The Application of Monitoring Sea Fog in Taiwan Strait Using MODIS Remote Sensing Data

Zhang Chungui; Cai Yiyong; Zhang Jiachun

Vol.20, NO.1, 2009

Article Contents

Article Navigation > Journal of Applied Meteorological Science > 2009 > 20(1): 8-16

Zhang Chungui, Cai Yiyong, Zhang Jiachun. The application of monitoring sea fog in Taiwan strait using MODIS remote sensing data. J Appl Meteor Sci, 2009, 20(1): 8-16.

Citation:

Zhang Chungui, Cai Yiyong, Zhang Jiachun. The application of monitoring sea fog in Taiwan strait using MODIS remote sensing data. J Appl Meteor Sci, 2009, 20(1): 8-16.

Zhang Chungui, Cai Yiyong, Zhang Jiachun. The application of monitoring sea fog in Taiwan strait using MODIS remote sensing data. J Appl Meteor Sci, 2009, 20(1): 8-16.

Citation:

Zhang Chungui, Cai Yiyong, Zhang Jiachun. The application of monitoring sea fog in Taiwan strait using MODIS remote sensing data. J Appl Meteor Sci, 2009, 20(1): 8-16.

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The Application of Monitoring Sea Fog in Taiwan Strait Using MODIS Remote Sensing Data

1.
Fujian Provincial Meteorological Institute, Fuzhou 350001
2.
Quanzhou Meteorological Bureau, Fujian Province, Quanzhou 362000

Received Date: 2008-02-19
Rev Recd Date: 2008-08-26
Publish Date: 2009-02-28

Abstract

Abstract

The sea fog is a frequent severe weather phenomenon, there are many advantages in monitoring the temporal and spatial change of sea fog using remote sensing technology. The visible light channel data and infrared channel data of new MODIS sensors are used to identify and monitor sea fog in Taiwan Strait. Spectrum radiation characteristics of MODIS data on various earth surface, such as ocean, middle-high-level cloud, low-level cloud and sea fog are analyzed, the results show that there are notable spectrum radiation characteristics differences between the sea fog, low-level cloud and ocean, middle-high-level cloud in the Taiwan Strait region.There are also notable spectrum radiation characteristics distinguish in some channels of visible light and middle infrared bands between sea fog and low-level cloud. On the basis of results, the MODIS channels which are sensitive to sea fog are chosen, and the sea fog remote sensing monitoring model in Taiwan Strait region is established by using compositive method, meanwhile the channels combination and digital monitoring indexes which are fit for the sea fog in Taiwan Strait region are validated.The sea fog events in Taiwan Strait region during 2004-2007 are monitored by using the model which has been established, and the sea fog monitoring results are verified and analyzed using the visibility data measured in five meteorological observing stations in Fujian coastal region.The results show that the veracity of sea fog monitoring model is 83.3 % in the mass, and the monitoring model veracity of strong sea fog is better than that of weak sea fog. The monitoring model veracity of night sea fog is relatively low because there are fewer remote sensing channels in the night on MODIS. After the inconsistent samples between remote sensing monitoring and meteorological observing are analyzed, the result shows that the existence of multi-layer cloud has notable influence to the veracity of sea fog. Research result shows:In the view of the sea fog monitoring results which are verified and analyzed between meteorological observing and remote sensing monitoring, the sea fog remote sensing monitoring model in Taiwan Strait region which is established using MODIS data can reasonably describe the distribution status of sea fog, and can dynamically monitor the distribution and developing process of sea fog, the model is very suitable to apply in the future operational work. But because the fog and cloud remote sensing monitoring is very complex, the variety of digital monitoring indexes of sea fog must be noticed in the practical operational work.
- remote sensing;
- sea fog;
- TaiwanS trait;
- MODIS

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References(21)

Figures and Tables

图 1 MODIS卫星影像中海雾区和云区的不同纹理特征

(a) 2007年5月24日, (b)2007年1月12日

Fig. 1 The different texture characteristic of sea fog and cloud in MODIS images

on May 24, 2007 (a) and January 12, 2007(b)

DownLoad: Full-Size Img PowerPoint

图 2 不同下垫面在MODIS探测通道的反射特性

Fig. 2 The reflect characteristic of different earth surface on MODIS channels

DownLoad: Full-Size Img PowerPoint

图 3 不同下垫面在MODIS探测通道的辐射特性

Fig. 3 The radiation characteristic of different earth surface on MODIS channels

DownLoad: Full-Size Img PowerPoint

图 4 台湾海峡海雾MODIS卫星遥感监测流程图

Fig. 4 The flowchart of sea fog monitoring in Taiwan Strait using MODIS data

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图 5 台湾海峡海雾MODIS卫星遥感监测结果

Fig. 5 The images of sea fog monitoring in Taiwan Strait using MODIS data

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图 6 2004年2月19-20日厦门海域海雾MODIS遥感动态监测结果

Fig. 6 The images of fog MODIS dynamic monitoring in Xiamen sea during February 19-20, 2004

DownLoad: Full-Size Img PowerPoint

表 1 台湾海峡海雾MODIS遥感监测与地面观测对比验证结果

Table 1 The validation of sea fog MODIS monitoring in Taiwan Strait by meteorology observation data

表 2 台湾海峡海雾MODIS遥感监测准确率统计结果(单位:%)

Table 2 The statistical results of sea fog monitoring precision in Taiwan Strait using MODIS data (unit:%)

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