湖体对风、湿环境影响的数值模拟

湖体对周边气象环境的影响研究可为气象站站址选择及代表性评估提供依据。应用WRF中尺度模式,通过对四季晴天小风、阴天大风背景天气下有无湖体算例的模拟比较。分析了浙江青山湖湖体对风、湿环境的影响。结果表明:(1)湖体存在通常使近地层风速增加,而春季湖体降温效应会导致近地层风速减小。(2)春夏湿润季节湖体对湿度影响较小,而秋冬干燥季节湖体有明显增湿作用,最大达7 g/kg。(3)青山湖对下风方风速、湿度观测可能产生影响的距离分别为6.5 km、2.7 km。

Numerical Simulation of Lake Body Effect on Wind Speed and Humidity Environment

It can provide scientific base for making meteorological site building standard, to study the effect of lake body on surrounding meteorological environment. This paper studied the impact of Qingshan Lake, which is in Zhejiang Province, on wind sped and humidity by using WRF model, in the clear sky conditions and overcast conditions of four seasons respectively. The results showed that: (1)The existence of the lake increased the wind speeds around it except spring. (2)Lake had less impact on the humidity around it in spring and summer, but in autumn and winter, the impact was obvious which could be 7g/kg. (3)Qingshan lake had effect on the observation of wind speed and humidity, and the influenced distance might be 6.5km and 2.7km.