CONFIDENCE ANALYSIS OF NCEP/NCAR 50-YEAR GLOBAL REANALYZED DATA IN CLIMATE CHANGE RESEARCH IN CHINA

The confidence of the NCEP/NCAR 50-year Reanalyzed data in climatic change research in China has been examined and the results show that in the reanalyzed data there exist some uncertainties in studying the trends of climatic change. The confidence of the reanalyzed data is better in the eastern and southern parts of China than in the western and northern for surface temperature and surface pressure. The surface temperature is more useful than surface pressure. The reanalyzed data is better after 1979 than before 1979.