Using the data collected at the Sand Drift Observation Station of Chinese Academy of Sciences in 2005 , t he monthly and seasonal change of rose diagram of wind speed and direction , wind velocity , temperature and humidity profiles near the surface layer are analyzed in detail . These characteristics in the Tengger Desert are made public accordingly. The monthly change of temperature and humidity p rofiles is also very obvious : t he value of temperature in July is greatest , and least in Jan. , and the humidity in Oct . is greatest , and least in April , the humidity in the Spring is least in one year .