Chad Dick sampling surface snow

Antarctica NZ Data

Image Number91-227

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DescriptionChad Dick sampling surface snowDepictsChad DickPhotographerCath GilmourUnknownSeason1990-1991Date Taken1990-1991 SeasonOriginalFilmNo. People1

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KeywordTaxonomy (OLD)Science|Atmospheric sciences|NotesPollutants a preliminary study of ultra-trace pollutants in Antarctic snow and air will be undertaken by Dr Chad Dick and Jane Orange from the Chemistry Division of DSIR in Wellington. Samples will be collected at a site on the Ross Ice Shelf| approximately 100 km east of Scott Base. Air will be analysed for a range of toxic pollutant heavy metals including lead| cadmium| mercury| copper and zinc| and for persistent toxic organic pollutants such as dioxins and pesticides. Natural crustal aluminium and marine sodium and magnesium reference elements will also be determined .Snow samples will be processed for onsite determination of mercury levels and for subsequent toxic organic analysis in New Zealand. Further samples will be returned frozen to New Zealand for metals analysis in Chemistry Division's Ultraclean laboratory. Surface snow will be compared to older snow collected from a hand-dug pit| in order to establish a historical record of levels of these pollutants in the Antarctic atmosphere. These results will yield information on the relative strengths of natural and human sources of these toxic heavy metals

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Chad Dick

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