Fig. 4
From: Photo-tautomerization of acetaldehyde as a photochemical source of formic acid in the troposphere
Master Chemical Mechanism simulations. Master Chemical Mechanism box model simulations of formic acid production with (blue) and without (black) photo-tautomerization and OH + vinyl alcohol reactions. Two distinct atmospheric conditions are shown: a pristine, ocean environment at Cape Verde, Sao Vincente Island, and b urban environment at London, UK
