【摘要】 利用湖州国家基本气象站2001-2011年地面气象观测资料及杭州探空站探空资料,对湖州地区霾天气的地面天气类型及其影响因子进行了分析。结果表明,(1)湖州地区高压控制、高压底部、高压后部和地面倒槽类型天气形势对霾的产生较为有利,冷锋、东风带和气旋系统影响时霾出现的概率较小。(2)风向为东南偏东风、东南风和风速在2~4 m/s时易发生霾天气,24 h风速变化越小越容易引发霾天气;24 h气压减小比气压增大更利于霾天气发生,且气压变化越小越容易引发霾天气;24 h气温升高比气温降低更利于霾天气发生,24 h气温变化为1~2℃最易引发霾天气,且城市上空大气的逆温对霾的形成也有明显的影响;降水后的第二天最易发生霾天气,降水次日霾天气发生也较多,随着连续不降水日的增多,霾天气发生减少;大气稳定度表现为中性类时,即B、C稳定度等级,霾天气易发生。更多还原

【Abstract】 Employing the ground observation data of Huzhou national basic meteorological station from2001- 2011 and sounding data from Hangzhou rawinsonde station to have an analysis on the ground surface weather types and influencing factors of Huzhou‘s haze days. The results shows that,(1) The weather types like high pressure control, high pressure at the rear and bottom, and ground inverse trough of Huzhou area are more advantageous to producing haze. While cold front, easterlies and cyclone system are less advantageous to the haze.(2) The wind of southeast by east and southeast and the wind speed at2 ~ 4m/s is easier to occur the haze; the wind changes smaller in 24 hours, the haze occurs easier;pressure decreasing in 24 hours is more conducive to the haze weather than the pressure increasing and the pressure changes smaller, the haze occurs easier; temperature increasing in 24 hours is easier to occur the haze than temperature decreasing and the temperature changes of 1 ~ 2℃ is most easily lead to haze, and the atmospheric inversion over the city has significant impact on the formation of haze; second day after the rainfall is the most prone to haze. With the increasing of continuous no precipitation days,the haze weather occurs less; if the atmospheric stability appears for neutral class, i.e. B, C stability grade, haze weather occurs easier.更多还原