Articles | Volume 17, issue 1
https://doi.org/10.5194/cp-17-419-2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/cp-17-419-2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| Highlight paper
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17 Feb 2021
Research article | Highlight paper |
| 17 Feb 2021
| 17 Feb 2021
In situ cosmogenic 10Be–14C–26Al measurements from recently deglaciated bedrock as a new tool to decipher changes in Greenland Ice Sheet size
Nicolás E. Young
CORRESPONDING AUTHOR
Lamont–Doherty Earth Observatory, Columbia University, Palisades, NY 10964, USA
Alia J. Lesnek
Department of Earth Sciences, University of New Hampshire, Durham, NH 03824, USA
Josh K. Cuzzone
Department of Earth System Science, University of California Irvine, Irvine, CA 92697, USA
Jason P. Briner
Department of Geology, University at Buffalo, Buffalo, NY 14260, USA
Jessica A. Badgeley
Department of Earth and Space Sciences, University of Washington,
Seattle, WA 98195, USA
Alexandra Balter-Kennedy
Lamont–Doherty Earth Observatory, Columbia University, Palisades, NY 10964, USA
Brandon L. Graham
Department of Geology, University at Buffalo, Buffalo, NY 14260, USA
Allison Cluett
Department of Geology, University at Buffalo, Buffalo, NY 14260, USA
Jennifer L. Lamp
Lamont–Doherty Earth Observatory, Columbia University, Palisades, NY 10964, USA
Roseanne Schwartz
Lamont–Doherty Earth Observatory, Columbia University, Palisades, NY 10964, USA
Thibaut Tuna
CEREGE, Aix-Marseille University, CNRS, IRD, INRAE, Collège de
France, Technopôle de l'Arbois, Aix-en-Provence, France
Edouard Bard
CEREGE, Aix-Marseille University, CNRS, IRD, INRAE, Collège de
France, Technopôle de l'Arbois, Aix-en-Provence, France
Marc W. Caffee
Department of Physics and Astronomy, PRIME Lab, Purdue University,
West Lafayette, IN 47907, USA
Department of Earth, Atmospheric, and Planetary Sciences, Purdue
University, West Lafayette, IN 47907, USA
Susan R. H. Zimmerman
Center for Accelerator Mass Spectrometry, Lawrence Livermore National Laboratory, Livermore, CA 94550, USA
Joerg M. Schaefer
Lamont–Doherty Earth Observatory, Columbia University, Palisades, NY 10964, USA
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Adrian M. Bender, Richard O. Lease, Lee B. Corbett, Paul R. Bierman, Marc W. Caffee, James V. Jones, and Doug Kreiner
Earth Surf. Dynam., 10, 1041–1053, https://doi.org/10.5194/esurf-10-1041-2022, https://doi.org/10.5194/esurf-10-1041-2022, 2022
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Jason P. Briner, Caleb K. Walcott, Joerg M. Schaefer, Nicolás E. Young, Joseph A. MacGregor, Kristin Poinar, Benjamin A. Keisling, Sridhar Anandakrishnan, Mary R. Albert, Tanner Kuhl, and Grant Boeckmann
The Cryosphere, 16, 3933–3948, https://doi.org/10.5194/tc-16-3933-2022, https://doi.org/10.5194/tc-16-3933-2022, 2022
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Mae Kate Campbell, Paul R. Bierman, Amanda H. Schmidt, Rita Sibello Hernández, Alejandro García-Moya, Lee B. Corbett, Alan J. Hidy, Héctor Cartas Águila, Aniel Guillén Arruebarrena, Greg Balco, David Dethier, and Marc Caffee
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We used cosmogenic radionuclides in detrital river sediment to measure erosion rates of watersheds in central Cuba; erosion rates are lower than rock dissolution rates in lowland watersheds. Data from two different cosmogenic nuclides suggest that some basins may have a mixed layer deeper than is typically modeled and could have experienced significant burial after or during exposure. We conclude that significant mass loss may occur at depth through chemical weathering processes.
