%0 Journal Article %T A multi-scale daily SPEI dataset for drought characterization at observation stations over mainland China from 1961 to 2018 %A Wang, Q. %A Zeng, J. %A Qi, J. %A Zhang, X. %A Zeng, Y. %A Shui, W. %A Xu, Z. %A Zhang, R. %A Wu, X. %A Cong, J. %J Earth Syst. Sci. Data %D 2021 %8 February 11 %V 13 %N 2 %I Copernicus Publications %@ 1866-3516 %F Wang2021 %R 10.5194/essd-13-331-2021 %U https://essd.copernicus.org/articles/13/331/2021/ %U https://essd.copernicus.org/articles/13/331/2021/essd-13-331-2021.pdf %U https://doi.org/10.5194/essd-13-331-2021 %P 331-341