Tidal internal waves in the Bransfield Strait, Antarctica

Abstract

Observations of tidal internal waves in the Bransfield Strait, Antarctica, are analyzed. The measurements were carried out for 14 days on a moored station equipped with five autonomous temperature and pressure sensors. Vertical displacements of temperature revealed that strong internal vertical oscillations up to 30-40 m are caused by the diurnal internal tide. The waves are forced due to the interaction of the barotropic tide with the bottom topography. The velocity ellipses of the barotropic tidal currents were estimated using the global tidal model.

Wave climate in subarctic seas from Voluntary Observing Ships: 1900--2020

“…However, various methods of the estimation of biases in VOS data and their correction have been recently developed along with multistage quality control procedures [Badulin and Grigorieva, 2012;Gulev et al, 2003]. Moreover, the accuracy of the VOS data is proven to be comparable or even superior to modern measurements [Grigorieva et al, 2020;Lavrova et al, 2011;Vignudelli et al, 2011].…”

“…Visual wave observations are primarily used for global wave climate analysis [Grigorieva and Badulin, 2016;Grigorieva et al, 2020;Gulev et al, 2003;Kent et al, 2019] as they cover the entire World Ocean, although they are characterized by strong sampling inhomogeneity in space and uneven sampling density in time. Model simulations and satellite measurements are sometimes considered superior in that regard and are more frequently used for wave studies in the last few decades [Badulin et al, 2018].…”

“…Wave climate studies for individual seas or selected regions are usually based on stationary buoy and platforms measurements, regional wave model simulations and short-term field experiments [Khimchenko et al, 2020;Lopatukhin et al, 2002Lopatukhin et al, , 2003Markina and Gavrikov, 2016;Reistad et al, 2011;Saprykina andKuznetsov, 2018a, 2018b]. This paper represents a novel analysis of the long-term wave climate tendencies for the subpolar North Atlantic Ocean including the Greenland, Norwegian, and Barents seas, based on the VOS data for the period of 120 years (1900-2020).…”

Phase Structure of Internal Gravity Waves in the Ocean with Shear Flows

“…Используя различные приближения, в том числе метод ВКБ, основанный на реалистичном предположении о плавности изменения параметров океанической среды по сравнению с длинами ВГВ, можно построить аналитические решения для модельных распределений частоты плавучести и сдвиговых течений [3,5,6]. Поэтому представляет несомненный интерес изучение ВГВ в океане с произвольным распределением по вертикали как плотности, так и наблюдаемых в морских условиях фоновых сдвиговых течений [4,[7][8][9]. Тем самым появляется возможность изучения амплитудно-фазовых характеристик волновых полей реальных океанологических параметров.…”

“…Если выполнено условие Майлса -Ховарда, то соответствующая спектральная задача не имеет комплексных собственных значений [3,14]. Характерные значения чисел Ричардсона в различных акваториях Мирового океана при отсутствии динамической неустойчивости фоновых сдвиговых течений могут находиться в интервалах 2-20 [4,[7][8][9]. Решение задачи (2) ищется в виде интегралов Фурье…”