Fig. 2: Overview of measurement approaches applied in our analysis and the period(s) over which the measurements were taken. | Nature

Fig. 2: Overview of measurement approaches applied in our analysis and the period(s) over which the measurements were taken.

From: Methane emissions from the Nord Stream subsea pipeline leaks

Fig. 2

a, Bottom-up and top-down measurement approaches applied in our analysis of the Nord Stream pipeline leaks. The numbers 1–15 correspond to each measurement approach. b, The period(s) over which the measurements were taken. See text and Supplementary Table 1 for details on each approach. Although shown, the results of a second airborne campaign on 16 and 17 November 2022 using HELiPOD, and a second marine campaign deploying CTD casts between 9 and 12 January 2023 have not been published and are not otherwise available. MetOp-B and Sentinel-2B satellite icons adapted with permission from the European Space Agency (ESA) and ESA/ATG Medialab. GHGSat Satellite icon adapted from GHGSat.

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