 |
| Titel |
Sources of iodine in the tropical marine boundary layer |
| VerfasserIn |
R. Sommariva, R. von Glasow, C. E. Jones, K. E. Hornsby, L. J. Carpenter, G. McFiggans |
| Konferenz |
EGU General Assembly 2009
|
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 11 (2009) |
| Datensatznummer |
250029191
|
|
|
|
|
|
| Zusammenfassung |
| The importance of halogens in the chemical processes of the marine
boundary layer has long been recognized, although many uncertainties
remain. The role of iodine is particularly uncertain, especially with
regard to its atmospheric sources. In this work, iodine chemistry in
the tropical marine boundary layer was studied using a one dimensional
model constrained to measured fluxes of iodinated hydrocarbons.
The concentrations of iodocarbons were simultaneously measured in
marine air and water during the RHaMBLe cruise, which took place in
May-June 2007 around the Cape Verde archipelago. The sea-air fluxes of
selected iodocarbons calculated from these measurements were used in a
1-D model to calculate the atmospheric concentrations of inorganic
iodine species in the marine boundary layer at the latitude of Cape
Verde (17 degrees N). The model was a revised version of MISTRA, with
an updated module of gas-phase inorganic and DMS chemistry, and
included the new iodine aqueous-phase chemical mechanism developed by
Pechtl et al. (2007).
The model results were qualitatively compared with the observations of
IO taken at the Cape Verde Atmospheric Observatory during a previous
campaign. The model was then used to determine the role of the
measured iodocarbons as sources of iodine in the marine boundary layer
and to study their impact on the concentration of tropospheric ozone. |
|
|
|
|
|
|