On the measurement of directional wave spectra at the southern Brazilian coast

Alves, Jose-Henrique; Melo, Eloi

doi:10.1016/s0141-1187(99)00019-x

Cited by 11 publications

(14 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Details of the analysis techniques are beyond the scope of the present work. The interested reader is referred to Alves & Melo (1999) for a recent review of the subject.…”

Section: Wave Measurementsmentioning

confidence: 99%

See 1 more Smart Citation

Measurement and modeling of wind waves at the northern coast of Santa Catarina, Brazil

Alves

Melo

2001

Rev. Bras. Oceanogr.

View full text Add to dashboard Cite

Directional measurements of wind-wave spectra made during the year of 1996 are used in a preliminary investigation of the wind-wave climate and its transformation at the São Francisco do Sul island, northern coast of the Santa Catarina state. Four major sea states and associated meteorological conditions are identified through analyses of joint distributions of observed wave parameters. Transformations of these main sea-state patterns due to refraction and shoaling are investigated through a numerical modeling approach that allows the reconstruction of the wave field within extensive coastal areas, using single point measurements of the wave spectrum in shallow waters. Cross-validation of measured and reconstructed spectra at the study site yield consistent results, suggesting that the proposed methodology works well for the São Francisco do Sul coast.

show abstract

“…Details of the analysis techniques are beyond the scope of the present work. The interested reader is referred to Alves & Melo (1999) for a recent review of the subject.…”

Section: Wave Measurementsmentioning

confidence: 99%

“…In the previous equation, D(@) is a directional spreading function. In our study, D(@) is determined according to a model-free formulation described in details by Alves & Melo (1999).…”

Section: Wave Measurementsmentioning

confidence: 99%

Measurement and modeling of wind waves at the northern coast of Santa Catarina, Brazil

Alves

Melo

2001

Rev. Bras. Oceanogr.

View full text Add to dashboard Cite

show abstract

“…When bimodal seas are present, use of parametric methods of estimating the directional distribution function will result in the shortcoming inherent to programs. Modelfree methods such as maximum likelihood method (MLM), maximum entropy method (MEM) (Borgman, 1982), iterated maximum likelihood method (IMLM) (Pawka, 1983), extended maximum entropy method (EMEM) (Hashimoto et al, 1993) do not have such limitation because the estimate of directional spreading function at each individual frequency is independent of the rest of the spectrum and do not depend on a spreading parameter (Alves and Melo, 1999).…”

Section: Introductionmentioning

confidence: 99%

“…However, θ and ϕ corresponding to higher (> 0.25 Hz) and lower (< 0.07 Hz) frequencies are not similar. There have been very few studies on directional spreading of shallow water waves (Alves and Melo, 1999;Herbers et al, 1999;Kumar et al, 1999Kumar et al, , 2000Kumar, 2006; Published by Copernicus Publications on behalf of the European Geosciences Union.…”

Section: Introductionmentioning

confidence: 99%

Directionality and spread of shallow water waves along the eastern Arabian Sea

Kumar

Anoop

2013

Ann. Geophys.

View full text Add to dashboard Cite

Abstract. The directional characteristics of shallow water waves are described based on measured data during 2011 at two locations spaced at 350 km along the eastern Arabian Sea. Study shows that, for high swells (significant wave height > 1 m) approaching almost parallel to the coast, the difference between mean and principal wave direction at spectral peak is negligible. The directional spreading of wind-sea-dominated wave spectrum is less than that of the swell-dominated spectrum. Average value of the ratio of the directional width at twice the peak frequency and that at the peak frequency is 1.9 indicating that the directional width increased at higher frequency. Even though both locations studied are along the eastern Arabian Sea, there are more northwest waves due to shamal events and local winds found at the northern location (27 %) than at the southern location (7 %).

show abstract

“…The climate of surface ocean wave based on buoy measurements has been investigated in particular offshore regions, such as Campos Basin and Florianpolis, of the South Atlantic (SA) Ocean (Alves, 1999;Violante-Carvalho et al, 2002). However, to study the wave climate at oceanic scale, the use of numerical modelling, permitting broader studies, becomes necessary.…”

Section: Introductionmentioning

confidence: 99%

Ocean wave modes in the South Atlantic by a short-scale simulation

Parise

Farina

2012

Tellus A: Dynamic Meteorology and Oceanography

View full text Add to dashboard Cite

A B S T R A C TThe shortage of observational ocean wave data in the South Atlantic (SA) Ocean has resulted in numerical modelling becoming the most used tool for the investigation of wave climate in this oceanic region. In this article, the global model WAve Model (WAM) is used to simulate ocean waves in the SA from June 2006 to July 2007 with high time resolution. The four leading modes of the significant wave height, swell, wave peak period and surface wind velocity based on the empirical orthogonal functions (EOF) and singular value decomposition (SVD) methods are computed and analysed. The results show a number of specific characteristics present in the short-scale regime which emphasise and, in some cases, reduce some of the aspects of the global wave climate. The interaction between atmosphere and ocean has been found in several fields and modes that were examined. A relationship between tracks of extratropical cyclones are observed.

show abstract

On the measurement of directional wave spectra at the southern Brazilian coast

Cited by 11 publications

References 16 publications

Measurement and modeling of wind waves at the northern coast of Santa Catarina, Brazil

Measurement and modeling of wind waves at the northern coast of Santa Catarina, Brazil

Directionality and spread of shallow water waves along the eastern Arabian Sea

Ocean wave modes in the South Atlantic by a short-scale simulation

Contact Info

Product

Resources

About