Ground-based remote sensing of methane height profiles with a tunable diode laser heterodyne spectrometer
Journal Article
·
· Geophysical Research Letters
- Tohoku Univ., Sendai (Japan)
Height distributions of methane in the troposphere and stratosphere were derived from high resolution absorption spectra observed with a ground-based tunable diode laser heterodyne spectrometer. The center wavenumber of the measured methane absorption line is 1223.1561/cm. In the retrieval of methane height profiles, a volume mixing ratio of methane was assumed to have a constant value in the troposphere and to decrease with a constant rate in the stratosphere. The tropospheric mixing ratio and the decreasing rate in stratosphere were derived to be 1.7 +/- 0.1 ppmv and -0.06 ppmv/km, respectively, for measurements at Tsukuba (36.0 deg N, 140.1 deg E) on December 17 and 20, 1991.
- OSTI ID:
- 57420
- Journal Information:
- Geophysical Research Letters, Vol. 22, Issue 4; Other Information: PBD: Feb 1995
- Country of Publication:
- United States
- Language:
- English
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