Artículo
Ice Thickness and Bed Elevation of the Northern and Southern Patagonian Icefields
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.
Fecha de publicación:
06/2019
Editorial:
American Geophysical Union
Revista:
Geophysical Research Letters
ISSN:
0094-8276
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
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.
Archivos asociados
Licencia
Identificadores
Colecciones
Articulos(IANIGLA)
Articulos de INST. ARG. DE NIVOLOGIA, GLACIOLOGIA Y CS. AMBIENT
Articulos de INST. ARG. DE NIVOLOGIA, GLACIOLOGIA Y CS. AMBIENT
Citación
Millan, R.; Rignot, E.; Rivera, A.; Martineau, V.; Mouginot, J.; et al.; Ice Thickness and Bed Elevation of the Northern and Southern Patagonian Icefields; American Geophysical Union; Geophysical Research Letters; 46; 12; 6-2019; 6626-6635
Compartir
Altmétricas