A global land-use data cube 1992-2020 based on the Human Appropriation of Net Primary Production: Dataset 10

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: 1. total forestry area (FO-total in HANPPharv.zip, NPPeco.zip, area.zip; HANPPluc is zero for forestry) including coniferous and non-coniferous forestry; total wilderness areas (WILD-total) including unused productive wilderness areas, productive wilderness areas that are sporadically used at very low intensity, and unused unproductive wilderness areas本数据集隶属于LUIcube——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年逐年时间步长下32类土地利用类型的相关信息，包括地块面积、土地利用变化引发的净初级生产力（Net Primary Productivity，NPP）变动量（HANPPluc）、收获的净初级生产力（含损耗，HANPPharv）以及收获后生态系统留存的净初级生产力（NPPeco）。LUIcube的详细说明可参阅配套发表的学术文献。 土地利用面积图层以每网格单元的平方千米（km²）为单位给出。所有净初级生产力通量均以每网格单元吨碳每年（tC/yr）为单位。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）；若再将HANPPluc加入NPPact，则可得到假设无土地利用情况下的潜在可用净初级生产力（NPPpot = NPPact + HANPPluc），该值对应给定土地利用类型。单位面积强度值（单位：克碳每平方米每年，gC/m²/yr）可通过将净初级生产力通量除以对应网格单元内各土地利用类型的面积计算得到。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得到。土地利用类型的面积与净初级生产力通量可通过聚合计算得到其总HANPP。 本Zenodo仓库提供以下土地利用类型的数据： 1. 林业总规模（FO-total，对应HANPPharv.zip、NPPeco.zip与area.zip文件；林业的HANPPluc为0），涵盖针叶林与非针叶林；未利用与低强度使用荒野总规模（WILD-total），包含未利用的生产性荒野、极低强度零星使用的生产性荒野以及未利用的非生产性荒野。