Joshua K. Cuzzone, Nicolás E. Young, Mathieu Morlighem, Jason P. Briner, and Nicole-Jeanne Schlegel
The Cryosphere, 16, 2355–2372, https://doi.org/10.5194/tc-16-2355-2022, https://doi.org/10.5194/tc-16-2355-2022, 2022
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We use an ice sheet model to determine what influenced the Greenland Ice Sheet to retreat across a portion of southwestern Greenland during the Holocene (about the last 12 000 years). Our simulations, constrained by observations from geologic markers, show that atmospheric warming and ice melt primarily caused the ice sheet to retreat rapidly across this domain. We find, however, that iceberg calving at the interface where the ice meets the ocean significantly influenced ice mass change.
Caleb K. Walcott, Jason P. Briner, James F. Baichtal, Alia J. Lesnek, and Joseph M. Licciardi
Geochronology, 4, 191–211, https://doi.org/10.5194/gchron-4-191-2022, https://doi.org/10.5194/gchron-4-191-2022, 2022
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We present a record of ice retreat from the northern Alexander Archipelago, Alaska. During the last ice age (~ 26 000–19 000 years ago), these islands were covered by the Cordilleran Ice Sheet. We tested whether islands were ice-free during the last ice age for human migrants moving from Asia to the Americas. We found that these islands became ice-free between ~ 15 100 years ago and ~ 16 000 years ago, and thus these islands were not suitable for human habitation during the last ice age.
Brendon J. Quirk, Elizabeth Huss, Benjamin J. C. Laabs, Eric Leonard, Joseph Licciardi, Mitchell A. Plummer, and Marc W. Caffee
Clim. Past, 18, 293–312, https://doi.org/10.5194/cp-18-293-2022, https://doi.org/10.5194/cp-18-293-2022, 2022
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Glaciers in the northern Rocky Mountains began retreating 17 000 to 18 000 years ago, after the end of the most recent global ice volume maxima. Climate in the region during this time was likely 10 to 8.5° colder than modern with less than or equal to present amounts of precipitation. Glaciers across the Rockies began retreating at different times but eventually exhibited similar patterns of retreat, suggesting a common mechanism influencing deglaciation.
Irene Schimmelpfennig, Joerg M. Schaefer, Jennifer Lamp, Vincent Godard, Roseanne Schwartz, Edouard Bard, Thibaut Tuna, Naki Akçar, Christian Schlüchter, Susan Zimmerman, and ASTER Team
Clim. Past, 18, 23–44, https://doi.org/10.5194/cp-18-23-2022, https://doi.org/10.5194/cp-18-23-2022, 2022
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Small mountain glaciers advance and recede as a response to summer temperature changes. Dating of glacial landforms with cosmogenic nuclides allowed us to reconstruct the advance and retreat history of an Alpine glacier throughout the past ~ 11 000 years, the Holocene. The results contribute knowledge to the debate of Holocene climate evolution, indicating that during most of this warm period, summer temperatures were similar to or warmer than in modern times.
Sandra M. Braumann, Joerg M. Schaefer, Stephanie M. Neuhuber, Christopher Lüthgens, Alan J. Hidy, and Markus Fiebig
Clim. Past, 17, 2451–2479, https://doi.org/10.5194/cp-17-2451-2021, https://doi.org/10.5194/cp-17-2451-2021, 2021
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Glacier reconstructions provide insights into past climatic conditions and elucidate processes and feedbacks that modulate the climate system both in the past and present. We investigate the transition from the last glacial to the current interglacial and generate beryllium-10 moraine chronologies in glaciated catchments of the eastern European Alps. We find that rapid warming was superimposed by centennial-scale cold phases that appear to have influenced large parts of the Northern Hemisphere.
Andrew J. Christ, Paul R. Bierman, Jennifer L. Lamp, Joerg M. Schaefer, and Gisela Winckler
Geochronology, 3, 505–523, https://doi.org/10.5194/gchron-3-505-2021, https://doi.org/10.5194/gchron-3-505-2021, 2021
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Cosmogenic nuclide surface exposure dating is commonly used to constrain the timing of past glacier extents. However, Antarctic exposure age datasets are often scattered and difficult to interpret. We compile new and existing exposure ages of a glacial deposit with independently known age constraints and identify surface processes that increase or reduce the likelihood of exposure age scatter. Then we present new data for a previously unmapped and undated older deposit from the same region.
Edouard Bard and Timothy J. Heaton
Clim. Past, 17, 1701–1725, https://doi.org/10.5194/cp-17-1701-2021, https://doi.org/10.5194/cp-17-1701-2021, 2021
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We assess the 14C plateau tuning technique used to date marine sediments and determine 14C marine reservoir ages. We identify problems linked to assumptions of the technique, the assumed shapes of the 14C / 12C records, and the sparsity and uncertainties in both atmospheric and marine data. Our concerns are supported with carbon cycle box model experiments and statistical simulations, allowing us to question the ability to tune 14C age plateaus in the context of noisy and sparse data.
Daniel R. Shapero, Jessica A. Badgeley, Andrew O. Hoffman, and Ian R. Joughin
Geosci. Model Dev., 14, 4593–4616, https://doi.org/10.5194/gmd-14-4593-2021, https://doi.org/10.5194/gmd-14-4593-2021, 2021
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This paper describes a new software package called "icepack" for modeling the flow of ice sheets and glaciers. Glaciologists use tools like icepack to better understand how ice sheets flow, what role they have played in shaping Earth's climate, and how much sea level rise we can expect in the coming decades to centuries. The icepack package includes several innovations to help researchers describe and solve interesting glaciological problems and to experiment with the underlying model physics.
Douglas P. Steen, Joseph S. Stoner, Jason P. Briner, and Darrell S. Kaufman
Geochronology Discuss., https://doi.org/10.5194/gchron-2021-19, https://doi.org/10.5194/gchron-2021-19, 2021
Publication in GChron not foreseen
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Paleomagnetic data from Cascade Lake (Brooks Range, Alaska) extend the radiometric-based age model of the sedimentary sequence extending back 21 kyr. Correlated ages based on prominent features in paleomagnetic secular variations (PSV) diverge from the radiometric ages in the upper 1.6 m, by up to about 2000 years at around 4 ka. Four late Holocene cryptotephra in this section support the PSV chronology and suggest the influence of hard water or aged organic material.
Svend Funder, Anita H. L. Sørensen, Nicolaj K. Larsen, Anders A. Bjørk, Jason P. Briner, Jesper Olsen, Anders Schomacker, Laura B. Levy, and Kurt H. Kjær
Clim. Past, 17, 587–601, https://doi.org/10.5194/cp-17-587-2021, https://doi.org/10.5194/cp-17-587-2021, 2021
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Cosmogenic 10Be exposure dates from outlying islets along 300 km of the SW Greenland coast indicate that, although affected by inherited 10Be, the ice margin here was retreating during the Younger Dryas. These results seem to be corroborated by recent studies elsewhere in Greenland. The apparent mismatch between temperatures and ice margin behaviour may be explained by the advection of warm water to the ice margin on the shelf and by increased seasonality, both caused by a weakened AMOC.
Heiko Goelzer, Sophie Nowicki, Anthony Payne, Eric Larour, Helene Seroussi, William H. Lipscomb, Jonathan Gregory, Ayako Abe-Ouchi, Andrew Shepherd, Erika Simon, Cécile Agosta, Patrick Alexander, Andy Aschwanden, Alice Barthel, Reinhard Calov, Christopher Chambers, Youngmin Choi, Joshua Cuzzone, Christophe Dumas, Tamsin Edwards, Denis Felikson, Xavier Fettweis, Nicholas R. Golledge, Ralf Greve, Angelika Humbert, Philippe Huybrechts, Sebastien Le clec'h, Victoria Lee, Gunter Leguy, Chris Little, Daniel P. Lowry, Mathieu Morlighem, Isabel Nias, Aurelien Quiquet, Martin Rückamp, Nicole-Jeanne Schlegel, Donald A. Slater, Robin S. Smith, Fiamma Straneo, Lev Tarasov, Roderik van de Wal, and Michiel van den Broeke
The Cryosphere, 14, 3071–3096, https://doi.org/10.5194/tc-14-3071-2020, https://doi.org/10.5194/tc-14-3071-2020, 2020
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In this paper we use a large ensemble of Greenland ice sheet models forced by six different global climate models to project ice sheet changes and sea-level rise contributions over the 21st century.
