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气象:2019,45(7):968-977
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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,钱玮,包云轩,袁成松,周林义,崔驰潇,王宏斌
(南京信息工程大学气象灾害预报预警和评估协同创新中心,南京 210044; 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,南京 210009; 福建省气象服务中心,福州 350001)
Temporal-Spatial Variations of Summer Heavy Fog and Its Meteorological Influence Factors in Jiangsu Province
ZONG Chen,QIAN Wei,BAO Yunxuan,YUAN Chengsong,ZHOU Linyi,CUI Chixiao,WANG Hongbin
(Collaborative Innovation Center on Forecast Meteorological Disaster Warning and Assessment, Nanjing University of Information Science and Technology, Nanjing 210044; Key Laboratory of Transportation Meteorology, Jiangsu Institute of Meteorological Sciences, Nanjing 210009; Fujian Meteorological Service Center, Fuzhou 350001)
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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 min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℃、风速低于3 m·s-1,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—06时,消散集中于05—08时,持续时间主要在6 h以内。(3)夏季浓雾以辐射雾为主,辐射雾、平流雾和锋面雾分别占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。
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 temporal-spatial distribution patterns of summer heavy fog and its meteorological influence factors are analyzed. The results show that: (1) The heavy fog tends to be formed under the condition that the temperature is less than 29℃, the wind speed is slower than 3 m·s-1 and prevailing in the easterly wind. The low temperature and high humidity during the Meiyu season are probably the causes for 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 00:00 BT to 06:00 BT and dissipates from 05:00 BT to 08:00 BT, and the duration is mainly within 6 hours. (3) Summer fog is mainly radiation fog. 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 higher than that in the southern Jiangsu. (5) The weak rainfall of 6-24 h before the fog formation provides water vapor to the near-surface layer. After that, the weather clears with the stable atmosphere statically, which is beneficial to the appearance of summer heavy fog.
文章编号:     中图分类号:P49,P466    文献标志码:
基金项目:江苏省气象局北极阁基金项目(BJG201703、BJG201606和BJG201701)及江苏省自然科学青年基金项目(BK20161073)共同资助
引用文本:
宗晨,钱玮,包云轩,袁成松,周林义,崔驰潇,王宏斌,2019.江苏省夏季浓雾的时空分布特征及气象影响因子分析[J].气象,45(7):968-977.
ZONG Chen,QIAN Wei,BAO Yunxuan,YUAN Chengsong,ZHOU Linyi,CUI Chixiao,WANG Hongbin,2019.Temporal-Spatial Variations of Summer Heavy Fog and Its Meteorological Influence Factors in Jiangsu Province[J].Meteor Mon,45(7):968-977.