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Open AccessJournal ArticleDOI

Superimposition of wind seas on pre-existing swells off Goa coast

TLDR
In this article, an analysis of wind and wave data collected in the coastal region of Goa, west coast of India, during fair weather season reveals a distinct and systematic diurnal variation in wind speed, wave height, and wave period, especially simultaneous increase in wave height and decrease in wave period with increase in local wind speeds due to sea breeze system.
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This article is published in Journal of Marine Systems.The article was published on 2011-07-01 and is currently open access. It has received 46 citations till now. The article focuses on the topics: Swell & Sea breeze.

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Citations
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Journal ArticleDOI

Influence of winds on temporally varying short and long period gravity waves in the near shore regions of the eastern Arabian Sea

TL;DR: In this article, the role of sea breeze on the sea state during pre- and postmonsoon seasons is studied and it is found that the maximum wave height is observed at 15:00 UTC during the pre-soon season, with an estimated difference in time lag of 1-2 h in maximum peak period between premonsoon and post-soon seasons.
Journal ArticleDOI

Contribution of Southern Indian Ocean swells on the wave heights in the Northern Indian Ocean—A modeling study

TL;DR: In this article, the third generation ocean wave model, MIKE 21 SW, is implemented and validated to simulate wave heights for the period starting from September 2008 to August 2009 for the Indian seas Simulations were carried out by modifying the analyzed winds over the model domain (30°E-120°E and 60°S-30°N).
Journal ArticleDOI

On the dominance of pre-existing swells over wind seas along the west coast of India

TL;DR: In this article, wave data collected off Goa along the west coast of India during February 1996-May 1997 has been subjected to spectral analysis, and swell and wind sea parameters have been estimated by separation frequency method.
Journal ArticleDOI

Wave climate in the Arkona Basin, the Baltic Sea

TL;DR: In this paper, the basic features of the wave climate in the Southwestern Baltic Sea (such as the average and typical wave conditions, frequency of occurrence of different wave parameters, variations in wave heights from weekly to decadal scales) are established based on waverider measurements at the Darss Sill in 1991-2010.
Journal ArticleDOI

Performance Assessment of ERA5 Wave Data in a Swell Dominated Region

TL;DR: In this paper, a performance assessment of the ERA5 wave dataset in an ocean basin where local wind waves superimpose on swell waves is presented, based on observed wave data collected during a coastal experimental campaign carried out offshore of the southern Oman coast in the Western Arabian Sea.
References
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Journal ArticleDOI

The NCEP/NCAR 40-Year Reanalysis Project

TL;DR: The NCEP/NCAR 40-yr reanalysis uses a frozen state-of-the-art global data assimilation system and a database as complete as possible, except that the horizontal resolution is T62 (about 210 km) as discussed by the authors.
Book

Dynamics and Modelling of Ocean Waves

TL;DR: The Wave Modelling Group (WAM) model as mentioned in this paper is based on a detailed physical description of air/sea interactions and is widely used for wave forecasting for meteorological and oceanographic purposes.
Book

Sea Breeze and Local Winds

J. E. Simpson
TL;DR: In this article, field measurements of the sea-breeze have been used to identify the formation of a sea breeze front and its interaction with the air quality and air quality.
Book

Wind Generated Ocean Waves

Ian R. Young
TL;DR: In this paper, the authors introduce wave theory, wave transformation limitations of linear wave theory and dimensionless scaling growth curves for energy and peak frequency one-dimensional spectrum directional spreading, and finite depth effects.
Journal ArticleDOI

Evaluation of Wind Vectors Observed by QuikSCAT/SeaWinds Using Ocean Buoy Data

TL;DR: In this paper, the QuikSCAT/SeaWinds satellite data were validated by comparing with wind and wave data from ocean buoys, and the effects of oceanographic and atmospheric environment on scatterometer measurements were also assessed using the buoy data.
Related Papers (5)
Frequently Asked Questions (12)
Q1. What are the contributions mentioned in the paper "Superimposition of wind seas on pre-existing swells off goa coast" ?

In this paper, an analysis of wind and wave data collected in the coastal region of Goa, west coast of India, during fair weather season reveals a distinct and systematic diurnal variation in wind speed, wave height, and wave period, especially simultaneous increase in wave height and decrease in wave period with increase in local wind speeds due to sea breeze system. 

A more scientifically relevant problem is the use of the local conditions to study the influence of swell on the local wind generation. 

During the summer season (October – April) they observed that the sea breeze is most prevalent between 12 and 21 h (local time), and typically produces 1 – 1.5 m high waves with periods ranging between 6 and 9 s. Masselink and Pattiaratchi (1998) pointed out that following the onset of sea breeze, addition of locally generated wind waves to background swell resulted in an increase in wave height and a decrease in mean wave period. 

The present study aims at (i) understanding the diurnal variation of wave parameters along and off the coast of the Goa region and (ii) studying the impact of sea breeze on the local wave climate. 

Shipping Corporation of India has initiated a program for the Goa coast, where the Mormugao Port Trust is situated, to fix an Inland Vessel Limit (IVL) for the movement of vessels such as barges and boats based on a maximum wave height of 2 m. 

Sea breeze can create a highly dynamic environment in the nearshore regions, and beaches may respond rapidly to the changing wind wave climate. 

The model wave parameters give correlation coefficients of 0.77, 0.72 and 0.63 for total, swell and wind sea heights, respectively with the measurements. 

the AWS winds were measured on the land (of course, close to the coast) and the magnitudes (especially uvelocity) are significantly low compared to the NCEP winds of the grid closest to the coast (Figure 5), the AWS winds were not used for wave simulations. 

Although relatively mild, the cross sea conditions will have a considerable impact on the local maritime activities and harbour management. 

The sea breeze and land breeze systems are nearly perpendicular to each other, the former roughly parallel and the latter perpendicular to the orientation of the Goa coast. 

These winds have been used by Vethamony et al. (2006) to simulate waves in the north Indian Ocean, and the modelled wave parameters match reasonably well with measurements. 

(Figure 5)Winds from the AWS for the coastal region off Goa show nearly semi-diurnal variations both in their magnitude and direction (Figure 2).