Dataset of a composite drought index based on remote sensing data for Niger

The present dataset was created for agricultural drought characterization in the Sahelian climate zone of Niger. The dataset comprises the seasonal time series of a composite drought index (CDI) and the corresponding drought classes at a spatial resolution of 1 km2 for the period 2000-2020. The CDI was computed from remotely sensed data, namely precipitation of the CHIRPS (Climate Hazards Group InfraRed Precipitation with Stations), normalized difference vegetation index (NDVI) and land surface temperature (LST) data from MODIS (Moderate Resolution Imaging Spectroradiometer). The files in the present dataset are: - A netcdf file containing drought intensities and drought classes - A netcdf of the accumulated seasonal CHIRPS rainfall data - A netcdf file of the mean seasonal NDVI data - A netcdf file of the mean day time LST data - A shapefile of the map of Niger - A jpeg file describing the study area - Three png file of the figure used in the data in brief article本数据集专为尼日尔萨赫勒气候区的农业干旱特征表征研究构建。该数据集涵盖2000至2020年时段内、空间分辨率为1平方千米的合成干旱指数（Composite Drought Index, CDI）季节时序序列及对应干旱等级。合成干旱指数基于遥感数据计算得到，所用数据源包括气候灾害群组站校准红外降水（Climate Hazards Group InfraRed Precipitation with Stations, CHIRPS）的降水数据，以及中分辨率成像光谱仪（Moderate Resolution Imaging Spectroradiometer, MODIS）获取的归一化植被指数（Normalized Difference Vegetation Index, NDVI）与地表温度（Land Surface Temperature, LST）数据。本数据集包含以下文件： - 存储干旱强度与干旱等级的NetCDF文件 - 累积季节尺度CHIRPS降水数据的NetCDF文件 - 平均季节尺度NDVI数据的NetCDF文件 - 平均日间地表温度数据的NetCDF文件 - 尼日尔区域矢量Shapefile文件 - 用于说明研究区域的JPEG图像文件 - 三篇用于本数据集数据简报文章的配图PNG文件