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. Author manuscript; available in PMC: 2017 Feb 28.
Published in final edited form as: Nature. 2016 Aug 31;537(7621):532–534. doi: 10.1038/nature19314

Figure 1. Typical particle formation event recorded at Mace Head.

Figure 1

a, The event is initiated slightly after noon at low tide resulting in iodine emissions from marine algae. Particles grow rapidly to 2-10 nm sizes. When the tide gets high again after ~6 hours the particle production stops. b, The event is associated with a slight increase of sulphuric acid, thought typically to be the key player in atmospheric nucleation, but much more predominant increase in iodic acid with peak concentration above 108 cm-3 is observed. Together with iodic acid, iodine oxide clusters with masses exceeding 2000 Da are observed.