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| The characteristics of sea fog with different airflow over the Huanghai Sea in boreal spring | |
| 作者姓名： | HUANG Jian WANG Xin ZHOU Wen HUANG Huijun WANG Dongxiao ZHOU Faxiu |
| 作者单位： | HUANG Jian,HUANG Huijun(Institute of Tropical and Marine Meteorology,China Meteorological Administration,Guangzhou 510080,China);WANG Xin,ZHOU Wen(Guy Carpenter Asia-Pacific Climate Impact Centre,School of Energy and Environment,City University of Hong Kong,Hong Kong,China);WANG Dongxiao(CAS key laboratory of tropical marine environmental dynamics,South China Sea Institute of Oceanology,Chinese Academy of Sciences,Guangzhou 510301,China);ZHOU Faxiu(Department of meteorology,Ocean University of China,Qingdao 262003,China) |
| 基金项目： | This work was supported in part by the National Natural Science Foundation of China under contract Nos 40675013 and 40906010; the China Meteorological Administration project for popularizing new techniques under contract No. CMATG2007M23; the scientific and technological planning project from Guangdong Province under contract No. 2006B37202005. The work of Wang Xin is supported by City University of Hong Kong Research Scholarship Enhancement Scheme and the City University of Hong Kong Strategic Research Grants 7002329. |
| 摘 要： | Using the observations from ICOADS datasets and contemporaneous NCEP/NCAR reanalysis datasets during 1960-2002, the study classifies the airflows in favor of sea fog over the Huanghai (Yellow) Sea in boreal spring (April-May) with the method of trajectory analysis, and analyzes the changes of proportions of warm and cold sea fogs along different paths of airflow. According to the heat balance equation, we investigate the relationships between the marine meteorological conditions and the proportion of warm and cold sea fog along different airflow paths. The major results are summarized as follows. (1) Sea fogs over the Huanghai Sea in spring are not only warm fog but also cold fog. The proportion of warm fog only accounts for 44% in April, while increases as high as 57% in May. (2) Four primary airflow paths leading to spring sea fog are identified. They are originated from the northwest, east, southeast and southwest of the Huanghai Sea, respectively. The occurrence ratios of the warm sea fog along the east and southeast airflow paths are high of 55% and 70%, while these along the southwest and northwest airflow paths are merely 17.9% and 50%. (3) The key physical processes governing the warm/cold sea fog are heat advection transport, longwave radiation cooling at fog top, solar shortwave warming and latent heat flux between airsea interfaces. (4) The characteristics of sea fog along the four airflow paths relate closely to the conditions of water vapor advection, and the vertical distribution of relative humidity. |
| 关 键 词： | 黄海海域 海雾 气流 北方 比例关系 轨迹分析法 热平衡方程 NCEP |
| 收稿时间： | 27 April 2007 |
| 修稿时间： | 2009/12/4 0:00:00 |
The characteristics of sea fog with different airflow over the Huanghai Sea in boreal spring |
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| HUANG Jian,WANG Xin,ZHOU Wen,HUANG Huijun,WANG Dongxiao,ZHOU Faxiu.The characteristics of sea fog with different airflow over the Huanghai Sea in boreal spring[J].Acta Oceanologica Sinica,2010,29(4):3-12. | |
| Authors: | HUANG Jian WANG Xin ZHOU Wen HUANG Huijun WANG Dongxiao and ZHOU Faxiu |
| Institution: | 1. Institute of Tropical and Marine Meteorology,China Meteorological Administration,Guangzhou 510080,China 2. Guy Carpenter Asia-Pacific Climate Impact Centre,School of Energy and Environment,City University of Hong Kong,Hong Kong,China 3. CAS key laboratory of tropical marine environmental dynamics,South China Sea Institute of Oceanology,Chinese Academy of Sciences,Guangzhou 510301,China 4. Department of meteorology,Ocean University of China,Qingdao 262003,China |
| Abstract: | Using the observations from ICOADS datasets and contemporaneous NCEP/NCAR reanalysis datasets during 1960-2002, the study classifies the airflows in favor of sea fog over the Huanghai (Yellow) Sea in boreal spring (April-May) with the method of trajectory analysis, and analyzes the changes of proportions of warm and cold sea fogs along different paths of airflow. According to the heat balance equation, we investigate the relationships between the marine meteorological conditions and the proportion of warm and cold sea fog along different airflow paths. The major results are summarized as follows. (1) Sea fogs over the Huanghai Sea in spring are not only warm fog but also cold fog. The proportion of warm fog only accounts for 44% in April, while increases as high as 57% in May. (2) Four primary airflow paths leading to spring sea fog are identified. They are originated from the northwest, east, southeast and southwest of the Huanghai Sea, respectively. The occurrence ratios of the warm sea fog along the east and southeast airflow paths are high of 55% and 70%, while these along the southwest and northwest airflow paths are merely 17.9% and 50%. (3) The key physical processes governing the warm/cold sea fog are heat advection transport, longwave radiation cooling at fog top, solar shortwave warming and latent heat flux between airsea interfaces. (4) The characteristics of sea fog along the four airflow paths relate closely to the conditions of water vapor advection, and the vertical distribution of relative humidity. |
| Keywords: | spring sea fog over the Huanghai Sea airflow paths water vapor flux heat advection vertical distribution of water vapor |
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