Figure : tracking-methane-emissions-arctic-tundra

Tracking Methane Emissions from Arctic Tundra

Figure 3.4


This figure appears in chapter 3 of the Our Changing Planet: The U.S. Global Change Research Program for Fiscal Year 2017 report.

http://www.pnas.org/content/113/1/40.full

Ten-day average of methane (CH4) flux measured by five eddy covariance (EC) towers over a 300-kilometer transect across the North Slope of Alaska (shaded bands) for 2013 (red) and 2014 (brown), with the mean (solid line), 95% confidence intervals (darker shade), and standard deviation in the CH4 data (lightest shade). The regional fluxes of CH4 calculated from Carbon in Arctic Reservoirs Vulnerability Experiment (Appendix I) aircraft data for the North Slope of Alaska are shown for 2012 (yellow circles), 2013 (red squares), and 2014 (brown diamonds). The mean dates for the onset of winter, the growing season, and the zero curtain are indicated in the band on top. Regional scale methane fluxes showed similar seasonal patterns to the five EC flux towers across multiple years. Source: Zona et al. 2016.

When citing this figure, please reference Zona, D., B. Gioli, R. Commane, J. Lindaas, S.C. Wofsy, C.E. Miller, S.J. Dinardo, S. Dengel, C. Sweeney, A. Karion, R.Y.-W. Chang, J.M. Henderson, P.C. Murphy, J.P. Goodrich, V. Moreaux, A. Liljedahl, J.D. Watts, J.S. Kimball, D.A. Lipson, W.C. Oechel. 2015. Cold season emissions dominate the Arctic tundra methane budget. Proceedings of the National Academy of Sciences. http://www.pnas.org/content/113/1/40.full .

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