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江苏省夏季浓雾的时空分布特征及气象影响因子分析
宗晨1,2, 钱玮2, 包云轩1,2, 袁成松2,1, 周林义2, 崔驰潇1,2, 王宏斌2
(1.南京信息工程大学气象灾害预报和评估协同创新中心;2.中国气象局交通气象重点开放实验室/江苏省气象科学研究所)
Temporal-spatial variations of summer heavy fog and its meteorological influence factors in Jiangsu
Zong Chen1,2, Qian Wei2, Bao Yunxuan1,2, Yuan Chengsong2,1, Zhou Linyi2, Cui Chixiao1,2, Wang Hongbin2
(1.Collaborative Innovation Center on Meteorological Disaster Forecast and Assessment, Nanjing University of Information Science and Technology;2.Key Laboratory of Transportation Meteorology, Jiangsu Meteorological Institute)
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投稿时间:2018-08-13    修订日期:2019-04-22
中文摘要: 利用江苏省70个国家基本站逐10分钟连续观测资料,对江苏省夏季浓雾的时空分布特征及影响因子进行分析研究。结果表明:(1)夏季浓雾易在气温小于29°C、风速低于3 m/s,且盛行偏东风的条件下形成;低温高湿的梅雨期是夏季浓雾在6月份高发(42.4%)的可能原因。(2)夏季浓雾生消时间与秋冬季显著不同,主要发生于00时—06时,消散集中于05时—08时,持续时间主要在6h以内。(3)夏季浓雾以辐射雾为主,辐射雾、平流雾和锋面雾各占58.1%、35.5%和6.4%。(4)夏季浓雾发生频次呈现从东北部沿海地区向西南部内陆地区递减的趋势,淮北地区夜间降温幅度高于苏南地区是出现这一现象的主要原因。(5)成雾前6—24 h出现的弱降水为近地层提供水汽,此后天气转晴,静稳的大气层结下有利于夏季浓雾的出现。
中文关键词: 浓雾  夏季  时空分布  影响因子
Abstract:Based on the consecutive observational data per ten minute from 70 surface stations on the National Automatic Weather Observational Net during from 2013 to 2016 in Jiangsu Province, The spatial and temporal distribution patterns of summer heavy fog and its meteorological influence factors are analyzed. The results show that: (1) The heavy fog is mainly formed under the condition that the temperature is less than 29 °C, the wind speed is lower than 3 m/s and prevailing in the easterly wind. The low temperature and high humidity during the Meiyu period are the reasons why the summer heavy fog with a higher frequency (42.4%) in June. (2) The diurnal variation of summer heavy fog is significantly different from the diurnal variations in autumn and winter. The heavy fog mainly appears from 0:00 a. m. to 6:00 a. m. and dissipates from 5:00 a. m. to 8:00 a. m, and the duration is mainly within 6 hours. (3) Summer fog is mainly radiation fog, and the radiation fog, advection fog and front fog account for 58.1%, 35.5% and 6.4% respectively. (4) The frequency of heavy fog presents a general decrease trend from the northeastern coastal region to the southwestern inland because the cooling rate in the north of the Huaihe River of Jiangsu is larger than that in the southern Jiangsu. (5) The weak rainfall of 6-24 hours before the fog formation provides water vapor to the near-surface layer, after that, the weather clears with the stable atmosphere statically is beneficial to the appearance of summer heavy fog.
文章编号:201808130358     中图分类号:    文献标志码:
基金项目:江苏省气象局北极阁基金项目(BJG201703, BJG201606, BJG201701)和江苏省自然科学青年基金项目(BK20161073)
引用文本:
宗晨,钱玮,包云轩,袁成松,周林义,崔驰潇,王宏斌,0.[en_title][J].Meteor Mon,():-.
Zong Chen,Qian Wei,Bao Yunxuan,Yuan Chengsong,Zhou Linyi,Cui Chixiao,Wang Hongbin,0.Temporal-spatial variations of summer heavy fog and its meteorological influence factors in Jiangsu[J].Meteor Mon,():-.