阳江市城市热岛效应特征分析

Characteristics of Urban Heat Island Effect in Yangjiang

通过对1998年-2003年阳江旧站和阳春新站同期观测数据的分析,得知阳江热岛基本存在着秋冬季强、春夏季弱,一天中以08:00最强、14:00最弱的特点,但具体情况还跟天空状况有关。结果显示,天空状况和海陆风是影响阳江热岛的主要气象因素,其中天空状况对热岛发生频率及其强度具有明显的影响,表现出晴到少云状况下出现热岛的频率较多云到阴时高的特点。结果表明,阳江市城市热岛效应整体上不是非常明显,热岛强度以弱热岛和无热岛为主,炎热(或酷暑)天气较少,通常只在台风来临前,才有1～2天的闷热天。

By analyzing the same period observing data from the old station in Yangjiang and the new station in Yangchun during 1998 to 2003, it is clarified that the heat island of Yangjiang is characterized by strong in autumn and winter, weak in spring and summer, strongest at 8 am. and weakest at14 pm.. But the actual situation is related to the sky state. The results show that the sky state as well as sea and land breeze are the main meteorological factors that affect the heat island of Yangjiang, among which, the sky state has obvious impact on frequency and strength of the heat island. The frequency of heat island phenomenon during clear and cloudy weathers is higher than that during the overcast weather. As a result, the heat island phenomenon in Yangjiang is not obvious, and the degrees of the heat island mainly include weak heat island and non - heat island. Blazing weather is rare, but generally occurs in one or two days before the typhoon.