Flaring efficiencies and NOx emission ratios measured for offshore oil and gas facilities in the North Sea. - Shaw, Jacob T.; Foulds, Amy; Wilde, Shona; Barker, Patrick; Squires, Freya; Lee, James; Purvis, Ruth; Burton, Ralph; Colfescu, Ioana; Mobbs, Stephen; Bauguitte, Stéphane J.-B.; Young, Stuart; et al. (Atmospheric Chemistry & Physics Discussions, 2022)