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  Measurements at 13.9 GHz of the radar backscattering cross section of the North Sea covered with an artificial surface film

Hühnerfuss, H., Alpers, W., & Jones, W. L. (1978). Measurements at 13.9 GHz of the radar backscattering cross section of the North Sea covered with an artificial surface film. Radio Science, 13, 979-983. doi:10.1029/RS013i006p00979.

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RS013i006p00979.pdf (Publisher version), 376KB
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Hühnerfuss, H.1, Author
Alpers, Werner2, 3, Author
Jones, W. L.4, Author
Affiliations:
1Institut für Organische Chemie und Biochemie, Universität Hamburg, ou_persistent22              
2Institut für Geophysik, Universität Hamburg, ou_persistent22              
3MPI for Meteorology, Max Planck Society, Bundesstraße 53, 20146 Hamburg, DE, ou_913545              
4External Organizations, ou_persistent22              

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 Abstract: The reduction of the Ku‐band (13.9 GHz) normalized radar cross section (NRCS) by an artificial monomolecular surface film (oleyl alcohol) on the sea surface was measured in the North Sea during the 1975 Joint North Sea Wave Project, JONSWAP 75 experiment. The aim of the surface film experiment was to simulate natural surface films which often occur on the ocean surface and are produced by plankton or fish. NRCS measurements were obtained from an aircraft at incidence angles of 41° and 47° at vertical and horizontal polarizations. For winds between 3.5 and 4.4 m/sec the maximum measured reduction was 7.3 ± 3.5 dB relative to the mean. In‐situ measurements showed that the oleyl alcohol film reduced the surface tension from 74 to 43 dyne/cm. Similar reductions in surface tension have also been measured on the ocean due to natural surface films of biological origin. It is noted that variations of the NRCS due to natural surface film effects may significantly limit the techniques used currently to infer surface wind vector over biologically active ocean regions.

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Language(s): eng - English
 Dates: 1978
 Publication Status: Issued
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 Rev. Type: Peer
 Identifiers: ISI: A1978GD37400008
DOI: 10.1029/RS013i006p00979
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Title: Radio Science
Source Genre: Journal
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Publ. Info: Washington : American Geophysical Union
Pages: - Volume / Issue: 13 Sequence Number: - Start / End Page: 979 - 983 Identifier: ISSN: 0048-6604
CoNE: https://pure.mpg.de/cone/journals/resource/954925456999