Dataciencia

Colección SciELO Chile

Ice thickness of the northern half of the Patagonia Icefields of South America from high-resolution airborne gravity surveys

Indexado

Scopus

SCOPUS_ID:84954422743

DOI

10.1002/2015GL066728

Año

2016

Tipo

Citas Totales

Autores Afiliación Chile

Instituciones Chile

% Participación
Internacional

Autores
Afiliación Extranjera

Instituciones
Extranjeras

Abstract

We employ high-resolution, high-precision, helicopter-borne gravity observations of the Northern (NPI) and Southern Patagonia Icefields (SPI), South America, to infer ice thickness and bed topography using a three-dimensional model constrained by Fjord and lake bathymetry, and a land-ice mask. The results reveal thicker ice than the reflecting horizon of radar sounders, with 1 km deep ice for Glaciar San Rafael and Colonia (NPI) and 1.5 km deep ice for Glaciar Occidental (SPI). These bedrock troughs channelize fast motion of ice from the plateaus. Combining ice motion and thickness, we calculate balance accumulation levels of 3–6 m/yr water equivalent for the plateaus. Bed elevation remains below sea/lake level 15–20 km inland for Jorge Montt and O’Higgins, which favors retreat, and is at sea level for San Rafael, which halted its retreat. The results demonstrate the utility of airborne gravity surveys for providing critical data on ice volume, bed elevation, and balance accumulation of temperate ice masses.

Revista

Revista	ISSN
Geophysical Research Letters	0094-8276

Métricas Externas

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Disciplinas de Investigación

WOS
Geosciences, Multidisciplinary

Scopus
Sin Disciplinas

SciELO
Sin Disciplinas

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Publicaciones WoS (Ediciones: ISSHP, ISTP, AHCI, SSCI, SCI), Scopus, SciELO Chile.

Colaboración Institucional

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Autores - Afiliación

Ord.	Autor	Género	Institución - País
1	Gourlet, P.	-	University of California, Irvine - Estados Unidos
2	Rignot, Eric	Hombre	University of California, Irvine - Estados Unidos Jet Propulsion Laboratory - Estados Unidos
3	RIVERA-IBANEZ, ANDRES	Hombre	Centro de Estudios Científicos - Chile
4	CASASSA-ROGAZINSKI, GINO	Hombre	Geoestudios - Chile Universidad de Magallanes - Chile

Muestra la afiliación y género (detectado) para los co-autores de la publicación.

Financiamiento

Fuente
Gordon and Betty Moore Foundation
National Aeronautics and Space Administration
CECs
California Institute of Technology
Jet Propulsion Laboratory
University of California, Irvine
University of California Irvine

Muestra la fuente de financiamiento declarada en la publicación.

Agradecimientos

Agradecimiento
This work was performed at the University of California Irvine under grant 3280 from the Gordon and Betty Moore Foundation and at the Jet Propulsion Laboratory, California Institute of Technology under a grant with NASA. We thank R. Zamora and D. Ulloa from CECS for their assistance, and N. Glasser and one anonymous reviewer for comments on the manuscript. The gravity data are available upon request from the authors and at the National Snow and Ice Data Center, Boulder CO.

Agradecimiento

This work was performed at the University of California Irvine under grant 3280 from the Gordon and Betty Moore Foundation and at the Jet Propulsion Laboratory, California Institute of Technology under a grant with NASA. We thank R. Zamora and D. Ulloa from CECS for their assistance, and N. Glasser and one anonymous reviewer for comments on the manuscript. The gravity data are available upon request from the authors and at the National Snow and Ice Data Center, Boulder CO.