The results for two different greenhouse gas concentration scenarios indicate that the Greenland ice sheet will continue to lose mass until 2100, with contributions to sea-level rise of 90 ± 50 mm and 32 ± 17 mm for the high (RCP8.5) and low (RCP2.6) scenario, respectively.
Joseph P. Tulenko, William Caffee, Avriel D. Schweinsberg, Jason P. Briner, and Eric M. Leonard
Geochronology, 2, 245–255, https://doi.org/10.5194/gchron-2-245-2020, https://doi.org/10.5194/gchron-2-245-2020, 2020
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We investigate the timing and rate of retreat for three alpine glaciers in the southern Rocky Mountains to test whether they followed the pattern of global climate change or were majorly influenced by regional forcing mechanisms. We find that the latter is most likely for these glaciers. Our conclusions are based on a new 10Be chronology of alpine glacier retreat. We quantify retreat rates for each valley using the BACON program in R, which may be of interest for the audience of Geochronology.
Allie Balter-Kennedy, Gordon Bromley, Greg Balco, Holly Thomas, and Margaret S. Jackson
The Cryosphere, 14, 2647–2672, https://doi.org/10.5194/tc-14-2647-2020, https://doi.org/10.5194/tc-14-2647-2020, 2020
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We describe new geologic evidence from Antarctica that demonstrates changes in East Antarctic Ice Sheet (EAIS) extent over the past ~ 15 million years. Our data show that the EAIS was a persistent feature in the Transantarctic Mountains for much of that time, including some (but not all) times when global temperature may have been warmer than today. Overall, our results comprise a long-term record of EAIS change and may provide useful constraints for ice sheet models and sea-level estimates.
Jessica A. Badgeley, Eric J. Steig, Gregory J. Hakim, and Tyler J. Fudge
Clim. Past, 16, 1325–1346, https://doi.org/10.5194/cp-16-1325-2020, https://doi.org/10.5194/cp-16-1325-2020, 2020
Margaret S. Jackson, Meredith A. Kelly, James M. Russell, Alice M. Doughty, Jennifer A. Howley, Susan R. H. Zimmerman, and Bob Nakileza
Clim. Past Discuss., https://doi.org/10.5194/cp-2020-61, https://doi.org/10.5194/cp-2020-61, 2020
Manuscript not accepted for further review
Jacob Downs, Jesse Johnson, Jason Briner, Nicolás Young, Alia Lesnek, and Josh Cuzzone
The Cryosphere, 14, 1121–1137, https://doi.org/10.5194/tc-14-1121-2020, https://doi.org/10.5194/tc-14-1121-2020, 2020
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We use an inverse modeling approach based on the unscented transform (UT) and a new reconstruction of Holocene ice sheet retreat in western central Greenland to infer precipitation changes throughout the Holocene. Our results indicate that warming during the Holocene Thermal Maximum (HTM) was linked to elevated snowfall that slowed retreat despite high temperatures. We also find that the UT provides a computationally inexpensive approach to Bayesian inversion and uncertainty quantification.
Joshua K. Cuzzone, Nicole-Jeanne Schlegel, Mathieu Morlighem, Eric Larour, Jason P. Briner, Helene Seroussi, and Lambert Caron
The Cryosphere, 13, 879–893, https://doi.org/10.5194/tc-13-879-2019, https://doi.org/10.5194/tc-13-879-2019, 2019
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We present ice sheet modeling results of ice retreat over southwestern Greenland during the last 12 000 years, and we also test the impact that model horizontal resolution has on differences in the simulated spatial retreat and its associated rate. Results indicate that model resolution plays a minor role in simulated retreat in areas where bed topography is not complex but plays an important role in areas where bed topography is complex (such as fjords).
