蒙古国荒漠化分布数据集(2015年)  

A dataset of desertification distribution in Mongolia in 2015

作　　者：徐书兴 王卷乐[1,2,3] XU Shuxing;WANG Juanle(State Key Laboratory of Resources and Environmental Information System,Institute of Geographic Sciences and Natural Resources Research,Chinese Academy of Sciences,Beijing 100101,P.R.China;University of Chinese Academy of Sciences,Beijing 100049,P.R.China;Jiangsu Center for Collaborative Innovation in Geographical Information Resource Development and Application,Nanjing 210023,P.R.China)

机构地区：[1]中国科学院地理科学与资源研究所,资源与环境信息系统国家重点实验室,北京100101 [2]中国科学院大学,北京100049 [3]江苏省地理信息资源开发与利用协同创新中心,南京210023

出　　处：《中国科学数据（中英文网络版）》2023年第1期94-104,共11页China Scientific Data

基　　金：国家自然科学基金面上项目(41971385);中国工程科技知识中心建设项目(CKCEST-2022-1-41)。

摘　　要：荒漠化是全球最严重的生态环境和社会经济问题之一。蒙古国生态环境脆弱,土地退化严重,是全球荒漠化的热点地区。本研究基于Google Earth Engine平台,利用Landsat7遥感影像,选取归一化植被指数(NDVI)、地表反照率(Albedo)、改善型土壤调节植被指数(MSAVI)和表土粒度指数(TGSI)作为荒漠化判别指标,采用地理分区与荒漠化反演特征空间模型相结合的方法,完成蒙古国荒漠化信息精细反演,获得30 m空间分辨的2015年蒙古国荒漠化分布数据集。通过野外调查数据和高分辨率Google Earth影像验证本数据集的质量和精度,总体评价精度达到87.00%,Kappa系数为83.19%。本数据集直观反映蒙古国不同程度荒漠化土地的空间分布状况,可为蒙古国荒漠化防治重点区域的划定及修复策略的制定提供详实可靠的数据支持,对中蒙俄经济走廊的生态环境及绿色可持续发展具有重要意义。Desertification is one of the most serious eco-environmental and socio-economic problems in the world.Mongolia is a hot area of global desertification because of its fragile ecological environment and serious land degradation.In this study,based on Google Earth Engine platform,we selected Landsat7 remote sensing images,normalized vegetation index(NDVI),surface albedo(Albedo),improved soil adjusted vegetation index(MSAVI)and topsoil grain size index(TGSI)as desertification discrimination indexes,and combined the geographical division with desertification inversion characteristic space models to complete the fine inversion of Mongolian desertification information.In this way,we obtained a dataset of desertification distribution in Mongolia in 2015.The quality and accuracy of this dataset are verified by referring to field survey data and high-resolution Google Earth images.The overall evaluation accuracy is 87.00%and the Kappa coefficient is 83.19%.This dataset directly reflects the spatial distribution of different degrees of desertification in Mongolia,and can provide detailed and reliable data support for the delineation of key areas for desertification control and the formulation of restoration strategies in Mongolia.It is of great significance for the ecological environment and green and sustainable development of the China-Mongolia-Russia Economic Corridor.

关 键 词：蒙古国 荒漠化 地理分区 特征空间 荒漠化差值指数 

分 类 号：X171[环境科学与工程—环境科学]