Cited by 141Cryospheric studies and observationsGeology and Paleoclimatology ResearchGeophysics and Gravity Measurements

Ice loss from the Southern Patagonian Ice Field, South America, between 2000 and 2012

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Willis, Michael J., Melkonian, Andrew K., Pritchard, Matthew E., Rivera, Andrés·2012·Geophysical Research Letters

Abstract

A time‐series composed of 156 ASTER derived Digital Elevation Models (DEMs) and a radar‐penetration‐bias corrected version of the Shuttle Radar Topography Mission (SRTM) DEM is used to derive ice surface height and volume changes at the Southern Patagonian Ice Field (SPI) in southern South America. The observations, made between February 2000 and March 2012, indicate that the ice field is rapidly losing volume at many of the largest outlet glaciers, and in most cases thinning extends to the highest elevations of the ice field. Mass loss is occurring at a rate of −20.0 ± 1.2 Gt a−1, which, when summed with mass‐loss at the adjacent Northern Patagonian Ice Field results in a combined rate of −24.4 ± 1.4 Gt a−1, equivalent to +0.067 ± 0.004 mm a−1 of sea level rise. Our decade‐long mass loss rates are substantially higher than those derived during the last three decades of the 20th century, but are in good agreement with recent GRACE observations. Our volume loss estimate is sensitive to constraints applied to the amount of thickening in the accumulation zone. New field measurements and a continued DEM time‐series will be required to refine our estimates.

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  • The models suggest that regional uplift rates in the order of tens of cm yr-1 shall be measured in the next century if the currently observed ice loss rate of at least -20 Gt yr-1 in the SPI continues until the total meltdown of the ice sheet in ∼200 years.

    “our models suggest that we shall measure regional uplift rates in the order of the tens of cm yr -1 in the next century if the currently observed ice loss rate of at least -20 Gt yr -1 in the SPI (Willis et al., 2012) will continue until the total meltdown of the ice sheet in ∼ 200 years.”

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  1. Carrasco, J. F., G. Casassa, and A. Rivera (2002), Meteorological and cli- matological aspects of the Southern Patagonia Ice Field, in The Patago- nian Ice Fields: A Unique Natural Laboratory for Environmental and Climate Change Studies, edited by G. Casassa, F. Sepúlveda, and R. Sin- clair, pp. 29-65, Kluwer Acad., New York.
  2. Casassa, G., A. Rivera, M. Aniya, and R. Naruse (2002), Current knowl- edge of the Southern Patagonia Ice Fields, in The Patagonian Ice Fields: A Unique Natural Laboratory for Environmental and Climate Change Stud- ies, edited by G. Casassa, F. V. Sepúlveda, and R. Sinclair, pp. 67-83, Kluwer Acad., New York.
  3. Melkonian, A. K. (2011), Measuring glacier velocities and elevation change rates from ASTER data for Juneau Ice Field, Alaska, MSc thesis, Cornell Univ., Ithaca, N. Y.
  4. Monahan, P. A., and J. M. Ramage (2010), AMSR-E melt patterns on the Southern Patagonian Ice Field, J. Glaciol., 56(198), 699-708.
  5. Rosenblüth, B., H. A. Fuenzalida, and P. Aceituno (1997), Recent tempera- ture variations in southern South America, Int. J. Climatol., 17(1), 67-85.

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Authors
Willis, M. J., Melkonian, A. K., Pritchard, M. E., & Rivera, A.
Affiliations
  • Cornell University (US)
  • University of Chile (CL)
Corresponding author
Willis, Michael J.
Venue
Geophysical Research Letters
Published
2012-09-05
Volume
39
Issue
17
ISSN
  • 0094-8276 (ISSN-L)
  • 1944-8007
OpenAlex
W1511860755
Cited by
141
References
46
Citations by year
2026: 2 · 2025: 4 · 2024: 5 · 2023: 5 · 2022: 7 · 2021: 9 · 2020: 11 · 2019: 19 · 2018: 14 · 2017: 9 · 2016: 17 · 2015: 16 · 2014: 10 · 2013: 12 · 2012: 1
FWCI
8.53
Type
journal article
Language
en
Open access
Locations
  • Geophysical Research Letters (publishedVersion)
  • Publication Database GFZ (GFZ German Research Centre for Geosciences) (submittedVersion)
Topics
  • Physical Sciences › Earth and Planetary Sciences › Atmospheric Science › Cryospheric studies and observations
  • Physical Sciences › Earth and Planetary Sciences › Atmospheric Science › Geology and Paleoclimatology Research
  • Physical Sciences › Earth and Planetary Sciences › Oceanography › Geophysics and Gravity Measurements
Keywords
ice mass loss, ice volume change, ASTER DEM, SRTM DEM, Patagonian glaciers

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