Ground‐based remote sensing of methane height profiles with a tunable diode laser heterodyne spectrometer | Zendy

Koide M. | Zendy; Taguchi M. | Zendy; Fukunishi H. | Zendy; Okano S. | Zendy

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Ground‐based remote sensing of methane height profiles with a tunable diode laser heterodyne spectrometer

Author(s) -

Koide M.,

Taguchi M.,

Fukunishi H.,

Okano S.

Publication year - 1995

Publication title -

geophysical research letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.007

H-Index - 273

eISSN - 1944-8007

pISSN - 0094-8276

DOI - 10.1029/95gl00051

Subject(s) - stratosphere , troposphere , spectrometer , methane , mixing ratio , heterodyne (poetry) , tunable diode laser absorption spectroscopy , materials science , absorption spectroscopy , wavenumber , absorption (acoustics) , volume (thermodynamics) , atmospheric methane , laser , spectral line , atmospheric sciences , analytical chemistry (journal) , environmental science , optics , tunable laser , physics , chemistry , organic chemistry , quantum mechanics , chromatography , acoustics , astronomy

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 −1 . 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°N, 140.1°E) on December 17 and 20, 1991.

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