A global land-use data cube 1992-2020 based on the Human Appropriation of Net Primary Production: Dataset 11

This dataset is part of the LUIcube, a global dataset on land-use at 30 arcsecond spatial resolution. The LUIcube includes information on area, the change in NPP due to land conversions (HANPPluc), the harvested NPP (including losses, HANPPharv), and the NPP remaining in ecosystems after harvest (NPPeco) for 32 land-use classes in annual time-steps from 1992 to 2020. A detailed description of the LUIcube is available in the accompanying publication. The layers of land-use areas are provided in square kilometers (km²) per grid cell. All NPP flows are provided in tC/yr per grid cell. Adding HANPPharv to NPPeco results in the actual NPP available before harvest (NPPact=NPPeco+HANPPharv), and adding HANPPluc to NPPact results in the potential NPP available in the hypothetical absence of land use (NPPpot=NPPact+HANPPluc) for the given land-use class. Area-intensive values (in gC/m²/yr) can be calculated by dividing the NPP flows by the area of the respective land-use class per grid cell. HANPP in % of NPPpot can be calculated by summing up HANPPharv and HANPPluc and dividing it by NPPpot. Areas and NPP flows of land-use classes can be aggregated to calculate their overall HANPP. This Zenodo repository provides data on following land-use classes: total grazing land area (GL-total)本数据集隶属于LUIcube数据集——一套空间分辨率为30角秒的全球土地利用数据集。LUIcube涵盖了1992年至2020年逐年时间步下32类土地利用类型的相关信息，包括各类土地的面积、土地利用转换引起的净初级生产力（Net Primary Productivity, NPP）变化量（HANPPluc）、收获型净初级生产力（含损耗，HANPPharv），以及收获后生态系统中留存的净初级生产力（NPPeco）。LUIcube的详细说明可参见配套发表文献。 土地利用面积图层以每网格单元的平方千米（km²）为单位提供。所有NPP通量均以每网格单元每年吨碳（tC/yr）为单位给出。将HANPPharv与NPPeco相加，即可得到收获前的实际可用净初级生产力（NPPact = NPPeco + HANPPharv）；在此基础上再加上HANPPluc，则可得到假设不存在该类土地利用时的潜在可用净初级生产力（NPPpot = NPPact + HANPPluc）。单位面积强度值（单位为gC/m²/yr）可通过将NPP通量除以对应网格单元内该类土地利用的面积得到。以NPPpot百分比表示的人类占用净初级生产力（HANPP），可通过将HANPPharv与HANPPluc求和后除以NPPpot计算得出。各类土地利用类型的面积与NPP通量可进行聚合运算，以得到其总人类占用净初级生产力。 本Zenodo仓库提供了以下土地利用类别的数据：总放牧地面积（GL-total）