A spatially distributed measuring complex for monitoring hydrophysical processes on the ocean shelf

Leontyev, A. P.; Yaroshchuk, I. O.; Smirnov, S. V.; Kosheleva, A. V.; Пивоваров, А. А.; Samchenko, A. N.; Shvyrev, A. N.

doi:10.1134/s0020441216060191

Cited by 20 publications

(9 citation statements)

References 6 publications

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“…Field measurements were carried out off the coast of Posyet Bay on August 18-26, 2016. Autonomous digital pressure gauges (PG) of the spatially distributed monitoring system (Leontyev et al 2017) were used to measure hydrostatic variations of the bottom pressure. The inset in Fig.…”

Section: Field Measurements and Data Analysismentioning

confidence: 99%

“…The gauges were recording with a sampling frequency of 16 Hz (0.06-s sampling interval). Leontyev et al (2017) described in detail the data processing procedure, including filtering and sample rate conversion according to Lyons (2004).…”

Section: Field Measurements and Data Analysismentioning

confidence: 99%

“…Such studies are necessary to identify and monitor potentially hazardous coastal areas and should include field measurements directly in the adjacent coastal waters. This work uses the RTWS data, and measurements obtained using autonomous digital pressure gauges of the spatially distributed monitoring system (Leontyev et al 2017).…”

Section: Introductionmentioning

confidence: 99%

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Resonant oscillations in the western part of the Peter the Great Gulf in the Sea of Japan

et al. 2021

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The research aims to study the resonant properties of the water area of the Peter the Great Gulf, in the Sea of Japan. The coast of the gulf is exposed to the threat of tsunamis due to relatively high seismic activity in the Sea of Japan. On May 26, 1983, a tsunami hit several bays of the gulf with wave heights reaching 5 m. As a response, the coasts were equipped with three sophisticated sea level measuring stations. Field measurements with installation of autonomous pressure gauges were carried out August 18-26, 2016, to study the peculiarities of free surface oscillations in the western part of the Peter the Great Gulf. Spectral analysis of the recorded data and the data obtained from the Posyet automated post of the Russian Tsunami Warning Service showed, in particular, that there were several clearly pronounced peaks at periods of 40, 48, 79 and 89 min. These oscillations are coincident for the Sea of Japan and the studied water area with a wide entrance. A finite-volume numerical model was used to calculate free oscillations in the computational domain covering the Sea of Japan region. We performed model calculations with an irregular triangular grid. This allowed us to describe both the outer water area of the Sea of Japan and separate small-scale relief elements in the water area under study, which are important for the formation of local seiches. Isophases and spatial patterns of several resonant oscillations spectra at 15-105 min periods were obtained for the Peter the Great Gulf area. Model calculations carried out in this work showed an evident spatial structure of resonant oscillations. Such research, including field measurements in adjacent coastal waters, is required to identify and monitor potentially hazardous coastal areas. The amplification of resonant oscillations depends on how effectively the specific atmospheric disturbance generates corresponding eigenmodes of the Sea of Japan. In some bays, the amplitudes of the Sea of Japan eigen oscillations can increase due to resonant properties of coastal water areas, even with a low quality factor. If the amplitudes are large, such a double resonance can lead to a meteorological tsunami.

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Section: Field Measurements and Data Analysismentioning

confidence: 99%

Section: Field Measurements and Data Analysismentioning

confidence: 99%

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Resonant oscillations in the western part of the Peter the Great Gulf in the Sea of Japan

et al. 2021

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“…No entanto, a contribuição associada a repetitividade não passou de 0, 5% e o seu valor corresponde a um desvio-padrão de 0, 0302 (quase a metade da resolução conseguida com 12 bits). Este fato sugere que, em situações onde seja possível utilizar técnicas de sobreamostragem, como foi realizada em [29] para este mesmo tipo de termômetro, aumentar a resolução em 1 ou 2 bits permitirá explorar de forma otimizada a precisão alcançada por este sensor.…”

Section: Balanço Das Incertezasunclassified

Calibração de Sensores de Temperatura de Circuito Integrado para Fundeios em Águas Rasas

Lopes¹,

Candella²,

Cernicchiaro³

2019

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Resumo: Um sistema medição da temperatura do oceano com exatidão elevadaé fundamental para um melhor conhecimento da variabilidade temporal da estratificação térmica das camadas deágua. O custo dos sistemas comerciais disponíveis no mercado apresenta uma grande barreira para a manutenção de uma série contínua de dados. O crescente desenvolvimento de sensores construídos em circuitos integrados surge como uma alternativa economicamente viável para estudos de fenômenos costeiros. Neste trabalho são apresentados o arranjo experimental e a metodologia de calibração utilizada no desenvolvimento de cadeias de termômetros industriais aplicadas a fundeios oceanográficos emáguas rasas. Os equipamentos utilizados foram adaptados para atender aos requisitos descritos nas principais normas de metrologia e orientações para laboratórios de calibração. Os resultados demonstram um ganho em exatidão superior em relação aos dados de calibração de fábrica.Palavras-chave: Calibração, exatidão, 1-Wire, LabVIEW, cadeia de termômetros, fundeios oceanográficos.Abstract: A high accuracy ocean temperature measurement system is essential for a better understanding of the temporal variability of the thermal stratification of water layers. The cost of available commercial systems presents a major barrier to maintaining a continuous data series. The growing development of sensors built in integrated circuits emerges as an economically viable alternative for studies of coastal phenomena. This work presents the experimental arrangement and the calibration methodology used in the development of industrial thermometer chains applied to shallow water oceanographic moorings. The equipment used was adapted to meet the requirements described in the main metrology standards and guidelines for calibration laboratories. Results demonstrate a gain in superior accuracy over factory calibration data.

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“…Реальные pnp + -структуры обладают характеристиками, несколько отличающимися от (4) и (5) [2,7]. Дифференциальная погонная проводимость 0 g pnp + -структуры при этом оказывается отличной от нуля во всем диапазоне напряжений.…”

Section: Introductionunclassified

Mathematical Model and Measuring Algorithm of Continually Distributed Semiconductor Sensor of a Temperature Profile in Non-Isothermal Flows

Евдокимов

Мохаммед

Храмов³

2019

«Izvestiya vysshikh uchebnykh zavedenii. PROBLEMY ENERGETIKI»

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This paper proposes a mathematical model and a measuring algorithm for a semiconductor one-dimensional distributed sensor designed to measure temperature fields in non- isothermal liquid and gas flows. A sensor device, its equivalent circuit and a circuit for connection to a measuring circuit are described. A step-by-step measurement algorithm is proposed, which includes the necessary electrical measuring operations and an algorithm for mathematical processing of the primary measurement information in order to determine the measured temperature field.

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A spatially distributed measuring complex for monitoring hydrophysical processes on the ocean shelf

Cited by 20 publications

References 6 publications

Resonant oscillations in the western part of the Peter the Great Gulf in the Sea of Japan

Resonant oscillations in the western part of the Peter the Great Gulf in the Sea of Japan

Calibração de Sensores de Temperatura de Circuito Integrado para Fundeios em Águas Rasas

Mathematical Model and Measuring Algorithm of Continually Distributed Semiconductor Sensor of a Temperature Profile in Non-Isothermal Flows

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