Title Geophysical observations of polar ice sheets and ice shelves
Author Horgan, H.J.
Source 101p. . Availability: Univ. Microfilms, Ann Arbor, MI, United States. ISBN: 978-1-109-65867-5
Publication Date 2009
Notes In English. Ph.D. thesis. Ant. Acc. No: 91636. GeoRef Acc. No: 310236
Index Terms geophysical surveys; glacial geology; glaciers; ice sheets; ice shelves; mass balance; melting; seismic surveys; surveys; Greenland--Greenland ice sheet; Antarctica-- Ross Ice Shelf; Antarctica--West Antarctic ice sheet; Antarctic ice sheet; Antarctica; Arctic region; geophysical methods; Greenland; Greenland ice sheet; ICESat; Jakobshavn Isbrae; rates; Ross Ice Shelf; satellite methods; seismic methods; Siple Coast; West Antarctic ice sheet
Abstract Knowledge of processes, dynamics, and the ongoing mass balance of polar ice sheets is essential if we are to understand the response of the cryosphere to a changing climate. Here we present a series of hypotheses and associated observations and interpretations addressing the West Antarctic and Greenland ice sheets. Specific attention is paid to the grounding line, ice shelf mass balance and crystal orientation fabrics in streaming ice. Initially, GLAS ICESat laser altimetry data is used in an accurate and rapid method of grounding line location. The method exploits the high surface-slope at the grounding line relative to the at ice shelf and ice streams. Validation is performed using ground based observations and comparisons between the modern grounding line and past estimates indicate that the Siple Coast grounding line has been static for at least several decades. (mod. auth. abst.)
Publication Type monograph
Record ID 65007329