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Large tundra methane burst during onset of freezing

Abstract

Terrestrial wetland emissions are the largest single source of the greenhouse gas methane1. Northern high-latitude wetlands contribute significantly to the overall methane emissions from wetlands, but the relative source distribution between tropical and high-latitude wetlands remains uncertain2,3. As a result, not all the observed spatial and seasonal patterns of atmospheric methane concentrations can be satisfactorily explained, particularly for high northern latitudes. For example, a late-autumn shoulder is consistently observed in the seasonal cycles of atmospheric methane at high-latitude sites4, but the sources responsible for these increased methane concentrations remain uncertain. Here we report a data set that extends hourly methane flux measurements from a high Arctic setting into the late autumn and early winter, during the onset of soil freezing. We find that emissions fall to a low steady level after the growing season but then increase significantly during the freeze-in period. The integral of emissions during the freeze-in period is approximately equal to the amount of methane emitted during the entire summer season. Three-dimensional atmospheric chemistry and transport model simulations of global atmospheric methane concentrations indicate that the observed early winter emission burst improves the agreement between the simulated seasonal cycle and atmospheric data from latitudes north of 60° N. Our findings suggest that permafrost-associated freeze-in bursts of methane emissions from tundra regions could be an important and so far unrecognized component of the seasonal distribution of methane emissions from high latitudes.

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Figure 1: Full-season methane emission and soil temperature.
Figure 2: Comparison of measured and model-simulated latitudinally averaged seasonal cycles of methane.

References

  1. Mikaloff Fletcher, S. E., Tans, P. P., Bruhwiler, L. M., Miller, J. B. & Heimann, M. CH4 sources estimated from atmospheric observations of CH4 and its 13C/12C isotopic ratios: 1. Inverse modeling of source processes. Glob. Biogeochem. Cycles 18, GB4004 (2004)

    ADS  Google Scholar 

  2. Dlugokencky, E. J. et al. Atmospheric methane levels off: Temporary pause or a new steady-state? Geophys. Res. Lett. 30, 1992 (2003)

    ADS  Article  Google Scholar 

  3. Miller, J. B. et al. Airborne measurements indicate large methane emissions from the eastern Amazon basin. Geophys. Res. Lett. 34, L10809 (2007)

    ADS  Article  Google Scholar 

  4. Dlugokencky, E. J., Steele, L. P., Lang, P. M. & Masarie, K. A. The growth rate and distribution of atmospheric methane. J. Geophys. Res. 99, 17021–17043 (1994)

    ADS  CAS  Article  Google Scholar 

  5. Reeburgh, W. S. et al. A CH4 emission estimate for the Kuparuk River basin, Alaska. J. Geophys. Res. 103, 29005–29013 (1998)

    ADS  CAS  Article  Google Scholar 

  6. Christensen, T. R. et al. Trace gas exchange in a high-arctic valley 1. Variations in CO2 and CH4 flux between tundra vegetation types. Glob. Biogeochem. Cycles 14, 701–713 (2000)

    ADS  CAS  Article  Google Scholar 

  7. Friborg, T., Christensen, T. R., Hansen, B. U., Nordstroem, C. & Soegaard, H. Trace gas exchange in a high-arctic valley 2. Landscape CH4 fluxes measured and modeled using eddy correlation data. Glob. Biogeochem. Cycles 14, 715–723 (2000)

    ADS  Article  Google Scholar 

  8. Gedney, N., Cox, P. M. & Huntingford, C. Climate feedback from wetland methane emissions. Geophys. Res. Lett. 31, L20503 (2004)

    ADS  Article  Google Scholar 

  9. Bousquet, P. et al. Contribution of anthropogenic and natural sources to atmospheric methane variability. Nature 443, 439–443 (2006)

    ADS  CAS  Article  Google Scholar 

  10. Christensen, T. R. Methane emission from Arctic tundra. Biogeochemistry 21, 117–139 (1993)

    CAS  Article  Google Scholar 

  11. Fan, S. M. et al. Micrometeorological measurements of CH4 and CO2 exchange between the atmosphere and subarctic tundra. J. Geophys. Res. 97, 16627–16644 (1992)

    ADS  CAS  Article  Google Scholar 

  12. Corradi, C., Kolle, O., Walter, K., Zimov, S. A. & Schulze, E.-D. Carbon dioxide and methane exchange of a north-east Siberian tussock tundra. Glob. Change Biol. 11, 1910–1925 (2005)