Maxwell T. Cunningham, Colin P. Stark, Michael R. Kaplan, and Joerg M. Schaefer
Earth Surf. Dynam., 7, 147–169, https://doi.org/10.5194/esurf-7-147-2019, https://doi.org/10.5194/esurf-7-147-2019, 2019
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Glacial erosion is known to limit the height of midlatitude mountain ranges affected by substantial glaciation during cold periods. Our study examines this phenomenon in the tropics. A new form of hypsometric analysis, along with other evidence, of 10 tropical ranges reveals widespread signs of a perched glacial base level at the ELA. Although glacial influence is moderate to weak in these environments, the evidence suggests that glacial erosion acts to limit the height of tropical ranges.
Joshua K. Cuzzone, Mathieu Morlighem, Eric Larour, Nicole Schlegel, and Helene Seroussi
Geosci. Model Dev., 11, 1683–1694, https://doi.org/10.5194/gmd-11-1683-2018, https://doi.org/10.5194/gmd-11-1683-2018, 2018
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This paper details the implementation of higher-order vertical finite elements in the Ice Sheet System Model (ISSM). When using higher-order vertical finite elements, fewer vertical layers are needed to accurately capture the thermal structure in an ice sheet versus a conventional linear vertical interpolation, therefore greatly improving model runtime speeds, particularly in higher-order stress balance ice sheet models. The implications for paleoclimate ice sheet simulations are discussed.
Johann H. Jungclaus, Edouard Bard, Mélanie Baroni, Pascale Braconnot, Jian Cao, Louise P. Chini, Tania Egorova, Michael Evans, J. Fidel González-Rouco, Hugues Goosse, George C. Hurtt, Fortunat Joos, Jed O. Kaplan, Myriam Khodri, Kees Klein Goldewijk, Natalie Krivova, Allegra N. LeGrande, Stephan J. Lorenz, Jürg Luterbacher, Wenmin Man, Amanda C. Maycock, Malte Meinshausen, Anders Moberg, Raimund Muscheler, Christoph Nehrbass-Ahles, Bette I. Otto-Bliesner, Steven J. Phipps, Julia Pongratz, Eugene Rozanov, Gavin A. Schmidt, Hauke Schmidt, Werner Schmutz, Andrew Schurer, Alexander I. Shapiro, Michael Sigl, Jason E. Smerdon, Sami K. Solanki, Claudia Timmreck, Matthew Toohey, Ilya G. Usoskin, Sebastian Wagner, Chi-Ju Wu, Kok Leng Yeo, Davide Zanchettin, Qiong Zhang, and Eduardo Zorita
Geosci. Model Dev., 10, 4005–4033, https://doi.org/10.5194/gmd-10-4005-2017, https://doi.org/10.5194/gmd-10-4005-2017, 2017
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Climate model simulations covering the last millennium provide context for the evolution of the modern climate and for the expected changes during the coming centuries. They can help identify plausible mechanisms underlying palaeoclimatic reconstructions. Here, we describe the forcing boundary conditions and the experimental protocol for simulations covering the pre-industrial millennium. We describe the PMIP4 past1000 simulations as contributions to CMIP6 and additional sensitivity experiments.
Lise Bonvalot, Thibaut Tuna, Yoann Fagault, Jean-Luc Jaffrezo, Véronique Jacob, Florie Chevrier, and Edouard Bard
Atmos. Chem. Phys., 16, 13753–13772, https://doi.org/10.5194/acp-16-13753-2016, https://doi.org/10.5194/acp-16-13753-2016, 2016
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The contribution of fossil and non-fossil carbon sources to aerosols sampled in the Arve River valley is quantified with 14C measured by AMS with a CO2 gas source. Results show a high contribution of non-fossil carbon sources during winter, which is highly correlated to levoglucosan concentration, showing that almost all of the non-fossil carbon originates from wood combustion. This correlation is also used to separate the contributions of wood burning and biogenic emissions for summer samples.
Joshua M. Maurer, Summer B. Rupper, and Joerg M. Schaefer
The Cryosphere, 10, 2203–2215, https://doi.org/10.5194/tc-10-2203-2016, https://doi.org/10.5194/tc-10-2203-2016, 2016
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Here we utilize declassified spy satellite imagery to quantify ice volume loss of glaciers in the eastern Himalayas over approximately the last three decades. Clean-ice and debris-covered glaciers show similar magnitudes of ice loss, while calving glaciers are contributing a disproportionately large amount to total ice loss. Results highlight important physical processes affecting the ice mass budget and associated water resources in the Himalayas.
