Stratospheric measurements of collision‐induced absorption by molecular oxygen

Rinsland, C. P.; Smith, Mary Ann H.; Seals, R. K.; Goldman, A.; Murcray, F. J.; Murcray, D. G.; Larsen, J. C.; Rarig, P. L.

doi:10.1029/jc087ic04p03119

Cited by 27 publications

(15 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As in the study by Rinsland et al [1982], the "noncontinuum" absorption by H20 has been calculated here assuming the simple Lorentz expression for the far-wing line shape where/3 is the H20 volume mixing ratio in the layer. The H20 line parameters in the ATMOS line list [Brown et al, 1987] have been adopted.…”

Section: Continuummentioning

confidence: 99%

Stratospheric infrared continuum absorptions observed by the ATMOS instrument

Rinsland¹,

Zander

Namkung³

et al. 1989

J. Geophys. Res.

Self Cite

View full text Add to dashboard Cite

A quantitative analysis of continuum absorptions in the lower stratosphere is reported based on infrared solar absorption spectra recorded in the occultation mode at 0.01 cm−1 resolution. The spectra were obtained during seven sunrises near 48°S latitude and 12 sunsets near 28°N latitude with the atmospheric trace molecule spectroscopy (ATMOS) Fourier transform spectrometer operating April 29 to May 1, 1985, on board the shuttle/Spacelab 3 platform. Continuous absorption produced primarily by the collision‐induced fundamental vibration‐rotation band of O2 and to a lesser extent by the superposition of H2O far line wings has been observed in the 1400‐ to 1800‐cm−1 interval below tangent heights of about 25 km. Continuum optical depths measured in microwindows nearly free of atmospheric line absorption are 0.78±0.06 times those calculated with the O2 absorption coefficients of Timofeyev and Tonkov (1978). This difference is consistent with previous measurements, but more than a factor of 2 improvement in accuracy has been achieved. Transmittance measurements in microwindows between 2395 and 2535 cm−1 have been used to study continuous absorption from the collision‐induced fundamental vibration‐rotation band of N2 and the far wings of strong CO2 lines (primarily those of the ν3 fundamental). Below about 2430 cm−1 there is fair agreement between the measurements and calculations based on published absorption coefficients for both N2 and CO2; at higher wave numbers, where absorption by N2 is dominant, the calculated absorption exceeds the measured absorption. The measured transmittances have been analyzed to derive best fit absorption coefficients for the N2 pressure‐induced band at lower stratospheric temperatures (∼210 K). An absorption peak has been detected near 1200 cm−1 and is believed to result from extinction by the H2SO4 stratospheric aerosol layer.

show abstract

Section: Continuummentioning

confidence: 99%

Stratospheric infrared continuum absorptions observed by the ATMOS instrument

Rinsland¹,

Zander

Namkung³

et al. 1989

J. Geophys. Res.

Self Cite

View full text Add to dashboard Cite

show abstract

“…This effect is strongly modulated by the atmospheric water vapor content since the O 2 spectral signature is situated in the same spectral region as one of the most important H 2 O infrared absorption bands (n 2 bending). In the atmosphere the infrared signal of O 2 has first been detected through balloon-borne limb-sounding observations [Rinsland et al, 1982].…”

Section: Introductionmentioning

confidence: 99%

The natural greenhouse effect of atmospheric oxygen (O₂) and nitrogen (N₂)

Höpfner¹,

Milz²,

Buehler³

et al. 2012

Geophysical Research Letters

View full text Add to dashboard Cite

[1] The effect of collision-induced absorption by molecular oxygen (O 2 ) and nitrogen (N 2 ) on the outgoing longwave radiation (OLR) of the Earth's atmosphere has been quantified. We have found that on global average under clear-sky conditions the OLR is reduced due to O 2 by 0.11 Wm À2 and due to N 2 by 0.17 Wm À2 . Together this amounts to 15% of the OLR-reduction caused by CH 4 at present atmospheric concentrations. Over Antarctica the combined effect of O 2 and N 2 increases on average to about 38% of CH 4 with single values reaching up to 80%. This is explained by less interference of H 2 O spectral bands on the absorption features of O 2 and N 2 for dry atmospheric conditions.

show abstract

“…We then give the details 1 To whom correspondence should be addressed. of the calculations for O 2 -CO 2 and O 2 -N 2 and compare our results to the recent, most accurate experimental results.…”

Section: Introductionmentioning

confidence: 99%

“…The collision-induced fundamental band of oxygen is important from a historical as well as a practical viewpoint, because of the absorption in long-path measurements through the Earth's atmosphere (1,2). Historically, this was the system in which collision-induced absorption (CIA) was first identified by Welsh and co-workers in 1949 (3).…”

Section: Introductionmentioning

confidence: 99%