基准期（1986-2005）与升温1.5℃（2020-2039）情景下中国干旱频率与持续时间数据集

基准期与升温1.5℃情景下中国干旱频率与持续时间数据集是基于ISI-MIP输出的5个气候模型(GFDL-ESM2M、HadGEM2-ES、IPSL-CM5A-LR、MIROC-ESM-CHEM、NorESM1-M)在基准期（1986-2005年）和升温1.5℃（RCP2.6,2020-2039年）情景下的预估结果。本数据集的研发应用的气象数据有1986-2005年和RCP2.6情景下的逐日降水量、最高气温、最低气温、风速、相对湿度和太阳辐射(分辨率为0.5&deg x 0.5&deg)。以标准化降水蒸散指数（SPEI）作为干旱指标，将SPEI为(-∞,-2)、[-2，-1)、[-1，-0.5)分别划为极端干旱，中等干旱和轻度干旱。将研究时段内，中等干旱和极端干旱发生的月份数除以干旱事件的次数定义为干旱持续时间。其中，从SPEI <-0.5的月份开始到SPEI≥-0.5的月份的结束算作一次干旱事件。该数据集包括基准期（1986-2005年）和升温1.5℃（RCP2.6， 2020-2039年）两种情景下的下列数据：（1）基准期的干旱频率，包括：轻度干旱频率、中等干旱频率和极端干旱频率；（2）基准期干旱持续时间；（3）升温1.5℃情景下2020-2039年的干旱频率，包括轻度干旱频率、中等干旱频率和极端干旱频率；（4）升温1.5℃情景下2020-2039年干旱持续时间。数据集存储为.tif和.xlsx格式，由33个数据文件组成，数据量为1.53 MB（压缩为1个文件,0.99 MB）。基于该数据集的分析研究成果发表在《Earth System Dynamics》2018年第9期。

Drought Frequency and Duration Dataset in China Under Baseline Period and 1.5°C Warming Scenario is developed based on the projection outputs of 5 climate models (GFDL-ESM2M, HadGEM2-ES, IPSL-CM5A-LR, MIROC-ESM-CHEM, NorESM1-M) from the ISI-MIP project, covering the baseline period (1986–2005) and the 1.5°C warming scenario (RCP2.6, 2020–2039). The meteorological data applied for developing this dataset include daily precipitation, maximum temperature, minimum temperature, wind speed, relative humidity, and solar radiation for the 1986–2005 period and under the RCP2.6 scenario, with a spatial resolution of 0.5° × 0.5°. The Standardized Precipitation Evapotranspiration Index (SPEI) was employed as the drought indicator, where SPEI values of (-∞, -2), [-2, -1), and [-1, -0.5) are classified as extreme drought, moderate drought, and mild drought, respectively. Drought duration is defined as the total number of months with moderate or extreme drought divided by the count of drought events during the study period. A drought event is defined as the period from the first month with SPEI < -0.5 to the last month with SPEI ≥ -0.5. This dataset includes the following data under both the baseline period (1986–2005) and 1.5°C warming scenario (RCP2.6, 2020–2039): (1) Drought frequencies during the baseline period, including mild drought frequency, moderate drought frequency, and extreme drought frequency; (2) Drought duration during the baseline period; (3) Drought frequencies during 2020–2039 under the 1.5°C warming scenario, including mild drought frequency, moderate drought frequency, and extreme drought frequency; (4) Drought duration during 2020–2039 under the 1.5°C warming scenario. The dataset is stored in .tif and .xlsx formats, consisting of 33 data files with a total size of 1.53 MB (compressed into a single file of 0.99 MB). Research results based on analyses of this dataset were published in *Earth System Dynamics*, Volume 9, 2018.