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New infrared absorption cross sections for the infrared limb sounding of sulfur hexafluoride (SF6)
Journal of Quantitative Spectroscopy and Radiative Transfer ( IF 2.3 ) Pub Date : 2020-07-07 , DOI: 10.1016/j.jqsrt.2020.107202
Jeremy J. Harrison

Sulfur hexafluoride (SF6), widely used in industry for electrical insulation, is a potent greenhouse gas with a steadily increasing atmospheric abundance. In order to monitor its concentration profiles using infrared sounders, accurate laboratory spectroscopic data are required. This work describes new high-resolution infrared absorption cross sections of pure and air-broadened sulfur hexafluoride over the spectral range 780 – 1100 cm−1, derived from spectra recorded using a high-resolution Fourier transform spectrometer (Bruker IFS 125HR) and a 26-cm-pathlength cell. Spectra were recorded at resolutions between 0.002 and 0.03 cm−1 (calculated as 0.9/MOPD; MOPD = maximum optical path difference) over a range of atmospherically relevant temperatures (189 – 294 K) and pressures (up to 751 Torr). These new absorption cross sections improve upon those previously used for remote sensing, and will provide a more accurate basis for retrievals in the future.



中文翻译:

六氟化硫(SF 6)红外肢体探测的新红外吸收截面

六氟化硫(SF 6)是工业上广泛用于电绝缘的物质,是一种有力的温室气体,其大气丰度不断增加。为了使用红外测深仪监测其浓度分布,需要准确的实验室光谱数据。这项工作描述了在780 – 1100 cm -1光谱范围内的纯净的和空气扩散的六氟化硫的高分辨率高分辨率红外吸收截面,这些截面是使用高分辨率傅里叶变换光谱仪(Bruker IFS 125HR)和26 -cm-pathlength单元格。以0.002至0.03 cm -1之间的分辨率记录光谱(以0.9 / MOPD计算; MOPD =最大光程差)在与大气有关的温度(189 – 294 K)和压力(高达751 Torr)的范围内。这些新的吸收截面改进了以前用于遥感的截面,并将为将来的检索提供更准确的基础。

更新日期:2020-07-07
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