USAP-DC

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Hydrogen Peroxide, Formaldehyde, and Sub-Annual Snow Accumulation in West Antarctica: Participation in West Antarctic Traverse Start Date: 1999-03-01 End Date: 2004-12-31 Description/Abstract This award supports a project to improve understanding of atmospheric photochemistry over West Antarctica, as recorded in snow, firn and ice. Atmospheric and firn sampling will be undertaken as part of the U.S. International Trans-Antarctic Scientific Expedition (US ITASE) traverses. Measurements of hydrogen peroxide (H2O2) and formaldehyde (HCHO) will be made on these samples and a recently developed, physically based atmosphere-to-snow transfer model will be used to relate photochemical model estimates of these components to the concentrations of these parameters in the atmosphere and snow. The efficiency of atmosphere-to-snow transfer and the preservation of these components is strongly related to the rate and timing of snow accumulation. This information will be obtained by analyzing the concentration of seasonally dependent species such as hydrogen peroxide, nitric acid and stable isotopes of oxygen. Collection of samples along the US ITASE traverses will allow sampling at a wide variety of locations, reflecting both a number of different depositional environments and covering much of the West Antarctic region. Personnel Person Role Bales, Roger Investigator Frey, Markus Co-Investigator McConnell, Joseph Co-Investigator Funding Antarctic Glaciology Award # 9814810 Antarctic Organisms and Ecosystems Award # 9814810 AMD - DIF Record(s) NSIDC-0394_1 NSIDC-0392_1 Data Management Plan None in the Database Product Level: Not provided Datasets Repository Title (link) Format(s) Status USAP-DC Twenty-Three Century-scale Ice Core Records of Hydrogen Peroxide (H2O2) from West Antarctica None exist USAP-DC Atmospheric Mixing Ratios of Hydroperoxides above the West Antarctic Ice Sheet None exist Keywords Antarctic Antarctic Ice Sheet Antarctica Hydrogen Peroxide Ice Core Ice Core Chemistry Ice Core Data Ice Core Gas Records Polar Firn Air Shallow Firn Air Snow Chemistry US ITASE West Antarctic Ice Sheet West Antarctica Platforms and Instruments FIELD INVESTIGATION FIELD SURVEYS FLUORESCENCE SPECTROSCOPY GAS SENSORS LABORATORY