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Titolo:
Air-sea interaction processes at light winds observed from a coastal tower
Autore:
Savtchenko, A; Tang, S; Barber, R; Wu, J;
Indirizzi:
UnivSAiami, Rosenstiel Sch Marine & Atmospher Sci, CIMAS, Miami, FL 33149 U Univ Miami Miami FL USA 33149 e & Atmospher Sci, CIMAS, Miami, FL 33149 U Santa Clara Univ, Dept Phys, Santa Clara, CA 95053 USA Santa Clara Univ Santa Clara CA USA 95053 Phys, Santa Clara, CA 95053 USA Natl Cheng Kung Univ, Inst Hydraul & Ocean Engn, Tainan 70101, Taiwan NatlCheng Kung Univ Tainan Taiwan 70101 cean Engn, Tainan 70101, Taiwan
Titolo Testata:
JOURNAL OF COASTAL RESEARCH
fascicolo: 2, volume: 15, anno: 1999,
pagine: 444 - 456
SICI:
0749-0208(199921)15:2<444:AIPALW>2.0.ZU;2-1
Fonte:
ISI
Lingua:
ENG
Soggetto:
TURBULENT BOUNDARY-LAYER; WATER-WAVES; MODULATION; BREAKING; SPECTRA;
Keywords:
turbulence; intermittence; wind waves; radar return;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
24
Recensione:
Indirizzi per estratti:
Indirizzo: Savtchenko, A Univ Miami, Rosenstiel Sch Marine & Atmospher Sci, CIMAS, 4600 Rickenbacker Univ Miami 4600 Rickenbacker Causeway Miami FL USA 33149 ker
Citazione:
A. Savtchenko et al., "Air-sea interaction processes at light winds observed from a coastal tower", J COAST RES, 15(2), 1999, pp. 444-456

Abstract

Airflows, sea-surface waves, near-surface currents and X-band radar sea-returns were measured from a nearshore tower in 4-m deep water located in theDelaware Bay, during the passage of typical weather patterns. Intermittentviolent momentum transfers, burstings, from air to water were clearly observed from measurements of the airflow turbulence. The scaling of mean periods between bursts and between sweeps with dominant wave period and the outer and inner variables of the turbulent airflow confirms that both, dominantwind waves and energy containing airflow eddies, share a role in the triggering of burstings. The three-dimensionality of the airflow in the field facilitates the reattachment manifested by the sweep events, and makes the latter similar to the bursts in terms of number and contribution to the mean Reynolds stress. The contribution of bursting events to the mean Reynolds stress is stronger than in laboratory flows and exceeds 100%. Wavelet analysis was applied to the surface wave data, and revealed uniformly distributedinstants of bursts and sweeps over dominant wind wave profile. Using surface elevations and radar return data, no modifications of the surface roughness were found during bursting events.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 02/04/20 alle ore 19:24:47