PREDICTION OF THE ANNUAL CYCLE OF THE TEMPERATURE CHANGES IN A STRATIFIED LAKE

Abstract

A one-dimensional mathematical model is proposed to describe thermal stratification in lakes. The vertical diffusion coefficient is formulated in terms of wind velocity and the gradient Richardson number. Heat exchange through the air-water interface can be calculated from the observed daily averaged meteorological data. This model is validated for simulation of temperature field observed in Lake Chuzenji. Calculated results of the thermal structure of the lake showed good agreement with the observed data. Effect of wind velocity on the thermocline formation is also evaluated.