Shaun R. Eaves, Andrew N. Mackintosh, Brian M. Anderson, Alice M. Doughty, Dougal B. Townsend, Chris E. Conway, Gisela Winckler, Joerg M. Schaefer, Graham S. Leonard, and Andrew T. Calvert
Clim. Past, 12, 943–960, https://doi.org/10.5194/cp-12-943-2016, https://doi.org/10.5194/cp-12-943-2016, 2016
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Geological evidence for past changes in glacier length provides a useful source of information about pre-historic climate change. We have used glacier modelling to show that air temperature reductions of −5 to −7 °C, relative to present, are required to simulate the glacial extent in the North Island, New Zealand, during the last ice age (approx. 20000 years ago). Our results provide data to assess climate model simulations, with the aim of determining the drivers of past natural climate change.
Michael Sigl, Tyler J. Fudge, Mai Winstrup, Jihong Cole-Dai, David Ferris, Joseph R. McConnell, Ken C. Taylor, Kees C. Welten, Thomas E. Woodruff, Florian Adolphi, Marion Bisiaux, Edward J. Brook, Christo Buizert, Marc W. Caffee, Nelia W. Dunbar, Ross Edwards, Lei Geng, Nels Iverson, Bess Koffman, Lawrence Layman, Olivia J. Maselli, Kenneth McGwire, Raimund Muscheler, Kunihiko Nishiizumi, Daniel R. Pasteris, Rachael H. Rhodes, and Todd A. Sowers
Clim. Past, 12, 769–786, https://doi.org/10.5194/cp-12-769-2016, https://doi.org/10.5194/cp-12-769-2016, 2016
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Here we present a chronology (WD2014) for the upper part (0–2850 m; 31.2 ka BP) of the West Antarctic Ice Sheet (WAIS) Divide ice core, which is based on layer counting of distinctive annual cycles preserved in the elemental, chemical and electrical conductivity records. We validated the chronology by comparing it to independent high-accuracy, absolutely dated chronologies. Given its demonstrated high accuracy, WD2014 can become a reference chronology for the Southern Hemisphere.
M.-P. Ledru, W. U. Reimold, D. Ariztegui, E. Bard, A. P. Crósta, C. Riccomini, and A. O. Sawakuchi
Sci. Dril., 20, 33–39, https://doi.org/10.5194/sd-20-33-2015, https://doi.org/10.5194/sd-20-33-2015, 2015
K. Tachikawa, L. Vidal, M. Cornuault, M. Garcia, A. Pothin, C. Sonzogni, E. Bard, G. Menot, and M. Revel
Clim. Past, 11, 855–867, https://doi.org/10.5194/cp-11-855-2015, https://doi.org/10.5194/cp-11-855-2015, 2015
A. Cauquoin, A. Landais, G. M. Raisbeck, J. Jouzel, L. Bazin, M. Kageyama, J.-Y. Peterschmitt, M. Werner, E. Bard, and ASTER Team
Clim. Past, 11, 355–367, https://doi.org/10.5194/cp-11-355-2015, https://doi.org/10.5194/cp-11-355-2015, 2015
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We present a new 10Be record at EDC between 269 and 355ka. Our 10Be-based accumulation rate is in good agreement with the one associated with the EDC3 timescale except for the warm MIS 9.3 optimum. This suggests that temperature reconstruction from water isotopes may be underestimated by 2.4K for the difference between the MIS 9.3 and present day. The CMIP5-PMIP3 models do not quantitatively reproduce changes in precipitation vs. temperature increase during glacial–interglacial transitions.
