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Large-Scale Controls of Methanogenesis Inferred from Methane and Gravity Spaceborne Data

Bloom, A. Anthony and Palmer, Paul I. and Fraser, Annemarie and Reay, David S. and Frankenberg, Christian (2010) Large-Scale Controls of Methanogenesis Inferred from Methane and Gravity Spaceborne Data. Science, 327 (5963). pp. 322-325. ISSN 0036-8075. http://resolver.caltech.edu/CaltechAUTHORS:20150512-091007483

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Abstract

Wetlands are the largest individual source of methane (CH_4), but the magnitude and distribution of this source are poorly understood on continental scales. We isolated the wetland and rice paddy contributions to spaceborne CH_4 measurements over 2003–2005 using satellite observations of gravity anomalies, a proxy for water-table depth Γ, and surface temperature analyses T_S. We find that tropical and higher-latitude CH_4 variations are largely described by Γ and T_S variations, respectively. Our work suggests that tropical wetlands contribute 52 to 58% of global emissions, with the remainder coming from the extra-tropics, 2% of which is from Arctic latitudes. We estimate a 7% rise in wetland CH_4 emissions over 2003–2007, due to warming of mid-latitude and Arctic wetland regions, which we find is consistent with recent changes in atmospheric CH_4.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1126/science.1175176 DOIArticle
http://www.sciencemag.org/content/327/5963/322PublisherArticle
http://www.sciencemag.org/content/327/5963/322/suppl/DC1PublisherSupplementary Material
ORCID:
AuthorORCID
Frankenberg, Christian0000-0002-0546-5857
Additional Information:© 2010 American Association for the Advancement of Science. 20 April 2009; accepted 11 November 2009. We thank J. Melack for providing feedback on the manuscript and R. Hipkin and F. Simons for assistance with GRACE gravity data. This work is funded by United Kingdom Natural Environmental Research Council studentship NE/F007973/1 and the National Centre for Earth Observation.
Funders:
Funding AgencyGrant Number
Natural Environment Research Council (NERC)NE/F007973/1
National Centre for Earth ObservationUNSPECIFIED
Record Number:CaltechAUTHORS:20150512-091007483
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20150512-091007483
Official Citation:Bloom, A. A., Palmer, P. I., Fraser, A., Reay, D. S., & Frankenberg, C. (2010). Large-Scale Controls of Methanogenesis Inferred from Methane and Gravity Spaceborne Data. Science, 327(5963), 322-325. doi: 10.1126/science.1175176
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:57435
Collection:CaltechAUTHORS
Deposited By: Jason Perez
Deposited On:13 May 2015 18:43
Last Modified:20 Feb 2016 00:27

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