光学学报, 2018, 38 (12): 1201002, 网络出版: 2019-05-10  

极光对中高层大气临边红外辐射影响的模拟分析 下载: 696次

Simulation Analysis on Effect of Aurora on Limb Infrared Radiation of Middle and Upper Atmosphere
刘栋 1,2,*戴聪明 1,*唐超礼 1,2魏合理 1,2
作者单位
1 中国科学院安徽光学精密机械研究所中国科学院大气光学重点实验室, 安徽 合肥 230031
2 中国科学技术大学研究生院科学岛分院, 安徽 合肥 230026
摘要
利用中高层大气红外辐射模式模拟分析极光对中高层大气临边红外辐射的影响。模拟结果表明,极光扰动大气时,NO导致2.7 μm、5.3 μm带临边辐亮度相比于静态值显著增大,2.7 μm带辐射不含时变化,5.3 μm带辐射含时小幅变化;CO2和NO+导致4.3 μm带临边辐亮度相比于静态值显著增大,CO2导致其含时变化;10 μm、15 μm带临边辐亮度因CO2 4.3 μm带的关联效应也以一定幅度增大,并同样含时变化。因化学反应产生的NO、NO+的高振动能级使2.7,4.3,5.3 μm带在包含它们的基带和热谱带的宽光谱范围内都获得增强。根据所获得的辐射特性,初步模拟了一次极光扰动大气的4.3 μm带临边观测事件,并与实测值进行对比分析,验证了中高层大气红外辐射模式的正确性。
Abstract
The effect of aurora on limb infrared radiation is simulated and analyzed with the infrared radiation model of the middle and upper atmosphere. The simulation results show that when aurora disturbs the atmosphere, the limb radiance at 2.7 μm and 5.3 μm resulted from NO is significantly larger than the quiescent value. In addition, the limb radiation at 2.7 μm is not time-dependent, but that at 5.3 μm has a small time-dependent variance. Moreover, the limb radiance at 4.3 μm resulted from CO2 and NO+ has the obvious increase compared with the quiescent value, and CO2 makes it time-dependent. The radiance at 10 μm and 15 μm is enhanced with a certain amplitude because of the linkage effect from limb radiance at CO2 4.3 μm and similarly the variance is also time-dependent. The chemical reactions introduce the high energy levels of NO and NO+ and thus the radiance at 2.7 μm, 4.3 μm, 5.3 μm gets enhanced at the broad spectral bands including their baseband and hot bands. The properties from the model analysis are applied to the preliminary simulation of an observation event of limb radiation at 4.3 μm when aurora disturbs the atmosphere. The simulation results are compared with the measured data and thus the correctness of the model is verified.

刘栋, 戴聪明, 唐超礼, 魏合理. 极光对中高层大气临边红外辐射影响的模拟分析[J]. 光学学报, 2018, 38(12): 1201002. Dong Liu, Congming Dai, Chaoli Tang, Heli Wei. Simulation Analysis on Effect of Aurora on Limb Infrared Radiation of Middle and Upper Atmosphere[J]. Acta Optica Sinica, 2018, 38(12): 1201002.

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