摘要
利用1971-2000年冀中滨海平原区廊坊市雾数据、地面气象数据、冀中东部地区雾资料及国家气象中心历史高空数据、MICAPS数据,归纳了廊坊市雾及浓雾的气候特征,计算、分析了廊坊市雾及浓雾的气象条件与预报流程。结果表明：雾及浓雾是廊坊市秋冬季节最频繁的一类灾害性天气,浓雾越浓,灾害性影响特征越显著;在利于雾及浓雾形成的大气环流形势下,地面偏南偏东的微风小于等于3 m.s^-1、相对湿度大于等于50%、6 h气压差绝对值小于等于3.0 hPa及大气层结稳定,尤其1000-925 hPa存在明显逆温层是廊坊市雾及浓雾预报预警的重要参考指标;利用VB等计算机语言实现雾及浓雾的自动化初步识别;进一步探讨了冀中滨海平原区廊坊市雾及浓雾的预报预警发布技术,为廊坊市雾及浓雾的预报预警及服务提供了科学依据。
Based on the data of fog, surface observations from 9 weather stations in Langfang, a city in the central seaside plain of North China, as well as the fog data for the eastern central Hebei Province, the historical radiosonde dada from 1980 to 2000, and MICAPS data from 2004 to 2007, the climatic characteristics and relationship between meteorological element distribution and the occurrence frequency of fogs and heavy fogs in Langfang are analyzed. The results show that fog is one of most disastrous weather with high occurrence frequency in Langfang and mainly appears in winter and autumn; favorable meteorological conditions include surface southerly/easterly wind speed being less than 3 m/s, relative humidity greater than 50%, │△p6│ less than 3 hPa, and there excising stable temperature inversion between 1000 hPa and 925 hPa, which can be used as indexes for forecasting the occurrence of fogs and heavy fogs. The forecasting and early-warning techniques of fog are discussed.
出处
《气象科技》
北大核心
2009年第6期682-687,共6页
Meteorological Science and Technology
关键词
雾
浓雾
气象条件
预报预警
fog
heavy fog
meteorological condition
forecasting
early-warning
