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| Titel |
New and improved infrared absorption cross sections for dichlorodifluoromethane (CFC-12) |
| VerfasserIn |
J. J. Harrison |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1867-1381
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| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Measurement Techniques ; 8, no. 8 ; Nr. 8, no. 8 (2015-08-12), S.3197-3207 |
| Datensatznummer |
250116524
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| Publikation (Nr.) |
 copernicus.org/amt-8-3197-2015.pdf |
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| Zusammenfassung |
| Despite its widespread commercial use throughout the twentieth century,
primarily in the refrigeration industry, dichlorodifluoromethane (CFC-12) is
now known to have the undesirable effect of depleting stratospheric ozone.
As this long-lived molecule slowly degrades in the atmosphere, monitoring
its vertical concentration profile using infrared sounders on satellite
platforms crucially requires accurate laboratory spectroscopic data. This
work describes new high-resolution infrared absorption cross sections of
dichlorodifluoromethane over the spectral range 800–1270 cm−1,
determined from spectra recorded using a high-resolution Fourier transform
spectrometer (Bruker IFS 125HR) and a 26 cm pathlength cell. Spectra of
dichlorodifluoromethane/dry synthetic air mixtures were recorded at
resolutions between 0.01 and 0.03 cm−1 (calculated as 0.9/MOPD; MOPD = maximum
optical path difference) over a range of temperatures and
pressures (7.5–761 Torr and 190–294 K) appropriate for atmospheric
conditions. This new cross-section dataset improves upon the one currently
available in the HITRAN and GEISA databases. |
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