Fig. 13From: Investigating regional source and sink patterns of Alpine CO2 and CH4 concentrations based on a back trajectory receptor modelMean percentual contact of the centroid tracks out of the FLEXPART particle dispersion modelling from the receptor sites Jungfraujoch (JFJ), Plateau Rosa (PRO), Sonnblick (SOB) and Schneefernerhaus (UFS) with the near-surface planetary boundary layer during the study period 2011–2015 (in %)Back to article page