500 m全球土地退化态势分布数据集（2000-2018）

全球土地退化态势分布数据集是在2000-2018年间全球净初级生产力（GLASS-NPP）产品和NPP气候响应速率（Moisture-responded NPP, MNPP）产品基础上，通过Sen Mann-Kendall趋势分析模型分析得到。该方法对2000年以来的NPP变化进行趋势检测分析（α=0.05），同时对同期MNPP和湿润指数（MI）进行相关分析（α=0.05）；在此基础上，确定了2000年以来全球土地退化扩展和加重以及土地改善和恢复的发生范围，并构建了全球土地退化态势分布数据集（500m）。该数据集覆盖全球除南极洲以外的陆地区域，空间分辨率为500m。存储为.tif格式，由16组（共计112个）数据文件组成，数据量为127 MB（压缩为1个文件，99.0 MB）。每组数据文件覆盖范围东西跨越45&deg，南北跨越65&deg。数据中，-1代表土地退化扩展和加重的区域， 1代表土地改善和恢复的区域，0代表未变化区域。基于该数据集的研究成果在2019年《全球生态环境遥感监测报告—全球土地退化态势》报告中。

Global Land Degradation Status Distribution Dataset was developed based on the Global Net Primary Productivity (GLASS-NPP) product and the Moisture-responded NPP (MNPP, climate response rate of NPP) product from 2000 to 2018, using the Sen-Mann-Kendall trend analysis model. This method performed trend detection and analysis on NPP variations since 2000 at a significance level of α=0.05, and conducted correlation analysis between MNPP and Moisture Index (MI) over the same period at α=0.05. On this basis, the scope of global land degradation expansion and aggravation, as well as land improvement and restoration since 2000, was identified, and the Global Land Degradation Status Distribution Dataset with 500m spatial resolution was constructed. This dataset covers all terrestrial regions globally except Antarctica, with a spatial resolution of 500 meters. It is stored in .tif format, consisting of 16 groups (totaling 112 individual data files), with a total size of 127 MB (compressed into a single file of 99.0 MB). Each group of data files covers a geographic extent spanning 45° in east-west longitude and 65° in north-south latitude. In this dataset, -1 denotes areas experiencing land degradation expansion and aggravation, 1 denotes areas undergoing land improvement and restoration, and 0 denotes unchanged areas. Research outcomes based on this dataset were included in the 2019 report titled *Global Remote Sensing Monitoring Report on Global Eco-Environment: Global Land Degradation Status*.

搜集汇总

背景与挑战

背景概述

该数据集是一个2000年至2018年全球土地退化态势的500米分辨率栅格数据集，基于GLASS-NPP和MNPP产品，通过Sen MK模型分析净初级生产力变化趋势和湿度响应，识别土地退化（-1）、改善（1）和无变化（0）区域，覆盖除南极洲外的全球陆地，数据量为127 MB，用于支持全球土地退化趋势的科学评估报告。