z-logo
open-access-imgOpen Access
Iodine speciation and deposition fluxes from the marine atmosphere
Author(s) -
Baker A. R.,
Tunnicliffe C.,
Jickells T. D.
Publication year - 2001
Publication title -
journal of geophysical research: atmospheres
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.67
H-Index - 298
eISSN - 2156-2202
pISSN - 0148-0227
DOI - 10.1029/2000jd000004
Subject(s) - iodate , iodine , iodide , deposition (geology) , aerosol , atmosphere (unit) , environmental chemistry , scavenging , precipitation , chemistry , volatilisation , environmental science , inorganic chemistry , geology , meteorology , organic chemistry , paleontology , physics , sediment , antioxidant
The concentration and speciation of iodine have been determined in wet and dry deposition at a coastal site over a 15‐month period. Deposition fluxes in rain (2.7 μmol m −2 yr −1 ) and aerosol (3.6–6.5 μmol m −2 yr −1 ) are the major routes for removal of iodine from the marine atmosphere onto the Earth's surface, with only a minor contribution from direct deposition of methyl iodide (0.003–0.17 μmol m −2 yr −1 ). Iodate (IO 3 − ) is often considered to be the only species of iodine that is permanently removed to the aerosol phase, and IO 3 − may therefore be expected to be the dominant form of iodine in precipitation. However, iodide (I − ) was found to constitute a significant fraction (5–100%) of iodine in both rain and aerosol. This implies that the rates of iodate formation and iodide volatilization (through reaction with hypohalous acids) are relatively slow. A third pool of aerosol iodine (nonvolatile organic compounds) may also contribute to removal of iodine from the atmosphere in dry or wet deposition.

The content you want is available to Zendy users.

Already have an account? Click here to sign in.
Having issues? You can contact us here