珠峰绒布冰川1974-2000和2000-2016年冰储量变化数据集（V1.0)

这组数据是1974-2016年期间珠峰北坡绒布流域三条绒布冰川及表碛覆盖冰川三个时间段的年均冰储量变化数据集，采用ESRI 矢量多边形格式存储,是由三个阶段的DEM高程差数据DHPRISM2006-DEM1974（DH2006-1974）、DHSRTM2000-DEM1974（DH2000-1974）、DHASTER2016-SRTM2000（DH2016-2000），结合冰川覆盖专题矢量数据、冰密度 850 ± 60 kg m−3计算而来。DHPRISM2006-DEM1974, or DH2006-1974, 是2006年PRISM2006 数据和1974年DEM1974之间的高程差,即DH2006-1974 =PRISM2006 – DEM1974。PRISM2006是由2006年12月4日的光学立体像对遥感数据ALOS/PRISM生成。DEM1974是由我国早期1:50,000地形图生成的，这两期DEM都采用横轴墨卡托投影、Krasovsky1940椭球体。PRISM2006与DEM1974配准后，非冰川区高程数据精度为±0.24 m a-1。DHSRTM2000-DEM1974（DH2000-1974）是，2000年SRTM与DEM1974的高程差，两期DEM数据配准后，非冰川区高程数据精度为±0.03 m a-1。DHASTER2016-SRTM2000（DH2016-2000）是基于Brun et al. (2017) 发布的冰面高程差数据，采用与DH2006-1974、DH2000-1974一样的数据处理方法与处理过程而得到, 在非冰川区高程数据精度为±0.08 m a-1。表格中包括的数据项有：Shape_Area,冰川面积(m2)、Name冰川名,EC74_00表示1974-2000年间平均每条冰川每年的冰面高程变化（m a-1），EC00_16表示2000-2016年间冰川每年的冰面高程变化（m a-1），EC74_2006是1974-2006年间冰川年均冰面高程变化（m a-1），MB74_00表示1974-2000年间每条冰川年均冰川物质平衡数据（m w.e. a-1），MB00_16表示2000-2016年每条冰川年均冰川物质平衡数据（m w.e. a-1），MB74_2006表示1974-2006年每条冰川年均冰川物质平衡数据（m w.e. a-1），MC74_2000表示1974-2000年间每条冰川每年冰储量变化（m3 w.e. a-1），MC00_2016表示2000-2016年间每条冰川每年的冰储量变化（m3w.e. a-1），MC74_2006表示1974-2006年间每条冰川每年的冰储量变化（m3w.e. a-1）, Uncerty_EC,是每条冰川冰面高程变化的最大误差范围（m a-1）、Uncerty_MB,是每条冰川冰川物质平衡的最大误差（m w.e. a-1），Uncerty_MC, 是每条冰川冰储量变化的最大误差（m3w.e. a-1）。 MinUnty_EC，是每条冰川冰面高程变化的最小误差范围，MinUnty_MB，每条冰川冰川物质平衡的最小误差（m w.e. a-1），MinUnty_MC是每条冰川冰储量变化的最小误差（m3w.e. a-1）。该组数据可用于喜马拉雅山脉与高亚洲地区冰川变化、冰川消融水文水资源效应及其气候原因。

This dataset contains annual average ice mass change data for three Rongbuk glaciers and debris-covered glaciers in the Rongbuk Basin on the northern slope of Mount Qomolangma (Everest) across three periods from 1974 to 2016, stored in ESRI vector polygon format. It is derived from three phases of DEM elevation difference datasets: DHPRISM2006-DEM1974 (abbreviated as DH2006-1974), DHSRTM2000-DEM1974 (abbreviated as DH2000-1974), and DHASTER2016-SRTM2000 (abbreviated as DH2016-2000), combined with glacier coverage thematic vector data and an ice density of 850 ± 60 kg m⁻³.

DHPRISM2006-DEM1974 (DH2006-1974) refers to the elevation difference between the 2006 PRISM data and the 1974 DEM (DEM1974), i.e., DH2006-1974 = PRISM2006 – DEM1974. PRISM2006 was generated from the optical stereo pair remote sensing data ALOS/PRISM acquired on December 4, 2006. DEM1974 was produced from early Chinese 1:50,000 topographic maps. Both DEM datasets adopt the Transverse Mercator projection and the Krasovsky 1940 ellipsoid. After co-registration of PRISM2006 and DEM1974, the elevation data accuracy in non-glacial areas reaches ±0.24 m a⁻¹.

DHSRTM2000-DEM1974 (DH2000-1974) is the elevation difference between the 2000 SRTM DEM and DEM1974. After co-registration of the two DEM datasets, the elevation data accuracy in non-glacial areas is ±0.03 m a⁻¹.

DHASTER2016-SRTM2000 (DH2016-2000) is based on the ice surface elevation difference data published by Brun et al. (2017), and was obtained using the same data processing methods and workflows as DH2006-1974 and DH2000-1974, with an elevation data accuracy of ±0.08 m a⁻¹ in non-glacial areas.

The data items included in the dataset are as follows: Shape_Area (glacier area, m²), Name (glacier name), EC74_00 (average annual ice surface elevation change of each glacier from 1974 to 2000, m a⁻¹), EC00_16 (annual ice surface elevation change of each glacier from 2000 to 2016, m a⁻¹), EC74_2006 (average annual ice surface elevation change of each glacier from 1974 to 2006, m a⁻¹), MB74_00 (average annual glacier mass balance of each glacier from 1974 to 2000, m w.e. a⁻¹), MB00_16 (average annual glacier mass balance of each glacier from 2000 to 2016, m w.e. a⁻¹), MB74_2006 (average annual glacier mass balance of each glacier from 1974 to 2006, m w.e. a⁻¹), MC74_2000 (annual ice mass change of each glacier from 1974 to 2000, m³ w.e. a⁻¹), MC00_2016 (annual ice mass change of each glacier from 2000 to 2016, m³ w.e. a⁻¹), MC74_2006 (annual ice mass change of each glacier from 1974 to 2006, m³ w.e. a⁻¹), Uncerty_EC (maximum error range of ice surface elevation change for each glacier, m a⁻¹), Uncerty_MB (maximum error of glacier mass balance for each glacier, m w.e. a⁻¹), Uncerty_MC (maximum error of ice mass change for each glacier, m³ w.e. a⁻¹), MinUnty_EC (minimum error range of ice surface elevation change for each glacier), MinUnty_MB (minimum error of glacier mass balance for each glacier, m w.e. a⁻¹), MinUnty_MC (minimum error of ice mass change for each glacier, m³ w.e. a⁻¹). This dataset can be applied to studies on glacier changes, hydrological and water resource effects of glacier ablation, and their climatic drivers in the Himalayas and High Asia.

搜集汇总

背景与挑战

背景概述

该数据集记录了1974-2016年期间珠峰绒布冰川的冰储量变化情况，包含三个时间段的年均变化数据，适用于研究喜马拉雅山脉与高亚洲地区冰川变化及其气候影响。