MPG

The MPI-Mainz UV/VIS Spectral Atlas

of Gaseous Molecules of Atmospheric Interest

Hannelore Keller-Rudek1, Geert K. Moortgat2, Rolf Sander2, Rüdiger Sörensen1

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1Satellite Group

2Atmospheric Chemistry Division

Max-Planck Institute for Chemistry
Mainz, Germany


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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


Cross Sections / Halogeno-alkanes+radicals / Iodoalkanes(C,H,F,Cl,Br,I) / CH3I / Roehl(1997)_210K_200-350nm

DATAFILE: CH3I_Roehl(1997)_210K_200-350nm.txt
NAME: iodomethane, methyl iodide
FORMULA: CH3I
AUTHOR(YEAR): Roehl(1997)
T: 210K
λ: 200-350nm
BIBLIOGRAPHY: C.M. Roehl, J.B. Burkholder, G.K. Moortgat, A.R. Ravishankara, and P.J. Crutzen, "Temperature dependence of UV absorption cross sections and atmospheric implications of several alkyl iodides", J. Geophys. Res. 102(D11), 12819-12829 (1997); DOI: 10.1029/97JD00530
COMMENTS: Absorption measurements at 210, 225, 250, 275, and 298 K with a spectral resolution of 0.5 nm using a diode array spectrometer

Second-order polynomial fit of the temperature dependence (210-298 K):

σ(λ, T) = σ(298 K) [1 + a1(T - 298) + a2(T - 298)2] with

--------------------------------
λ    103 a1 105 a2
(nm)  (K-1)   (K-2)
--------------------------------
200  6.25   2.62
205  8.43   4.87
210  3.07   2.42
215  2.61   2.28
220  1.06   1.22
225  1.74   1.96
230  1.47   1.67
235  1.91   2.04
240  1.74   2.06
245  1.52   2.15
250  1.20   2.11
255  0.890  1.95
260  0.882  1.93
265  1.21   2.00
270  1.77   2.11
275  2.52   2.12
280  3.62   2.24
285  4.84   2.38
290  6.14   2.57
295  7.27   2.91
300  7.82   3.53
305  7.82   3.85
310  7.37   3.71
315  6.98   3.47
320  7.39   3.54
325  7.23   2.82
330  8.93   3.74
335 10.88  4.88
340 11.30  4.46
345 15.68  8.44
350 15.94  8.22

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