The modification ofXandLband radar signals by monomolecular sea slicks
| Autor: | William J. Plant, William C. Keller, Werner Alpers, William D. Garrett, Franz Schlude, Dale L. Schuler, Philipp A. Lange, Heinrich Hühnerfuss, Aubrey Cross |
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| Rok vydání: | 1983 |
| Předmět: |
Atmospheric Science
Capillary wave L band Materials science Backscatter X band Soil Science Aquatic Science Oceanography Molecular physics Optics Geochemistry and Petrology Earth and Planetary Sciences (miscellaneous) Physics::Atmospheric and Oceanic Physics Earth-Surface Processes Water Science and Technology Ecology business.industry Attenuation Paleontology Forestry Racing slick Wind direction Geophysics Space and Planetary Science Surface wave business |
| Zdroj: | Journal of Geophysical Research: Oceans |
| ISSN: | 0148-0227 |
| DOI: | 10.1029/jc088ic14p09817 |
| Popis: | One methyl oleate and two oleyl alcohol surface films were produced on the surface of the North Sea under comparable oceanographic and meteorological conditions in order to investigate their influence on X and L band radar backscatter. Signals are backscattered in these bands primarily by surface waves with lengths of about 2 and 12 cm, respectively, and backscattered power levels in both bands were reduced by the slicks. The reduction was larger at X band than at L band, however, indicating that shorter waves are more intensely damped by the surface films. The oleyl alcohol film caused greater attenuation of short gravity waves than the film of methyl oleate, thus demonstrating the importance of the physicochemical properties of films on the damping of wind‐generated gravity capillary waves. Finally, these experiments indicate a distinct dependence of the degree of damping on the angle between wind and waves. Wind‐generated waves traveling in the wind direction are more intensely damped by surface films than are waves traveling at larger angles to the wind. |
| Databáze: | OpenAIRE |
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