    Google Scholar 

  13. Whalen, S. C. & Reeburgh, W. S. A methane flux time series for tundra environments. Glob. Biogeochem. Cycles 2, 399–409 (1988)

    ADS  CAS  Article  Google Scholar 

  14. Walter, K. M., Zimov, S. A., Chanton, J. P., Verbyla, D. & Chapin, F. S. Methane bubbling from Siberian thaw lakes as a positive feedback to climate warming. Nature 443, 71–75 (2006)

    ADS  CAS  Article  Google Scholar 

  15. Hargreaves, K. J., Fowler, D., Pitcairn, C. E. R. & Aurela, M. Annual methane emission from Finnish mires estimated from eddy covariance campaign measurements. Theor. Appl. Climatol. 70, 203–213 (2001)

    ADS  Article  Google Scholar 

  16. Tokida, T. et al. Episodic release of methane bubbles from peatland during spring thaw. Chemosphere 70, 165–171 (2007)

    ADS  CAS  Article  Google Scholar 

  17. Bliss, L. C. & Matveyeva, N. V. in Arctic Ecosystems in a Changing Climate: An Ecophysiological Perspective (eds Chapin, F. S. III, Jefferies, R. L., Reynolds, J. F., Shaver, G. R. & Svoboda, J.) 59–89 (Academic, 1992)

    Book  Google Scholar 

  18. Meltofte, H., Christensen, T. R., Elberling, B., Forchhammer, M. C. & Rasch, M. (eds) High-Arctic Ecosystem Dynamics in a Changing Climate. Advances in Ecological Research Vol. 40 (Elsevier, 2008)

    Google Scholar 

  19. Christiansen, H. H. et al. Holocene environmental reconstruction from deltaic deposits in northeast Greenland. J. Quat. Sci. 17, 145–160 (2002)

    Article  Google Scholar 

  20. Krol, M. C. et al. The two-way nested global chemistry-transport zoom model TM5: algorithm and applications. Atmos. Chem. Phys. 5, 417–432 (2005)

    ADS  CAS  Article  Google Scholar 

  21. Bergamaschi, P. et al. Satellite chartography of atmospheric methane from SCIAMACHY on board ENVISAT. 2. Evaluation based on inverse model simulations. J. Geophys. Res. 112, D02304 (2007)

    ADS  Article  Google Scholar 

  22. Walter, B. P., Heimann, M. & Matthews, E. Modeling modern methane emissions from natural wetlands. 2. Interannual variations 1982-1993. J. Geophys. Res. 106, 34207–34217 (2001)

    ADS  CAS  Article  Google Scholar 

  23. Brown, J., Ferrians, O. J., Heginbottom, J. A. & Melnikov, E. S. Circum-arctic Map of Permafrost and Ground-Ice Conditions. USGS Circum-Pacific Map Series CP-45 (scale 1:10,000 000) (US Geological Survey, 1997)

    Google Scholar 

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Acknowledgements

This work was carried out under the auspices of the GeoBasis programme and part of the Zackenberg Ecological Research Operations funded by the Danish Ministry of the Environment and the ISICaB project funded by the Commission for Scientific Research in Greenland (KVUG). ASIAQ–Greenland Survey provided climate data. The work was also supported by the Swedish Research Councils VR and FORMAS. We thank P. Bergamachi (JRC) and J.-F. Meirink (KNMI) for providing the TM5 model setup. T. Tagesson helped with the field work in Zackenberg. We are grateful for comments on earlier versions of this manuscript from A. Lindroth and B. Christensen.

Author Contributions T.R.C., M.P.T., M.M., C.S. and L.S. designed the field research; M.M. designed, constructed and set up the automatic measurement system in Zackenberg; C.S. operated the system and performed manual measurements; M.M. performed data analysis; E.D. and S.H. provided atmospheric CH4 data and designed and ran the atmospheric transport model experiments; T.R.C., M.M., S.H. and E.D. drafted the manuscript.

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Correspondence to Torben R. Christensen.

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This file contains Supplementary Figures and Legends 1-3, Supplementary Tables 1-2, Supplementary Notes and Supplementary Discussion. (PDF 1084 kb)

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Mastepanov, M., Sigsgaard, C., Dlugokencky, E. et al. Large tundra methane burst during onset of freezing. Nature 456, 628–630 (2008). https://doi.org/10.1038/nature07464

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