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The foreign-continuum absorption of water vapour in the far-infrared (50–500 cm−1)
- Source :
- Journal of Quantitative Spectroscopy and Radiative Transfer, Journal of Quantitative Spectroscopy and Radiative Transfer, Elsevier, 2021, 261, pp.107486. ⟨10.1016/j.jqsrt.2020.107486⟩
- Publication Year :
- 2021
- Publisher :
- HAL CCSD, 2021.
-
Abstract
- We investigated the continuum absorption of water vapour diluted in nitrogen, oxygen and air in the range of the pure rotational band of the water molecule (50-500 cm−1). Spectra recordings were performed at room temperature with a Fourier transform spectrometer associated to a 151-m multipass gas cell located at the AILES beamline of SOLEIL synchrotron facility. The study includes the first laboratory measurements in the wide 90-330 cm−1 interval. Tests of the baseline stability, crucial for the continuum determination, are reported together with the expected pressure dependences of the continuum absorption, measured over different pressure ramps. Retrieved foreign-continuum cross-sections are found in good agreement with literature values available in the lower and upper parts of the studied frequency range. The reported results validate the MT_CKD foreign-continuum empirical model, widely used in atmospheric applications, even if some overestimation of the MT_CKD values is noted in the centre of the band where experimental data were absent.
- Subjects :
- [PHYS.PHYS.PHYS-OPTICS]Physics [physics]/Physics [physics]/Optics [physics.optics]
Radiation
Materials science
Terahertz gap
010504 meteorology & atmospheric sciences
Continuum (design consultancy)
Analytical chemistry
chemistry.chemical_element
01 natural sciences
Nitrogen
Atomic and Molecular Physics, and Optics
Spectral line
Synchrotron
law.invention
Beamline
chemistry
Far infrared
law
Spectroscopy
Water vapor
ComputingMilieux_MISCELLANEOUS
0105 earth and related environmental sciences
Subjects
Details
- Language :
- English
- ISSN :
- 00224073
- Database :
- OpenAIRE
- Journal :
- Journal of Quantitative Spectroscopy and Radiative Transfer, Journal of Quantitative Spectroscopy and Radiative Transfer, Elsevier, 2021, 261, pp.107486. ⟨10.1016/j.jqsrt.2020.107486⟩
- Accession number :
- edsair.doi.dedup.....0dce6ae922ea514569be045854c19d3e