Seasonal and latitudinal variation of atmospheric methane: a ground-based and ship-borne solar IR spectroscopic study

T Warneke; J.F. Meirink; P. Bergamaschi; J.U. Grooss; J Notholt; G.C. Toon; V. Velazco; A.P.H. Goede; O. Schrems

Seasonal and latitudinal variation of atmospheric methane: a ground-based and ship-borne solar IR spectroscopic study

T Warneke, J.F. Meirink, P. Bergamaschi, J.U. Grooss, J Notholt, G.C. Toon, V. Velazco, A.P.H. Goede, O. Schrems

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Abstract

Column-averaged volume mixing ratios of CH4 were retrieved with a precision of better than 0.5% from infrared solar absorption spectra obtained at Ny-Alesund (Spitsbergen, 79 N) between 1997 and 2004 and during two ship cruises (54 N–34 S) on the Atlantic in 2003. The retrieval has been performed in a spectral region available to all operational FTIR (Fourier Transform InfraRed) spectrometers performing solar absorption measurements. The seasonality and the long-term increase of the tropospheric volume-mixing ratio, derived from the infrared measurements agree well with data from surface sampling at this site. The latitudinal variation of shipborne measurements between 54 N and 34 S is in agreement with inverse model simulations which are optimized vs. the global NOAA/ESRL measurements.

Original language	Undefined/Unknown
Pages (from-to)	L14812/1-L14812/5
Number of pages	5
Journal	Geophysical Research Letters
Volume	33
Publication status	Published - 2006

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2006GL025874
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Cite this

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title = "Seasonal and latitudinal variation of atmospheric methane: a ground-based and ship-borne solar IR spectroscopic study",

abstract = "Column-averaged volume mixing ratios of CH4 were retrieved with a precision of better than 0.5% from infrared solar absorption spectra obtained at Ny-Alesund (Spitsbergen, 79 N) between 1997 and 2004 and during two ship cruises (54 N–34 S) on the Atlantic in 2003. The retrieval has been performed in a spectral region available to all operational FTIR (Fourier Transform InfraRed) spectrometers performing solar absorption measurements. The seasonality and the long-term increase of the tropospheric volume-mixing ratio, derived from the infrared measurements agree well with data from surface sampling at this site. The latitudinal variation of shipborne measurements between 54 N and 34 S is in agreement with inverse model simulations which are optimized vs. the global NOAA/ESRL measurements.",

author = "T Warneke and J.F. Meirink and P. Bergamaschi and J.U. Grooss and J Notholt and G.C. Toon and V. Velazco and A.P.H. Goede and O. Schrems",

year = "2006",

language = "Undefined/Unknown",

volume = "33",

pages = "L14812/1--L14812/5",

journal = "Geophysical Research Letters",

issn = "0094-8276",

publisher = "John Wiley and Sons Inc.",

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TY - JOUR

T1 - Seasonal and latitudinal variation of atmospheric methane: a ground-based and ship-borne solar IR spectroscopic study

AU - Warneke, T

AU - Meirink, J.F.

AU - Bergamaschi, P.

AU - Grooss, J.U.

AU - Notholt, J

AU - Toon, G.C.

AU - Velazco, V.

AU - Goede, A.P.H.

AU - Schrems, O.

PY - 2006

Y1 - 2006

N2 - Column-averaged volume mixing ratios of CH4 were retrieved with a precision of better than 0.5% from infrared solar absorption spectra obtained at Ny-Alesund (Spitsbergen, 79 N) between 1997 and 2004 and during two ship cruises (54 N–34 S) on the Atlantic in 2003. The retrieval has been performed in a spectral region available to all operational FTIR (Fourier Transform InfraRed) spectrometers performing solar absorption measurements. The seasonality and the long-term increase of the tropospheric volume-mixing ratio, derived from the infrared measurements agree well with data from surface sampling at this site. The latitudinal variation of shipborne measurements between 54 N and 34 S is in agreement with inverse model simulations which are optimized vs. the global NOAA/ESRL measurements.

AB - Column-averaged volume mixing ratios of CH4 were retrieved with a precision of better than 0.5% from infrared solar absorption spectra obtained at Ny-Alesund (Spitsbergen, 79 N) between 1997 and 2004 and during two ship cruises (54 N–34 S) on the Atlantic in 2003. The retrieval has been performed in a spectral region available to all operational FTIR (Fourier Transform InfraRed) spectrometers performing solar absorption measurements. The seasonality and the long-term increase of the tropospheric volume-mixing ratio, derived from the infrared measurements agree well with data from surface sampling at this site. The latitudinal variation of shipborne measurements between 54 N and 34 S is in agreement with inverse model simulations which are optimized vs. the global NOAA/ESRL measurements.

M3 - Article

SN - 0094-8276

VL - 33

SP - L14812/1-L14812/5

JO - Geophysical Research Letters

JF - Geophysical Research Letters

ER -