Glaciares de Chile


"Ice thickness measurements on the Southern Patagonia Icefield"

Rivera, A. & Casassa, G. (2002) : «Ice thickness measurements on the Southern Patagonia Icefield» In: The Patagonian Icefields. A unique natural laboratory for environmental and climate change studies. CASASSA, G., F. SEPÚLVEDA & R. SINCLAIR (Eds.) Kluwer Academic/Plenum Publishers, New York, pp. 101-115.

Resumen / Abstract.

The first detailed ice thickness measurements in the accumulation area of the Southern Patagonia Icefield have been obtained with a radio-echo sounding system, revealing a complex subglacial topography and internal reflection pattern. A ground-based digital impulse radar system at 2.5 MHz was used to obtain continuous profiles of the subglacial topography. the system was mounted on sledges that were pulled by a snowmobile, allowing for coverage of extensive areas in short periods of time. Two GPS receivers were used simultaneously and a differential correction method was applied for obtaining a precise geographic position at each thickness measurement.