Articles | Volume 15, issue 5
https://doi.org/10.5194/acp-15-2595-2015
© Author(s) 2015. This work is distributed under
the Creative Commons Attribution 3.0 License.
the Creative Commons Attribution 3.0 License.
https://doi.org/10.5194/acp-15-2595-2015
© Author(s) 2015. This work is distributed under
the Creative Commons Attribution 3.0 License.
the Creative Commons Attribution 3.0 License.
Research article
| 
09 Mar 2015
Research article |
| 09 Mar 2015
Variations in global methane sources and sinks during 1910–2010
A. Ghosh
CORRESPONDING AUTHOR
National Institute for Polar Research, Tokyo, Japan
Department of Environmental Geochemical Cycle Research, JAMSTEC, Yokohama, Japan
Department of Environmental Geochemical Cycle Research, JAMSTEC, Yokohama, Japan
Center for Atmospheric and Oceanic Studies, Tohoku University, Sendai, Japan
K. Ishijima
Department of Environmental Geochemical Cycle Research, JAMSTEC, Yokohama, Japan
T. Umezawa
Center for Atmospheric and Oceanic Studies, Tohoku University, Sendai, Japan
Max-Planck Institute for Chemistry, Mainz, Germany
Department of Environmental Geochemical Cycle Research, JAMSTEC, Yokohama, Japan
National Institute for Environmental Studies, Tsukuba, Japan
D. M. Etheridge
CSIRO Oceans and Atmosphere Flagship, Aspendale, Victoria, Australia
S. Sugawara
Miyagi University of Education, Sendai, Japan
K. Kawamura
National Institute for Polar Research, Tokyo, Japan
Department of Biogeochemistry, JAMSTEC, Yokosuka, Japan
J. B. Miller
NOAA Earth System Research Laboratory, Boulder, Colorado, USA
CIRES, University of Colorado, Boulder, Colorado, USA
E. J. Dlugokencky
NOAA Earth System Research Laboratory, Boulder, Colorado, USA
P. B. Krummel
CSIRO Oceans and Atmosphere Flagship, Aspendale, Victoria, Australia
P. J. Fraser
CSIRO Oceans and Atmosphere Flagship, Aspendale, Victoria, Australia
L. P. Steele
CSIRO Oceans and Atmosphere Flagship, Aspendale, Victoria, Australia
R. L. Langenfelds
CSIRO Oceans and Atmosphere Flagship, Aspendale, Victoria, Australia
C. M. Trudinger
CSIRO Oceans and Atmosphere Flagship, Aspendale, Victoria, Australia
J. W. C. White
INSTAAR, University of Colorado, Boulder, Colorado, USA
B. Vaughn
INSTAAR, University of Colorado, Boulder, Colorado, USA
Department of Environmental Geochemical Cycle Research, JAMSTEC, Yokohama, Japan
S. Aoki
Center for Atmospheric and Oceanic Studies, Tohoku University, Sendai, Japan
T. Nakazawa
Center for Atmospheric and Oceanic Studies, Tohoku University, Sendai, Japan
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Latest update: 08 Nov 2025
Short summary
Atmospheric CH4 increased from 900ppb to 1800ppb during the period 1900–2010 at a rate unprecedented in any observational records. We use bottom-up emissions and a chemistry-transport model to simulate CH4. The optimized global total CH4 emission, estimated from the model–observation differences, increased at fastest rate during 1940–1990. Using δ13C of CH4 measurements we attribute this emission increase to biomass burning. Total CH4 lifetime is shortened by 4% over the simulation period.
Atmospheric CH4 increased from 900ppb to 1800ppb during the period 1900–2010 at a rate...
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