Fig. 5: NO₂ and SO₂ imaging results from the plume of marine vessels.

a-1 – a-3 NO₂ plume imaging from large ocean cargo ships. b-1 – b3 SO₂ plume imaging from large ocean cargo ships. a-4 – a-6 NO₂ plume imaging from offshore small cargo ships. b-4 ~ b6 SO₂ plume imaging from offshore small cargo ships