Roles of horizontal processes in the formation of density stratification in Hiuchi-Nada |
| |
Authors: | Hidetaka Takeoka Yasuhiko Ohno Norifumi Inahata |
| |
Institution: | (1) Department of Civil and Ocean Engineering, Faculty of Engineering, Ehime University, Bunkyo 3, 790 Matsuyama, Japan;(2) NEC Software Shikoku, Ltd., Kinuyama 4-760, 790 Matsuyama, Japan;(3) NEC Scientific Information System Development Co. Ltd., R&D bldg., Sakado 100-1, Takatsu, 213 Kawasaki, Japan |
| |
Abstract: | Roles of horizontal processes in the formation of the density stratification in Hiuchi-Nada are investigated by means of a
two-dimensional numerical model. In Hiuchi-Nada, vertically mixed and stratified regions are formed due to the regional difference
of the tidal currents, and a tidal front is formed between the two regions. The horizontal mixing across the tidal front suppresses
the development of the stratification, which is developed too much in the absence of the horizontal mixing. The moderate,
realistic stratification cannot be realized in the model without the horizontal mixing. Density currents are formed due to
the density distribution associated with the mixed and stratified states. These currents contribute to the horizontal mixing
through the shear effect. Horizontal heat transfer from the outside water generates the vertical circulation and causes the
stratification. This effect dominantly appears at the early and late stages of the stratified season. The stratification is
initiated before the beginning of the surface heating and persists beyond the end, due to the horizontal heat transfer. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|