Fig. 2: Source apportionment for the northern Red Sea region.
From: The Red Sea Deep Water is a potent source of atmospheric ethane and propane
a Profiles derived from positive matrix factorization (PMF) analysis. The blue bars indicate the volume mixing ratio contribution from each source and the brown squares the % contribution of each species to the respective factor (sum of factors = 100%). In b, factor 2 strength (average strength = 1) timelines are illustrated for both legs. In c, factor 2 strength is correlated with the ratio between measurements and models for ethane and propane, and in d with the measured methane. Further explanation on the source assignment for each factor is shown in Supplementary Figs. S8–S10.
