Reconstructing the annual precipitation variation since 1899 based on tree-ring width in the western Hedong sandy land of Ningxia

YaJun WANG, ShangYu GAO, YuZhen MA, RuiJie LU, YanLi SANG, HongWei MENG

Journal of Arid Land . 2010, (4): 286 -294 . DOI: 10.3724/SP.J.1227.2010.00286