Observations of mean and wave orbital flows in the ocean’s upper centimetres
Observations of mean and wave orbital flows in the ocean’s upper centimetres
复制标题
海洋上层厘米平均轨道流和波浪轨道流的观测
DOI:
10.1017/jfm.2019.1019
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发表时间:
2020
影响因子:
3.7
通讯作者:
Zappa, Christopher J.
中科院分区:
文献类型:
--
作者:
Laxague, Nathan J.;Zappa, Christopher J.
Sophisticated measurements of fluid velocity near to an undulating air–water boundary have traditionally been confined to the laboratory setting. Developments in camera technology and the opening of novel modes of analysis have allowed for sensitive measurements of the current profile in the ocean’s uppermost layer. Taking advantage of the Research Platform R/P FLIP as a ‘laboratory at sea’, here we present first-of-their-kind thermal and polarimetric camera-based observations of wave orbital velocities and mean shear flows in the upper centimetres of the ocean surface layer. Measurements reveal a well-defined logarithmic layer as seen in laboratory measurements and described by classical surface layer theory; however, substantial spread of observations is found at low levels of wind forcing, where the Stokes drift of swell may have a substantial impact on the near-surface current profile. A novel application of short time window Fourier transforms allows for the estimation of near-surface wave orbital velocity magnitudes. These are found to be in general agreement with the prescriptions of linear wave theory, although observations diverge from theory at high levels of wind forcing where the interface is subject to surface wave breaking. Finally, the surface gravity wave phase-coherent short wave growth is presented and discussed in the context of hydrodynamic wave and airflow modulation.
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DOI:
--
发表时间:
2018
期刊:
Journal of Geophysical Research: Oceans
影响因子:
--
作者:
N. Laxague;C. Zappa;D. A. LeBel;M. Banner
通讯作者:
M. Banner
DOI:
--
发表时间:
1974
期刊:
影响因子:
--
作者:
E. Thornton;R. F. Krapohl
通讯作者:
R. F. Krapohl
DOI:
--
发表时间:
1954
期刊:
影响因子:
--
作者:
H. Stommel
通讯作者:
H. Stommel
影响因子:
2.4
作者:
C. Zappa;M. Banner;H. Schultz;A. Corrada-Emmanuel;L. B. Wolff;Jacob I. Yalcin
通讯作者:
C. Zappa;M. Banner;H. Schultz;A. Corrada-Emmanuel;L. B. Wolff;Jacob I. Yalcin
影响因子:
4.8
作者:
M. Stresser;R. Carrasco;J. Horstmann
通讯作者:
J. Horstmann