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首页> 外文会议>25th Conference on Agricultural and Forest Meteorology and 12th Joint Conference on the Applications of Air Pollution Meteorology with Aamp;WMA and Fourth Symposium on the Urban Environment May 20-24, 2002 Norfolk, Virginia >AN OBSERVATIONAL ANALYSIS OF VERTICAL DISTRIBUTIONS OF SO_2 IN THE SURFACE LAYER OF BEIJING DURING COLD WAVE PASSING IN WINTER
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AN OBSERVATIONAL ANALYSIS OF VERTICAL DISTRIBUTIONS OF SO_2 IN THE SURFACE LAYER OF BEIJING DURING COLD WAVE PASSING IN WINTER

机译：冬季冷波穿越北京表层SO_2垂直分布的观测分析。

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摘要

According to the Beijing 10-day vertical observation of the SO_2 concentration and the simultaneous analysis of meteorological observations based on Meteorological Tower, we can draw the following conclusions: (1) There were two times of outbreak of cold air during observation. The structure of boundary layer was affected during outbreaks of cold air accompanying with lower level wind maximum core (LLWMC), which has an important effect on the change of SO_2 concentration. When there existed LLWMC, the concentration of SO_2 was comparatively low and homogeneous vertically. After collapse of LLWXC, the concentration of SO_2 decreased rapidly. (2) During the daytime, thermodynamic turbulence played an important role in the vertical distribution of SO_2 concentration, and the maximal concentration always maintained at the height of around 80 m. (3) During night, the condition of breeze and inversion was the main reason that caused pollution with high SO_2 concentrations in the surface layer.
机译：根据北京对SO_2浓度的10天垂直观测以及基于气象塔的气象观测同时分析，可以得出以下结论：（1）观测期间发生了两次冷空气爆发。伴随着低空最大风向核心（LLWMC）的爆发，冷空气的爆发影响了边界层的结构，这对SO_2浓度的变化具有重要影响。当存在LLWMC时，SO 2的浓度相对较低并且在垂直方向上均匀。 LLWXC崩溃后，SO_2的浓度迅速下降。 （2）在白天，热力学湍流在SO_2浓度的垂直分布中起着重要作用，最大浓度始终保持在80 m左右。 （3）夜间，微风和逆温条件是造成表层SO_2浓度较高的污染的主要原因。

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