Article (Scientific journals)
First ground-based infrared solar absorption measurements of free tropospheric methanol (CH3OH): Multidecade infrared time series from Kitt Peak (31.9°N 111.6°W), trend, seasonal cycle, and comparison with previous measurements
Rinsland, Curtis P.; Mahieu, Emmanuel; Chiou, Linda et al.
2009In Journal of Geophysical Research, 114 (D04309)
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Keywords :
methanol; atmospheric composition; infrared spectroscopy; tropospheric chemistry
Abstract :
[en] Atmospheric CH3OH (methanol) free tropospheric (2.09-14 km altitude) time series spanning 22 years has been analyzed based on high spectral resolution infrared solar absorption spectra of the strong ν8 band recorded from the U.S. National Solar Observatory on Kitt Peak (latitude 31.9°N, 111.6°W, 2.09 km altitude) with a 1-m Fourier transform spectrometer (FTS). The measurements span October 1981 to December 2003 and are the first long time series of CH3OH measurements obtained from the ground. The results were analyzed with SFIT2 version 3.93 and show a factor of three variations with season, a maximum at the beginning of July, a winter minimum, and no statistically significant long-term trend over the measurement time span.
Disciplines :
Earth sciences & physical geography
Author, co-author :
Rinsland, Curtis P.
Mahieu, Emmanuel  ;  Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Groupe infra-rouge de phys. atmosph. et solaire (GIRPAS)
Chiou, Linda
Herbin, Hervé
Language :
English
Title :
First ground-based infrared solar absorption measurements of free tropospheric methanol (CH3OH): Multidecade infrared time series from Kitt Peak (31.9°N 111.6°W), trend, seasonal cycle, and comparison with previous measurements
Publication date :
27 February 2009
Journal title :
Journal of Geophysical Research
ISSN :
0148-0227
eISSN :
2156-2202
Publisher :
American Geophysical Union, Washington, United States - District of Columbia
Volume :
114
Issue :
D04309
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 01 April 2009

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