Atmospheric constraints on the methane emissions from the East Siberian Shelf

Berchet, A.; Bousquet, P.; Pison, I.; Locatelli, R.; Chevallier, F.; Paris, J.-D.; Dlugokencky, E. J.; Laurila, T.; Hatakka, J.; Viisanen, Y.; Worthy, D. E. J.; Nisbet, E. G.; Fisher, R. E.; France, J. L.; Lowry, D.; Ivakhov, V.
October 2015
Atmospheric Chemistry & Physics;2015, Vol. 15 Issue 19, p25477
Academic Journal
Sub-sea permafrost and hydrates in the East Siberian Arctic Ocean Continental Shelf (ESAS) constitute a substantial carbon pool, and a potentially large source of methane to the atmosphere. Previous studies based on interpolated oceanographic campaigns estimated atmospheric emissions from this area at 8-17 Tg CH4 y-1. Here, we propose insights based on atmospheric observations to evaluate these estimates. Isotopic observations suggest a biogenic origin (either terrestrial or marine) of the methane in air masses originating from ESAS during summer 2010. The comparison of high-resolution simulations of atmospheric methane mole fractions to continuous methane observations during the entire year 2012 confirms the high variability and heterogeneity of the methane releases from ESAS. Simulated mole fractions including a 8 Tg CH4 y-1 source from ESAS are found largely overestimated compared to the observations in winter, whereas summer signals are more consistent with each other. Based on a comprehensive statistical analysis of the observations and of the simulations, annual methane emissions from ESAS are estimated in a range of 0.5-4.3 Tg CH4 y-1.


Related Articles

  • Investigating Alaskan methane and carbon dioxide fluxes using measurements from the CARVE tower. Karion, A.; Sweeney, C.; Miller, J. B.; Andrews, A. E.; Commane, R.; Dinardo, S.; Henderson, J. M.; Lindaas, J.; Lin, J. C.; Luus, K. A.; Newberger, T.; Tans, P.; Wofsy, S. C.; Wolter, S.; Miller, C. E. // Atmospheric Chemistry & Physics Discussions;2015, Vol. 15 Issue 23, p34871 

    Northern high-latitude carbon sources and sinks, including those resulting from degrading permafrost, are thought to be sensitive to the rapidly warming climate. Because the near-surface atmosphere integrates surface fluxes over large (~500-1000 km) scales, atmospheric monitoring of carbon...

  • Enrichment in 13C of atmospheric CH4 during the Younger Dryas termination. Melton, J. R.; Schaefer, H.; Whiticar, M. J. // Climate of the Past Discussions;2011, Vol. 7 Issue 5, p3287 

    The abrupt warming across the Younger Dryas termination (~11 600 yr before present) was marked by a large increase in the global atmospheric methane mixing ratio. The debate over sources responsible for the rise in methane centers on the roles of global wetlands, marine gas hydrates, and...

  • Gas Trap. Anderson, Robert // Natural History;May2006, Vol. 115 Issue 4, p62 

    The article presents information on the advantages and disadvantages of methane. Methane is a simple molecule with four hydrogen atoms bonded to a central carbon. It is a clear and odorless gas. It cooks people's comfort food and is a vital source of energy. However, methane also has a negative...

  • A Little-Realized Welcome Function of Permafrost-Affected Soils.  // CO2 Science;11/11/2015, Vol. 18, p2 

    A review of the article "An active atmospheric methane sink in high Arctic mineral cryosols" by M.C. Y. Lau, B.T. Stackhouse, and A. Chauhan, which appeared in the 2015 issue of the periodical "The International Society for Microbial Ecology Journal" is presented.

  • The Big Melt. Dickey, Christopher // Newsweek Global;7/31/2013, Vol. 161 Issue 28, p1 

    The article discusses the melting of the Earth's permafrost and the possible impact of increased levels of methane gas, which may cause severe storms and global warming. The views of Peter Wadham, Professor of Ocean Physics at Cambridge University in Cambridge, England, are presented.

  • Vast methane belch possible at any time. Pearce, Fred // New Scientist;7/27/2013, Vol. 219 Issue 2927, p16 

    The article discusses a report published in "Nature" by researchers Chris Hope, Peter Wadhams, and Gail Whiteman that projected a 60 trillion dollar economic impact of the predicted release of massive amounts of methane greenhouse gas due to ice melting of the East Siberian Arctic Shelf. The...

  • Global warming bubbles up from the ocean. Ravilious, Kate // New Scientist;3/4/2006, Vol. 189 Issue 2541, p11 

    This article focuses on a new study which reveals that deep-sea volcanoes are an important source of atmospheric methane and also contributes to global warming. Eberhard Sauter of the Alfred Wegener Institute for Polar and Marine Research in Bremerhaven, Germany, and his colleagues found a huge...

  • Reply to L. Kutzbach. KHVOROSTYANOV, D. V.; KRINNER, G.; CIAIS, P.; HEIMANN, M.; ZIMOV, S. A. // Tellus: Series B;Jul2009, Vol. 61 Issue 3, p579 

    A response by D. V. Khvorostyanov et al to a letter to the editor about their article "Vulnerability of Permafrost Carbon to Global Warming. Part I: Model Description and Role of Heat Generated by Organic Matter Decomposition" is presented.

  • A comment on �Vulnerability of permafrost carbon to global warming. Part I: model description and role of heat generated by organic matter decomposition� by D. V. Khvorostyanov et al. (2008). KUTZBACH, L. // Tellus: Series B;Jul2009, Vol. 61 Issue 3, p577 

    A letter to the editor is presented in response to the article "Vulnerability of Permafrost Carbon to Global Warming. Part I: Model Description and Role of Heat Generated by Organic Matter Decomposition" by D. V. Khvorostyanov et al.


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics