skip to main content

DOE PAGESDOE PAGES

Title: The recent increase of atmospheric methane from 10 years of ground-based NDACC FTIR observations since 2005

Changes of atmospheric methane total columns (CH 4) since 2005 have been evaluated using Fourier transform infrared (FTIR) solar observations carried out at 10 ground-based sites, affiliated to the Network for Detection of Atmospheric Composition Change (NDACC). From this, we find an increase of atmospheric methane total columns of 0.31 ± 0.03 % year –1 (2 σ level of uncertainty) for the 2005–2014 period. Comparisons with in situ methane measurements at both local and global scales show good agreement. We used the GEOS-Chem chemical transport model tagged simulation, which accounts for the contribution of each emission source and one sink in the total methane, simulated over 2005–2012. After regridding according to NDACC vertical layering using a conservative regridding scheme and smoothing by convolving with respective FTIR seasonal averaging kernels, the GEOS-Chem simulation shows an increase of atmospheric methane total columns of 0.35 ± 0.03 % year –1 between 2005 and 2012, which is in agreement with NDACC measurements over the same time period (0.30 ± 0.04 % year –1, averaged over 10 stations). Analysis of the GEOS-Chem-tagged simulation allows us to quantify the contribution of each tracer to the global methane change since 2005. We find that natural sources suchmore » as wetlands and biomass burning contribute to the interannual variability of methane. However, anthropogenic emissions, such as coal mining, and gas and oil transport and exploration, which are mainly emitted in the Northern Hemisphere and act as secondary contributors to the global budget of methane, have played a major role in the increase of atmospheric methane observed since 2005. Furthermore based on the GEOS-Chem-tagged simulation, we discuss possible cause(s) for the increase of methane since 2005, which is still unexplained.« less
Authors:
ORCiD logo [1] ;  [2] ;  [3] ;  [3] ;  [4] ;  [5] ;  [6] ;  [7] ;  [8] ;  [9] ;  [10] ;  [11] ;  [6] ;  [12] ;  [11] ; ORCiD logo [13] ;  [14] ; ORCiD logo [15] ; ORCiD logo [15] ;  [16] more »;  [11] ;  [4] ;  [3] ;  [6] ;  [2] ;  [12] ; ORCiD logo [2] « less
  1. Univ. of Liege, Liege (Belgium); Univ. of Toronto, Toronto, ON (Canada)
  2. Univ. of Liege, Liege (Belgium)
  3. Univ. of Toronto, Toronto, ON (Canada)
  4. National Institute of Water and Atmospheric Research, Lauder (New Zealand)
  5. Harvard Univ., Cambridge, MA (United States)
  6. Karlsruhe Institute of Technology (KIT), Karlsruhe (Germany)
  7. Univ. of Waterloo, Waterloo, ON (Canada)
  8. Federal Office of Meteorology and Climatology, Payerne (Switzerland)
  9. ETH Zurich, Zurich (Switzerland)
  10. Izana Atmospheric Research Centre (IARC), Izana (Spain)
  11. Univ. of Wollongong, Wollongong (Australia)
  12. Karlsruhe Institute of Technology, Garmisch-Partenkirchen (Germany)
  13. CSIRO Oceans & Atmosphere, Aspendale, VIC (Australia)
  14. Tohoku Univ., Sendai (Japan)
  15. National Institute for Environmental Studies (NIES), Ibaraki (Japan)
  16. Univ. of Bristol, Bristol (United Kingdom)
Publication Date:
Grant/Contract Number:
SC0009919; SC0009988
Type:
Accepted Manuscript
Journal Name:
Atmospheric Chemistry and Physics (Online)
Additional Journal Information:
Journal Name: Atmospheric Chemistry and Physics (Online); Journal Volume: 17; Journal Issue: 3; Journal ID: ISSN 1680-7324
Publisher:
European Geosciences Union
Research Org:
Univ. of Toronto, Toronto, ON (Canada); Univ. of Liege, Liege (Belgium)
Sponsoring Org:
USDOE Office of Science (SC), Biological and Environmental Research (BER) (SC-23)
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES; natural-gas production; molecular spectroscopic database; infrared solar; United States; fossil-fuel; interannual variability; isotopic composition; greenhouse gases; free troposphere; satellite data
OSTI Identifier:
1356083
Alternate Identifier(s):
OSTI ID: 1358378

