A Parameterization of Cooling Rate Calculation under the Non-LTE Condition: Multi-Level Model

Xun Zhu

doi:10.1007/BF02659075

Impact Factor: 5.8

Volume 6 Issue 4

Oct. 1989

Article Contents

Article > ADVANCES IN ATMOSPHERIC SCIENCES > 1989 > 6(4): 403-413

A Parameterization of Cooling Rate Calculation under the Non-LTE Condition: Multi-Level Model

Xun Zhu

1.
Program in Atmospheric and Oceanic Sciences, P.O. Box 308,Princeton University, Princeton, NJ 08542, USA

Xun Zhu

doi: 10.1007/BF02659075

Abstract
References
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Abstract:
Calculations of cooling rate by CO2 15 μm band in the earth’s upper mesosphere and lower thermosphere be-come very difficult because of the non-LTE. This is primarily due to the nonlinear vibration-vibrational (VV) transi-tion processes between CO2 molecules in different states. This paper suggests that the non-LTE source function be parameterized as a linear combination of two limiting source functions. One limiting source function neglects the VV transitions while the other limiting source function assumes VV transitions being dominant. These two limiting source functions can be derived by linear models. The parameterization schemes proposed here can be applied 10 the general circulation models including those non-LTE regions.
References

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Manuscript History

Manuscript received: 10 October 1989

Manuscript revised: 10 October 1989

通讯作者: 陈斌, bchen63@163.com

1.
沈阳化工大学材料科学与工程学院沈阳 110142

A Parameterization of Cooling Rate Calculation under the Non-LTE Condition: Multi-Level Model

Xun Zhu

1. Program in Atmospheric and Oceanic Sciences, P.O. Box 308,Princeton University, Princeton, NJ 08542, USA

Manuscript received: 1989-10-10
Manuscript revised: 1989-10-10

Abstract: Calculations of cooling rate by CO2 15 μm band in the earth’s upper mesosphere and lower thermosphere be-come very difficult because of the non-LTE. This is primarily due to the nonlinear vibration-vibrational (VV) transi-tion processes between CO2 molecules in different states. This paper suggests that the non-LTE source function be parameterized as a linear combination of two limiting source functions. One limiting source function neglects the VV transitions while the other limiting source function assumes VV transitions being dominant. These two limiting source functions can be derived by linear models. The parameterization schemes proposed here can be applied 10 the general circulation models including those non-LTE regions.