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《Periodical of Ocean University of China》 2017-12
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A Method for Sea Fog Detection Using CALIOP Data

ZHAO Jing-Cong;WU Dong;ZHAO Yao-Tian;College of Information Scienceand Engineering,Ocean University of China;Laboratory for Regional Oceanography and Numerical Modeling,Qingdao National Laboratory for Marine Science and Technology;  
A method for sea fog detection using the measurement data acquired by the Cloud-Aerosol Lidar with Orthogonal Polarization(CALIOP)aboard the Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observation(CALIPSO)satellite is proposed in this paper.The characteristics of the backscattersoflow clouds and low aerosols under two different conditions were analyzed.The statistics of 3 bins below cloud top expresse the real characteristics of backscatters preferably.However,there is no difference for aerosol under the two conditions.Then the characteristic of backscatter for misjudgedsea surface is analyzed and compared with cloud and aerosol.It makes out that the misjudged sea surface is a kind of cloud whose base is attached with sea surface.Summarily the misjudged sea surface is sea fog.In order to verify this conclusion,extinction coefficient and visibility of sea surface which is misjudged were retrieved.It turned out that only 1.95 percent of visibility is greater than 1 kilometer and most of visibility is less than0.3 kilometer.So it reachesa conclusion that the misjudged sea surface is sea fog.The method of sea fog detection proposed in this paper has enriched the way to detect sea fog and made a difference on researching characteristics of sea fog.
【Fund】: 国家自然科学基金项目(41376180)资助~~
【CateGory Index】: P714.2
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