2003-2021年黄河流域逐月1 km分辨率VCI和TCI干旱指数数据集

A dataset of monthly VCI and TCI drought indices at a resolution of 1km in the Yellow River Basin(2003-2021)

黄河流域地跨干旱、半干旱和半湿润气候带,其多年平均水资源总量为719.4亿立方米,占全国水资源总量的2.5%,是中国各大流域中受干旱影响最为严重的流域。随着全球气候变化,黄河流域的干旱变化成为研究的热点。本文基于MODIS植被指数产品(MYD13A2,V6)和地表温度辐射产品(MYD11A2,V6),采用Kogan在1995年提出的VCI和TCI指数计算方法,分别生产了黄河流域2003–2021年逐月1 km分辨率VCI和TCI干旱指数数据集。数据经过去云处理、填补缺值和滤除背景噪声等数据质量控制操作,以确保数据集能够满足研究人员使用。通过数据共享,期望为全球变化背景下黄河流域的干旱监测及研究提供重要数据支撑。

The Yellow River Basin is located in the arid,semi-arid climate and semi-humid climate zones.According to the statistics of the Second National Comprehensive Water Resources Planning,its annual average water resources total 71.94 billion m3,accounting for 2.5%of China’s total water resources.However,it is the basin that is most severely affected by drought among the major river basins in China,and ecological protection in the area faces severe challenges.With the global climate change,the drought problem in the Yellow River Basin has attracted more and more attention.Based on MODIS vegetation index products(MYD13A2,V6)and surface temperature radiation products(MYD11A2,V6),we obtained a dataset of monthly VCI and TCI drought indices at a resolution of 1km in the Yellow River Basin(2003–2021)dataset by adopting the calculation method proposed by Kogan in 1995.We carried out data quality control procedures,such as cloud removal,missing value filling-in and background noise filtering-out to ensure that the dataset can meet the needs of researchers.Through data sharing,it is expected to provide important data support for drought monitoring and research in the Yellow River Basin under the background of global climate change.