Autonomous Internal Wave Measurer based on Temperature Transmitters for Shelf Studies

A. N. Serebryany1, 2, *, D. M. Denisov2, E. E. Khimchenko1

1 Shirshov Institute of Oceanology, Russian Academy of Sciences, Moscow, Russia

2 Andreyev Acoustics Institute JSC, Moscow, Russia

* e-mail: serebryany53@list.ru

Abstract

The paper describes a device for measuring internal waves, which is made on the basis of a line temperature sensor. This sensor measures the average temperature of the water layer it covers, which makes it possible to avoid registration of fine-structural distortions. The device works offline with the possibility of long-term accumulation of a large amount of information (with an interval of 1 minute – within 1 year). The measurement resolution is set from 1 to 1200 s. The average temperature measurement error is 0.1 °C, temperature resolution is not worse than 0.03 °C. The working depth is up to 200 m. The autonomous measurer is compact and easy to use. The device connects to a computer or smartphone via Bluetooth wireless technology. The paper presents the results of comparative simultaneous measurements carried out by the device and a chain of point temperature sensors on the Black Sea shelf in summer 2018 and autumn 2019. The paper gives examples of the use of an autonomous measurer for recording short-period and inertial internal waves. The comparison of the obtained series shows their close similarity. The conducted frequency spectral analysis also demonstrates a good match and identification of the main peaks of registered phenomena. The device proved to be a reliable and promising tool for measuring internal waves on the shelf.

Keywords

internal wave measurer, measuring device, line temperature sensor, short-period internal waves, sensor chain, point temperature sensor, temperature sensor

Acknowledgments

The work was performed under state assignment no. FMWE-2021-0010 of the Ministry of Education and Science of the Russian Federation “Methods and means of oceanographic observations for the study of natural and technogenic underwater objects and ecology in the hydrosphere: development of technologies for multi-parameter scanning of underwater environment and objects by autonomous and tethered probes and profilers”.

For citation

Serebryany, A.N., Denisov, D.M. and Khimchenko, E.E., 2023. Autonomous Internal Wave Measurer based on Temperature Transmitters for Shelf Studies. Ecological Safety of Coastal and Shelf Zones of Sea, (2), pp. 134–144. doi:10.29039/2413-5577-2023-2-134-144

DOI

10.29039/2413-5577-2023-2-134-144

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