2000-2018年中西亚500mMODIS土地退化数据集

土地退化防治是该区域的生态安全和社会经济可持续发展的重要内容与根本保障。联合国和联合国防治荒漠化公约分别建议用NPP和NDVI来评估土地退化。在中西亚，目前发布的NPP产品中存在许多缺失值，难以精准评估土地退化。该产品覆盖范围涵盖中亚五国和西亚土耳其、阿富汗及伊朗全境，使用多指标综合评估法来监测中亚土地退化。该数据产品可用于替换联合国SDG15.3.1 提出的土地退化指数算法中的NPP或NDVI。本年度完成2000-2018年度产品。

Combating land degradation is a critical component and fundamental guarantee for the ecological security and socio-economic sustainable development of this region. The United Nations and the United Nations Convention to Combat Desertification (UNCCD) respectively recommend using Net Primary Productivity (NPP) and Normalized Difference Vegetation Index (NDVI) to assess land degradation. However, in Central and West Asia, the currently released NPP products contain numerous missing values, which makes it difficult to accurately assess land degradation. This data product covers the five Central Asian countries as well as the entire territories of Turkey, Afghanistan and Iran in West Asia, and adopts a comprehensive multi-index assessment method to monitor land degradation in Central Asia. It can be used to replace either NPP or NDVI in the land degradation index algorithm proposed by UN Sustainable Development Goal (SDG) 15.3.1. The 2000–2018 version of this data product was finalized in the current year.