High spectral resolution solar absorption measurements of ethylene in a forest fire smoke plume using HITRAN parameters: Tropospheric vertical profile retrieval
✍ Scribed by Curtis P. Rinsland; Clare Paton-Walsh; Nicholas B. Jones; David W.T. Griffith; Aaron Goldman; Stephen W. Wood; Linda Chiou; Arndt Meier
- Publisher
- Elsevier Science
- Year
- 2005
- Tongue
- English
- Weight
- 417 KB
- Volume
- 96
- Category
- Article
- ISSN
- 0022-4073
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✦ Synopsis
The tropospheric mixing ratio profile of ethylene ðC 2 H 4 Þ has been retrieved from a high spectral resolution ground-based infrared solar absorption spectrum. The spectrum was recorded during intense fires in New South Wales, Australia on January 1, 2002, and was analyzed with the C 2 H 4 spectral parameters added to the 2000 HITRAN compilation. Absorption by C 2 H 4 in the smoke-affected spectrum extends over a broad spectral range in a region with observable rotational fine structure. The fine structure occurs in addition to the 949:5 cm À1 n 7 band Q branch that is traditionally used to quantify C 2 H 4 amounts from infrared atmospheric measurements assuming room temperature laboratory absorption coefficients. The measured spectrum is fitted to near the noise level with a retrieved vertical column of ð3:8 AE 0:2Þ Â 10 17