Articles | Volume 13, issue 5
https://doi.org/10.5194/amt-13-2335-2020
https://doi.org/10.5194/amt-13-2335-2020
Research article
 | 
13 May 2020
Research article |  | 13 May 2020

Atmospheric observations of the water vapour continuum in the near-infrared windows between 2500 and 6600 cm−1

Jonathan Elsey, Marc D. Coleman, Tom D. Gardiner, Kaah P. Menang, and Keith P. Shine

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Cited articles

Baranov, Y. I.: The continuum absorption in H2O+N2 mixtures in the 2000–3250 cm−1 spectral region at temperatures from 326 to 363 K, J. Quant. Spectrosc. Ra., 112, 2281–2286, https://doi.org/10.1016/j.jqsrt.2011.06.005, 2011. 
Baranov, Y. I. and Lafferty, W. J.: The water-vapor continuum and selective absorption in the 3–5 µm spectral region at temperatures from 311 to 363 K, J. Quant. Spectrosc. Ra., 112, 1304–1313, https://doi.org/10.1016/j.jqsrt.2011.01.014, 2011. 
Baranov, Y. I. and Lafferty, W. J.: The water vapour self-and water–nitrogen continuum absorption in the 1000 and 2500 cm−1 atmospheric windows, Philos. T. Roy. Soc. A,, 370, 2578–2589, 2012. 
BIPM: Le système international d'unités (SI), BIPM (Organisation Intergouvernementale de la Convention du Mètre, available at: https://www.bipm.org/utils/common/pdf/si_brochure_8_en.pdf (last access: 7 May 2020), 2006. 
Box, M. A. and Deepak, A.: Atmospheric scattering corrections to solar radiometry, Appl. Opt., 18, 1941, https://doi.org/10.1364/ao.18.001941, 1979. 
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Short summary
Water vapour is an important component in trying to understand the flows of energy between the Sun and Earth, since it is opaque to radiation emitted by both the surface and the Sun. In this paper, we study how it absorbs sunlight by way of its continuum, a property which is poorly understood and with few measurements. Our results indicate that this continuum absorption may be more significant than previously thought, potentially impacting satellite observations and climate studies.
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