| 天气与气候 |
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| Simulation on Air Flow 3-Dimension Trajectories of the Boundary Layer at Akerdala Background Atmosphere Station |
| ZHUANG Guang xing; CUI Cai xai; ZHAO Yuan mao; et al. |
| 1.Institute of Desert Meteorology, China Meteorological Administration, Urumiq 830002, China; 2.Meteorlogical Bureau of Kunming City, Kunming 650034, China |
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Abstract According to the re-analyzed data from NCEP during the period of 1994—2002 and the simulation of the HYSPLIT v4.7 Model on 3-dimension back trajectories of air mass at Akerdala station, several trajectories reflecting the main characteristics of air flow were obtained based on the classification of cluster analysis on the thousands of back trajectories. Plotted and analyzed by vertical layers and seasons, the features of air flow trajectories in boundary layer inside 100 m and 1 000 m above ground in different seasons were mainly studied during the nine years, as well as the frequencies of different directions and the relations between local weather situation, ground weather system and air flow trajectories. Contrasted with the wind rose curves of meteorological stations nearby, the seasonal features of air flow trajectories, the positions of weather system and their moving routes were revealed. Combined with the distribution and development of the surrounding cities and the trajectories of air mass, it has been analyzed the potential influences on the Akerdala background atmosphere station. So the scientific evidences for founding regional background atmosphere stations, meanwhile, the background data on local direction and velocity of air mass movement near surface for further research were provided. At the same time, it has been introduced the simulation method on HYSPLIT v4.7 Model through examples. And it is hoped to be used in research on gas pollutants and sand-dust tracing to the source, sites choice of facility station that are sensitive to air pollution, as well as environmental appraisal on the facility construction of source pollutants discharge.
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Received: 16 November 2006
Published: 20 January 2008
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2008, Vol. 28 
