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Processing Snowstreamer Seismic Reflection Data from the ANDRILL McMurdo Ice Shelf Drill Site, Antarctica Abstract During the austral summer of 2006-2007 the Antarctic Geological DRILLing Program (ANDRILL) drilled a stratigraphic hole from a platform located on the northwest corner of Ross Ice Shelf—the McMurdo Ice Shelf (MIS). The primary focus of this research is to determine past ice-shelf responses to climate forcing. In preparation for drilling, a series of seismic reflection profiles were collected during the austral summer of 2005 in this region of the McMurdo Ice Shelf so that an optimum drill site could be selected. These data were collected by a New Zealand team using conventional ground-motion sensor geophones, that couple to the ground by way of long spikes that are pushed into the snow and ice at the ground surface. At the same time, a United States team gathered a comparison data set at the same site. This second survey used gimbaled geophones attached to a snowstreamer instead of conventional spiked geophones. Snow streamer data can be collected much faster than data gathered using conventional spiked geophones. The purpose of this snowstreamer test was to see how well streamer data compares with the conventional data, with the overall goal to decide whether a snowstreamer could be used productively on an ice shelf. I processed the streamer data from the Ross Ice Shelf. These data show high-resolution seismic reflections that are caused by stratigraphic boundaries beneath the ocean bottom. These results suggest that a snowstreamer is a viable option for collecting seismic reflection data over the Ross Ice Shelf. Biography
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