成山头近海大雾特征分析

Analysis of the Characteristics of Heavy Fog in the Coastal Area of Chengshantou

摘要: 通过2005年~2007年3年地面、探空资料对成山头大雾天气进行分析。结果表明，成山头大雾有明显的日、月、季变化，大雾多发生在03~09时，季节分布不均，夏季大雾多发；发生大雾时风力不大，3~8月多为偏南风流场，高空风向随着高度升高逐渐向偏西风流场变动；大雾强度与逆温层的厚度和逆温强度相关，逆温层越厚，逆温强度越强，能见度越低。

Abstract: Analyze the heavy fog weather in Chengshantou through ground and sounding data from 2005 to 2007. The results show that there are obvious daily, monthly, and seasonal changes in the heavy fog at Chengshantou, with heavy fog occurring mostly from 03 o’clock to 09 o’clock, with uneven seasonal distribution and frequent occurrence in summer; when heavy fog occurs, the wind force is not strong, and from March to August, it is mostly a southerly wind field. The high-altitude wind direction gradually changes towards the westerly wind field as the altitude increases; the intensity of heavy fog is related to the thickness and intensity of the inversion layer. The thicker the inversion layer, the stronger the inversion intensity, and the lower the visibility.