The effect of interior motion on seasonal thermocline evolution. effectofinterior00garn Year: 1983 (w'T1 ), = - A () W e where the subscript, h, indicates the value of w'T' at z=-h, the base of the mixed layer. The variable, We is the entrainment rate and A T is the temperature jump across the entrainment zone at the base of th? mixed layer. The turbu- lent heat flux is linear with depth in the mixed layer (due to the assumption of a well-mixed layer), mcnotonically decreases with depth in the entrainment zone and is zero below. The profile of turbulent heat flux is shewn in Figure T

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The effect of interior motion on seasonal thermocline evolution. effectofinterior00garn Year: 1983 (w'T1 ), = - A () W e where the subscript, h, indicates the value of w'T' at z=-h, the base of the mixed layer. The variable, We is the entrainment rate and A T is the temperature jump across the entrainment zone at the base of th? mixed layer. The turbu- lent heat flux is linear with depth in the mixed layer (due to the assumption of a well-mixed layer), mcnotonically decreases with depth in the entrainment zone and is zero below. The profile of turbulent heat flux is shewn in Figure The net surface heat flux varies from positive Figure Turbulent Heat Flux Profile. to negative values according to equation (). The entrainment heat flux term, -Z^T rfa, is always negative or zero. This is because the entrainment rate is positive when the mixed layer is deepening but 'turns off' and is zero for non-entraining shallowing cases. The thickness of the 18

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