Bader, Whitney, Bovy, Benoît, Conway, Stephanie, Strong, Kimberly, Smale, Dan, Turner, Alexander J., Blumenstock, Thomas, Boone, Chris, Collaud Coen, Martine, Coulon, Ancelin, Garcia, Omaira, Griffith, David W. T., Hase, Frank, Hausmann, Petra, Jones, Nicholas, Krummel, Paul, Murata, Isao, Morino, Isamu, Nakajima, Hideaki, O'Doherty, Simon, Paton-Walsh, Clare, Robinson, John, Sandrin, Rodrigue, Schneider, Matthias, Servais, Christian, Sussmann, Ralf, and Mahieu, Emmanuel. The recent increase of atmospheric methane from 10 years of ground-based NDACC FTIR observations since 2005. United States: N. p., Web. doi:10.5194/acp-17-2255-2017.
Bader, Whitney, Bovy, Benoît, Conway, Stephanie, Strong, Kimberly, Smale, Dan, Turner, Alexander J., Blumenstock, Thomas, Boone, Chris, Collaud Coen, Martine, Coulon, Ancelin, Garcia, Omaira, Griffith, David W. T., Hase, Frank, Hausmann, Petra, Jones, Nicholas, Krummel, Paul, Murata, Isao, Morino, Isamu, Nakajima, Hideaki, O'Doherty, Simon, Paton-Walsh, Clare, Robinson, John, Sandrin, Rodrigue, Schneider, Matthias, Servais, Christian, Sussmann, Ralf, & Mahieu, Emmanuel. The recent increase of atmospheric methane from 10 years of ground-based NDACC FTIR observations since 2005. United States. doi:10.5194/acp-17-2255-2017.
Bader, Whitney, Bovy, Benoît, Conway, Stephanie, Strong, Kimberly, Smale, Dan, Turner, Alexander J., Blumenstock, Thomas, Boone, Chris, Collaud Coen, Martine, Coulon, Ancelin, Garcia, Omaira, Griffith, David W. T., Hase, Frank, Hausmann, Petra, Jones, Nicholas, Krummel, Paul, Murata, Isao, Morino, Isamu, Nakajima, Hideaki, O'Doherty, Simon, Paton-Walsh, Clare, Robinson, John, Sandrin, Rodrigue, Schneider, Matthias, Servais, Christian, Sussmann, Ralf, and Mahieu, Emmanuel. 2017. "The recent increase of atmospheric methane from 10 years of ground-based NDACC FTIR observations since 2005". United States. doi:10.5194/acp-17-2255-2017. https://www.osti.gov/servlets/purl/1356083.
@article{osti_1356083,
title = {The recent increase of atmospheric methane from 10 years of ground-based NDACC FTIR observations since 2005},
author = {Bader, Whitney and Bovy, Benoît and Conway, Stephanie and Strong, Kimberly and Smale, Dan and Turner, Alexander J. and Blumenstock, Thomas and Boone, Chris and Collaud Coen, Martine and Coulon, Ancelin and Garcia, Omaira and Griffith, David W. T. and Hase, Frank and Hausmann, Petra and Jones, Nicholas and Krummel, Paul and Murata, Isao and Morino, Isamu and Nakajima, Hideaki and O'Doherty, Simon and Paton-Walsh, Clare and Robinson, John and Sandrin, Rodrigue and Schneider, Matthias and Servais, Christian and Sussmann, Ralf and Mahieu, Emmanuel},
abstractNote = {Changes of atmospheric methane total columns (CH4) since 2005 have been evaluated using Fourier transform infrared (FTIR) solar observations carried out at 10 ground-based sites, affiliated to the Network for Detection of Atmospheric Composition Change (NDACC). From this, we find an increase of atmospheric methane total columns of 0.31 ± 0.03 % year–1 (2σ level of uncertainty) for the 2005–2014 period. Comparisons with in situ methane measurements at both local and global scales show good agreement. We used the GEOS-Chem chemical transport model tagged simulation, which accounts for the contribution of each emission source and one sink in the total methane, simulated over 2005–2012. After regridding according to NDACC vertical layering using a conservative regridding scheme and smoothing by convolving with respective FTIR seasonal averaging kernels, the GEOS-Chem simulation shows an increase of atmospheric methane total columns of 0.35 ± 0.03 % year–1 between 2005 and 2012, which is in agreement with NDACC measurements over the same time period (0.30 ± 0.04 % year–1, averaged over 10 stations). Analysis of the GEOS-Chem-tagged simulation allows us to quantify the contribution of each tracer to the global methane change since 2005. We find that natural sources such as wetlands and biomass burning contribute to the interannual variability of methane. However, anthropogenic emissions, such as coal mining, and gas and oil transport and exploration, which are mainly emitted in the Northern Hemisphere and act as secondary contributors to the global budget of methane, have played a major role in the increase of atmospheric methane observed since 2005. Furthermore based on the GEOS-Chem-tagged simulation, we discuss possible cause(s) for the increase of methane since 2005, which is still unexplained.},
doi = {10.5194/acp-17-2255-2017},
journal = {Atmospheric Chemistry and Physics (Online)},
number = 3,
volume = 17,
place = {United States},
year = {2017},
month = {2}
}