Global 15 x 15 Minute Grids of the Downscaled GDP Based on the SRES B2 Scenario, 1990 and 2025

The Global 15x15 Minute Grids of the Downscaled GDP Based on the Special Report on Emissions Scenarios (SRES) B2 Scenario, 1990 and 2025, are geospatial distributions of Gross Domestic Product (GDP) per unit area (GDP densities). These global grids were generated using the Country-level GDP and Downscaled Projections Based on the SRES B2 Scenario, 1990-2100 data set, and CIESIN's Gridded Population of World, Version 2 (GPWv2) data set as the base map. First, the GDP per capita was developed at a country-level for 1990 and 2025. Then the gridded GDP was developed within each country by applying the GDP per capita to each grid cell of the GPW, under the assumption that the GDP per capita was uniform within a country. This data set is produced and distributed by the Columbia University Center for International Earth Science Information Network (CIESIN).

基于《排放情景特别报告（Special Report on Emissions Scenarios，SRES）》B2情景、涵盖1990年与2025年的降尺度全球国内生产总值（Gross Domestic Product，GDP）15×15弧分网格数据，是单位面积国内生产总值（即GDP密度）的地理空间分布数据集。该全球网格数据集以《基于SRES B2情景的国家级GDP及降尺度预测（1990-2100）》数据集，以及国际地球科学信息网络中心（Center for International Earth Science Information Network，CIESIN）的《世界网格化人口第二版（Gridded Population of World, Version 2，GPWv2）》数据集作为底图生成。首先，研究团队以国家为行政单元核算了1990年与2025年的人均GDP数据；随后基于“一国之内人均GDP均匀分布”的假设，将人均GDP数据匹配至世界网格化人口数据集的每个网格单元，进而在各国范围内生成网格化GDP数据。本数据集由哥伦比亚大学国际地球科学信息网络中心（CIESIN）制作并公开发布。