African Climate Mobility Initiative (ACMI): Internal Migration Projections

The Africa Climate Mobility Initiative (ACMI) Internal Migration Projections project internal migration flows at 5-year intervals from 2020 to 2050 for a combination of 2 sets of Shared Socioeconomic Pathways (SSPs) scenarios and 3 sets of Representative Concentration Pathways (RCPs) scenarios. The unit of analysis is 7.5 arc-minutes, covering the entire African continent (approximately 15 km at the equator). These grid cells are drawn using a vector representation, and not a tessellation of grid cells (rasters). While the calibration and projection took place at a grid cell resolution of 2.5 arc-minutes, these data have been aggregated to a 7.5 arc-minute resolution. These data underpin the African Shifts Report, produced by the ACMI and enabled by the Global Centre for Climate Mobility (GCCM). The ACMI was launched in September 2021 as a joint initiative of the GCCM, the African Union Commission (AUC), the United Nations System (UN), and the World Bank.

本数据集为非洲气候流动倡议（Africa Climate Mobility Initiative, ACMI）国内人口迁移预测项目的产出数据，针对2套共享社会经济路径（Shared Socioeconomic Pathways, SSPs）与3套典型浓度路径（Representative Concentration Pathways, RCPs）的组合情景，生成了2020年至2050年每5年间隔的国内人口迁移流动数据。其分析单元为7.5弧分，覆盖整个非洲大陆（赤道处分辨率约为15公里）。本数据集采用矢量形式表征这些网格单元，而非采用栅格网格镶嵌形式。尽管校准与预测推演过程曾采用2.5弧分的网格分辨率，但本数据已被聚合至7.5弧分的分辨率。本数据为ACMI编制、全球气候流动中心（Global Centre for Climate Mobility, GCCM）支持完成的《非洲变迁报告》提供了核心支撑。ACMI于2021年9月启动，是由全球气候流动中心、非洲联盟委员会（African Union Commission, AUC）、联合国系统（United Nations System, UN）及世界银行联合发起的合作倡议。