Abstract
Two numerical studies (Endoh, 1977;Harashima et al., 1978) have been proposed on a front formed by a coupling effect of cooling of the sea surface and inflow of the fresh water in a vertical two-dimensional plane without the rotation of the earth. It is, however, not easy to interpret their numerical results. A simple interpretation will be proposed by an analytical study in this paper.
It is found that local convection due to the density inversion, which is expressed by the convective adjustment of the vertical diffusion coefficient in the actual numerical calculations, plays an important role on the front formation.
The characteristics of the front is also clarified in the case of steady state. Namely, simple functional dependences are obtained of the position and the width of the front, the horizontal and the vertical velocities and the distribution of the buoyancy and the salinity in the neighborhood of the front on the horizontal coordinate, the cooling rate, the eddy coefficients of diffusion and viscosity, the water depth and the vertically averaged horizontal fluxes of buoyancy and salinity.
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Bowels, P., R.H. Burns, F. Hudswell andR.T.P. Whippe (1958): Sea disposal of low activity effluent. Proc. Conf. Peaceful Uses Atomic Energy, 2nd Geneva,18, 376–389.
Endoh, M. (1977): Formation of the thermohaline front by cooling of the sea surface and inflow of the fresh water. J. Oceanogr. Soc. Japan,33, 6–15.
Harashima, A., Y. Oonishi andH. Kunishi (1978): On the formation of water masses and fronts caused by density-induced current system. J. Oceanogr. Soc. Japan,34 (in press).
Kawai, H. (1955): On the polar frontal zone and its fluctuation in the waters to the northwest of Japan (II). Bull. Tohoku Reg. Fish. Lab.,5, 1–42 (in Japanese).
Oonishi, Y. andH. Kunishi (1977): A note on the coefficient of shear diffusion—Its time dependence-. J. Oceangr. Soc. Japan,33, 165–167.
Yanagi, T. (1976): On the coastal environment of the sea of Iyo (I). —Results of observations of KT-74-2 cruise of R. V. Tansei Maru.- Mem. of the Ehime Univ., Sect. 3, 8, 3, 233–238 (in Japanese).
Yoshioka, H. (1971): Oceanic front at Kii-Suido in winter (I). Umi to Sora,46(2), 31–44 (in Japanese).
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Oonishi, Y., Harashima, A. & Kunishi, H. Characteristics of a front formed by cooling of the sea surface and inflow of the fresh water. Journal of the Oceanographical Society of Japan 34, 17–23 (1978). https://doi.org/10.1007/BF02109612
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DOI: https://doi.org/10.1007/BF02109612