Daily SPEI dataset in China from 1980 to 2100

The future state of drought in China under climate change remains uncertain. This study investigates drought events, focusing on the region of China, using simulations from five global climate models (GCMs) under three Shared Socioeconomic Pathways (SSP1-2.6, SSP3-7.0, and SSP5-8.5) participating in the Inter-Sectoral Impact Model Intercomparison Project (ISIMIP3b). The daily Standardized Precipitation Evapotranspiration Index (SPEI) is employed to analyze drought severity, duration, and frequency over three future periods. Evaluation of the GCMs’ simulations against observational data indicates their effectiveness in capturing historical climatic change across China. The rapid increase in CO2 concentration under high emission scenarios in the mid- and late- future century (2040–2070 and 2071–2100) substantially influences vegetation behavior via regulation on leaf stomata and canopy structure. This regulation decelerates the increase in potential evapotranspiration, thereby mitigating ..., , , # Daily SPEI dataset in China from 1980 to 2100

The daily Standardized Precipitation Evapotranspiration Index (SPEI) dataset used the PM-CO2 model to calculate PET with a spatial resolution of 0.5° × 0.5° from 1980 to 2100. This dataset investigates drought, focusing on the region of China, using simulations from five global climate models (GCMs) under three Shared Socioeconomic Pathways (SSP1-2.6, SSP3-7.0, and SSP5-8.5) participating in the Inter-Sectoral Impact Model Intercomparison Project (ISIMIP3b).

气候变化背景下中国未来干旱状态仍存在不确定性。本研究聚焦中国区域干旱事件，采用参与跨部门影响模型比对项目第三阶段（Inter-Sectoral Impact Model Intercomparison Project, ISIMIP3b）的5个全球气候模型（Global Climate Models, GCMs）在3种共享社会经济路径（Shared Socioeconomic Pathways, SSP1-2.6、SSP3-7.0及SSP5-8.5）下的模拟结果开展分析。研究采用逐日标准化降水蒸散指数（Standardized Precipitation Evapotranspiration Index, SPEI），对三个未来时段的干旱强度、持续时长与发生频率展开分析。通过观测数据对GCMs的模拟结果进行评估，结果显示这些模型能够有效捕捉中国区域的历史气候变化特征。在世纪中后期（2040-2070年与2071-2100年）的高排放情景下，二氧化碳浓度的快速上升通过调控植物叶片气孔与冠层结构，显著影响植被生理行为；该调控过程会减缓潜在蒸散量的增长速率，进而缓解……
# 1980-2100年中国逐日标准化降水蒸散指数数据集
本数据集为1980-2100年中国逐日标准化降水蒸散指数（SPEI）数据集，采用PM-CO₂模型计算潜在蒸散量，空间分辨率为0.5°×0.5°。本数据集聚焦中国区域干旱研究，使用参与跨部门影响模型比对项目第三阶段（ISIMIP3b）的5个全球气候模型（GCMs）在3种共享社会经济路径（SSP1-2.6、SSP3-7.0及SSP5-8.5）下的模拟结果构建。