منابع مشابه
Primordial oil slick.
Calculations and some preliminary experiments suggest that an early methane atmosphere would have been polymerized by solar ultraviolet radiation in geologically short periods of time. An oil slick 1 to 10 meters thick could have been produced in this way and might well have been of considerable importance in the development of life.
متن کاملTowards Oil Slick Monitoring in the Arctic Environment
We investigate the potential of multi-polarization and multi-frequency SAR systems to discriminate oil-in-sea-ice mixtures from newly frozen and young sea ice. The dielectric properties of oil emulsions, for a range of oil volume fractions, and theoretical co-polarization ratios for relevant media are modeled and discussed. We also compare the co-polarization ratios computed from actual detecte...
متن کاملImproved Oil Slick Detection and Classification with Polarimetric Sar
A study on the potential of space-borne polarimetric synthetic aperture radar (SAR) imagery for an improved detection and classification of oil spills is presented. An image data set consisting of five SIR-C/X-SAR acquisitions over the North Sea, English Channel, and Southern Italy is used. Results show that two land surface roughness indicators (i.e., the circular polarization coherence (CPC) ...
متن کاملFully Polarimetric Sar Data for Oil Slick Observation
In this study a fully polarimetric electromagnetic model for sea surface Mueller matrix is exploited, under low to moderate wind conditions, to design and experiment a Synthetic Aperture Radar (SAR) oil slick filter. The latter is simple and computer time effective. Experiments, accomplished over C-band Multi Look Complex (MLC) SIR-C/X-SAR data and L-band Single Look Complex (SLC) ALOS PalSAR d...
متن کاملMultiscale Oil Slick Segmentation with Markov Chain Model
A Markov chain model is applied for the segmentation of oil slicks acquired by SAR sensors. Actually, oil slicks have specific impact on ocean wave spectra. Initial wave spectra may be characterized by three kinds of waves, big, medium and small, which correspond physically to gravity and gravitycapillary waves. The increase of viscosity due to the presence of oil damps gravity-capillary waves....
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ژورنال
عنوان ژورنال: Nature
سال: 1990
ISSN: 0028-0836,1476-4687
DOI: 10.1038/343107a0