The paleoclimatic environment reconstruction of Lop Nur in NW China in UAV spectroscopy

作     者：Lan YANG Tingting ZHANG Huaze GONG Yuyang GENG Guangjin TIAN Lan YANG;Tingting ZHANG;Huaze GONG;Yuyang GENG;Guangjin TIAN

作者机构：Laboratory of Target Microwave PropertiesDeqing Academy of Satellite ApplicationsHuzhou 313200China Aerospace Information Research InstituteChinese Academy of SciencesBeijing 100049China School of GovernmentBeijing Normal UniversityBeijing 100875China 

出 版 物：《Journal of Oceanology and Limnology》 (海洋湖沼学报（英文）)

年 卷 期：2023年第41卷第4期

页      面：1425-1443页

核心收录：

学科分类：0710[理学-生物学] 083002[工学-环境工程] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 070903[理学-古生物学与地层学(含：古人类学)] 081802[工学-地球探测与信息技术] 0709[理学-地质学] 07[理学] 0707[理学-海洋科学] 08[工学] 0818[工学-地质资源与地质工程] 081602[工学-摄影测量与遥感] 0816[工学-测绘科学与技术] 

基　　金：Supported by the National Natural Science Foundation of China(Nos.42071313,41571363) the Science and Technology Project for Black Soil Granary(No.XDA28080500) the Scientific Investigation of Natural and Cultural Heritage of Lop Nur Region(No.2014FY210500) 

主　　题：UAV remote sensing Lop Nur sparse spectral unmixing salt lake paleoclimate change 

摘      要：The change in the ecological environment in the arid core area is a critical issue in the context of global *** study the paleoclimate evolution,precise identification of minerals deposited in Asia’s arid hinterland,Lop Nur Salt Lake,NW China was *** hyperspectral data of the salt crust was sampled to identify the species and content of sedimentary minerals,and the multispectral photos were used to reconstruct the salt crust morphology using the unmanned aerial vehicles *** SUnSAL(sparse unmixing by variable splitting and augmented Lagrangian)method was employed to inverse the sedimentary mineral components along the *** heterogeneity of salt and clay minerals in bright and dark ear-shaped strips was *** paleoclimatic environment associated with salt lake extinction was reconstructed by analyzing paleoclimate records of sediments,spectral reflectance and morphology of the salt *** show that:(1)the variations in the micro-geomorphology of the salt crust are obviously the reason for the formation of bright and dark ear-shaped strips and the differences in the species and relative content of the sedimentary minerals are the microscopic *** high ratio of sedimentary salt minerals to clay minerals(RS/C)contributes to the high reflectivity,and the salt crust presents a bright *** low RS/C results in the low reflectivity,salt crust presents a dark texture;(2)the bright and dark ear-shaped strips represent warm-arid and cold-humid *** shape of the Lop Nur Lake shoreline evolved due to alternating warm-dry and cold-humid paleoclimate changes.