NCEAS Project 10645

Toward an adequate quantification of CH4 emissions from land ecosystems: Integrating field and in-situ observations, satellite data, and modeling

  • Qianlai Zhuang
  • A. David McGuire
  • Jerry M. Melillo
  • Ronald G. Prinn

ActivityDatesFurther Information
Working Group13th—14th March 2006Participant List  
Working Group15th—16th March 2007Participant List  
Working Group13th—14th March 2008Participant List  
Working Group19th—20th March 2009Participant List  

Emissions of CH4 from natural and managed land ecosystems account for a significant source of greenhouse gases to the atmosphere. In recent decades, extensive field observations of CH4 emissions and atmospheric CH4 concentrations have been made during a time in which process-based and inversion modeling approaches have matured as powerful tools in estimating regional and global CH4 emissions. However, there are still substantial uncertainties in estimating CH4 exchange with the atmosphere. Much of this uncertainty arises from uncertainties in the extent of wetland distributions and incomplete understanding of the controls and mechanisms of methanogenesis, methanotrophy, and CH4 transport pathways to the atmosphere. Furthermore, there is variability in which factors control CH4 production and consumption in different natural and managed ecosystems. For example, in northern high latitudes, permafrost dynamics significantly influences emissions, while the seasonality of wetland extent is critical in determining emissions from tropical regions. For managed ecosystems (e.g., rice paddies), irrigation and fertilization significantly impact both methanogenesis and methanotrophy. Here we propose a Working Group to make progress in synthesis of CH4 dynamics through three activities: 1) to identify key issues in quantifying CH4 emissions from land ecosystems through conducting comparisons of model and field observations for different geographical locations and ecosystems; 2) to parameterize and extrapolate process-based models at regional and global scales and explore the uncertainty of CH4 emissions; and 3) to couple process-based estimates with inversion modeling approaches to constrain the uncertainty with air-borne, satellite, and in-situ observed datasets and to identify the factors, mechanisms, and controls to the uncertainty of emissions at large-scales.

TypeProducts of NCEAS Research
Data Set Crill, Patrick. 2008. Sallies Fen NH CH4 Flux 1994-2001. (Online version)
Journal Article Gauci, Vincent; Blake, Stephen; Stevenson, David S.; Highwood, Eleanor J. 2008. Halving of the northern wetland CH4 source by a large Icelandic volcanic eruption. Journal of Geophysical Research. Vol: 113. Pages G00A11.
Data Set Gauci, Vincent. 2008. Methane (CH4) flux data for Moidach More. Years 1997 - 1998. (Online version)
Journal Article Gauci, Vincent; Dise, Nancy B.; Howell, Graham; Jenkins, Meaghan E. 2008. Suppression of rice methane emission by sulfate deposition in simulated acid rain. Journal of Geophysical Research. Vol: 113. Pages G00A07.
Data Set Khalil, M. Aslam K. 2008. Khalil:CH4 and N2O Emissions From Sub-tropical Rice Agriculture In China. (Online version)
Data Set Khalil, M. Aslam K. 2008. Khalil: Production Oxidation Emissions Of CH4 from Rice Fields At Jinsha China. (Online version)
Journal Article Khalil, M. Aslam K.; Shearer, M. J.; Rasmussen, R. A.; Xu, Li; Liu, Jin-Luan. 2008. Methane and nitrous oxide emissions from subtropical rice agriculture in China. Journal of Geophysical Research. Vol: 113. Pages G00A05.
Data Set Khalil, M. Aslam K. 2008. Methane emissions from rice fields at Tuzu, Sichuan Prov., China. (Online version)
Journal Article Khalil, M. Aslam K.; Shearer, M. J.; Changlin, Duan; Lixin, Ren. 2008. Production, oxidation, and emissions of methane from rice fields in China. Journal of Geophysical Research. Vol: 113. Pages G00A04.
Journal Article Khalil, M. Aslam K.; Butenhoff, Christopher. 2008. Spatial variability of methane emissions from rice fields and implications for experimental design. Journal of Geophysical Research. Vol: 113. Pages G00A09.
Report or White Paper Melillo, Jerry M.; Hassol, S.; Archer, D.; Callaghan, T.; Chapin, F. Stuart; Christensen, T.; McGuire, A. David; Walter, Katey; Zhuang, Qianlai. 2008. Methane from the Arctic: Global warming wildcard. Chapter in United Ntions Environmental Programme Yearbook. Pages 37-48.
Journal Article Tang, Jinyun; Zhuang, Qianlai; Shannon, Robert D.; White, Jeffrey R. 2010. Quantifying wetland methane emissions with process-based models of different complexities. Biogeosciences. Vol: 7. Pages 3817-3837. (Online version)
Data Set Turetsky, Merritt R. 2008. Methane fluxes from an Alaskan rich fen (APEX). (Online version)
Journal Article Turetsky, Merritt R.; Treat, C. C.; Waldrop, Mark P.; Waddington, J. M.; Harden, Jennifer W.; McGuire, A. David. 2008. Short-term response of methane fluxes and methanogen activity to water table and soil warming manipulations in an Alaskan peatland. Journal of Geophysical Research. Vol: 113 . Pages G00A10.
Journal Article Walter, Katey; Chanton, J. P.; Chapin, F. Stuart; Schuur, Edward A.G.; Zimov, Sergei. 2008. Methane production and bubble emissions from arctic lakes: Isotopic implications for source pathways and ages. Journal of Geophysical Research. Vol: 113. Pages G00A08.
Data Set Walter, Katey. 2008. Siberian lake ebullition. (Online version)
Journal Article White, Jeffrey R.; Shannon, Robert D.; Weltzin, Jake F.; Pastor, John; Bridgham, Scott D. 2008. Effects of soil warming and drying on methane cycling in a northern peatland mesocosm study. Journal of Geophysical Research. Vol: 113. Pages G00A06.
Journal Article Xiong, Xiaozhen; Barnet, Christopher D.; Maddy, Eric; Sweeney, Colm; Liu, Xingpin; Zhou, Lihang; Goldberg, Mitch. 2008. Characterization and validation of methane products from the Atmospheric Infrared Sounder (AIRS). Journal of Geophysical Research. Vol: 113. Pages G00A01.
Journal Article Xiong, Xiaozhen; Barnet, Christopher D.; Zhuang, Qianlai; Machida, Toshinobu; Sweeney, Colm; Patra, Prabir K. 2010. Mid-upper tropospheric methane in the high Northern Hemisphere: Spaceborne observations by AIRS, aircraft measurements, and model simulations. Journal of Geophysical Research. Vol: 115. Pages D19309-D19309. (Online version)
Journal Article Zhuang, Qianlai; Reeburgh, William S. 2008. Introduction to special section on synthesis of recent terrestrial methane emission studies. Journal of Geophysical Research. Vol: 113. Pages G00A02.
Journal Article Zhuang, Qianlai; Melack, John M.; Zimov, Sergei; Walter, Katey; Butenhoff, Christopher; Khalil, M. Aslam K. 2009. Global methane emissions from wetlands, rice paddies, and lakes. EOS, Transactions, American Geophysical Union. Vol: 90(5). Pages 37-44.
Journal Article Zhuang, Qianlai; Chen, Min; Xu, Kai; Tang, Jinyun; Saikawa, Eri; Lu, Yanyu; Melillo, Jerry M.; Prinn, Ronald G.; McGuire, A. David. 2013. Response of global soil consumption of atmospheric methane to changes in atmospheric climate and nitrogen deposition. Global Biogeochemical Cycles. Vol: 27. Pages 650-663.