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温坨子区域地面水平流场分布特征研究
CHARACTERISTICS OF SURFACE WIND SPEED FIELD AT WENTOUZI REGION IN EAST LIAONING PROVINCE
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摘要: 利用辽东湾温坨子地区冬夏两季大气扩散试验资料，采用风场诊断模式，对拟建核电站厂区水平风场的分布特征进行了研究, 以为评估该地区拟建核电站的大气污染扩散状况提供基本参数与依据。结果表明：冬季该地区水平风场分布主要有3种形式：1) 呈偏南风型的风场；2) 偏北风型的风场；3) 厂址附近位于高低压中心之间，或整个区域是一均压场, 这时系统风弱，局地风 (包括山谷风及海陆风) 明显，整个区域地面风场比较混乱。夏季该地区水平风场分布主要有4种形式：1) 受季风控制，呈偏南风型的风场；2) 系统风较弱，呈海陆风型的风场；3) 锋前低压控制，产生切变型的风场；4) 受季风控制，呈偏北风型的风场。Abstract: Based on wind field diagnostic model and atmospheric diffusion experimental data in winter and summer seasons of 1993 at Wentouzi region in the east of Liaoning Province, the horizontal wind field pattern at nuclear-power station is analyzed. The results indicate that there are three kinds of the horizontal wind fields in winter season: 1) southerly wind fields; 2) northerly wind fields; and 3) the nuclear-powered site is located between high pressure and low pressure, or the whole region is located in an averaged pressure field, while system wind flows weakly, mountain-valley wind flows obviously, and the surface wind field in this area is not obvious. There are four kinds of the horzontal wind fields in summer season: 1) southerly wind field; 2) land-sea wind field; 3) shear of wind field; 4) northerly wind field. This study provides the basic parameters and theoretical guidance for evaluating air-pollution in this region.
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图 4 风速场 (a)7月30日04:00(b)7月30日14:00 (c)7月30日20:00
1993年7月28日是偏南风型的个例.这天本区处于一高压脊的前部.04:00为东风，08:00风速变大，风向为东南风.12:00为南风，风速较大，16:00~24:00为东南风.(图略).
表 1 1993年的小球测风资料
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