Results 11 to 20 of about 357,256 (297)

Large emissions from floodplain trees close the Amazon methane budget [PDF]

, 2017
Wetlands are the largest global source of atmospheric methane (CH4), a potent greenhouse gas. However, methane emission inventories from the Amazon floodplain, the largest natural geographic source of CH4 in the tropics, consistently underestimate the ...
A Siegenthaler, AA Bloom, AA Bloom, AH Devol, AJ Webb, Alex Enrich-Prast, B Ringeval, C Frankenberg, C Frankenberg, C Wilson, Cassia Mônica Sakuragui, D Bastviken, David Bastviken, Edward R. C. Hornibrook, EM Latrubesse, Emanuel Gloor, F Keppler, GO Martinson, H Rusch, H Schaefer, HO Sawakuchi, Humberto Marotta, JB Miller, JM Melack, John Bharat Miller, KB Bartlett, L Belger, LL Hess, LL Hess, LS Santiago, Luana S. Basso, Luana Silva Braucks Calazans, Luciana V. Gatti, Olaf Malm, R Fisher, Roberta Bittencourt Peixoto, RR Draxler, S Kirschke, S Pitz, SR Pangala, SR Pangala, SR Pangala, Sunitha R. Pangala, Veronika Beck, Vincent Gauci, Wanderley Rodrigues Bastos, ZP Wang   +46 more
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Quantifying sources of methane using light alkanes in the Los Angeles basin, California [PDF]

, 2013
Methane (CH4), carbon dioxide (CO2), carbon monoxide (CO), and C2-C5 alkanes were measured throughout the Los Angeles (L.A.) basin in May and June 2010. We use these data to show that the emission ratios of CH4/CO and CH4/CO2 in the L.A. basin are larger
Aikin, KC, Andrews, AE, Atlas, E, Blake, D, Brioude, J, Daube, BC, De Gouw, JA, Dlugokencky, E, Frost, GJ, Gentner, DR, Gilman, JB, Goldstein, AH, Harley, RA, Holloway, JS, Kofler, J, Kuster, WC, Lang, PM, Novelli, PC, Parrish, DD, Peischl, J, Ryerson, TB, Santoni, GW, Trainer, M, Wofsy, SC   +23 more
core   +2 more sources

Implications of the recent fluctuations in the growth rate of tropospheric methane [PDF]

, 2002
Global measurements show that the mixing ratio of tropospheric methane (CH4) increased by 1.1% (19.5 ± 1.7 ppbv) over the five-year period 1996-2000, with striking fluctuations in its annual growth rate.
Blake, DR, Chen, TY, Rowland, FS, Simpson, IJ   +3 more
core   +2 more sources

Effect of permafrost thaw on CO2 and CH4 exchange in a western Alaska peatland chronosequence [PDF]

, 2014
Permafrost soils store over half of global soil carbon (C), and northern frozen peatlands store about 10% of global permafrost C. With thaw, inundation of high latitude lowland peatlands typically increases the surface-atmosphere flux of methane (CH4), a
Ewing, Stephanie A., Fuller, Christopher C., Harden, Jennifer W., Johnston, Carmel E., Jorgenson, M. Torre, Koch, Joshua C., Manies, Kristen, Varner, Ruth K., Wickland, Kimberly P.   +8 more
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Autothermal Reforming of Methane with Integrated CO2 Capture in a Novel Fluidized Bed Membrane Reactor. Part 2 Comparison of Reactor Configurations [PDF]

, 2008
The reactor performance of two novel fluidized bed membrane reactor configurations for hydrogen production with integrated CO2 capture by autothermal reforming of methane (experimentally investigated in Part 1) have been compared using a phenomenological
Gallucci, F., Kuipers, J.A.M., Sint Annaland, M. van   +2 more
core   +11 more sources

Effect of Carex rostrata on seasonal and interannual variability in peatland methane emissions [PDF]

, 2014
Peatlands are a large natural source of atmospheric methane (CH4), and the sedge Carex rostrata plays a critical role in the production, oxidation, and transport of CH4 in these systems.
Bubier, Jill L., Frolking, Steve, Noyce, Genevieve L, Varner, Ruth   +3 more
core   +2 more sources

Mass fluxes and isofluxes of methane (CH4) at a New Hampshire fen measured by a continuous wave quantum cascade laser spectrometer [PDF]

, 2012
We have developed a mid‐infrared continuous‐wave quantum cascade laser direct‐absorption spectrometer (QCLS) capable of high frequency (≥1 Hz) measurements of 12CH4 and 13CH4 isotopologues of methane (CH4) with in situ 1‐s RMS image precision of 1.5 ...
Crill, Patrick M., Goodrich, Jordan P., Lee, Ben H., McManus, J. Barry, Nelson, David D., Santoni, Gregory W., Varner, Ruth K., Wofsy, Steven C., Zahniser, Mark S.   +8 more
core   +3 more sources

Methane in Lakes: Variability in Stable Carbon Isotopic Composition and the Potential Importance of Groundwater Input

Frontiers in Earth Science, 2021
Methane (CH4) is an important component of the carbon (C) cycling in lakes. CH4 production enables carbon in sediments to be either reintroduced to the food web via CH4 oxidation or emitted as a greenhouse gas making lakes one of the largest natural ...
Jonathan Schenk, Henrique O. Sawakuchi, Anna K. Sieczko, Gustav Pajala, David Rudberg, Emelie Hagberg, Kjell Fors, Hjalmar Laudon, Jan Karlsson, David Bastviken   +9 more
doaj   +1 more source

Development of a low-maintenance measurement approach to continuously estimate methane emissions: a case study [PDF]

, 2016
The chemical breakdown of organic matter in landfills represents a significant source of methane gas (CH4). Current estimates suggest that landfills are responsible for between 3% and 19% of global anthropogenic emissions. The net CH4 emissions resulting
Allen, Grant, Connors, Sarah, Davies, S., Hancock, B. R., Harris, Neil R. P., Pitt, Joseph, Riddick, Stuart N., Robinson, Andrew D.   +7 more
core   +1 more source

Timescale dependence of environmental and plant‐mediated controls on CH4 flux in a temperate fen [PDF]

, 2007
This study examined daily, seasonal, and interannual variations in CH4 emissions at a temperate peatland over a 5‐year period. We measured net ecosystem CO2 exchange (NEE), CH4 flux, water table depth, peat temperature, and meteorological parameters ...
Bubier, Jill L., Crill, Patrick M., Treat, Claire C., Varner, Ruth K.   +3 more
core   +2 more sources