: ALOS/PALSAR ; glacier surface motion ; pixel-tracking ; ALOS/PALSAR ; Muztagh Ata
WOS学科分类: MULTIDISCIPLINARY SCIENCES
WOS研究方向: Science & Technology - Other Topics
中文摘要: 慕士塔格峰位于帕米尔高原西部,是我国西部山地冰川的集中分布区之一,长期监测该地区冰川不仅有益于评估水资源状况,也有助于气候变化方面的研究。本文基于日本ALOS/PALSAR卫星分别于2009年1月14日和3月1日获取覆盖慕士塔格峰地区(37°48′18N ~ 38°35′14N,74°42′45E ~ 75°41′50E)的SAR数据,借助改进的像素跟踪算法,通过精确去除卫星轨道和传感器姿态差异带来的全局性位移和地形起伏导致的地形效应误差,得到了该地区山地冰川表面高精度运动分布场(GeoTIFF格式,32位浮点型)。其空间分辨率约为20 m。非冰川区残余运动的统计分析表明其总体精度约为0.5 m/46 day。冰川运动分布表明,该地区冰川运动主要呈现为积累区速度快,消融区和末端运动速度慢的特点,冰川运动整体上与地形存在一定的相关性,其中个别中小型冰川呈现出较强的活动性。本数据集可以作为该地区山地冰川运动的本底调查资料,为慕士塔格峰地区山地冰川运动研究提供基础数据支撑。另外,山地冰川运动高精度监测将有助于研究其动力学特征和预测冰川运动导致的地质灾害,同时也为我国冰川资源普查提供了一种有效途径。
英文摘要: Muztagh Ata region is one of the glacier concentrated areas in eastern Pamir, China. Long-term monitoring of glaciers over the region is not only helpful for water resource investigation, but also benefits research on climate change. Based on the SAR imagery of the region (37°48′18N-38°35′14N, 74°42′45E-75°41′50E) acquired by ALOS/PALSAR in January 14 and March 1, 2009, we used an improved pixel-tracking algorithm to extract the distribution of ice surface motion. Accurate data of ice motion (GeoTiff format in 32-bit floating point) was obtained by precisely removing the global deformation caused by orbit and sensor attitude, as well as the topographic effect caused by complex terrain. Final results have a spatial resolution of about 20 m. A statistical analysis of the residual movement in the non-glacial area indicates that the results have an overall accuracy of about 0.5 m/46 day. The results demonstrate that the flow velocity in the accumulation part is generally faster than that in the ablation or terminal part. The ice motion has a relatively positive correlation with topography and some small glaciers show strong activities. The dataset can serve as the basis for investigating the mountain glacier movement in this region, providing statistical support for relevant research. In addition, the accurate monitoring of mountain glacier motion is propitious to both glacier dynamic study and ice flow-related disaster prediction. Meanwhile, it provides an effective way for glacier investigation in China.
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/153471
Appears in Collections:气候变化事实与影响

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作者单位: 1.(徐州)中国矿业大学,环境与测绘学院, 徐州, 江苏 221116, 中国
2.南京大学,地球科学与工程学院, 南京, 江苏 210023, 中国
3.中国科学院遥感与数字地球研究所, 北京 100094, 中国

Recommended Citation:
闫世勇,李毅,吕明阳,等. 2009年慕士塔格峰山地冰川表面冬季运动分布数据集[J]. 中国科学数据,2017-01-01,2(2):46-52
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