Bedrock response to Llanquihue Holocene and present‐day glaciation in southernmost South America
Abstract
Modern geodetic techniques, such as precise Global Positioning System (GPS) measurements and high resolution space gravity mapping, make it possible to measure the present‐day rate of viscoelastic gravitational Earth response to present and past glacier mass change. Patagonia is a rapidly evolving glacial environment. Over the past decade, the local rate of surface stress unloading may be the largest anywhere on the planet. We compute the present‐day land uplift rate that could be observed using bedrock GPS measurements. The Little Ice Age (LIA) of the past half millennium generates large vertical rates since the underlying mantle material is likely to have anomalously low viscosity owing to late‐Neogene ridge subduction.
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GNSS-measured data show ongoing vertical rock uplift rates between 18 ± 3 and 41 ± 3 mm yr−1 in the northern part (18-50.5°S) of the SPI, decreasing to values between 2 ± 6 and 17 ± 5 mm yr−1 in its southern part (50.5-51.5°S).
“GNSS-measured data show ongoing vertical rock uplift rates between 18 ± 3 and 41 ± 3 mm yr -1 in the northern part (18-50.5°S) of the SPI (Fig. 1b), decreasing to val-ues between 2 ± 6 and 17 ± 5 mm yr -1 in its southern part (50.5-51.5°S) (Ivins and James, 2004;Dietrich et al., 2010;Lange et al., 2014;Richter et al., 2016;Lenzano et al., 2023).”
From Fast uplift in the southern Patagonian Andes due to long- and short-term deglaciation and the asthenospheric window underneath (2024) · cites this paper as Ivins and James, 2004
A longer-term contribution from the viscous lithosphere is necessary to explain the GNSS-measured uplift rates.
“a longer-term contribution from the viscous lithosphere is necessary to explain the GNSS-measured uplift rates”
From Fast uplift in the southern Patagonian Andes due to long- and short-term deglaciation and the asthenospheric window underneath (2024) · cites this paper as Ivins and James, 2004
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References 29 · Cited by 71
- Authors
- Ivins, E. R., & James, T. S.
- Affiliations
- Jet Propulsion Laboratory (US)
- Geological Survey of Canada (CA)
- Venue
- Geophysical Research Letters
- Publisher
- American Geophysical Union (AGU)
- Published
- 2004-12
- Volume
- 31
- Issue
- 24
- ISSN
- 0094-8276 (ISSN-L)
- 1944-8007
- OpenAlex
- W2029362687
- Cited by
- 71
- References
- 29
- Citations by year
- 2026: 1 · 2025: 3 · 2024: 3 · 2023: 7 · 2022: 1 · 2021: 7 · 2020: 7 · 2019: 5 · 2018: 5 · 2017: 1 · 2016: 4 · 2015: 3 · 2014: 2 · 2013: 1 · 2012: 3
- FWCI
- 1.81
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Geophysical Research Letters (publishedVersion)
- Publication Database GFZ (GFZ German Research Centre for Geosciences) (submittedVersion)
- Funders
- National Aeronautics and Space Administration
- Topics
- Physical Sciences › Earth and Planetary Sciences › Atmospheric Science › Cryospheric studies and observations
- Physical Sciences › Earth and Planetary Sciences › Oceanography › Geophysics and Gravity Measurements
- Physical Sciences › Earth and Planetary Sciences › Atmospheric Science › Geology and Paleoclimatology Research
- Keywords
- bedrock uplift, Llanquihue, Holocene glaciation, Little Ice Age, GPS data, mantle viscosity, ridge subduction, Patagonia, glacial isostatic adjustment
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