Ice Thickness and Bed Elevation of the Northern and Southern Patagonian Icefields

The Northern and Southern Patagonian Icefields are the largest ice masses in the Southern Hemisphere outside Antarctica, but their ice volume and bed topography are poorly known. Here, we combine airborne gravity data collected in 2012 and 2016, with radar data from the Warm Ice Experiment Sounder a...

Full description

Bibliographic Details
Published in:Geophysical Research Letters
Main Authors: Millan, R., Rignot, E., Rivera, A., Martineau, V., Mouginot, J., Zamora, R., Uribe, J., Lenzano, María Gabriela, De Fleurian, B., Li, X., Gim, Y., Kirchner, D.
Format: Article in Journal/Newspaper
Language:English
Published: American Geophysical Union
Subjects:
AIRBORNE GRAVITY
BEDROCK TOPOGRAPHY
ICE THICKNESS
ICE VOLUME
PATAGONIAN ICEFIELDS
RADAR DEPTH SOUNDER
https://purl.org/becyt/ford/2.11
https://purl.org/becyt/ford/2
Patagonia
Argentino
Argentina
Bergen
Noruega
Rivera
Uribe
Fitz Roy
Fitz-Roy
Antarc*
Antarctica
Online Access:http://hdl.handle.net/11336/126646
Description
Summary:The Northern and Southern Patagonian Icefields are the largest ice masses in the Southern Hemisphere outside Antarctica, but their ice volume and bed topography are poorly known. Here, we combine airborne gravity data collected in 2012 and 2016, with radar data from the Warm Ice Experiment Sounder and Centro de Estudios Científicos's to map bed elevation and ice thickness in great detail. We perform a 3-D inversion of the gravity data constrained by radar-derived thickness and fjord bathymetry to infer bed elevation at 500-m spacing, with a precision of about 60 m. We detect deep glacial valleys with ice thickness exceeding 1,400 m and sectors below sea level on the western branch of Glaciar Pio XI, Occidental, between San Rafael and Colonia, and near Fitz Roy. We calculate an ice volume of 4,756 ± 923 km3 for Northern Patagonia Icefield and Southern Patagonia Icefield, or 40 times the volume of glaciers in the European Alps. Fil: Millan, R. University of California at Irvine; Estados Unidos Fil: Rignot, E. University of California; Estados Unidos. Jet Propulsion Laboratory; Estados Unidos. Centro de Estudios Científicos; Chile Fil: Rivera, A. Centro de Estudios Científicos; Chile. Universidad de Chile; Chile Fil: Martineau, V. University of California; Estados Unidos Fil: Mouginot, J. University of California at Irvine; Estados Unidos Fil: Zamora, R. Universidad de Chile; Chile. Centro de Estudios Científicos; Chile Fil: Uribe, J. Centro de Estudios Científicos; Chile Fil: Lenzano, María Gabriela. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Provincia de Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Universidad Nacional de Cuyo. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales; Argentina Fil: De Fleurian, B. University of Bergen; Noruega Fil: Li, X. University of California at Irvine; Estados Unidos Fil: ...

Similar Items