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| 1 | 基于TerraSAR/TanDEM-X监测岗日嘎布山脉东南段冰川冰面高程变化(2000—2014)显示文摘岗日嘎布山区是海洋型山地冰川集中发育地区之一。海洋型冰川对气候变化敏感,藏东南多云雨天气使可用光学遥感影像数据少,限制了该地冰川变化遥感监测研究,雷达数据的应用为解决这一问题提供了有效途径。基于2000年SRTM DEM与2014年TerraSAR/TanDEM-X雷达数据,采用差分干涉测量(D-InSAR)方法,研究岗日嘎布山区东南段冰面高程变化及冰储量变化特征,得出如下结论:(1)研究区2000—2014年冰储量变化为-1.69±0.12 Gt,冰面高程年均变化为-0.86±0.13 m·a^(-1)。(2)冰面高程变化整体与海拔高度呈正相关(皮尔森系数为0.93)。在3700~3900 m,随海拔升高冰面高程变化加剧;在3900—5800 m,冰面高程变化逐渐趋于零;在5800 m以上高海拔积累区,冰面高程变化为正值。(3)表碛覆盖冰川消融较快。表碛覆盖冰川区冰面高程变化为-1.71 m·a^(-1),裸冰区为-0.73 m·a^(-1)。(4)结合波密、察隅和左贡站年均温与年降水变化可知,2000—2014年研究区年均温显著升高,年降水变化不明显,冰川快速消融是区域气温升高所致。本文可为青藏高原冰川时空变化研究提供基础数据支持。 | 姬鑫慧 叶庆华 聂维 陈益民 NAUMAN Ali | 2021 | 山地学报2021，39，5： | 1 |
| 2 | Elevation change of the Urumqi Glacier No.1 derived from Sentinel-1A data显示文摘Accurate measurements of glacier elevation changes play a crucial role in various glaciological studies related to glacier dynamics and mass balance. In this paper, glacier elevation changes of Urumqi Glacier No.1 between August 2015 and August 2017 were investigated using Sentinel-1 A data and DInSAR technology. Meanwhile, the atmospheric delay error was corrected with the MODIS MOD05L2 products. The weight selection iteration method was applied to calibrate the glacier elevation changes in the mass balance years 2015-2016 and 2016-2017. Finally, the geodetic method was employed to calculate the elevation change values of individual stakes of Urumqi Glacier No.1. Moreover, the elevation change values corrected by the weight selection iteration method were verified. Results showed as follows:(1) the elevation of Urumqi Glacier No.1 glacier affected by atmospheric delay was 1.270 cm from 2015 to 2016. The glacier elevation affected by atmospheric delay from 2016 to 2017 was 1.071 cm.(2) The elevation change value of Urumqi Glacier No.1 was-1.101 m from 2015 to 2016, and the elevation of Urumqi Glacier No.1 decreased by 1.299 m from 2016 to 2017. The overall thickness of Urumqi Glacier No. 1 was thinning.(3) By comparing the elevation change results of individual stakes with corresponding points corrected by the weight selection iteration method, the mean squared errors of difference were 0.343 m and 0.280 m between the two mass balance years, respectively.(4) The accuracy of elevation change in non-glaciated areas was 0.039 m from 2015 to 2016 and 0.034 m from 2016 to 2017. Therefore, it is reliable to use Sentinel-1 A data and the study method proposed in this paper to calculate the elevation change of mountain glaciers with very low horizontal movement. | LIU Jia-liang ZHAO Jun LI Zhong-qin WANG Yan-qiang SHEN Si-min | 2021 | Journal of Mountain Science2021，18，10： | 0 |
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