Figure 3. Vertical cross section through the interpolated CO2 gas plumes from flights (a) B989 (20 October 2016); (b) B987 (18 October 2016), and C060 (4 October 2017), which intersected two gas plumes in 2 locations; (c) to the northwest of Katla; and from (d) to the southeast of Katla. The black dots show the measurement locations on the flight tracks. The x axis represents the horizontal distance from the center of the plume (the location with the highest measured gas concentration). The flight paths close to ground level (<1,500 m above sea level) were influenced by the highly irregular mountainous topography.
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