نتایج جستجو برای: wind wave

تعداد نتایج: 296462  

2000
J. Gourrion D. Vandemark S. Bailey B. Chapron

A large global compilation of altimeter and scatterometer satellite crossover samples is used to address altimeter wind speed inversion. The emphasis here is altimeter wind error due to sea state impacts. Numerous past studies have suggested that long-scale gravity waves, which do not adjust to wind as quickly as the short gravity-capillary waves, have a measurable influence on interpretation o...

2017
D. B. Simkhada J. B. Snively Michael J. Taylor S. J. Franke M. J. Taylor

Short-period gravity waves of especially-small horizontal scale have been observed in the Maui, Hawaii airglow. Typical small-scale gravity wave events have been investigated, and intrinsic wave propagation characteristics have been calculated from simultaneous meteor radar wind measurements. Here we report specific cases where wave structure is significantly determined by the local wind struct...

2001
NAOTO EBUCHI

By using wind vector fields observed by the NASA Scatterometer (NSCAT) and significant wave heights observed by the TOPEX/POSEIDON and European Remote Sensing Satellite-2 (ERS-2) altimeters, one-dimensional fetch growth of wind waves has been investigated under conditions of strong wind and high waves caused by the East Asian winter monsoon in the Sea of Japan. The evolution of fetch-limited wi...

2007
A. T. Y. LuI

Analysis of previously reported observations of the solar wind-barium interaction associated with the AMPTE artificial comet release of December 27, 1984, is presented. On the basis of these results we argue that the solar wind couples momentum (and energy) to the barium ions through both laminar and turbulent processes. The laminar forces acting on the particles are the laminar electric and ma...

A. Aziminejad H. Zare Banadkooki, M. R. Akbarpour jannat S. Mazaheri

It is proposed to use a single base platform in the Persian Gulf considering its low depth and more appropriate environmental conditions in comparison to North Sea and Mexico Gulf where this kind of platform is very popular. The pile of platform is responsible for transmission of environmental loads resulted from waves, currents, wind and dead loads to foundation of platform. Using SACS 5.3 sof...

M Feyzollahzadeh M.J Mahmoodi,

In this paper, an analytical method for vibrations analysis of offshore wind turbine towers with fixed monopile platform is presented. For this purpose, various and the most general models including CS, DS and AF models are used for modeling of wind turbine foundation and axial force is modeled as a variable force as well. The required equations for determination of wind turbine tower response ...

2016
Stefan Balluff Jörg Bendfeld

Renewable energy concepts are able to sustainably satisfy the world energy demand without any restrictions for the following generations. In these concepts the wind energy and wave/ocean current energy are important factors as the description and the prognosis of waves and currents is a complex issue, especially offshore. For the estimation of the average annual wind speed and thus the energy p...

2008
Shaohua George Chen Isamu Fukuda Petro Babak Thomas Hillen Shaohua Chen Alina Chertock Philip Rosenau

Wind is one of the main forces affecting the rate of forest fire spread. It may either increase or decrease the energy transferred toward the unburned areas. The present study is devoted to understanding the effect of wind on the propagation of forest fires. To model the propagation of forest fires a semiphysical approach is used. By this approach forest fire is considered as an adiabatic combu...

ژورنال: مهندسی دریا 2009
اردلان صمغی, حسین, محجوبی, جواد,

Prediction of wave parameters is necessary for many applications in coastal and offshore engineering. In the literature, several approaches have been proposed to wave predictions classified as empirical based, soft-computing based and numerical based approaches. Recently, soft computing techniques such as Artificial Neural Networks (ANNs) have been used to develop wave prediction models. In thi...

2003
MICHAEL E. McINTYRE Michael E. McIntyre

From research on stratospheric dynamics there has emerged what might prove to be some useful fresh ideas about the problem of water-wave generation by wind. As pointed out in an earlier contribution (1993), water waves can be systematically amplified by two irreversible, ratchet-like mechanisms that depend on spatio-temporal inhomogeneities, such as wind gustiness and wave groupiness. Neither m...

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