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Titolo:
EFFECTS OF SURFACTANT ON THE GROWTH OF WIND-WAVES - SIMULTANEOUS OBSERVATIONS WITH OPTICAL AND MICROWAVE SENSORS
Autore:
SAVTCHENKO A; TANG S; WU J;
Indirizzi:
UNIV DELAWARE,GRAD COLL MARINE STUDIES,AIR SEA INTERACT LAB LEWES DE 19958 NATL CHENG KUNG UNIV,INST HYDRAUL & OCEAN ENGN TAINAN 70101 TAIWAN
Titolo Testata:
Journal of marine systems
fascicolo: 1-4, volume: 13, anno: 1997,
pagine: 273 - 282
SICI:
0924-7963(1997)13:1-4<273:EOSOTG>2.0.ZU;2-P
Fonte:
ISI
Lingua:
ENG
Soggetto:
ATMOSPHERIC STABILITY; NATURAL FILMS; SEA-SURFACE; OIL FILMS; DEPENDENCE; SUPPRESSION; SCATTERING; RIPPLES;
Keywords:
SURFACE WAVES; SURFACTANT; RADAR RETURN;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
22
Recensione:
Indirizzi per estratti:
Citazione:
A. Savtchenko et al., "EFFECTS OF SURFACTANT ON THE GROWTH OF WIND-WAVES - SIMULTANEOUS OBSERVATIONS WITH OPTICAL AND MICROWAVE SENSORS", Journal of marine systems, 13(1-4), 1997, pp. 273-282

Abstract

The growth of wind waves was investigated in a circulating tank over slick and ''clean'' surfaces. The slick surface was produced through the aging of seawater, and the ''clean'' surface was obtained by overflowing. Water-surface slopes and microwave backscattering were simultaneously measured with an optical slope gauge and a continuous-wave radar, respectively. Dependencies of the mean-square slope and the radar backscattered power on the wind-friction velocity over these two surfaces were found to be different. A delayed growth of ripples over the slick surface was identified from optical and microwave measurements. The suppression of ripples by surface slicks was most significant at lowwinds up to the wind-friction velocity of 15 cm s(-1). A reduction of-18 dB in the mean-square slope is found at the wind-friction velocity of 11 cm s(-1). The exponent of power-law dependence of radar cross section on wind-friction velocity over the slick surface was much larger than that over the ''clean'' surface. The radar backscattering fromthe slick surface was reduced by -40 dB at light winds and saturated at high winds with the wind-friction velocities smaller than 11 cm s(-1) and larger than 24 cm s(-1), respectively.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 05/04/20 alle ore 13:40:13