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首页> 外文期刊>Journal of Geophysical Research. Biogeosciences >MIPAS USED AS A NONLOCAL THERMODYNAMIC EQUILIBRIUM SOUNDER FOR NO 5.3 MU-M BAND
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MIPAS USED AS A NONLOCAL THERMODYNAMIC EQUILIBRIUM SOUNDER FOR NO 5.3 MU-M BAND

机译：MIPAS用作5.3 MU-M频段的非局部热力学平衡测深仪

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摘要

The spaceborne MIPAS experiment has been numerically simulated in the 5.3 mu m spectral domain, and the possible nonlocal thermodynamic equilibrium (non-LTE) emissions from NO have been investigated. The interfering non-LTE contributions from H2O, CO2, and O-3 to atmospheric limb radiances have been estimated. The results have shown a negligibly small non-LTE interference from H2O, CO2, and O-3 but a considerable non LTE effect from NO in the stratosphere. The inverse problem has been formulated for the retrieval of the NO vertical profile and the vibrational temperatures of the NO lower vibrational states. The optimal estimation technique has been selected as a tool for the evaluation of the retrieval accuracy of NO number density and vibrational temperature vertical profiles, The error matrix calculations have shown that the retrieval accuracy for NO concentration is 30-40% in the altitude region 10-50 km in case of simultaneous retrieval of NO and vibrational temperature vertical profiles but can be improved by 10% if averaging of spectra is performed to achieve low noise. The retrieval accuracy for the vibrational temperatures of the X1/2-1 and X3/2-1 states was estimated to be better than 10 K in the stratosphere, but for the states X1/2-2 and X3/2-2, it appeared to be rather poor. The problem of NO vertical profile retrieval in the non-LTE atmosphere is discussed. It was shown that in order to obtain a reasonable accuracy of NO retrieval of 20% up to 50 km altitude, it is necessary that the a priori uncertainty of the vibrational temperature df the state X1/2-1 is not higher than 5 K. [References: 25]
机译：已在5.3μm的光谱域内对星载MIPAS实验进行了数值模拟，并研究了NO可能产生的非局部热力学平衡（non-LTE）排放。已经估计了H2O，CO2和O-3对大气肢体辐射的非LTE干扰影响。结果表明，来自H2O，CO2和O-3的非LTE干扰小到可以忽略不计，但是来自平流层NO的非LTE效应却相当大。已经提出了反问题以求取NO垂直分布和NO较低振动状态的振动温度。选择了最佳估计技术作为评估NO数密度和振动温度垂直剖面反演精度的工具。误差矩阵计算表明，在海拔10范围内，NO浓度的反演精度为30-40％。在同时获取NO和振动温度垂直剖面的情况下为-50 km，但如果对光谱进行平均以实现低噪声，则可以提高10％。估计平流层中X1 / 2-1和X3 / 2-1态的振动温度的检索精度优于10 K，但是对于X1 / 2-2和X3 / 2-2态的振动温度，其检索精度优于10K。看起来很穷。讨论了非LTE环境中NO垂直剖面检索的问题。结果表明，为了在50 km的高度上获得20％的NO回收的合理精度，状态X1 / 2-1的振动温度df的先验不确定性必须不大于5 K. [参考：25]

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