利用Himawari-8资料分析京津冀地区冬季雾的空间分布和演变过程  

Spatial Distribution and Evolution of Winter Fog Over Beijing-Tianjin-Hebei Region Retrieved by Himawari-8

作　　者：叶子恒 龚安保 徐峻[1] 田润泽 韩文超 张众志 马琳琳 唐枷榕 黄荷卉 李汶泽 YE Ziheng;GONG Anbao;XU Jun;TIAN Runze;HAN Wenchao;ZHANG Zhongzhi;MA Linlin;TANG Jiarong;HUANG Hehui;LI Wenze(Atmospheric Environment Institute,Chinese Researsh Academy of Environment Sciences,Beijing 100012,China;Shandong Academy for Environmental Planning,Jinan 250101,China;Henan Meteorological Disaster Prevention Technology Center,Zhengzhou 450003,China;Mawei District Meteorological Administration,Fuzhou 350015,China)

机构地区：[1]中国环境科学研究院大气环境研究所,北京100012 [2]山东省生态环境规划研究院,山东济南250101 [3]河南省气象灾害防御技术中心,河南郑州450003 [4]福建省福州市马尾区气象局,福建福州350015

出　　处：《环境科学研究》2024年第5期939-949,共11页Research of Environmental Sciences

基　　金：国家自然科学基金项目(No.41575127);国家重点研发计划项目(No.2022YFC3703405)。

摘　　要：京津冀地区冬季雾霾过程频发,然而确定雾的空间分布一直是难点.本研究利用高分静止卫星Himawari-8的可见光和红外通道资料,分析2021年11月3-5日一次典型的京津冀地区雾的分布和演变过程.结果表明:①通过11.2μm与3.9μm通道的亮温差值(-8~-3 K)反演夜间雾的区域分布以及对应的雾顶高度,效果较好.②11月3-5日每天发生的雾,其类型、区域分布和演变过程都呈现不同的特征,3日清晨的雾为平流雾,覆盖范围为3 d中最大,几乎涵盖京津冀地区的平原地带;受西南水汽输送影响,北京市以南地区的雾发展较充分、持续时间最长,其中天津市北部的雾甚至在整个白天仍能维持.③11月4日和5日清晨均出现呈三角形区域分布的辐射雾,雾区的北缘和西缘分别因太行山和燕山山脉的阻挡形成,雾区南缘受低层风场作用位于天津市-石家庄市一线,呈平直的东北-西南走向,与非雾区界限分明;区域性静稳条件下,城市热岛效应对雾的分布和演变有重要影响.研究显示,京津冀地区冬季雾的分布和演变会受到水汽平流、低层风场、地形、热岛效应等多方面影响.Foggy-haze weather occurs frequently in the Beijing-Tianjin-Hebei region in winter.However,the regional distribution of heavy fog in the Beijing-Tianjin-Hebei region has been difficult to distinguish.Based on the data of visible and infrared channels of the highresolution geostationary satellite Himawari-8,the regional distribution and evolution of a typical fog in the Beijing-Tianjin-Hebei region from November 2nd to 5th,2021 was analyzed.The results showed that:(1)The nighttime fog area distribution and fog top height characteristics were inverted through the brightness temperature difference of the 11.2μm and 3.9μm channels(from-8 to-3 K),which was consistent with the actual situation and the effect was good.(2)The types and regional distribution of the fog in these three days showed different characteristics.The fog in the early morning of the Novermber 3rd was advection fog,covering the largest area in three days,almost covering the plains of the Beijing-Tianjin-Hebei region.Affected by the water vapor transport from the southwest,the fog developed comprehensively and lasted the longest in southern Beijing,covering the area in northern Tianjin and even lasted throughout the day.(3)The morning fog on the 4th and 5th was radiation fog,with a triangular distribution shape.The northern and western edges of the fog area were blocked by the Taihang Mountains and the Yanshan Mountains,respectively.The southern edge of the fog area was located on the Tianjin Shijiazhuang line,running northeast to southwest,with a clear boundary with the non-fog area.Due to its strong static and stable conditions,the regional distribution and evolution of fog were obviously affected by the urban heat island effect.The results show that the distribution and evolution of winter fog in the Beijing-Tianjin-Hebei region will be affected by water vapor,low-altitude wind field,topography,and heat island effect.

关 键 词：京津冀 雾 Himawari-8 双通道亮温差法 空间分布 

分 类 号：X51[环境科学与工程—环境工程]