Time series of CH₄ and CO concentrations for 2010 and 2011.

<p>(a) Variability in XCH₄ concentrations (ppb) in the southern Amazon region (dark green circles), central South America region (light green circles), and background region (ocean area between 0°–20°S and 20°–50°W; red line). Daily data of the background region were constructed from discrete XCH₄ data using a Humming window with a window-width of 80 days. The standard errors (one sigma) of XCH₄ data are given by the gray boundary. The discontinuity at the background region for May 22–June 20 in 2011 reflects a lack of XCH₄ data. (b) Monthly variability in XCH₄ values (ppb) with the background subtracted (ΔXCH₄) in the southern Amazon region (dark green box-and-whiskers) and the central South America region (light green box-and-whiskers). Upper and lower values of the boxes are monthly quartiles of ΔXCH₄, bars through the boxes are medians, and whiskers represent the range of the 10^th and 90^th percentiles (data are not shown for months in which the number of data points was <25). (c) Same as (b), but showing surface CO concentrations (ppb) from the MOPITT L3 product.</p

Total annual CH₄ flux (upper) and relative contributions of anthropogenic (magenta), natural (blue), and biomass-burning (red) fluxes (lower) in the southern Amazon region (left) and central South America region (right) for 2010 and 2011 (in Tg CH₄ region⁻¹ yr⁻¹).

<p>Error bars represent flux uncertainties.</p