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The discrimination between crude-oil spills and monomolecular sea slicks by an airborne lidar

 

作者: HEINRICH HOüNERFUSS,   WILLIAM D. GARRETT,   FRANK E. HOGE,  

 

期刊: International Journal of Remote Sensing  (Taylor Available online 1986)
卷期: Volume 7, issue 1  

页码: 137-150

 

ISSN:0143-1161

 

年代: 1986

 

DOI:10.1080/01431168608954666

 

出版商: Taylor & Francis Group

 

数据来源: Taylor

 

摘要:

Airborne lidar measurements were performed over a deployed mono-molecular oleyl alcohol surface film (‘slick’), the physicochemical characteristics of which are known to be similar to biogenic organic compounds secreted by plankton and fish, and adjacent ‘clean’ sea surfaces in the North Sea. In the presence of the slick,the suppression of the Raman backscatter at 381 nmand of two spectral bands indicative of water column fluorescent organic material at 414 and 482 nm were observed. This effect is explained by two possible mechanisms giving rise to a modification of the transmission or coupling of the laser beam into the water column: (i) the damping of capillary and short gravity water waves by the oleyl alcohol slick, and (ii) the modification of the uppermost water layer by the oleyl alcohol film. The results obtained in the presenceof a slick are compared with data measured over a Murban crude-oil spill with the same lidar system off the coast of the U.S.A. The consequences of the lidar-monomolecular film experiments with regard to the remote detection of crude-oil spills and oil-thickness measurements with an airborne laser fluorosensing system will be discussed.

 

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