{"title":"Structure and Characteristics of Internal Wave Field in an Ocean Frontal Region East of Malta in Mediterranean","authors":"I. P. Chunchuzov, O. M. Johannessen, O. E. Popov","doi":"10.1134/s0001433823330010","DOIUrl":null,"url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The structure and characteristics of the internal wave field (coherence, frequency spectra, phase velocities, dispersion of velocity fluctuations) observed in an ocean frontal zone on the shelf-slope east of the island of Malta is studied. Using spectral and coherence analysis of temporal temperature variations measured by two thermistor chains 7 km apart the near-inertial internal gravity waves (NIWs) were detected, and their wavelengths and trace velocities were estimated. The temperature, salinity and density front that existed during the measurement period and the bottom irregularities of island’s shelf are both proposed to be the sources of the observed NIWs and internal waves of different periods. The mechanism of formation of the frequency spectrum of the observed internal wave field is proposed. By analyzing the effect of advection of internal waves by an alternating current induced by all the internal waves the observed periodic change of the sign of the trace velocity of the internal waves is explained.</p>","PeriodicalId":54911,"journal":{"name":"Izvestiya Atmospheric and Oceanic Physics","volume":"22 1","pages":""},"PeriodicalIF":0.9000,"publicationDate":"2023-12-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Izvestiya Atmospheric and Oceanic Physics","FirstCategoryId":"89","ListUrlMain":"https://doi.org/10.1134/s0001433823330010","RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"METEOROLOGY & ATMOSPHERIC SCIENCES","Score":null,"Total":0}
引用次数: 0
Abstract
The structure and characteristics of the internal wave field (coherence, frequency spectra, phase velocities, dispersion of velocity fluctuations) observed in an ocean frontal zone on the shelf-slope east of the island of Malta is studied. Using spectral and coherence analysis of temporal temperature variations measured by two thermistor chains 7 km apart the near-inertial internal gravity waves (NIWs) were detected, and their wavelengths and trace velocities were estimated. The temperature, salinity and density front that existed during the measurement period and the bottom irregularities of island’s shelf are both proposed to be the sources of the observed NIWs and internal waves of different periods. The mechanism of formation of the frequency spectrum of the observed internal wave field is proposed. By analyzing the effect of advection of internal waves by an alternating current induced by all the internal waves the observed periodic change of the sign of the trace velocity of the internal waves is explained.
期刊介绍：
Izvestiya, Atmospheric and Oceanic Physics is a journal that publishes original scientific research and review articles on vital issues in the physics of the Earth’s atmosphere and hydrosphere and climate theory. The journal presents results of recent studies of physical processes in the atmosphere and ocean that control climate, weather, and their changes. These studies have possible practical applications. The journal also gives room to the discussion of results obtained in theoretical and experimental studies in various fields of oceanic and atmospheric physics, such as the dynamics of gas and water media, interaction of the atmosphere with the ocean and land surfaces, turbulence theory, heat balance and radiation processes, remote sensing and optics of both media, natural and man-induced climate changes, and the state of the atmosphere and ocean. The journal publishes papers on research techniques used in both media, current scientific information on domestic and foreign events in the physics of the atmosphere and ocean.
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