Three-Dimensional Structure and Dynamics of Coastal Eddy Dipoles in the Southeastern Baltic Sea: Results of Remote Sensing and Oceanographic Experiments in Summer 2021

IF 0.6 4区物理与天体物理 Q4 ASTRONOMY & ASTROPHYSICS

Cosmic Research Pub Date : 2023-12-01 DOI:10.1134/s0010952523700582

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Abstract

The results of quasi-synchronous satellite and experimental field observations of two submesoscale eddy dipoles in the coastal zone of the southeastern Baltic Sea near the coast of Kaliningrad Region are presented. The parameters of eddy dipole dynamics, namely, the duration of the process in the sea water and its propagation velocity and direction, as well as atmospheric conditions favorable for the occurrence of eddy dipoles, are determined from consecutive satellite images of high resolution. The characteristics of the three-dimensional structure of eddy dipoles are determined using the data of an acoustic current profiler and a hydrological probe obtained concurrently with satellite survey. The depth of vortical motion penetration into the water column is discussed and it is shown that such processes are not purely surface phenomena but have their influence down to a depth of 20 m and more. Direct measurements of current velocities and directions within particular parts of an eddy dipole demonstrate significantly greater dynamics of waters inside such formations compared to their displacement velocity. The differences in the anticyclonic and cyclonic parts of the dipoles are evaluated. Hydrological observations show the influence of the active cyclonic part of a dipole on surrounding waters manifested in both capture (rise) of deeper water and accumulation of surfactants within it.

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波罗的海东南部沿海涡旋偶极子的三维结构和动力学：2021 年夏季遥感和海洋学实验结果

摘要介绍了在加里宁格勒州海岸附近的波罗的海东南沿海地区对两个次中尺度涡旋偶极子进行的准同步卫星和试验性实地观测结果。根据连续的高分辨率卫星图像确定了涡偶极子动力学参数，即在海水中的持续时间、传播速度和方向，以及有利于出现涡偶极子的大气条件。利用与卫星勘测同时获得的声学海流剖面仪和水文探测器的数据，确定了涡偶极子三维结构的特征。讨论了涡流运动渗入水体的深度，并表明这种过程并非纯粹的表面现象，其影响深度可达 20 米或更深。对涡流偶极特定部分内的流速和方向的直接测量表明，与位移速度相比，涡流偶极内部水体的动态变化要大得多。对偶极的反气旋和气旋部分的差异进行了评估。水文观测结果表明，偶极的活跃旋流部分对周围水域的影响表现为深层水的捕获（上升）和表面活性剂在其中的积聚。

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来源期刊

Cosmic Research 地学天文-工程：宇航

CiteScore

1.10

自引率

33.30%

发文量

审稿时长

6-12 weeks

期刊介绍： Cosmic Research publishes scientific papers covering all subjects of space science and technology, including the following: ballistics, flight dynamics of the Earth’s artificial satellites and automatic interplanetary stations; problems of transatmospheric descent; design and structure of spacecraft and scientific research instrumentation; life support systems and radiation safety of manned spacecrafts; exploration of the Earth from Space; exploration of near space; exploration of the Sun, planets, secondary planets, and interplanetary medium; exploration of stars, nebulae, interstellar medium, galaxies, and quasars from spacecraft; and various astrophysical problems related to space exploration. A chronicle of scientific events and other notices concerning the main topics of the journal are also presented.