Articles by Andrey Zavadsky

@article{s22103818,

title = {On the Effect of Interferences on X-Band Radar Wave Measurements},

author = {Pavel Chernyshov and Katrin Hessner and Andrey Zavadsky and Yaron Toledo},

url = {https://www.mdpi.com/1424-8220/22/10/3818},

doi = {10.3390/s22103818},

issn = {1424-8220},

year  = {2022},

date = {2022-05-18},

journal = {Sensors},

volume = {22},

number = {3818},

issue = {10},

abstract = {X-band radars are in growing use for various oceanographic purposes, providing spatial real-time information about sea state parameters, surface elevations, currents, and bathymetry. Therefore, it is very appealing to use such systems as operational aids to harbour management. In an installation of such a remote sensing system in Haifa Port, consistent radially aligned spikes of brightness randomly distributed with respect to azimuth were identified. These streak noise patterns were found to be interfering with the common approach of oceanographic analysis. Harbour areas are regularly frequented with additional electromagnetic transmissions from other ship and land-based radars, which may serve as a source of such interference. A new approach is proposed for the filtering of such undesirable interference patterns from the X-band radar images. It was verified with comparison to in-situ measurements of a nearby wave buoy. Regardless of the actual source of the corresponding pseudo-wave energy, it was found to be crucial to apply such filtration in order to improve the performance of the standard oceanographic parameter retrieval algorithm. This results in better estimation of the mean sea state parameters towards lower values of the significant wave height.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{https://doi.org/10.1029/2020JC016400,

title = {Trapped Low Frequency Waves on the Northern Israeli Continental Shelf},

author = {Nir Haim and Sara Nauri and Andrey Zavadsky and Eliezer Kit and Yaron Toledo},

url = {https://agupubs.onlinelibrary.wiley.com/doi/abs/10.1029/2020JC016400},

doi = {https://doi.org/10.1029/2020JC016400},

issn = {2169-9291},

year  = {2020},

date = {2020-09-21},

urldate = {2020-01-01},

journal = {Journal of Geophysical Research: Oceans},

volume = {125},

issue = {10},

pages = {e2020JC016400},

abstract = {Abstract Time series of sea level measurements from different instruments deployed around the Haifa Bay area are analyzed. All observations indicate the existence of persistent low frequency oscillations with periods corresponding to approximately 1 hour and to approximately 30 minutes. These oscillations are persistent throughout most of the year and reached maximal wave heights of around 30 cm, a comparable value to tidal variations, making these oscillations an important factor in determining the average sea level elevation. The work identifies the phenomenon as resonant trapped waves, which are normal modes of the continental shelf extending from Haifa promontory to Achziv Canyon. Their temporal and spatial characteristics are learned through field measurement data analysis, wavelet analysis, numerical simulations, and exploration of an analytic solution. Finally, possible mechanisms for the generation of these waves are discussed. Such waves, which are commonly not surveyed, can be an important factor affecting coastal dynamics such as breaker line and coast line locations. Furthermore, the resonance behavior found has the capability of increasing the deep-to-shallow amplitudes in up to two orders of magnitude depending on incident angle. Noting that seismic or atmospheric events can agitate oscillation with similar wave periods, the intensification poses a hazard to Haifa Bay and coastal area.},

note = {e2020JC016400 10.1029/2020JC016400},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{zavadsky2018measurements,

title = {Measurements of waves in a wind-wave tank under steady and time-varying wind forcing},

author = {Andrey Zavadsky and Lev Shemer},

doi = {https://www.jove.com/t/56480/measurements-waves-wind-wave-tank-under-steady-time-varying-wind},

year  = {2018},

date = {2018-01-01},

journal = {JoVE (Journal of Visualized Experiments)},

number = {132},

pages = {e56480},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{doi:10.1063/1.4973319,

title = {On the two-dimensional structure of short gravity waves in a wind wave tank},

author = {Andrey Zavadsky and Alvise Benetazzo and Lev Shemer},

url = {https://doi.org/10.1063/1.4973319},

doi = {10.1063/1.4973319},

year  = {2017},

date = {2017-01-01},

journal = {Physics of Fluids},

volume = {29},

number = {1},

pages = {016601},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{zavadsky2017water,

title = {Water waves excited by near-impulsive wind forcing},

author = {Andrey Zavadsky and Lev Shemer},

doi = {https://doi.org/10.1017/jfm.2017.521},

year  = {2017},

date = {2017-01-01},

journal = {Journal of Fluid Mechanics},

volume = {828},

pages = {459--495},

publisher = {Cambridge University Press},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{doi:10.1063/1.4982897,

title = {Investigation of statistical parameters of the evolving wind wave field using a laser slope gauge},

author = {A. Zavadsky and L. Shemer},

url = {https://doi.org/10.1063/1.4982897},

doi = {10.1063/1.4982897},

year  = {2017},

date = {2017-01-01},

journal = {Physics of Fluids},

volume = {29},

number = {5},

pages = {056602},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{zavadsky2012characterization,

title = {Characterization of turbulent airflow over evolving water-waves in a wind-wave tank},

author = {Andrey Zavadsky and Lev Shemer},

year  = {2012},

date = {2012-01-01},

journal = {Journal of Geophysical Research: Oceans},

volume = {117},

number = {C11},

publisher = {Wiley Online Library},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{kit2010situ,

title = {In situ calibration of hot-film probes using a collocated sonic anemometer: implementation of a neural network},

author = {E Kit and A Cherkassky and T Sant and HJS Fernando},

year  = {2010},

date = {2010-01-01},

journal = {Journal of Atmospheric and Oceanic Technology},

volume = {27},

number = {1},

pages = {23--41},

keywords = {},

pubstate = {published},

tppubtype = {article}

}