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Robles-Diaz Lucia Ocampo-Torres Francisco J. Branger Hubert Garcia-Nava Hector Osuna Pedro Rascle Nicolas 《Ocean Dynamics》2021,71(10):981-992
Ocean Dynamics - A comprehensive analysis of the wavefield evolution under accelerated wind conditions provides an essential contribution to understanding the wind-wave generation process. A set of... 相似文献
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The existence of a transition in the slope of the wind-generated gravity wave spectrum from a f−4 to a f−5 power law, at a given frequency in the high frequency range, is examined. Evidence of its existence and of the non-uniqueness of the wave spectrum slope in the equilibrium range is presented. Furthermore, it is demonstrated that the statistical variability of the spectral estimates makes it difficult to obtain reliable results from limited sets of finite length wave records. 相似文献
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F. J. Ocampo-Torres H. García-Nava R. Durazo P. Osuna G. M. Díaz Méndez H. C. Graber 《Boundary-Layer Meteorology》2011,138(3):433-451
The Gulf of Tehuantepec air–sea interaction experiment (intOA) took place from February to April 2005, under the Programme for the Study of the Gulf of Tehuantepec (PEGoT, Spanish acronym
for Programa para el Estudio del Golfo de Tehuantepec). PEGoT is underway aiming for better knowledge of the effect of strong
and persistent offshore winds on coastal waters and their natural resources, as well as performing advanced numerical modelling
of the wave and surface current fields. One of the goals of the intOA experiment is to improve our knowledge on air–sea interaction processes with particular emphasis on the effect of surface
waves on the momentum flux for the characteristic and unique conditions that occur when strong Tehuano winds blow offshore against the Pacific Ocean long period swell. For the field campaign, an air–sea interaction spar (ASIS)
buoy was deployed in the Gulf of Tehuantepec to measure surface waves and the momentum flux between the ocean and the atmosphere.
High frequency radar systems (phase array type) were in operation from two coastal sites and three acoustic Doppler current
profilers were deployed near-shore. Synthetic aperture radar images were also acquired as part of the remote sensing component
of the experiment. The present paper provides the main results on the wave and wind fields, addressing the direct calculation
of the momentum flux and the drag coefficient, and gives an overview of the intOA experiment. Although the effect of swell has been described in recent studies, this is the first time for the very specific
conditions encountered, such as swell persistently opposing offshore winds and locally generated waves, to show a clear evidence
of the influence on the wind stress of the significant steepness of swell waves. 相似文献
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Lucía Gutiérrez-Loza Francisco J. Ocampo-Torres Héctor García-Nava 《Boundary-Layer Meteorology》2018,168(2):343-360
The influence of wave-associated parameters controlling turbulent \(\hbox {CO}_2\) fluxes through the air–sea interface is investigated in a coastal region. A full year of high-quality data of direct estimates of air–sea \(\hbox {CO}_2\) fluxes based on eddy-covariance measurements is presented. The study area located in Todos Santos Bay, Baja California, Mexico, is a net sink of \(\hbox {CO}_2\) with a mean flux of \(-1.3\, \upmu \hbox {mol m}^{-2}\hbox {s}^{-1}\) (\(-41.6\hbox { mol m}^{-2}\hbox {yr}^{-1}\)). The results of a quantile-regression analysis computed between the \(\hbox {CO}_2\) flux and, (1) wind speed, (2) significant wave height, (3) wave steepness, and (4) water temperature, suggest that the significant wave height is the most correlated parameter with the magnitude of the flux but the behaviour of the relation varies along the probability distribution function, with the slopes of the regression lines presenting both positive and negative values. These results imply that the presence of surface waves in coastal areas is the key factor that promotes the increase of the flux from and into the ocean. Further analysis suggests that the local characteristics of the aqueous and atmospheric layers might determine the direction of the flux. 相似文献
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