The simplest model for this phenomenon was develop
The simplest model for this phenomenon was developed by Dewar and is known as the PGT  equation. When this feature is particularly strong in lakes, it can result in (*) shearing forces which cause oscillations between the epilimnion and hypolimnion, and vertical displacement of it can be caused by cyclones. Coinciding with the pycnocline, it's the layer past which density increases rapidly with depth.  For 10 points― name this layer of water which marks a rapid decrease of temperature with depth.
The simplest model for this phenomenon was developed by Dewar and is known as the PGT  equation.
thermocline