B. W. Goodfellow, A. P. Stroeven, D. Fabel, O. Fredin, M.-H. Derron, R. Bintanja, and M. W. Caffee
Earth Surf. Dynam., 2, 383–401, https://doi.org/10.5194/esurf-2-383-2014, https://doi.org/10.5194/esurf-2-383-2014, 2014
T. Barlyaeva, E. Bard, and R. Abarca-del-Rio
Ann. Geophys., 32, 761–771, https://doi.org/10.5194/angeo-32-761-2014, https://doi.org/10.5194/angeo-32-761-2014, 2014
O. Cartapanis, K. Tachikawa, O. E. Romero, and E. Bard
Clim. Past, 10, 405–418, https://doi.org/10.5194/cp-10-405-2014, https://doi.org/10.5194/cp-10-405-2014, 2014
Related subject area
Subject: Ice Dynamics | Archive: Terrestrial Archives | Timescale: Holocene
Spatial variability of marine-terminating ice sheet retreat in the Puget Lowland
Duration and ice thickness of a Late Holocene outlet glacier advance near Narsarsuaq, southern Greenland
Glacier response to Holocene warmth inferred from in situ 10Be and 14C bedrock analyses in Steingletscher's forefield (central Swiss Alps)
Glacial history of Inglefield Land, north Greenland from combined in situ 10Be and 14C exposure dating
Wet avalanches: long-term evolution in the Western Alps under climate and human forcing
Marion A. McKenzie, Lauren E. Miller, Allison P. Lepp, and Regina DeWitt
Clim. Past, 20, 891–908, https://doi.org/10.5194/cp-20-891-2024, https://doi.org/10.5194/cp-20-891-2024, 2024
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Records of the interaction between land and glacial ice movement in the Puget Lowland of Washington State are used to interpret that solid Earth movement provided stability to this marine-terminating glacial ice for at least 500 years. These results are significant because this landscape is similar to parts of the Greenland Ice Sheet and the Antarctic Peninsula, indicating that the interactions seen in this area are applicable to modern glaciated regions.
Peter J. K. Puleo and Yarrow Axford
Clim. Past, 19, 1777–1791, https://doi.org/10.5194/cp-19-1777-2023, https://doi.org/10.5194/cp-19-1777-2023, 2023
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We used two lake sediment records at different elevations and landscape evidence to find that a southern Greenland outlet glacier advanced ~ 3700 years ago and then retreated ~ 1600 years ago. This retreat is unlike other nearby outlet glaciers, possibly because of the complex local ice structure or greater sensitivity to snowfall. We also find that the advanced ice surface had an elevation of ~ 670 m a.s.l. (~ 250 m higher than today) from ~ 3700 to 1600 years ago.
Irene Schimmelpfennig, Joerg M. Schaefer, Jennifer Lamp, Vincent Godard, Roseanne Schwartz, Edouard Bard, Thibaut Tuna, Naki Akçar, Christian Schlüchter, Susan Zimmerman, and ASTER Team
Clim. Past, 18, 23–44, https://doi.org/10.5194/cp-18-23-2022, https://doi.org/10.5194/cp-18-23-2022, 2022
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Small mountain glaciers advance and recede as a response to summer temperature changes. Dating of glacial landforms with cosmogenic nuclides allowed us to reconstruct the advance and retreat history of an Alpine glacier throughout the past ~ 11 000 years, the Holocene. The results contribute knowledge to the debate of Holocene climate evolution, indicating that during most of this warm period, summer temperatures were similar to or warmer than in modern times.
Anne Sofie Søndergaard, Nicolaj Krog Larsen, Olivia Steinemann, Jesper Olsen, Svend Funder, David Lundbek Egholm, and Kurt Henrik Kjær
Clim. Past, 16, 1999–2015, https://doi.org/10.5194/cp-16-1999-2020, https://doi.org/10.5194/cp-16-1999-2020, 2020
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We present new results that show how the north Greenland Ice Sheet responded to climate changes over the last 11 700 years. We find that the ice sheet was very sensitive to past climate changes. Combining our findings with recently published studies reveals distinct differences in sensitivity to past climate changes between northwest and north Greenland. This highlights the sensitivity to past and possible future climate changes of two of the most vulnerable areas of the Greenland Ice Sheet.
