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first ground-based infrared solar absorption measurements of free tropospheric methanol (ch3oh): multidecade infrared time series from kitt peak (31.9 deg n 111.6 deg w): trend, seasonal cycle, and comparison with previous measurementsAtmospheric CH3OH (methanol) free tropospheric (2.09-14-km altitude) time series spanning 22 years has been analyzed on the basis of high-spectral resolution infrared solar absorption spectra of the strong vs band recorded from the U.S. National Solar Observatory on Kitt Peak (latitude 31.9degN, 111.6degW, 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.
Document ID
20090037108
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Rinsland, Curtis P.
(NASA Langley Research Center Hampton, VA, United States)
Mahieu, Emmanuel
(Liege Univ. Belgium)
Chiou, Linda
(Science Systems and Applications, Inc. Lanham, MD, United States)
Herbin, Herve
(Lille Univ. France)
Date Acquired
August 24, 2013
Publication Date
February 27, 2009
Publication Information
Publication: Journal of Geophysical Research
Volume: 114
ISSN: 0014-0227
Subject Category
Geophysics
Report/Patent Number
LF99-9567
Distribution Limits
Public
Copyright
Other