Ocean-atmosphere interaction on wind and heat budget at the coast

Numerical prediction of airflow and heat budget in summer of the 1995 over the coastal inland and sea has been carried out by a non-hydrostatic numerical grid point model with a complex terrain-following coordinate system with one-way double nesting technique. As prevailing synoptic scale westerly wind blows over Mt. Taeguallung in the west of Kangnung coastal city toward the Sea of Japan and easterly sea breeze also blows from the sea toward the top of the mountain, two different kinds of wind resumes exist near the top of the mountain, especially east side of the mountain and then produces a return flow to the sea. Convective boundary layer is developed with a thickness of about 1km over the ground in the upwind side of the mountain, while a thickness of thermal internal boundary layer (TIBL) from the coast along the eastern slope of the mountain is only confined to less than 150m. The TIBL below the sea breeze front, where the sea breeze starts at about 100km from the sea toward to the mid of the eastern slope of the mountain and goes up to 1700m height, finally returning toward the eastern sea. Since sensible heat flux convergence near the top of the mountain is stronger than over the coastal sea, accumulated sensible heat flux should be transported into the coast, resulting in very high air temperatures just near the coastal surface. Latent heat flux convergence at the inland coast is also greater than one at the top of the mountain and water vapor should be transported from the coast into the mountain top. Contrary to the daytime one, nighttime radiative cooling process after sunset induces an intensified westerly downslope wind from the top of the mountain toward the coast, under the association with land breeze. Sensible heat flux divergences at the mountain and sea surfaces produce shallow nocturnal surface inversion layers. Latent heat flux divergence also occurat at the mountain surface and the sea surface.