Abstract:
To investigate the impact of atmospheric pollution on surface winds in central parts of the Mt.Taihang, statistics calculation and trend analysis have been carried out of the visibility, surface air temperature and surface wind speed data at Yangquan, Yushe (mountain station), and Shijiazhuang, Xingtai (plain station) during the period of 1966 to 2005.Resultsshowed that: the visibility of plain stations decreased more than that of mountain stations, the surface temperature, the surface wind speed and the wind at 850 hPa of plain stations all showed a downward trend.While the surface temperature, the surface wind speed at mountain stations showed an upward trend.The results showed that: (1) Surface air temperature at plain stations drops obviously in the afternoon, whereas surface wind speed at mountain stations exhibit an opposite changing trends to that at plain stations, due to the radiative effect and cooling effect of aerosols inhibiting the transmission of the vertical flux. (2) Wind speed observed from radiosonde sounding data at 850 hPa (at the same height of the neighboring mountain station) at plain station has a downward trend, indicating that the enhancement of the surface wind speed at mountain stations was due to the radiation effect of the aerosol of aerosol weakening the vertical energy exchange.