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

The Global 15x15 Minute Grids of the Downscaled Population Based on the Special Report on Emissions Scenarios (SRES) B2 Scenario, 1990 and 2025, are geospatial distributions of the downscaled population per Unit area (population densities). These global grids were generated using the Country-level Population 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. The 1990 GPW was used as the base distribution and the country-level downscaled projections were used to replace population estimates of 1990 in GPW and 2025. The fractional distribution of the population at each grid cell is the same as the 1990 GPW, sub-nationally. This data set is produced and distributed by the Columbia University Center for International Earth Science Information Network (CIESIN).

本数据集包含了基于《排放情景特别报告》（SRES）B2情景的全球15x15分钟网格下缩放人口数据，1990年和2025年的人口地理分布，具体为每单位面积下的人口密度分布。该全球网格数据是通过使用《基于SRES B2情景的1990-2100年国家层面人口及下缩放预测数据集》以及CIESIN的《世界网格化人口数据，第二版》（GPWv2）数据集构建的底图生成的。1990年的GPW数据作为基础分布，而国家层面的下缩放预测则用于替代GPW中的1990年人口估计，并预测2025年的人口。每个网格单元内的人口分布分数与1990年GPW的次国家级别分布保持一致。本数据集由哥伦比亚大学国际地球科学信息网络中心（CIESIN）制作与分发。