Widespread persistent near-surface ozone depletion at northern high latitudes in spring

Tao Zeng, Yuhang Wang, Kelly Chance, Edward V. Browell, Brian A. Ridley, Elliot L Atlas

Research output: Contribution to journalArticle

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Abstract

Springtime near-surface ozone depletion has been observed at northern high latitudes. Due to limited observations, the spatial and temporal extent of low O 3 concentrations near the surface is still unknown. A regional 3-D chemistry and transport model is applied to simulate surface O 3 depletion catalyzed by bromine radicals at northern high latitudes in March and April 2000. Satellite observations of BrO column by the ESA Global Ozone Monitoring Experiment (GOME) were processed to specify the BrO concentrations in the lower troposphere. In view of the GOME measurement and model uncertainties, the model results show an adequate agreement with the O 3 depletion events observed at two surface sites, Alert, Canada (82.5°N, 62.3°W) and Barrow, Alaska (71.3°N, 156.6°W), and by airborne in situ and DIAL instrument during the TOPSE experiments at northern high latitudes. Low O 3 events at Alert appear to be mostly driven by transport of O 3-poor air from high BrO regions. Model results indicate that low O 3 concentrations (<20 ppbv) near the surface cover ∼60% of the northern high latitudes and that the depleted O 3 concentrations (<10 ppbv) cover ∼20% of the region in April. The high BrO events tend to be largescale and persistent (1-2 weeks). We find that they are correlated with low temperature, a condition conducive for heterogeneous reactions on frozen snow or aerosol surfaces.

Original languageEnglish (US)
JournalGeophysical Research Letters
Volume30
Issue number24
StatePublished - Dec 15 2003
Externally publishedYes

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ozone depletion
polar regions
GOME
ozone
depletion
differential absorption lidar
satellite observation
bromine
snow
troposphere
European Space Agency
Canada
aerosols
chemistry
aerosol
air

ASJC Scopus subject areas

  • Earth and Planetary Sciences (miscellaneous)

Cite this

Widespread persistent near-surface ozone depletion at northern high latitudes in spring. / Zeng, Tao; Wang, Yuhang; Chance, Kelly; Browell, Edward V.; Ridley, Brian A.; Atlas, Elliot L.

In: Geophysical Research Letters, Vol. 30, No. 24, 15.12.2003.

Research output: Contribution to journalArticle

Zeng, Tao ; Wang, Yuhang ; Chance, Kelly ; Browell, Edward V. ; Ridley, Brian A. ; Atlas, Elliot L. / Widespread persistent near-surface ozone depletion at northern high latitudes in spring. In: Geophysical Research Letters. 2003 ; Vol. 30, No. 24.
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AU - Atlas, Elliot L

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