| An Analysis and Modeling Study of a Sea Fog Event over the Yellow and Bohai Seas |
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| 作者单位： | FU Gang（Laboratory of Physical Oceanography, Department of Meteorology, Ocean University of China, Qingdao 266003, P. R. China） ;
GUO Jingtian（Laboratory of Physical Oceanography, Department of Meteorology, Ocean University of China, Qingdao 266003, P. R. China） ;
Angeline Pendergrass（Department of Meteorology, University of Miami, Coral Gables, FL 33146, USA） ;
LI Pengyuan（Laboratory of Physical Oceanography, Department of Meteorology, Ocean University of China, Qingdao 266003, P. R. China） ; |
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| 基金项目： | 国家自然科学基金，国家高技术研究发展计划(863计划)，State Oceanic Administration，中国气象局资助项目，United States National Science Foundation Research Experience for Undergraduates in Marine Science and Engineering in China (NSF-China)，国家自然科学基金 |
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| 摘 要： | In this study, a sea fog event which occurred on 27 March 2005 over the Yellow and Bohai Seas was investigated observationally and numerically. Almost all available observational data were used, including satellite imagery of Geostationary Operational Environmental Satellite (GOES)-9, three data sets from station observations at Dandong, Dalian and Qingdao, objectively reanalyzed data of final run analysis (FNL) issued by the National Center for Environmental Prediction (NCEP) and Regional Atmospheric Modeling System (RAMS) results. Synoptic conditions and fog characteristics were analyzed. The fog formed when warm,moist air was advected northwards over the cool water of the Yellow and Bohai Seas, and dissipated when a cold front brought northerly winds and cool, dry air. In order to better understand the fog formation mechanism, a high-resolution RAMS modeling with a 6km×6km grid, initialized and validated by FNL data, was designed. A 48h modeling that started from 12 UTC 26 March 2005reproduced the main characteristics of this sea fog event. The simulated lower visibility area agreed reasonably well with the sea fog region identified from the satellite imagery. Advection cooling effect seemed to play a significant role in the fog formation.
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| 关 键 词： | 海雾 黄海 渤海 卫星图像 数字模拟 低能见度 |
| 收稿时间： | 2007-05-15 |
| 修稿时间： | 2007-09-20 |
An analysis and modeling study of a sea fog event over the Yellow and Bohai Seas |
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| Authors: | Fu Gang Guo Jingtian Angeline Pendergrass Li Pengyuan |
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| Institution: | 1. Laboratory of Physical Oceanography, Department of Meteorology, Ocean University of China, Qingdao 266003, P. R. China
2. Department of Meteorology, University of Miami, Coral Gables, FL 33146, USA |
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| Abstract: | In this study, a sea fog event which occurred on 27 March 2005 over the Yellow and Bohai Seas was investigated observationally and numerically. Almost all available observational data were used, including satellite imagery of Geostationary Operational Environmental Satellite (GOES)-9, three data sets from station observations at Dandong, Dalian and Qingdao, objectively reanalyzed data of final run analysis (FNL) issued by the National Center for Environmental Prediction (NCEP) and Regional Atmospheric Modeling System (RAMS) results. Synoptic conditions and fog characteristics were analyzed. The fog formed when warm,moist air was advected northwards over the cool water of the Yellow and Bohai Seas, and dissipated when a cold front brought northerly winds and cool, dry air. In order to better understand the fog formation mechanism, a high-resolution RAMS modeling with a 6km×6km grid, initialized and validated by FNL data, was designed. A 48h modeling that started from 12 UTC 26 March 2005reproduced the main characteristics of this sea fog event. The simulated lower visibility area agreed reasonably well with the sea fog region identified from the satellite imagery. Advection cooling effect seemed to play a significant role in the fog formation. |
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| Keywords: | sea fog the Yellow and Bohai Seas satellite imagery numerical modeling low visibility area |
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