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Volume 10, issue 23
Atmos. Chem. Phys., 10, 11921–11930, 2010
https://doi.org/10.5194/acp-10-11921-2010
© Author(s) 2010. This work is distributed under
the Creative Commons Attribution 3.0 License.
Atmos. Chem. Phys., 10, 11921–11930, 2010
https://doi.org/10.5194/acp-10-11921-2010
© Author(s) 2010. This work is distributed under
the Creative Commons Attribution 3.0 License.

Research article 14 Dec 2010

Research article | 14 Dec 2010

Ground-based remote sensing of an elevated forest fire aerosol layer at Whistler, BC: implications for interpretation of mountaintop chemistry

I. G. McKendry1, J. Gallagher1, P. Campuzano Jost2, A. Bertram2, K. Strawbridge3, R. Leaitch4, and A. M. Macdonald4 I. G. McKendry et al.
  • 1Department of Geography, The University of British Columbia, Vancouver, Canada
  • 2Department of Chemistry, The University of British Columbia, Vancouver, Canada
  • 3Centre for Atmospheric Research Experiments, Environment Canada, Egbert, Canada
  • 4Science and Technology Branch, Environment Canada, Toronto, Canada

Abstract. On 30 August 2009, intense forest fires in interior British Columbia (BC) coupled with winds from the east and northeast resulted in transport of a broad forest fire plume across southwestern BC. The physico-chemical and optical characteristics of the plume as observed from Saturna Island (AERONET), CORALNet-UBC and the Whistler Mountain air chemistry facility were consistent with forest fire plumes that have been observed elsewhere in continental North America. However, the importance of three-dimensional transport in relation to the interpretation of mountaintop chemistry observations is highlighted on the basis of deployment of both a CL31 ceilometer and a single particle mass spectrometer (SPMS) in a mountainous setting. The SPMS is used to identify the biomass plume based on levoglucosan and potassium markers. Data from the SPMS are also used to show that the biomass plume was correlated with nitrate, but not correlated with sulphate or sodium. This study not only provides baseline measurements of biomass burning plume physico-chemical characteristics in western Canada, but also highlights the importance of lidar remote sensing methods in the interpretation of mountaintop chemistry measurements.

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