hydrophysicsФундаментальная и прикладная гидрофизикаFundamental and Applied Hydrophysics2073-66732782-5221St. Petersburg Research Center of the Russian Academy of Sciences10.7868/S2073667321020027hydrophysics-64Research ArticleГИДРОФИЗИЧЕСКИЕ И БИОГЕОХИМИЧЕСКИЕ ПОЛЯ И ПРОЦЕССЫHYDROPHYSICAL AND BIOGEOCHEMICAL FIELDS AND PROCESSESРасчет турбулентных напряжений в конвективно-перемешанном слое в мелководном озере подо льдом с использованием двух ADCPDeriving of Turbulent Stresses in a Convectively Mixed Layer in a Shallow Lake Under Ice by Coupling Two ADCPsБогдановС. Р.BogdanovS. R.

185030, пр. Александра Невского, д. 50, г. Петрозаводск

185030, Aleksandra Nevskogo Pr., 50, Petrozavodsk

ЗдоровенновР. Э.ZdorovennovR. E.

185030, пр. Александра Невского, д. 50, г. Петрозаводск

185030, Aleksandra Nevskogo Pr., 50, Petrozavodsk

ПальшинН. И.PalshinN. I.

185030, пр. Александра Невского, д. 50, г. Петрозаводск

185030, Aleksandra Nevskogo Pr., 50, Petrozavodsk

ЗдоровенноваГ. Э.ZdorovennovaG. E.

185030, пр. Александра Невского, д. 50, г. Петрозаводск

185030, Aleksandra Nevskogo Pr., 50, Petrozavodsk

zdorovennova@gmail.comТержевикА. Ю.TerzhevikA. Yu.

185030, пр. Александра Невского, д. 50, г. Петрозаводск

185030, Aleksandra Nevskogo Pr., 50, Petrozavodsk

ГавриленкоГ. Г.GavrilenkoG. G.

185030, пр. Александра Невского, д. 50, г. Петрозаводск

185030, Aleksandra Nevskogo Pr., 50, Petrozavodsk

ВолковС. Ю.VolkovS. Yu.

185030, пр. Александра Невского, д. 50, г. Петрозаводск

185030, Aleksandra Nevskogo Pr., 50, Petrozavodsk

ЕфремоваТ. В.EfremovaT. V.

185030, пр. Александра Невского, д. 50, г. Петрозаводск

185030, Aleksandra Nevskogo Pr., 50, Petrozavodsk

КулдинН. А.KuldinN. A.

185910, пр. Ленина, д. 33, г. Петрозаводск

185910, Lenina Pr., 33, Petrozavodsk

КириллинГ. Б.KirillinG. B.

12587 Mюггельзеедамм, 310, г. Берлин

12587, Müggelseedamm, 310, Berlin

Институт водных проблем Севера КарНЦ РАНРоссияNorthern Water Problems Institute Karelian Research Center of RASRussian FederationПетрозаводский государственный университетРоссияPetrozavodsk State UniversityRussian FederationЛейбниц-Институт пресноводной экологии и рыболовства внутренних водоемовГерманияDepartment of Ecohydrology, Leibniz-Institute of Freshwater Ecology and Inland Fisheries (IGB)Germany2021291120211421728Copyright © Богданов С.Р., Здоровеннов Р.Э., Пальшин Н.И., Здоровеннова Г.Э., Тержевик А.Ю., Гавриленко Г.Г., Волков С.Ю., Ефремова Т.В., Кулдин Н.А., Кириллин Г.Б., 20212021Богданов С.Р., Здоровеннов Р.Э., Пальшин Н.И., Здоровеннова Г.Э., Тержевик А.Ю., Гавриленко Г.Г., Волков С.Ю., Ефремова Т.В., Кулдин Н.А., Кириллин Г.Б.Bogdanov S.R., Zdorovennov R.E., Palshin N.I., Zdorovennova G.E., Terzhevik A.Y., Gavrilenko G.G., Volkov S.Y., Efremova T.V., Kuldin N.A., Kirillin G.B.Данная работа распространяется под лицензией Creative Commons Attribution 4.0.This work is licensed under a Creative Commons Attribution 4.0 License.https://hydrophysics.spbrc.ru/jour/article/view/64

Представлен метод расчета турбулентных напряжений, основанный на использовании пары трехлучевых акустических допплеровских профилографов скорости, c одной или двумя точками пересечения лучей. Для апробации метода был спланирован и проведен специальный натурный эксперимент по измерению температуры воды, уровня подледной облученности и компонент скорости в конвективно-перемешанном слое покрытого льдом небольшого бореального озера. Полученные данные позволяют рассчитать не только интенсивности пульсаций вдоль трех ортогональных осей, но и недиагональные компоненты тензора Рейнольдса. С использованием условия однородности средней скорости по горизонтали получены количественные результаты, описывающие энергетику процессов в период весенней подледной конвекции: рассчитана анизотропия турбулентных пульсаций, изучена корреляция энергии турбулентности с интенсивностью накачки (через поток плавучести). Приведен качественный анализ параметров и динамики энергосодержащих структур, развивающихся в конвективном слое небольших покрытых льдом озер весной.

This paper presents a method for deriving turbulent stresses using a pair of ADCPs with one or two points of beam intersections. A specific experiment, which includes measurements of water temperature, under-ice irradiation levels, and velocity components in the convectively mixed layer of a shallow ice-covered boreal lake, validated the method. The experimental data allows calculations of both the pulsation intensities along the three orthogonal axes and off-diagonal components of the Reynolds tensor. The specific features of spring under-ice convection processes, in particular, the anisotropy of turbulent pulsations and the correlation of turbulence energy with the turbulence energy production (as the buoyancy flux), were described using the horizontal homogeneity assumption. Finally, the paper presents a qualitative analysis of the parameters and dynamics of energy-containing structures developing in the convective layer of small ice-covered lakes in spring.

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The authors declare that there are no conflicts of interest present.