Кл.слова (ненормированные):
ADCP -- Lagrangian drifters -- Lake circulation -- Mesoscale eddies -- Doppler effect -- Lagrange multipliers -- Lakes -- Orthogonal functions -- Acoustic doppler current profiler -- ADCP -- Complex empirical orthogonal functions -- Elliptical structures -- Horizontal velocity -- Lagrangian drifters -- Mesoscale eddy -- Mesoscale vortices -- Vortex flow
Аннотация: In the summer period of 2018 satellite-tracked quasi-lagrangian drifter was launched in saline stratified Lake Shira (Republic of Khakassia, Russia). The analysis of obtained data was revealed a mesoscale vortex structure in the lake. At the same time, measurements of the current velocity were carried out at several points in the lake using an Acoustic Doppler Current Profiler (ADCP). The reliability of the data obtained using the quasi-lagrangian drifter is confirmed by a comparison with the data for the current velocity and for the direction and speed of the wind. The horizontal velocity was analyzed using complex empirical orthogonal functions. The hodograph of the first temporal coefficient shows the elliptical structure of the current. This effect may be due to the strong variability of wind on the lake during the summer period or to the vortex structure of wind stress. To clarify the origin and distribution of the mesoscale eddies (vortices) in Lake Shira, it is necessary to conduct a study with a large number of drifters. © SGEM2019.
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Держатели документа:
ICM SB RAS, Krasnoyarsk, Russian Federation
Siberian Federal University, Krasnoyarsk, Russian Federation
Доп.точки доступа:
Volodko, O. S.; Kompaniets, L. A.; Gavrilova, L. V.