2014 GSA Annual Meeting in Vancouver, British Columbia (19–22 October 2014)

Paper No. 334-5
Presentation Time: 1:50 PM

VARIABILITY IN FIRN DENSIFICATION RATES ON THE TAKU GLACIER, SOUTHEAST ALASKA


KING, Daniel R., Geology, SUNY Oneonta, Oneonta, NY 12302, KENNY, Elizabeth, Earth and Oceanographic Science, Bowdoin College, Brunswick, ME 04011, ALWAKEEL, Julian, Geological Sciences, Florida International University, Miami, FL 33199, IVIE, Josh, Geoscience and Geography, Tarleton State University, Stephenville, TX 76550, STARON, Michael, Geology, Keene State College, Keene, NH 03435, RIVERMAN, Kiya, Geosciences, Penn State University, University Park, PA 16802 and VOIGT, Donald, Dept of Geosciences, Penn State University, 209 DEIKE bldg, University Park, PA 16802, Kingdr19@suny.oneonta.edu

Firn densification modeling plays an important role in several types of glaciology and ice dynamics studies. However, some processes that affect firn densification rates have not yet been thoroughly described. Prior studies of firn densification processes have widely focused on the effects of temperature and accumulation; the impact of regional ice stress on these processes has been largely overlooked. Using standard methods of seismic refraction on the Taku Glacier in Southeast Alaska, we have created firn density profiles for areas of both low and high strain. Through comparison of these profiles, we are able to analyze the effects of strain on firn densification rates for a particular glacial setting.