全球土地利用数据立方体(1992-2020年)_基于人类净初级生产力占用_数据集1
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本数据集为LUIcube的组成部分,以30弧秒(约1公里)空间分辨率提供1992至2020年全球土地利用动态信息,涵盖32种土地利用类型的面积变化、土地转换导致的净初级生产力变化(HANPPluc)、含损耗的收获净初级生产力(HANPPharv)以及收获后生态系统剩余净初级生产力(NPPeco)。数据层以年为单位存储,具体描述详见配套研究论文。 数据内容与单位 面积数据:以平方公里(km²/网格)表示各土地利用类型的分布面积。 NPP流量数据:以吨碳/年(tC/yr/网格)为单位,包含HANPPharv(收获量)、NPPeco(剩余量)及HANPPluc(土地转换影响量)。 关键计算关系: NPP实际量(NPPact)= NPPeco + HANPPharv NPP潜在量(NPPpot)= NPPact + HANPPluc 面积强度值:将NPP流量除以对应网格内土地利用类型面积,可转换为克碳/平方米/年(gC/m²/yr)。 HANPP占比:(HANPPharv + HANPPluc)/ NPPpot × 100%。 土地利用分类示例 数据集包含以下土地利用类型(部分示例): 未利用生产性荒野(WILD-core) 低强度零星利用的生产性荒野(WILD-periphery) 未利用非生产性荒野(WILD-nps) 针叶林为主林业用地(FO-con) 非针叶林为主林业用地(FO-ncon) 城市建成区与基础设施(BU-builtup)
This dataset is a component of LUIcube, providing global land use dynamics data from 1992 to 2020 with a spatial resolution of 30 arcseconds (approximately 1 km). It covers area changes of 32 land use types, net primary productivity changes induced by land conversion (HANPPluc), harvested net primary productivity with associated losses (HANPPharv), and post-harvest remaining net primary productivity of ecosystems (NPPeco). Data layers are stored annually, and detailed descriptions are available in the accompanying research paper. Data Content and Units Area data: The distributed area of each land use type is expressed in square kilometers (km² per grid cell). NPP flux data: Measured in tonnes of carbon per year (tC/yr per grid cell), including HANPPharv (harvested amount), NPPeco (post-harvest remaining amount), and HANPPluc (land conversion impact). Key Computational Relationships: Actual net primary productivity (NPPact) = NPPeco + HANPPharv Potential net primary productivity (NPPpot) = NPPact + HANPPluc Area intensity value: Dividing NPP flux by the area of the corresponding land use type within the grid cell can convert the unit to grams of carbon per square meter per year (gC/m²/yr). HANPP proportion: (HANPPharv + HANPPluc) / NPPpot × 100%. Land Use Classification Examples The dataset includes the following land use types (partial examples): - Unused productive wilderness (WILD-core) - Low-intensity sporadically utilized productive wilderness (WILD-periphery) - Unused non-productive wilderness (WILD-nps) - Coniferous forest-dominated forest land (FO-con) - Non-coniferous forest-dominated forest land (FO-ncon) - Urban built-up areas and infrastructure (BU-builtup)




