Extracting the spatio-temporal evolution and geographical features of shrinking Gongga Mountain glacier group during 1989-2017

扫码查看

原文链接

NETL
NSTL
Elsevier

外文摘要：The climate-induced spatio-temporal evolutionary characteristics of glaciers have a strong response in understanding the surface earth system processes, including hydrology, ecology, and topography. With use of multispectral remote sensing, this study explores the longtime glacier shrinkage evolution and their geographical features of Gongga Mountain glaciers (i.e. Gongga Mountain glacier group), in eastern Qinghai-Tibetan Plateau, China. We used a band ratio and decision-tree classification mixed method to automatically delineate Gongga Mountain glaciers shrinking nature. Based on the multispectral Landsat images over nearly 30 years, the long-time spatio-temporal shrinkage evolution of Gongga Mountain glaciers was extracted, in which the glacier shrinkage area changes are consistent with the results from previous works. This study analyzed the nature of shrinking glaciers with topographic derivatives (i.e., different glacier scale, altitude, slope gradient, and slope direction). We noticed that the characteristic of shirking glaciers is associated with the topographic variables. The maximum shrinkage was concentrated at altitudes of 5000-5500 m, and a slope angle of 30° in the south direction. Findings shed light that glaciers in our study area are correlated with temperature changes and precipitation with a correlation coefficient of -0.97 and 0.35, respectively, suggesting that the decreasing glaciers are highly correlated with the temperature increase. This study implies the usefulness of remote sensing in understanding the long-time ecological environment change and helping manage the potential glacial disasters in eastern Qinghai-Tibet Plateau.

外文关键词：

Glacier evolutionGongga MountainMultispectral remote sensingClimate change

作者：

Xianlin Shi、Keren Dai、Jin Deng、Dingjie Zhong、Guoxiang Liu、Saied Pirasteh、Bo Zhang、Yunus P. Ali、Yan He、Rubing Liang

展开 >

作者单位：

College of Earth Sciences, Chengdu University of Technology, Chengdu 610059, China

College of Earth Sciences, Chengdu University of Technology, Chengdu 610059, China, State Key Laboratory of Geohazard Prevention and Geoenviroment Protection, Chengdu University of Technology, Chengdu 610059, China

The Faculty of Geography Resource Sciences, Sichuan Normal University, Chengdu 610068 China

Faculty of Geosciences and Environmental Engineering, Southwest Jiaotong University, Chengdu 611756, China

State Key Laboratory of Geohazard Prevention and Geoenviroment Protection, Chengdu University of Technology, Chengdu 610059, China

展开 >

出版年：

2021

DOI：

10.1016/j.asr.2021.04.013

Advances in space research: The official journal of the Committee on Space Research

EISCI

ISSN：0273-1177

年,卷(期)：2021.68(4)

被引量1
参考文献量44