Extended Data Fig. 2: Comparison of simulated landfall pipeline pressures for NS1A, NS1B and NS2A obtained using CATHARE with reported pressure data.
From: Methane emissions from the Nord Stream subsea pipeline leaks
Shaded regions represent the upper and lower uncertainty bounds for landfall pressure. On 26 September 2022, ref. 90 reported a pressure drop in the NS2A pipeline overnight with pressure falling to 7 bar at landfall in Lubmin, Germany. Thus, a stabilized pressure was likely obtained before daybreak around 07:00 UTC (brown circle). On 01 October 2022 at 13:38 UTC, the DEA were informed by pipeline operators that pressure stabilization in the NS2A pipeline had occurred at Russian landfall (green circle) (Danish Energy Agency, personal communication). On 02 October 2022 at 10:42 UTC, the DEA were informed by pipeline operators that pressure stabilization in the NS1 pipelines had occurred at Russian landfall (yellow circle) (Danish Energy Agency, personal communication). These reported timelines are broadly consistent with our landfall pressure time series computed using CATHARE.
