2015-2017年中巴公路沿线山地冰川表面运动数据集  

Dataset of glacier surface motion along KKH during 2015-2017

作　　者：王磊 蒋宗立 刘时银 张震 Wang Lei;Jiang Zongli;Liu Shiyin;Zhang Zhen(Hunan University of Science and Technology,Xiangtan 411201,P.R.China;Institute of International Rivers and Eco-security,Yunnan University,Kunming 650500,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)

机构地区：[1]湖南科技大学,资源环境与安全工程学院,湖南湘潭411201 [2]云南大学,国际河流与生态安全研究院,昆明650500 [3]中国科学院西北生态环境资源研究院,冰冻圈科学国家重点实验室,兰州730000

出　　处：《中国科学数据（中英文网络版）》2018年第4期68-77,共10页China Scientific Data

基　　金：国家自然科学基金项目(41471067,41474014,41701087,41761144075);科技部专项(2013FY111400)

摘　　要：中巴公路是一条连接中国西部与巴基斯坦及南亚、西亚的重要国际公路,对于沿线国家及高亚洲地区经济文化有着非常重要的意义。而公路沿线的帕米尔高原和喀喇昆仑山脉是全球山岳冰川分布最为密集的区域之一,冰川的运动时常对公路的安全运营造成威胁。本文获取了2014年10月至2018年3月间覆盖该区域(35°50′53″N–39°00′42″N,74°17′58″E–75°53′01″E)的Sentinel1A的SAR数据,使用特征匹配方法计算得到了中巴公路沿线冰川这3年间的表面运动场。得益于Sentinel1A数据的IW模式,计算结果的空间分辨率约为100 m×100 m,静止区域残余运动的统计分析表明总体精度约0.04 m/d。分析表明,中巴公路沿线北部和中部地区冰川表面流速相对较为稳定,而南部地区的大规模冰川流速较快,部分冰川积累区表面流速高达4 m/d以上。本数据集可作为高亚洲区域冰川物质平衡分析的基础数据,支撑高亚洲区域水资源状况评估以及气候变化方面的研究。另外,山地冰川表面运动场的高精度监测结果对中巴公路及沿线居民区进行冰川灾害的预警也有重要意义。As an international highway,the Karakoram Highway(KKH)is of great importance to both China and Pakistan.Crossing one of the most glacier-concentrated regions–the Karakoram Mountains,KKH constantly faces threats from glacier motions along the way.This study obtained the displacement field of glacier surface along the KKH during October 2014 and March 2018 by feature-tracking method,using Sentinel1A SAR data of the research area of the same period.Results indicated that glacier surface velocities in the northern and central parts of the region are relatively stable,while parts of the large-scale glaciers in the southern part had higher velocities up to 4 m/d,particularly along the section of the highway near Batura Sar.This dataset can be used as basic data in research of glacial mass balance,as well as of hydrological resource dynamics and climate changes.In addition,the high-precision monitoring results of the displacement field are of great significance for glacier disaster warnings to KKH and the residents around.

关 键 词：中巴公路 特征匹配方法 冰川表面运动 Sentinel1A 

分 类 号：P343.6[天文地球—水文科学] U418[天文地球—地球物理学]