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The hurricane as a Carnot heat engine

see for details

AB:

air undergoes isothermal expansion as it flows toward the lower pressure

of the storm center while in contact with the surface of the ocean (heat bath @ Ts300K)

BC:

Adiabatic (very fast) ascent of the air

air flows out at the top of its trajectory and is incorporated from the extreme low pressure

region into other weather systems via an isothermal compression (heat bath @ T0200K)

CD:

DA:

air undergoes an adiabatic compression when loosing altitude fast

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