Climatic Change of Qinghai-Xizang Plateau Region in Recent 40-year Reanalysis and Surface Observation Data——Contrast of Observational Data and NCEP, ECMWF Surface Air Temperature and Precipitation

The observation data over Qinghai-Xizang Plateau, NCEP/NCAR reanalysis data, ECMWF reanalysis data were applied to compare and analyze the climate change over Qinghai-Xizang Plateau in recent forty years. It is found that the climatic warming of surface observation data selected in recent forty years is obvious, whereas the reanalysis data over Qinghai-Xizang Plateau show no evidence of obvious climatic warming during this period. The interannual change of ECMWF reanalysis surface precipitation data show that the precipitation over Qinghai-Xizang Plateau haven′t obvious wet or dry tendency in recent forty years. But it seems ECMWF reanalysis precipitation data in recent ten years is in a comparably wet period over Qinghai-Xizang Plateau.