TITLE

A Variational Assimilation System for Nearshore Wave Modeling

AUTHOR(S)
Orzech, Mark D.; Veeramony, Jayaram; Ngodock, Hans
PUB. DATE
May 2013
SOURCE
Journal of Atmospheric & Oceanic Technology;May2013, Vol. 30 Issue 5, p953
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
A variational data assimilation system is developed for the stationary, homogeneous portion of the wave model Simulating Waves Nearshore (SWAN). The system is based on a numerical adjoint constructed for the discrete forward SWAN code; its performance is compared to that of an earlier system based on a discretized analytical adjoint (Walker; Veeramony et al.). This paper describes the development and validation of individual numerical adjoint subroutines, followed by the testing and evaluation of the assimilation system as a whole with an idealized twin experiment and with data from Duck, North Carolina. In the twin experiment, the present system performs on par with that of Walker. Estimates of wave spectra and spectral statistics also compare well to measured spectral data at Duck, North Carolina. The error in these estimates is partly due to the exclusion of nonlinear source and sink terms from the adjoint and partly due to different spectral processing techniques used for different types of instruments.
ACCESSION #
87662343

 

Related Articles

  • Preferential coupling of an incident wave to reflection eigenchannels of disordered media. Choi, Wonjun; Kim, Moonseok; Kim, Donggyu; Yoon, Changhyeong; Fang-Yen, Christopher; Park, Q-Han; Choi, Wonshik // Scientific Reports;6/19/2015, p11393 

    Light waves incident to a highly scattering medium are incapable of penetrating deep into the medium due to the multiple scattering process. This poses a fundamental limitation to optically imaging, sensing, and manipulating targets embedded in opaque scattering layers such as biological...

  • A Formula for the Calculation of the Longshore Sediment Transport Including Spectral Effects. Barbaro, Giuseppe; Foti, Giandomenico; Sicilia, Luca; Malara, Giovanni // Journal of Coastal Research;Sep2014, Vol. 30 Issue 5, p961 

    Barbaro, G.; Foti, G.; Sicilia, L., and Malara, G., 2014. A formula for the calculation of the longshore sediment transport including spectral effects. The objective of this paper is to propose an expression for the calculation of the longshore sediment transport (LST), including the effect of...

  • Wave–Turbulence Interactions in a Breaking Mountain Wave. Epifanio, Craig C.; Qian, Tingting // Journal of the Atmospheric Sciences;Oct2008, Vol. 65 Issue 10, p3139 

    The mean and turbulent structures in a breaking mountain wave are considered through an ensemble of high-resolution (essentially large-eddy simulation) wave-breaking calculations. Of particular interest are the turbulent heat and momentum fluxes in the breaking wave and their roles in shaping...

  • WAVE ENERGY DISSIPATION LABORATORY MODELLING OF SUBMERGED BREAKWATER FOR SHORELINE EROSION CONTROL. Desa, Safari Mat; Karim, Othman A.; Melini, Wan Hanna; Mohamed, Azuhan; Mohamad, Fauzi; Chatta, Icahri // Defence S&T Technical Bulletin;2016, Vol. 9 Issue 2, p68 

    Submerged breakwaters provide beach protection by dissipating the wave energy for shoreline erosion abatement without destroying beach aesthetics. The geometrical characteristics of the structural design of the submerged breakwater determine its stability. Wave magnitude propagation in the...

  • Photoinduced large amplitude motion as mechanism for pure electronic dephasing and its manifestation in continuous-wave and time-resolved spectroscopy. Stock, Gerhard // Journal of Chemical Physics;7/1/1994, Vol. 101 Issue 1, p246 

    It is demonstrated that photoinduced large amplitude (LA) dynamics on a picosecond time scale may result in electronic pure dephasing on a time scale of a few tens of femtoseconds. It is shown that LA photodynamics affects continuous-wave (cw) spectra (e.g., absorption and resonance-Raman) and...

  • Investigation of some Rydberg states of ketene by two-photon resonance-enhanced multiphoton ionization spectroscopy. Wang, Shiliang; Shi, Yujun; Dénommée, Stéphane; Simard, Benoit; Yuan-Pern Lee // Journal of Chemical Physics;10/15/2003, Vol. 119 Issue 15, p7772 

    Rydberg states of CH[sub 2]CO and CD[sub 2]CO in the 54 000–72 000 cm-1 spectral range have been reinvestigated using two-photon resonance-enhanced multiphoton-ionization spectroscopy. Improved resolution and sensitivity has allowed for identifications of more Rydberg states than in...

  • Dynamic Performance Testing of Excluded Spectra Range of Band- Stop-Filter. Gwanggil Jeon // International Journal of Control & Automation;Jun2013, Vol. 6 Issue 3, p347 

    This paper studies about band-stop-filter which attenuates certain areas, and passes very high and very low band of frequencies. We study the influence of excluded spectra range by evaluating MSE and PSNR performance. Simulation results confirm that accepting more high frequency energy improves...

  • Features of thin spatial structure of the quasar 3C216 at decameter lengths of waves. Megn, A. V.; Rashkovskiy, S. L.; Shepelev, V. A.; Inytin, G. A.; Vashchishin, R. V.; Brazhenko, A. I.; Koshoviy, V. V.; Lozinskiy, A. B. // AIP Conference Proceedings;1/1/2010, Vol. 1206 Issue 1, p354 

    The results of interferometric researches of the quasar 3C216 have been presented. The model of brightness distribution of the quasar at frequencies of 20 and 25 MHz and spectra of its details at frequencies below 1 GHz have been refined. It was found out, that at decameter lengths the radio...

  • Measuring the Relationship Between Wind Stress and Sea State in the Open Ocean in the Presence of Swell. Dobson, Fred W.; Smith, Stuart D.; Anderson, Robert J. // Atmosphere -- Ocean (Canadian Meteorological & Oceanographic Soc;Mar1994, Vol. 32 Issue 1, p237 

    Wind stress and directional wave spectra were measured during the Grand Banks ERS-1 SAR wave spectra validation experiment. Swell dominated the wave spectral energy, so that existing relations between wind stress and sea state at sheltered sites were not directly applicable. To test the idea...

Share

Read the Article

Courtesy of VIRGINIA BEACH PUBLIC LIBRARY AND SYSTEM

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics