FURTHER STUDIES ON EVAPORATION-WIND FEEDBACK

Li Chongyin

Abstract:

The results from simple dynamic studies on the evaporation-wind feedback show that the effect cannot change the nature of tropical atmospheric waves (by retarding the speed), so that the evaporation-wind feedback alone cannot be an exciting mechanism of intraseasonal oscillation in the tropical atmosphere. This is different from that of the wave-CISK mechanism. With combined effect of the cumulus convection heating and evaporation-wind feedback, the CISK-Kelvin waves and CISK-Rossby waves will develop unstably, explaining the dynamic mechanism of tropical intraseasonal oscillation in a more complete and reasonable way than the convection heating alone. Therefore, the evaporation-wind feedback is also important to the intraseasonal oscillation in the tropical atmosphere.

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Li Chongyin. FURTHER STUDIES ON EVAPORATION-WIND FEEDBACK [J]. Journal of Tropical Meteorology, 1997, 3(1): 11-17.

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FURTHER STUDIES ON EVAPORATION-WIND FEEDBACK

LASG, Institute of Atmospheric Physics, Academia Sinica, Beijing 100080

Received Date: 1995-02-16

Rev Recd Date: 1995-05-29

Abstract: The results from simple dynamic studies on the evaporation-wind feedback show that the effect cannot change the nature of tropical atmospheric waves (by retarding the speed), so that the evaporation-wind feedback alone cannot be an exciting mechanism of intraseasonal oscillation in the tropical atmosphere. This is different from that of the wave-CISK mechanism. With combined effect of the cumulus convection heating and evaporation-wind feedback, the CISK-Kelvin waves and CISK-Rossby waves will develop unstably, explaining the dynamic mechanism of tropical intraseasonal oscillation in a more complete and reasonable way than the convection heating alone. Therefore, the evaporation-wind feedback is also important to the intraseasonal oscillation in the tropical atmosphere.

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Reference (10)

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FURTHER STUDIES ON EVAPORATION-WIND FEEDBACK

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