Investigation of meteorological events preserved in high resolution snow pit and fin core records ...

• Main Author: McMorrow, AJ
• Format: Thesis
• Language: unknown
• Published: University Of Tasmania 2023
• Subjects: East Antarctica; Law Dome; Antarc*; Antarctica; ice core
• Online Access: https://dx.doi.org/10.25959/23208566.v1; https://figshare.utas.edu.au/articles/thesis/Investigation_of_meteorological_events_preserved_in_high_resolution_snow_pit_and_fin_core_records/23208566/1

A key problem in ice core palaeclimate studies is the interpretation of the various measurable parameters in ice in terms of climate and environmental conditions. This study is aimed at developing a closer understanding of the\ connection between high resolution snow/firn measurements and meteorological conditions. Ultra high resolution\ snow pit and shallow firn core records of oxygen isotope ratios (del18O) and a suite of trace chemical species including marine biogenic sulphur compounds (methane sulphonate (MSA), non-sea salt sulphate), nitrate and major sea salt\ ions (sodium, chloride, magnesium), were generated at a high accumulation site on Law Dome, East Antarctica.\ Concordance between accumulation events identified in the records up to 7.7 km apart confirms that the observed\ chemical and isotopic variations are the result of regional rather than local surface effects. This allows calibration of\ the snow pit and firn core records with measured meteorological parameters.\ Event scale dating of the ...