极光对中高层大气临边红外辐射影响的模拟分析  

Simulation Analysis on Effect of Aurora on Limb Infrared Radiation of Middle and Upper Atmosphere

作　　者：刘栋 戴聪明 唐超礼 魏合理 Liu Dong;Dai Congming;Tang Chaoli;Wei Heli(Key Laboratory of Atmospheric Optics,Anhui Institute of Optics and Fine Mechanics,Chinese Academy of Sciences Hefei,Anhui 230031,China;Science Island Branch of Graduate School,University of Science and Technology of China,Hefei,Anhui 230026,China)

机构地区：[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

出　　处：《光学学报》2018年第12期11-19,共9页Acta Optica Sinica

基　　金：国防基础科研计划项目(JCKY2016204C602);装备预研项目(41416020204)

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2.7μm、5.3μm带临边辐亮度相比于静态值显著增大,2.7μm带辐射不含时变化,5.3μm带辐射含时小幅变化;CO2和NO+导致4.3μm带临边辐亮度相比于静态值显著增大,CO2导致其含时变化;10μm、15μm带临边辐亮度因CO24.3μm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2.7,4.3,5.3μm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4.3μm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。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.

关 键 词：大气光学 中高层大气 极光 红外辐射 

分 类 号：O432.1[机械工程—光学工程]