Summary

Measurements of a number of atmospheric components will be undertaken over 1 year-­old sea ice off East Antarctica as part of the Sea Ice Physics EXperiment (SIPEX II) during September and October 2012. SIPEX II is an integrated and multi-­disciplinary study of physical and ecological sea ice processes on small to regional scales which aims to enhance our understanding of sea ice in Antarctic climate and ecosystem processes. A number of atmospheric measurements will be made, including mercury (total in-­situ), ozone (in-­situ and column), halocarbons (in-­situ using GC-­ECD), particle number (in-­situ) and aerosol and trace gas (e.g. BrO, NO2, IO) concentration profiles (using UV-­Vis Multi-­AXis Differential Optical Absorption Spectrometry (MAX-­DOAS)). Presented here are preliminary atmospheric composition results from the campaign which aims to develop our understanding of a number of atmospheric and environmental phenomena including the reactive chemistry and biological impact of mercury; the chemistry of new particle formation; and the physics and presence of column aerosol and its local climate implications.

Authors:Humphries R. Gionfriddo C. Moreau J. Tate M. Krabbenhoft D. Keywood M. Wilson S. Galbally I. Kreher K. Johnston P. Thomas A. Robinson A. Harris N. Klekociuk A.R. Alexander S. Schofield R. Published in: 2013 Category 3: Verbal presentation Program area: Climate Processes and Change
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Humphries R., Gionfriddo C., Moreau J., Tate M., Krabbenhoft D., Keywood M., Wilson S., Galbally I., Kreher K., Johnston P., Thomas A., Robinson A., Harris N., Klekociuk A.R., Alexander S., Schofield R. (2013) Atmospheric measurements over East Antarctic melting spring sea ice during SIPEX II, Australian Meteorological and Oceanographic Society (AMOS) National Conference, Melbourne, Australia, 11-13 February 2013 .; http://wired.ivvy.com/event/WXOCCX/;

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