Effect of line mixing on atmospheric brightness temperatures near 15 microm.
Effect of line mixing on atmospheric brightness temperatures near 15 microm.
复制标题
线混合对 15 微米附近大气亮度温度的影响。
作者：
L. Strow;D. Reuter
本文计算了CO（2）的15 μ m nu（2）Q分支区域谱线混合对地球有效黑体亮温的影响。用于计算线混合的程序遵循那些用于成功地模拟在两个近红外CO（2）Q分支的实验室光谱中观察到的混合。计算的大气辐射度在664和670 cm（-1）之间，这是一个对探测对流层上部和平流层感兴趣的光谱区域。混合被发现降低所观察到的亮度温度高达3 K的一些温度曲线。忽略这一影响将严重影响先进探测器进行温度反演的能力，而温度反演符合1 K/km的预测精度要求。
The effect of line mixing on the effective blackbody brightness temperature of the earth in the region of the 15microm nu (2)Q branch of CO(2) is calculated. The procedures used to compute line mixing follow those used to successfully model mixing observed in laboratory spectra of two near-infrared CO(2)Q branches. The atmospheric radiances are calculated between 664 and 670 cm(-1), a spectral region that is of interest for sounding the upper troposphere and the stratosphere. Mixing was found to lower the observed brightness temperatures by as much as 3 K for some temperature profiles. Ignoring this effect would significantly impact the ability of advanced sounders to produce temperature retrievals which meet the projected accuracy requirement of 1 K/km.