Tracking of the methane plume emitted by leakages from Nord Stream pipelines in the Baltic Sea

This article first reports detections of explosions which occurred on Nord Stream pipelines near Denmark and Sweden, and observations and measurements made, and raises questions about the quantity and methane content of leakages. Then, the authors present the ICOS observation network which aims at tracking the evolution of the main greenhouse gases in the atmosphere, over the ocean and in ecosystems. They report how ICOS has processed information related to these leakages in the Baltic Sea, evokes the development of simulations based on these measurements in order to try to predict evolutions of emissions. They briefly discuss the assessment of methane emission