1980-2014年岗日嘎布地区冰川高程变化数据集  

A dataset of glacier elevation changes in the Kangri Karpo Mountains during 1980–2014

作　　者：吴坤鹏 刘时银 蒋宗立 魏俊锋 Wu Kunpeng;Liu Shiyin;Jiang Zongli;Wei Junfeng(School of Resources and Environment,Anqing Normal University,Anqing 246133,P.R.China;Institute of International Rivers and Eco-Security,Yunnan University,Kunming 650091,P.R.China;State Key Laboratory of Cryospheric Sciences,Northwest Institute of Eco-Environment and Resources,Chinese Academy of Sciences,Lanzhou 730000,P.R.China;School of Resource Environment and Safety Engineering,Hunan University of Science and Technology,Xiangtan 411201,P.R.China)

机构地区：[1]安庆师范大学,资源环境学院,安徽安庆246133 [2]云南大学,国际河流与生态安全研究院,昆明650091 [3]中国科学院西北生态环境资源研究院,冰冻圈国家重点实验室,兰州730000 [4]湖南科技大学,资源环境与安全工程学院,湖南湘潭411201

出　　处：《中国科学数据（中英文网络版）》2018年第4期89-100,共12页China Scientific Data

基　　金：国家自然科学基金项目(41801031,41471067);科技部科技基础性工作专项项目(2013FY111400);云南大学人才引进项目(YJRC3201702);国际合作项目(131C11KYSB20160061-4)

摘　　要：由于印度洋季风的影响,位于藏东南的岗日嘎布是青藏高原最湿润的地区,海洋性冰川在该地区集中发育。该地区的冰川物质损失对海平面上升、调节河川径流及冰湖溃决灾害等有重要影响。本文基于1980年航测地形图、2000年2月11–22日SRTM数字高程模型(DEM)和2014年的X波段TerraSAR/TanDEM雷达影像得到岗日嘎布地区冰川高程变化。大致空间范围在29°N–30°N、96°E–98°E内,包括帕隆藏布以南、贡日嘎布曲以北区域,覆盖面积达3600平方公里。数据集内包含两类文件:1)基于TerraSAR/TanDEM雷达影像获取的2014年数字高程模型数据;2)基于地形图、SRTM和TerraSAR/TanDEM雷达影像获取的1980–2014年冰川高程变化栅格数据。为克服岗日嘎布地区多云雨对光学遥感影像的影响,对大地测量法中数字高程模型及冰川高程变化的提取采用合成孔径雷达差分干涉测量(DInSAR)。与ICESat-GLAS数据相比较,2014年数字高程模型的垂直精度达到2.65 m。利用DInSAR获取的冰川高程变化转化为物质平衡,与野外测量获取的冰川物质平衡有较好的一致性。本数据集为目前岗日嘎布地区最新的高程变化数据,有效减少了云、季节性冰雪的影响,可作为基础数据集,应用到各种冰川研究中。Due to the influence of the Indian monsoon,the Kangri Karpo Mountains,located in southeast Tibet,is the most humid and maritime glacier-concentrated region on the Tibetan Plateau.Glacier mass loss in Kangri Karpo importantly contributes to the rise of global mean sea level,the adjustment of run-off distribution,and the increase of glacial lake outburst floods(GLOFs).Based on topographic maps(1980),SRTM(2000),and TerraSAR-X/TanDEM-X(2014),the study obtained the latest glacier elevation changes on the Kangri Karpo Mountains.Within a spatial extent of 29°N^30°N,96°E^98°E totaling an area of 3600 km2,the Mountains cover the region south of the Purlung Tsangpo River and north of the Gongri–Gabo River.The dataset consists of two subsets:①2014 digital elevation model(DEM)data obtained from TerraSAR-X/TanDEM-X,and②raster data of glacier elevation changes during 1980–2014 based on topographic maps,SRTM and TerraSAR-X/TanDEM-X acquisitions.To mitigate influences of cloud cover on optical images,Differential Interferometric Synthetic Aperture Radar(DInSAR)was used to extract DEM data and acquire glacier elevation changes.Compared with ICESat-GLAS,the vertical precision of TerraSAR/TanDEM DEM reached 2.65 m.Glacier mass balance resulting from glacier elevation changes showed a high consistency with field measurements.The dataset records the latest glacier elevation changes in the Kangri Karpo Mountains,with minimum influences of cloud and seasonal snow cover on the glacier maps.It can be used as a fundamental dataset in future glacier-related studies.

关 键 词：数字高程模型 冰川高程变化 岗日嘎布 DINSAR TerraSAR/TanDEM 

分 类 号：P343.6[天文地球—水文科学]