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Atmospheric constraints on global emissions of methane from plants

Houweling, S. and Röckmann, T. and Aben, I. and Keppler, F. and Krol, M. and Meirink, J. F. and Dlugokencky, E. J. and Frankenberg, C. (2006) Atmospheric constraints on global emissions of methane from plants. Geophysical Research Letters, 33 (15). Art. No. L15821 . ISSN 0094-8276. doi:10.1029/2006GL026162.

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We investigate whether a recently proposed large source of CH_4 from vegetation can be reconciled with atmospheric measurements. Atmospheric transport model simulations with and without vegetation emissions are compared with background CH_4, δ^(13)C-CH_4 and satellite measurements. For present–day CH_4 we derive an upper limit to the newly discovered source of 125 Tg CH_4 yr^(−1). Analysis of preindustrial CH_4, however, points to 85 Tg CH_4 yr^(−1) as a more plausible limit. Model calculations with and without vegetation emissions show strikingly similar results at background surface monitoring sites, indicating that these measurements are rather insensitive to CH_4 from plants. Simulations with 125 Tg CH_4 yr^(−1) vegetation emissions can explain up to 50% of the previously reported unexpectedly high CH_4 column abundances over tropical forests observed by SCIAMACHY. Our results confirm the potential importance of vegetation emissions, and call for further research.

Item Type:Article
Related URLs:
URLURL TypeDescription DOIArticle
Houweling, S.0000-0002-6189-1009
Röckmann, T.0000-0002-6688-8968
Krol, M.0000-0002-3506-2477
Dlugokencky, E. J.0000-0003-0612-6985
Frankenberg, C.0000-0002-0546-5857
Additional Information:© 2006 American Geophysical Union. Received 27 February 2006; revised 1 June 2006; accepted 12 June 2006; published 15 August 2006. We thank the SCIAMACHY and ENVISAT teams who have participated in the planning, building, launching and operating of the SCIAMACHY instrument. Further, we thank SARA for the use of their high performance computing facilities.
Issue or Number:15
Record Number:CaltechAUTHORS:20150512-093352798
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Official Citation:Houweling, S., T. Röckmann, I. Aben, F. Keppler, M. Krol, J. F. Meirink, E. J. Dlugokencky, and C. Frankenberg (2006), Atmospheric constraints on global emissions of methane from plants, Geophys. Res. Lett., 33, L15821, doi:10.1029/2006GL026162.
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:57439
Deposited By: Tony Diaz
Deposited On:12 May 2015 17:40
Last Modified:10 Nov 2021 21:12

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