Journal article

A case study of a transported bromine explosion event in the Canadian High Arctic

X Zhao, K Strong, C Adams, R Schofield, X Yang, A Richter, U Friess, AM Blechschmidt, JH Koo

Journal of Geophysical Research: Atmospheres | American Geophysical Union | Published : 2016

Abstract

Ozone depletion events in the polar troposphere have been linked to extremely high concentrations of bromine, known as bromine explosion events (BEE). However, the optimum meteorological conditions for the occurrence of these events remain uncertain. On 4–5 April 2011, a combination of both blowing snow and a stable shallow boundary layer was observed during a BEE at Eureka, Canada (86.4°W, 80.1°N). Measurements made by a Multi-Axis Differential Optical Absorption Spectroscopy spectrometer were used to retrieve BrO profiles and partial columns. During this event, the near-surface BrO volume mixing ratio increased to ~20 parts per trillion by volume, while ozone was depleted to ~1 ppbv from t..

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University of Melbourne Researchers

Grants

Awarded by Australian Research Councils Centre of Excellence scheme


Awarded by Natural Environment Research Council


Funding Acknowledgements

The authors gratefully acknowledge the support from CANDAC funding agencies: ARIF, AIF/NSRIT, CFCAS, CFI, CSA, EC, GOC-IPY, INAC, NSERC, NSTP, OIT, ORF, PCSP, and SEARCH. We thank CANDAC/PEARL PI James R. Drummond, PEARL site manager Pierre Fogal, the CANDAC operators, and Environment Canada Eureka Weather Station staff for logistical and operational support at Eureka. The spring 2011 PEARL-GBS measurements were also supported by the Canadian Arctic ACE Validation Campaigns (Co-PI Kaley Walker), which were funded by Canadian Space Agency. The PEARL-GBS and MMCR data are available from CANDAC (http://www.candac.ca). The ozonesonde and radiosonde data for this paper are available through the Canadian Arctic ACE Validation Campaigns (http://acebox.uwaterloo.ca/eureka/Eureka2011/). Any additional data may be obtained from Xiaoyi Zhao (email: xizhao@atmosp.physics.utoronto.ca). X. Zhao is partially supported by the NSERC CREATE Training Program in Arctic Atmospheric Science. R. Schofield received funding support for this work from the Australian Research Councils Centre of Excellence (CE110001028) scheme. Ozonesonde, radiosonde, and MMCR measurements were provided by David Tarasick, David Hudak, and Peter Rodriguez at Environment Canada. The QDOAS software and AMFs were provided by C. Fayt, F. Hendrick, and M. Van Roozendael at IASB-BIRA. Many thanks to Alexei Rozanov from IUP Bremen for providing the SCIATRAN radiative transfer model. We also want to thank Paul Telford and John Pyle at the University of Cambridge for supporting the UM-UKCA model integration. We thank the NSIDC, University of Colorado, the NOAA Air Resources Laboratory, and the ECMWF for providing data sets and models. NCEP Reanalysis data were provided by the NOAA/OAR/ESRL PSD, Boulder, Colorado.