Abstract: Based on the two-phase regression model and the historical information of meteorological station,the wind speed data from the two typical high mountainous stations of Nanyue and Lushan in Central China during 1960-2017 were tested for their homogeneity and then were corrected.After that,variations of annual-averaged wind speed and their differences relative to the surrounding low altitude stations were analyzed and verified by the NCEP/NCAR reanalysis data.The results indicate that the wind speed series of Nanyue has an inhomogeneous point which caused by wind instrument changes,while no inhomogeneous point is identified in Lushan.The annual and seasonal averaged wind speed in Nanyue and Lushan are significantly higher than that in the surrounding low altitude stations.For the high mountainous stations,the maximum wind speed occurs in spring and summer,and the seasonal differences are small for the low altitude stations.The annual and seasonal averaged wind speed show significant decreasing trends during 1960-2017 at the high mountainous stations and low altitude stations,with the decreasing rates in the mountainous stations much higher than that at the low altitude stations.The difference of mean wind speed variations between 850 hPa and 1000 hPa from NCEP/NCAR in the same area is basically consistent with the difference between the high mountainous stations and low altitude stations,which suggests that the difference of wind speed between the mid-low altitude and surface has universality in Central China.

Key words: High mountainous meteorological station, Wind speed, Homogeneity