University of Michigan
Department of Geological Sciences
Ann Arbor, Michigan
Supporting Stations: McMurdo Station
Research Locations: Taylor Glacier
The primary objective of this project is to apply high-precision geochemical techniques to the Taylor Dome ice core and the high-volume, high-resolution horizontal ice core at Taylor Glacier to: (1) deconvolve regional versus global aerosol flux sources; (2) determine if the changing climate and weather in the Ross Sea region from the Last Glacial Maximum (LGM) 21,000 years ago through the Preboreal Holocene is recorded by aerosol compositional changes; and (3) provide a discretized record of southern hemisphere dust through the Younger Dryas and Antarctic Cold Reversal.
The researchers will use ice from the Taylor Dome core and exposed ice from Taylor Glacier to measure variations in the isotopic composition of strontium (Sr), neodymium (Nd) and hafnium (Hf), trace element concentrations, major anions, and cations and dust-size data in order to assign provenance of dust within the ice. The resulting provenance information will be used to investigate the dust-flux response to large, rapid regional and global (hemispheric) climate changes on a millenia scale. Researchers will also collect large-sized samples of known age based on the methane and oxygen isotope composition of the trapped gases.
Field Season Overview:
A team of five will fly to the camp at lower Taylor Glacier where they will share facilities and the use of a blue ice drill with another project (Petrenko, I-159) for approximately 30 days. They will then traverse from the lower camp site to a site higher up on the glacier and continue sampling. At both sites they will be collecting drill cores; 50 large (100 pound) samples will be collected from the lower site and 10 from the upper site
Deploying Team Members:
Sarah Aciego (PI)