The ATom flight tracks (magenta), the tropopause (blue), and the boundary layer height (green) are superimposed. Temperature anomalies (blue-to-red scale) from a 1980–2015 MERRA-2 climatology, along with zonal mean winds (gray) during ATom-1 (August 2016 average) at (top) 165°W (Pacific sector) and (bottom) 25°W (Atlantic sector). The ATom flight tracks (yellow), the ITCZ (purple), and the jet axes (green) are superimposed on both panels. (bottom) Monthly average August 2016 CERES cloud-cover fraction (shading) and MERRA-2 streamlines (black) at surface level. (top) Temperature deviations (blue-to-red scale) from mean conditions over the 1980–2015 time period according to the MERRA-2 climatology, along with streamlines (black) during ATom-1 (August 2016 average) at 300 hPa. (bottom) Flight track of ATom-3 shown as an example of the tomographic vertical profiling pattern implemented on the ATom deployments. Data are binned by 10° latitude on the y axis and 1-km altitude on the x axis and colored by the number of 1-Hz data points in each bin. (top right) Density matrix aggregating the entire 1-Hz dataset for ATom-1–4 illustrating the data coverage achieved for the campaign. Also noted are the Total Carbon Column Observing Network (TCCON) sites over which ATom performed vertical profiles for measurement intercomparisons. (top left) Map of the flight tracks and stops for the four ATom deployments. Schematic illustration of the NASA ATom mission, highlighting the major emissions sources and atmospheric processes sampled during the deployments.
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