A new daily gridded precipitation dataset for the Chinese mainland based on gauge observations

The new daily gridded precipitation dataset over the Chinese mainland (CHM_PRE) is a long-term precipitation dataset with fine spatiotemporal resolution developed to facilitate the advancement of drought monitoring, flood forecasting, and hydrological modeling. Its record starts from 1961 and keeps updating yearly (currently up to 2022) with spatial resolutions of 0.5° × 0.5°, 0.25° × 0.25°, and 0.1° × 0.1°. Using daily observations from 2,839 gauges across China and nearby regions, the dataset was made through the daily climatology field combined with the precipitation ratio field algorithm. The two interpolation fields were adjusted based on monthly precipitation constraint and topographic characteristic correction.

Global attributes:   

· Variable = daily precipitation (pre)

· Variable = number of stations in each grid every year (station_number)

· Date format = NetCDF

· Temporal Range = 1961-01-01 to 2022-12-31

· Spatial extent = 18°N–54°N, 72°E–136°E

· Units = mm/day

· Missing value = -99.9