Publication Abstracts

Voulgarakis et al. 2009

Voulgarakis, A., X. Yang, and J.A. Pyle, 2009: How different would tropospheric oxidation be over an ice-free Arctic? Geophys. Res. Lett., 36, L23807, doi:10.1029/2009GL040541.

Climate projections suggest that a complete Arctic sea-ice retreat is likely in the future during summer. Less ice will cause less light reflection and slower tropospheric photolysis. We use a tropospheric chemistry model to examine how oxidation may differ over an ice-free Arctic. We find that late-summer OH concentrations can decrease by 30-60% at polar latitudes, while effects on local ozone and global oxidant abundances are small. Ozone changes become larger in the more extreme case where sea-ice is also removed in spring and early summer. In this case, we find large spring ozone increases (up to 50-60%) over the Arctic, and even over inhabited high latitude regions (up to 20%), due mainly to a reduction in the impact of bromine chemistry, caused by the sea-ice retreat. Annual mean ozone also increases in the run with the summer/spring sea-ice removal, but not in the simulation including only late-summer sea-ice removal.

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BibTeX Citation

  author={Voulgarakis, A. and Yang, X. and Pyle, J. A.},
  title={How different would tropospheric oxidation be over an ice-free Arctic?},
  journal={Geophys. Res. Lett.},

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RIS Citation

ID  - vo02000x
AU  - Voulgarakis, A.
AU  - Yang, X.
AU  - Pyle, J. A.
PY  - 2009
TI  - How different would tropospheric oxidation be over an ice-free Arctic?
JA  - Geophys. Res. Lett.
VL  - 36
SP  - L23807
DO  - 10.1029/2009GL040541
ER  -

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