FastFind »   Lastname: doi:10.1029/ Year: | Advanced Search  

AGU: Geophysical Research Letters

 

Keywords

  • iodine photochemistry
  • iodine dioxide (OIO)
  • tropospheric ozone

Index Terms

  • Atmospheric Composition and Structure: Chemical kinetic and photochemical properties
  • Atmospheric Composition and Structure: Geochemical cycles
  • Atmospheric Composition and Structure: Troposphere: composition and chemistry

Abstract

Photochemistry of OIO: Laboratory study and atmospheric implications

Juan C. Gómez Martín

School of Chemistry, University of Leeds, Leeds, UK

Stephen H. Ashworth

School of Chemical Sciences and Pharmacy, University of East Anglia, Norwich, UK

Anoop S. Mahajan

School of Chemistry, University of Leeds, Leeds, UK

John M. C. Plane

School of Chemistry, University of Leeds, Leeds, UK

Iodine chemistry influences the oxidizing capacity of the atmosphere, principally by depleting ozone, and induces the formation of new particles in the marine boundary layer. The photochemistry of iodine dioxide (OIO) plays a key role in both these processes. Here we report that OIO photolyses in the visible (480–650 nm), yielding iodine atoms with a quantum efficiency of unity (1.07 ± 0.15). As a result, much smaller sources of iodine precursors are required to cause significant ozone depletion, which has important implications for the marine boundary layer ozone budget.

Received 6 February 2009; accepted 26 March 2009; published 1 May 2009.

Citation: Gómez Martín, J. C., S. H. Ashworth, A. S. Mahajan, and J. M. C. Plane (2009), Photochemistry of OIO: Laboratory study and atmospheric implications, Geophys. Res. Lett., 36, L09802, doi:10.1029/2009GL037642.

Cited By

Please wait one moment ...