Comparison Between Observational Data and Grid Data of Precipitation for the Last One hundred Years in China

The global grid data of land precipitation are compared with observational data in China. It is shown that the grid data are good to describe the large-scale features of rainfall field. More than 40 grid datasets which have higher spatial and temporal coverage can represent the data about 200 stations. When using grid data to analyse the precipitation in China, it is necessary to modify the grid series near the border and coastal area in China in order to have a better representativeness for data.