| GAO Shanhong,WU Wei,ZHU Leilei,FU Gang,HUANG Bin. 2009. Detection of nighttime sea fog/stratus over the Huanghai Sea using MTSAT-1R IR data. Acta Oceanologica Sinica, (2):23－35 |
| Detection of nighttime sea fog/stratus over the Huanghai Sea using MTSAT-1R IR data |
| Detection of nighttime sea fog/stratus over the Huanghai Sea using MTSAT-1R IR data |
| Received:March 25, 2008 Revised:June 16, 2008 |
| DOI： |
| Key words:Huanghai Sea nighttime sea fog MTSAT-1R dual channel difference method |
| 中文关键词: Huanghai Sea nighttime sea fog MTSAT-1R dual channel difference method |
| 基金项目:The National Natural Science Foundation of China under contract No. 40706004, the National Basic Research Program ("973" program) of China under contract No. 2005CB422301; China Meteorological Administration's New Technology Extension Project under contract No. CMATG2008M41; the National Special Fund for public Sector Research of China under contract No. GYHY200706031, Shandong Provincial Meteorological Bureau Science Fund of China under contract No. 2004SDQXJ01. |
| Author Name | Affiliation | E-mail | | GAO Shanhong | Physical Oceanography Laboratory, Ocean University of China, Qingdao 266003, China | gaosh@ouc.edu.cn | | WU Wei | Physical Oceanography Laboratory, Ocean University of China, Qingdao 266003, China
Shandong Provincial Meteorological Institute, Jinan 250031, China | | | ZHU Leilei | Physical Oceanography Laboratory, Ocean University of China, Qingdao 266003, China | | | FU Gang | Physical Oceanography Laboratory, Ocean University of China, Qingdao 266003, China | | | HUANG Bin | National Meteorological Center, China Meteorological Administration, Beijing 100081, China | |
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| Abstract: |
| A dual channel difference (DCD) method is applied to detect nighttime sea fog/stratus over the Huanghai Sea using the infrared (IR) data of shortwave (3.5-4.0 μm) and longwave (10.3-11.3 μm) channels from the Multi-functional Transport Satellite (MTSAT)-1R, i.e., shortwave minus longwave brightness temperature difference (SLTD). Twenty-four sea fog events over the Huanghai Sea during March to July of 2006 and 2007 are chosen to determine a suitable value of SLTD for nighttime sea fog/stratus detection, and it is found that the value of -5.5-2.5℃ can be taken as a criterion. Two case examples of sea fog events are especially demonstrated in detail utilizing the criterion, and the results show that the derived sea fog/stratus coverage is quite reasonable. This coverage information is very helpful to analyze the formation and evolution of sea fog/stratus during night and can provide sea fog researchers with observational evidences for model results verification. However, more efforts are needed to further obtain vertical extent information of sea fog/stratus and attempt to discriminate between sea fog and stratus. |
| 中文摘要: |
| A dual channel difference (DCD) method is applied to detect nighttime sea fog/stratus over the Huanghai Sea using the infrared (IR) data of shortwave (3.5-4.0 μm) and longwave (10.3-11.3 μm) channels from the Multi-functional Transport Satellite (MTSAT)-1R, i.e., shortwave minus longwave brightness temperature difference (SLTD). Twenty-four sea fog events over the Huanghai Sea during March to July of 2006 and 2007 are chosen to determine a suitable value of SLTD for nighttime sea fog/stratus detection, and it is found that the value of -5.5-2.5℃ can be taken as a criterion. Two case examples of sea fog events are especially demonstrated in detail utilizing the criterion, and the results show that the derived sea fog/stratus coverage is quite reasonable. This coverage information is very helpful to analyze the formation and evolution of sea fog/stratus during night and can provide sea fog researchers with observational evidences for model results verification. However, more efforts are needed to further obtain vertical extent information of sea fog/stratus and attempt to discriminate between sea fog and stratus. |
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