Research and Application of Precipitation Dataset in Sichuan Province Based on Self-recording Observation and Automatic Station Observation

The digitization technology and scientific research of historical meteorological data have undergone continuous development. Through the digitization of nearly 800, 000 pages of precipitation self-recording paper traces of the national meteorological stations in Sichuan Province, and the integration of precipitation observation data after the upgrading of the automatic observation system of the meteorological stations, the precipitation intensity dataset with the longest sequence and the highest time density in Sichuan Province was developed, and the precipitation minute data of Sichuan Province was advanced to 1951. The applicability and accuracy of the dataset was evaluated by the quality control of the dataset, including the completeness, normativity, and data constraints, and by comparing the consistency of the maximum values of the total precipitation processes in the same time periods and the corresponding time processes. Extensive research activities such as the rescue and digitization of historical meteorological data are carried out to dig deep into the maximum information of precious historical data, provide better data application support for meteorological services and scientific research, and realize the scientific value of historical meteorological observation records.