非平衡大气辐射强度与透过率的Line-By-Line计算模式

计算物理 ›› 1998, Vol. 15 ›› Issue (5): 620-628.

非平衡大气辐射强度与透过率的Line-By-Line计算模式

朱世德, 向安平

成都气象学院基础科学系 610041

收稿日期:1996-11-25 修回日期:1997-09-08 出版日期:1998-09-25 发布日期:1998-09-25

LINE-BY-LINE CALCULATION MODEL OF RADIANCE AND TRANSMITTANCE FOR THE NON-EQUILIBRIUM ATMOSPHERES

Zhu Shide, Xiang Anping

Department of Basic Sciences, Chengdu Institute of Meteorology, 610041

Received:1996-11-25 Revised:1997-09-08 Online:1998-09-25 Published:1998-09-25

摘要/Abstract

摘要： 导出了非局域热力学平衡(NLTE)大气辐射强度与透过率的基本公式,以及NLT和LTE的线强、光学厚度和透过率的关系。假设转动能级是热力学平衡(LTE)的,建立了一个精确的Line-by-LineNLTE辐射强度与透过率的有效算法来计算较高层行星大气红外活跃样品的辐射强度。计算了地球大气¹⁶O₃9.6μm带在白天、夜晚和NLTE、LTE条件下的临边光谱辐射强度、线积分辐射强度、带积分辐射强度和合成光谱辐射强度,揭示了NLTE辐射强度对LTE辐射强度有显著而重要的偏离。

关键词: 非局域热力学平衡(NLTE), 发射与透射, 辐射强度与透过率, Line-by-Line算法

Abstract: The basic formulas of the emission and transmission for non-local thermodynamic equlibrium(NLTE)planetary atmospheres are derived.By assuming that rotational levels within a vibrational level remain in thermodynamic equilibrium,an accurate and efficient line-by-line algorithm of NLTE emission and transmission is developed to evaluate the radiance due to infrared active species in the upper planetary atmospheres.The limb viewing spectral radiance,line integrated radiance,band integrated radiance and synthetic spectral radiance of the Earth's atmosphere for the 9.6μm bands of ¹⁶O₃ under daytime and nighttime and under NLTE and LTE conditions are calculated by using this algorithm.The results of calculations reveal that NLTE radiance obviously departs from LTE.

Key words: non-local thermodynamic equilibrium(NLTE), emission and transmission, radiance and transmittance, line-by-line algorithm

中图分类号:

P422.3
O242

朱世德, 向安平. 非平衡大气辐射强度与透过率的Line-By-Line计算模式[J]. 计算物理, 1998, 15(5): 620-628.

Zhu Shide, Xiang Anping. LINE-BY-LINE CALCULATION MODEL OF RADIANCE AND TRANSMITTANCE FOR THE NON-EQUILIBRIUM ATMOSPHERES[J]. CHINESE JOURNAL OF COMPUTATIONAL PHYSICS, 1998, 15(5): 620-628.