TY - JOUR

T1 - Estimates of the turbulent kinetic energy budget in the oceanic convective boundary layer

AU - Endoh, Takahiro

AU - Matsuno, Takeshi

AU - Yoshikawa, Yutaka

AU - Tsutsumi, Eisuke

N1 - Funding Information:
Acknowledgments The authors would like to express their gratitude to the captain, officers, and crew of T/V Nagasaki-Maru of the Faculty of Fisheries, Nagasaki University, and the scientific parties on board for their great help in collecting the data. They are also grateful to anonymous reviewers for invaluable comments and suggestions on the original manuscript. This work was supported by a Grant-in-Aid for Scientific Research provided to T. Endoh and Y. Yoshikawa by the Ministry of Education, Culture, Sports, Science and Technology (MEXT) of Japan (22340140), and by the Collaborative Research Program of the Research Institute for Applied Mechanics (RIAM), Kyushu University.

PY - 2014/2

Y1 - 2014/2

N2 - The terms of the steady-state turbulent kinetic energy (TKE) budget in the oceanic convective boundary layer (CBL) are estimated by use of microstructure data obtained over the continental shelf of the East China Sea. The dissipation term is calculated from the micro-scale vertical shear of horizontal velocity measured directly using a freely-falling microstructure profiler, whereas the buoyancy flux and shear production terms are estimated indirectly by integrating vertically the one-dimensional conservation equation of density and by applying similarity theory, respectively. The transport term, calculated as the residual of the other three terms, vertically redistributes the TKE from the upper half of the CBL to the lower half, consistent with the TKE budgets in the atmospheric CBL and in shear-free and slightly-sheared CBLs simulated by large eddy-simulation models. The relatively large contribution of the transport term to the TKE budget shows that a local equilibrium form of the TKE equation is not appropriate for the TKE budget in the oceanic CBL.

AB - The terms of the steady-state turbulent kinetic energy (TKE) budget in the oceanic convective boundary layer (CBL) are estimated by use of microstructure data obtained over the continental shelf of the East China Sea. The dissipation term is calculated from the micro-scale vertical shear of horizontal velocity measured directly using a freely-falling microstructure profiler, whereas the buoyancy flux and shear production terms are estimated indirectly by integrating vertically the one-dimensional conservation equation of density and by applying similarity theory, respectively. The transport term, calculated as the residual of the other three terms, vertically redistributes the TKE from the upper half of the CBL to the lower half, consistent with the TKE budgets in the atmospheric CBL and in shear-free and slightly-sheared CBLs simulated by large eddy-simulation models. The relatively large contribution of the transport term to the TKE budget shows that a local equilibrium form of the TKE equation is not appropriate for the TKE budget in the oceanic CBL.

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U2 - 10.1007/s10872-013-0215-3

DO - 10.1007/s10872-013-0215-3

M3 - Article

AN - SCOPUS:84895068497

VL - 70

SP - 81

EP - 90

JO - Journal of Oceanography

JF - Journal of Oceanography

SN - 0916-8370

IS - 1

ER -