Chemistry of the Antarctic Boundary Layer and the Interface with Snow: an overview of the CHABLIS campaign A. E. Jones1, E. W. Wolff1, R. A. Salmon1, S. J.-B. Bauguitte1, H. K. Roscoe1, P. S. Anderson1, D. Ames2, K. C. Clemitshaw2,*, Z. L. Fleming2,**, W. J. Bloss3,***, D. E. Heard3, J. D. Lee3,****, K. A. Read3,****, P. Hamer4, D. E. Shallcross4, A. V. Jackson5, S. L. Walker5, A. C. Lewis6, G. P. Mills7, J. M. C. Plane7,*****, A. Saiz-Lopez7,******, W. T. Sturges7, and D. R. Worton7,******* 1British Antarctic Survey, Natural Environment Research Council, High Cross, Madingley Road, Cambridge, CB3 0ET, UK 2Dept. of Environmental Science and Technology, Imperial College of Science, Technology and Medicine, Ascot, UK 3School of Chemistry, University of Leeds, Woodhouse Lane, Leeds, LS2 9JT, UK 4School of Chemistry, University of Bristol, Cantock's Close, Clifton, Bristol, BS8 1TS, UK 5Institute for Atmospheric Science, School of Earth and Environment, University of Leeds, Leeds, LS2 9JT, UK 6Department of Chemistry, University of York, Heslington, York, YO10 5DD, UK 7University of East Anglia, School of Environmental Sciences, Norwich, NR4 7TJ, UK *now at: Dept. Geology, Royal Holloway, University of London, Egham, Surrey, TW20 0EX, UK **now at: University of Leicester, Leicester, UK ***now at: School of Geography, Earth and Environmental Sci., Univ. of Birmingham, Edgbaston, Birmingham, B15 2TT, UK ****now at: Department of Chemistry, University of York, Heslington, York, YO10 5DD, UK *****now at: School of Chemistry, University of Leeds, Woodhouse Lane, Leeds, LS2 9JT, UK ******now at: Earth And Space Science Division, Jet Propulsion Laboratory, California Institute of Technology, USA *******now at: Department of Environmental Science, Policy and Management, University of California – Berkeley, Berkeley, CA 94720-3110, USA
Abstract. CHABLIS (Chemistry of the Antarctic Boundary Layer and
the Interface with Snow) was a collaborative UK research project aimed at
probing the detailed chemistry of the Antarctic boundary layer and the
exchange of trace gases at the snow surface. The centre-piece to CHABLIS was
the measurement campaign, conducted at the British Antarctic Survey station,
Halley, in coastal Antarctica, from January 2004 through to February 2005.
The campaign measurements covered an extremely wide range of species
allowing investigations to be carried out within the broad context of
boundary layer chemistry. Here we present an overview of the CHABLIS
campaign. We provide details of the measurement location and introduce the
Clean Air Sector Laboratory (CASLab) where the majority of the instruments
were housed. We describe the meteorological conditions experienced during
the campaign and present supporting chemical data, both of which provide a
context within which to view the campaign results. Finally we provide a
brief summary of highlights from the measurement campaign. Unexpectedly high
halogen concentrations profoundly affect the chemistry of many species at
Halley throughout the sunlit months, with a secondary role played by
emissions from the snowpack. This overarching role for halogens in coastal
Antarctic boundary layer chemistry was completely unanticipated, and the
results have led to a step-change in our thinking and understanding.
Citation: Jones, A. E., Wolff, E. W., Salmon, R. A., Bauguitte, S. J.-B., Roscoe, H. K., Anderson, P. S., Ames, D., Clemitshaw, K. C., Fleming, Z. L., Bloss, W. J., Heard, D. E., Lee, J. D., Read, K. A., Hamer, P., Shallcross, D. E., Jackson, A. V., Walker, S. L., Lewis, A. C., Mills, G. P., Plane, J. M. C., Saiz-Lopez, A., Sturges, W. T., and Worton, D. R.: Chemistry of the Antarctic Boundary Layer and the Interface with Snow: an overview of the CHABLIS campaign, Atmos. Chem. Phys., 8, 3789-3803, doi:10.5194/acp-8-3789-2008, 2008.