hydrophysicsФундаментальная и прикладная гидрофизикаFundamental and Applied Hydrophysics2073-66732782-5221St. Petersburg Research Center of the Russian Academy of Scienceshydrophysics-747Research ArticleГИДРОФИЗИЧЕСКИЕ И БИОГЕОХИМИЧЕСКИЕ ПОЛЯ И ПРОЦЕССЫHYDROPHYSICAL AND BIOGEOCHEMICAL FIELDS AND PROCESSESВоспроизведение весенне-летней эволюции термохалинной структуры в Финском заливе Балтийского моря на основе трехмерной гидродинамической модели высокого разрешенияModelling the spring-summer evolution of the thermohaline structure in the Gulf of Finland on the basis of a three-dimensional hydrodynamic model of high resolutionВанкевичР. Е.VankevichR. E.

Санкт-Петербург

Saint-Petersburg

rvankevich@mail.ruСофьинаЕ. В.SofinaE. V.

Санкт-Петербург

Saint-Petersburg

sofjina_k@mail.ruРябченкоВ. А.RyabchenkoV. A.vla-ryabchenko@yandex.ruСанкт-Петербургский филиал Института океанологии им. П. П. Ширшова РАН; Российский государственный гидрометеорологический университетРоссияSaint-Petersburg Branch of the P. P. Shirshov Institute of Oceanology of RAS; Russian State Hydrometeorological UniversityRussian FederationСанкт-Петербургский филиал Института океанологии им. П. П. Ширшова РАНРоссияSaint-Petersburg Branch of the P. P. Shirshov Institute of Oceanology of RASRussian Federation2015151120228239Copyright © Ванкевич Р.Е., Софьина Е.В., Рябченко В.А., 20222022Ванкевич Р.Е., Софьина Е.В., Рябченко В.А.Vankevich R.E., Sofina E.V., Ryabchenko V.A.This work is licensed under a Creative Commons Attribution 4.0 License.https://hydrophysics.spbrc.ru/jour/article/view/747

Для улучшения воспроизведения термохалинной структуры в Финском заливе предлагается трехмерная гидродинамическая модель, основанная на модельном комплексе NEMO (Nucleus for European Modelling of the Ocean — платформа европейской модели океана). Угловые шаги модельной сетки по широте и долготе равны, соответственно, 0.25 и 0.5' (≈ 0.5 км), что в 4–8 раз меньше значений бароклинного радиуса деформации Россби в Финском заливе. Вертикальный турбулентный обмен описывается с помощью схемы замыкания типа k-ε. Результаты расчетов сравниваются с данными контактных измерений температуры и солености, полученными с использованием СТD зонда на 38 станциях в экспедиции Российского государственного гидрометеорологического университета в восточной части Финского залива в период с 25 по 28 июля 2011 г. и данными CTD зондирования (15 станций) для летнего периода из базы данных BED (Baltic Environment Database). Рассчитанная температура поверхности моря сравнивается также с ее спутниковыми оценками, имеющими разрешение 1×1 км и полученными с помощью сканирующих спектрорадиометров MODIS. Показано, что выбор адекватной схемы турбулентного замыкания и реализация модели на сетке высокого разрешения (≈ 0.5 км) заметно улучшают (в сравнении с расчетами на грубых сетках) качество воспроизведения температуры в весенне-летний период. 

To improve the quality of simulation of thermohaline structure in the Gulf of Finland a three-dimensional hydrodynamic model is proposed. It is based on the model complex NEMO (Nucleus for European Modelling of the Ocean). Angular steps of the model grid on latitude and longitude are, respectively 0.25 and 0.5' (≈ 0.5 km), that is 4–8 times less than the value of the baroclinic Rossby deformation radius in the Gulf of Finland. Vertical turbulent exchange is described using a turbulent closure scheme of k-ε type. The calculation results are compared with contact measurements of temperature and salinity obtained using CTD probe at 38 stations in the expedition of the Russian State Hydrometeorological University in the eastern Gulf of Finland in the period from 25 to 28 July, 2011 and data CTD probe (15 stations) for the summer period, 2011 from the BED (Baltic Environment Database). Calculated sea surface temperature is also compared with its satellite estimates, having a resolution of 1×1 km and obtained by the Moderate-resolution Imaging Spectroradiometer (MODIS). It is shown that the choice of the appropriate scheme of turbulent closure and implementation of the model on the grid of high-resolution (≈ 0.5 km) led to significant improvement (compared with the calculations on a coarse grid) of the quality of simulation of temperature in the spring-summer period.

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