When referring to the Spectral Atlas, please cite our publication:
Keller-Rudek, H., Moortgat, G. K., Sander, R., and Sörensen,
R.: The MPI-Mainz UV/VIS spectral atlas of gaseous molecules of
atmospheric interest, Earth Syst. Sci. Data, 5, 365–373, (2013),
DOI: 10.5194/essd-5-365-2013
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| DATAFILE: | CH3Br_GillotaySimon(1987,1988)_250K_180-280nm(2nm).txt |
| NAME: | bromomethane, methyl bromide |
| FORMULA: | CH3Br |
| AUTHOR(YEAR): | GillotaySimon(1987,1988) |
| T: | 250K |
| λ: | 180-280nm(2nm) |
| BIBLIOGRAPHY: |
D. Gillotay and P.C. Simon, "Ultraviolet absorption cross-sections of methyl bromide at stratospheric temperatures",
Aeronomica Acta A 320, 1-17 (1987); Annales Geophysicae 6, 211-215 (1988)
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| COMMENTS: | Absorption measurements at 210 to 295 K using a single-beam equipment with a maximum resolution of 0.015 nm Selected values at 2-nm intervals
Data also in
D. Gillotay, P.C. Simon, and L. Dierickx, Temperature dependence of ultraviolet absorption cross-sections of brominated methanes and ethanes, in Quadrennial Ozone Symposium, Göttingen, RFA, 1988; Aeronomica Acta A 335, 1-25 (1988) and in the review article of
D. Gillotay and P.C. Simon, "Ultraviolet absorption cross-sections of photoactive species of stratospheric interest. Part 1: The Halocarbons", Aeronomica Acta A 356, 1-173 (1990)
Parameterization of the temperature dependence (210-300 K, 210-290 nm) using an empirical polynomial expansion:
log10 σ(λ, T) = ∑An λn + (T–273) × ∑Bnλn, n = 0-4
with the following parameters A and Bn
A0 = 7.997 B0 = 0.457415
A1 = –0.889724 B1 = –0.00882996
A2 = 0.00838084 B2 = 6.40235 × 10–5
A3 = –3.03191 × 10–5 B3 = –2.06827 × 10–7
A4 = 3.69427 × 10–8 B4 = 2.51393 × 10–10
These parameters, which differ from those reported by Gillotay and Simon, have been obtained by a re-fit ot their data and are the recommended values in the JPL-2015 recommendation |
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