1991年和2015年唐古拉山冰川边界/范围矢量数据集

A dataset of glacier boundary in the Tanggula Mountains in 1991 and 2015

唐古拉山(31°15′–34°45′N,90°23′–95°52′E)位于青藏高原中部,西起祖尔肯乌拉山,东至布加岗日,全长约500 km。山脉总体呈西北–东南走向,是青海省与西藏自治区的界山及怒江河源水系和长江–澜沧江河源水系的分水岭。唐古拉山平均海拔5500 m左右,总地势西部高、东部低。唐古拉山脉东段冰川属于海洋型冰川,西段属于大陆型冰川,长江正源各拉丹东冰川区、怒江正源将美尔山冰川区及澜沧江正源皆位于唐古拉山地区,因此本区域冰川变化对以上河流水资源起着至关重要的作用。本数据集基于第一、二次冰川编目数据、1989–1995年Landsat TM遥感影像、2013–2017年Landsat OLI遥感影像以及SRTM DEM数据,提取1991年和2015年唐古拉山冰川矢量数据,并标明了冰川编码、名称和流域等相关信息。本数据集反映了1991年(两次冰川编目之间)和2015年唐古拉山冰川分布状况,可作为该区域冰川变化、气候变化等研究的基础数据。

Located in the central part of the Qinghai-Tibet Plateau(31°15′–34°45′N,90°23′–95°52′E),Tanggula Mountains are bordered by the Zulkkora Mountains to the west and by the Bu’gyai Kangri to the east,stretching about 500 km from NW to SE.They form the boundary between Qinghai Province and the Tibet Autonomous Region and serve as the watershed of the Nujiang and Yangtze-Lantsang Rivers.The average elevation of the Tanggula Mountains is about 5500 m,and the terrain is high in the west and low in the east.The glaciers located in the eastern section of the mountains are temperate-glaciers and in the western section are cold-glaciers.The Yangtze River,Nu River and Lantsang River all originate from the Tanggula Mountains.Therefore,glacier changes in the region play a crucial role in the water resources of the above rivers.Based on the First Chinese Glacier Inventory and the Second Chinese Glacier Inventory,Landsat TM images from 1989 to 1995,Landsat OLI images from 2013 to 2017 and the Shuttle Radar Topography Mission(SRTM)DEM data,we extracted the glacier vector data of Tanggula Mountains in 1991 and 2015 with glacier coding,name and basin et al.labeled in the attribute table.The dataset presents the glacier conditions in 1991(between the two Chinese glacier inventories)and 2015,which can be used as the basic data for research on glacier change and climate change in this region.