Temperature, humidity, and ionisation effect of iodine oxoacid nucleation

Abstract

Iodine oxoacids are recognised for their significant contribution to the formation of new particles in coastal and polar atmospheres. Nevertheless, to incorporate the iodine oxoacid nucleation mechanism into global simulations,...

Photochemical Mechanisms in Atmospherically Relevant Iodine Oxide Clusters

“…Furthermore, mixed IOPs containing iodic acid and any less acidic species are likely to deprotonate iodic acid, and clusters including sulfuric acid and ammonia have been observed. , Thus, these anionic clusters can also be viewed as likely subunits of larger pure or mixed IOPs. Despite the findings suggesting that iodine oxoacid nucleation is the dominant nucleation pathway above 0.008% relative humidity, another study determined clustering of iodine oxides was still the primary IOP formation pathway even at high relative humidities . Computational results found that clustering between an iodine oxoacid molecule and an I 2 O 4 or I 2 O 5 molecule is energetically favorable and likely enhances the formation of larger iodine oxides, suggesting iodine oxoacids may play an indirect role in IOP formation …”