Articles | Volume 20, issue 21
https://doi.org/10.5194/acp-20-13011-2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/acp-20-13011-2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
06 Nov 2020
Research article |
| 06 Nov 2020
| 06 Nov 2020
On the role of trend and variability in the hydroxyl radical (OH) in the global methane budget
Yuanhong Zhao
CORRESPONDING AUTHOR
Laboratoire des Sciences du Climat et de l'Environnement, LSCE-IPSL
(CEA-CNRS-UVSQ), Université Paris-Saclay, 91191 Gif-sur-Yvette, France
Marielle Saunois
Laboratoire des Sciences du Climat et de l'Environnement, LSCE-IPSL
(CEA-CNRS-UVSQ), Université Paris-Saclay, 91191 Gif-sur-Yvette, France
Philippe Bousquet
Laboratoire des Sciences du Climat et de l'Environnement, LSCE-IPSL
(CEA-CNRS-UVSQ), Université Paris-Saclay, 91191 Gif-sur-Yvette, France
Laboratoire des Sciences du Climat et de l'Environnement, LSCE-IPSL
(CEA-CNRS-UVSQ), Université Paris-Saclay, 91191 Gif-sur-Yvette, France
now at: Climate and Space Sciences and Engineering, University
of Michigan, Ann Arbor, MI, USA
Antoine Berchet
Laboratoire des Sciences du Climat et de l'Environnement, LSCE-IPSL
(CEA-CNRS-UVSQ), Université Paris-Saclay, 91191 Gif-sur-Yvette, France
Michaela I. Hegglin
Department of Meteorology, University of Reading, Earley Gate,
Reading, RG6 6BB, United Kingdom
Josep G. Canadell
Global Carbon Project, CSIRO Oceans and Atmosphere, Canberra,
Australian Capital Territory 2601, Australia
Robert B. Jackson
Department of Earth System Science, Woods Institute for the Environment, and Precourt Institute for Energy, Stanford University, Stanford, CA, USA
Makoto Deushi
Meteorological Research Institute, 1-1 Nagamine, Tsukuba, Ibaraki,
305-0052, Japan
Patrick Jöckel
Deutsches Zentrum für Luft- und Raumfahrt (DLR), Institut für Physik der Atmosphäre, Oberpfaffenhofen, Germany
Douglas Kinnison
Atmospheric Chemistry Observations and Modeling Laboratory, National Center for Atmospheric Research, 3090 Center Green Drive, Boulder, CO, USA
Ole Kirner
Steinbuch Centre for Computing, Karlsruhe Institute of Technology,
Karlsruhe, Germany
Sarah Strode
NASA Goddard Space Flight Center, Greenbelt, MD, USA
GESTAR, Universities Space Research Association (USRA), Columbia,
MD, USA
Simone Tilmes
Atmospheric Chemistry Observations and Modeling Laboratory, National Center for Atmospheric Research, 3090 Center Green Drive, Boulder, CO, USA
Edward J. Dlugokencky
Global Monitoring Division, NOAA Earth System Research Laboratory,
Boulder, CO, USA
Laboratoire des Sciences du Climat et de l'Environnement, LSCE-IPSL
(CEA-CNRS-UVSQ), Université Paris-Saclay, 91191 Gif-sur-Yvette, France
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Short summary
Decadal trends and variations in OH are critical for understanding atmospheric CH4 evolution. We quantify the impacts of OH trends and variations on the CH4 budget by conducting CH4 inversions on a decadal scale with an ensemble of OH fields. We find the negative OH anomalies due to enhanced fires can reduce the optimized CH4 emissions by up to 10 Tg yr−1 during El Niño years and the positive OH trend from 1986 to 2010 results in a ∼ 23 Tg yr−1 additional increase in optimized CH4 emissions.
Decadal trends and variations in OH are critical for understanding atmospheric CH4 evolution. We...
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