A mesoscale vortex in a small stratified lake
A mesoscale vortex in a small stratified lake
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小型分层湖中的中尺度涡旋
DOI:
10.1007/s10652-008-9101-8
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发表时间:
2008
影响因子:
2.2
通讯作者:
S. Golosov
中科院分区:
文献类型:
--
作者:
G. Kirillin;C. Engelhardt;S. Golosov
A mesoscale vortex structure in the small stratified Lake Stechlin has been revealed by field experiments with satellite-tracked quasi-lagrangian drifters. The vortex with a radius of about 200 m drifted at 300 m/day along the western bight of the lake with nearly constant rotation speed of 3 cpd. Analysis of kinematical properties of the vortex motion demonstrates solid body character of rotation. Extrapolation of the vortex drift trajectory over the period preceding the observations combined with data on local winds and seiche dynamics has allowed tracing the vortex fate from its generation point. The normal modes analysis of the internal seiching in the lake reveals the vortex generation mechanism to be the interaction of certain seiche modes with local bottom topography and suggests generation of the mesoscale vortices to be the a regular feature of the lake circulation. Analysis of vorticity suggests additional energy supply to rotational flow, possibly from inverse cascading of small-scale turbulent motions—a feature typical for quasi-2D turbulence. The vortices can play an important role in the energy transport from basin-scale motions to small-scale boundary mixing. They can also contribute significantly to the horizontal heterogeneity of phyto- and zooplankton distribution as well as to the transport of dissolved matter such as nutrients between littoral and profundal areas. The topographically generated traveling vortices represent an analog of the synoptic eddies in the Ocean and in the Atmosphere, whereas their role in the lake hydrodynamics is practically unknown.
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DOI:
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发表时间:
1976
期刊:
影响因子:
--
作者:
A. Ōkubo;C. Ebbesmeyer;J. M. Helseth
通讯作者:
J. M. Helseth
DOI:
--
发表时间:
2007
期刊:
影响因子:
--
作者:
K. Shimizu;J. Imberger;M. Kumagai
通讯作者:
M. Kumagai
DOI:
--
发表时间:
1975
期刊:
影响因子:
--
作者:
J. Bennett
通讯作者:
J. Bennett
DOI:
--
发表时间:
1976
期刊:
影响因子:
--
作者:
A. Ōkubo;C. Ebbesmeyer
通讯作者:
C. Ebbesmeyer
DOI:
--
发表时间:
2003
期刊:
影响因子:
--
作者:
R. Koschel;D. D. Adams
通讯作者:
D. D. Adams