全球5千米不透水面扩张及其陆地碳排放数据集（1993-2018年）

数据集包括三套，分别为全球不透水面扩张数据、不透水面扩张导致的陆地碳排放上限数据以及不透水面扩张导致的陆地碳排放下限数据，空间分辨率均为~5km。不透水面扩张导致的陆地碳排放是在得到不透水面扩张数据基础上，叠加生物量和土壤有机碳密度地图以及SOC损失率计算得到。SOC损失率是基于全球范围内Meta分析得到的59.5%，该值确定为评估不透水面扩张后SOC碳损失的上限值。同时考虑IPCC国家温室气体排放指南Tier 1方法中建议的20% SOC碳损失率，该值确定为评估不透水面扩张后SOC碳损失的下限值。

This dataset comprises three subsets: global impervious surface expansion data, upper-limit terrestrial carbon emission data resulting from impervious surface expansion, and lower-limit terrestrial carbon emission data resulting from impervious surface expansion, all with a spatial resolution of approximately 5 km. The terrestrial carbon emissions induced by impervious surface expansion are calculated by integrating the impervious surface expansion data with biomass and soil organic carbon density maps and the SOC loss rate. The SOC loss rate of 59.5%, derived from a global meta-analysis, is defined as the upper limit for assessing SOC carbon loss following impervious surface expansion. Meanwhile, the 20% SOC carbon loss rate recommended in the Tier 1 approach of the IPCC Guidelines for National Greenhouse Gas Inventories is defined as the lower limit for assessing SOC carbon loss following impervious surface expansion.