[Objective] The characteristics and rules of low-level air in Anqing from 2004 to 2008 were studied.[Method] By dint of L waveband radar air-exploration meteorological data in Anqing station from 2004 to 2008,the char...[Objective] The characteristics and rules of low-level air in Anqing from 2004 to 2008 were studied.[Method] By dint of L waveband radar air-exploration meteorological data in Anqing station from 2004 to 2008,the characteristics in the lower air in Anqing were studied based on wind speed profile and wind rose profile.[Result] Anqing,which locates in the lower reaches of Yangtze River,was influenced by monsoon and wind seasonal changes were distinct.The northeast wind prevailed in the near-ground layer and average annual frequency was 34.6%.The still wind frequency was relatively high and annual average reached 18.5%.The frequency of southwest wind in the summer-half-year increased.The frequency of wind from 700 m to the upper air was relatively diverged,and it was mainly westerly to 3 000 m high.According ot the wind speed profile,wind speed in the height below 700 m enlarged and then it slowed down from 700 to 2 000 m high and in winter the wind above 2 000 m fastened dramatically.[Conclusion] The characteristics of wind speed and wind direction in Anqing in recent years were summarized,which provided reference for climate changes in Anqing.展开更多
文摘[Objective] The characteristics and rules of low-level air in Anqing from 2004 to 2008 were studied.[Method] By dint of L waveband radar air-exploration meteorological data in Anqing station from 2004 to 2008,the characteristics in the lower air in Anqing were studied based on wind speed profile and wind rose profile.[Result] Anqing,which locates in the lower reaches of Yangtze River,was influenced by monsoon and wind seasonal changes were distinct.The northeast wind prevailed in the near-ground layer and average annual frequency was 34.6%.The still wind frequency was relatively high and annual average reached 18.5%.The frequency of southwest wind in the summer-half-year increased.The frequency of wind from 700 m to the upper air was relatively diverged,and it was mainly westerly to 3 000 m high.According ot the wind speed profile,wind speed in the height below 700 m enlarged and then it slowed down from 700 to 2 000 m high and in winter the wind above 2 000 m fastened dramatically.[Conclusion] The characteristics of wind speed and wind direction in Anqing in recent years were summarized,which provided reference for climate changes in Anqing.