Laurent Fouinat, Pierre Sabatier, Fernand David, Xavier Montet, Philippe Schoeneich, Eric Chaumillon, Jérôme Poulenard, and Fabien Arnaud
Clim. Past, 14, 1299–1313, https://doi.org/10.5194/cp-14-1299-2018, https://doi.org/10.5194/cp-14-1299-2018, 2018
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In the context of a warming climate, mountain environments are especially vulnerable to a change in the risk pattern. Our study focuses on the past evolution of wet avalanches, likely triggered by warmer temperatures destabilizing the snow cover. In the last 3300 years we observed an increase of wet avalanche occurrence related to human activities, intensifying pressure on forest cover, as well as favorable climate conditions such as warmer temperatures coinciding with retreating glacier phases.
Cited articles
Argento, D. C., Reedy, R. C., and Stone, J. O.: Modeling the earth's cosmic
radiation, Nucl. Instrum. Meth. B., 294, 464–469, https://doi.org/10.1016/j.nimb.2012.05.022, 2013.
Aschwanden, A., Bueler, E., Khroulev, C., and Blatter, H.: An enthalpy
formulation for glaciers and ice sheets, J. Glaciol., 58, 441–457, https://doi.org/10.3189/2012JoG11J088, 2012.
Badgeley, J. A., Steig, E. J., Hakim, G. J., and Fudge, T. J.: Greenland temperature and precipitation over the last 20 000 years using data assimilation, Clim. Past, 16, 1325–1346, https://doi.org/10.5194/cp-16-1325-2020, 2020.
Balco, G.: Production rate calculations for cosmic-ray-muon-produced
10Be and 26Al benchmarked against geological calibration data, Quat. Geochronol., 39, 150–173,
https://doi.org/10.1016/j.quageo.2017.02.001, 2017.
Balco, G.: ICE-D:Greenland, available at: http://greenland.ice-d.org/pub/26, last access: 27 August 2020.
Balco, G. and Rovey II, C. W.: An isochron method for cosmogenic-nuclide
dating of buried soils and sediments, Am. J. Sci., 308, 1083–1114, https://doi.org/10.2475/10.2008.02, 2008.
Balco, G., Stone, J., Lifton, N., and Dunai, T. J.: A complete and easily
accessible means of calculating surface exposure ages and erosion rates from 10Be and 26Al measurements, Quat.
Geochronol., 3, 174–195, https://doi.org/10.1016/j.quageo.2007.12.001, 2008.
Bard, E., Tuna, T., Fagault, Y., Bonvalot, L., Wacker, L., Fahrni, S., and
Synal, H.-A.: AixMICADAS, the accelerator mass spectrometer dedicated to 14C recently installed in Aix-en-Provence,
France, Nucl. Instrum. Meth. B, 361, 80–86,
https://doi.org/10.1016/j.nimb.2015.01.075, 2015.
Benn, D. I. and Åström, J. A.: Calving glaciers and ice shelves,
Adv. Phys. X, 3, 1513819, https://doi.org/10.1080/23746149.2018.1513819,
2018.
Bennike, O. and Björck, S.: Chronology of the last
recession of the Greenland ice sheet, J. Quaternary Sci., 17, 211–219, https://doi.org/10.1002/jqs.670, 2002.
Bierman, P. R., Marsella, K. A., Patterson, C., Thompson Davis, P., and
Caffee, M.: Mid-Pleistocene cosmogenic minimum-age limits for pre-Wisconsin glacial surfaces in southwestern Minnesota and
southern Baffin Island: a multiple nuclide approach, Geomorphology, 27, 25–39,
https://doi.org/10.1016/S0169-555X(98)00088-9, 1999.
Bierman, P. R., Shakun, J. D., Corbett, L. B., Zimmerman, S. R., and Rood, D. H.:
A persistent and dynamic East Greenland Ice Sheet over the past 7.5 million years, Nature, 540, 256–260,
https://doi.org/10.1038/nature20147, 2016.
Blatter, H.: Velocity and stress-fields in grounded glaciers: A simple
algorithm for including deviatoric stress gradients, J. Glaciol., 41, 333–344, https://doi.org/10.3189/S002214300001621X, 1995.
Briner, J. P., Stewart, H. A. M., Young, N. E., Phillips, W., and Losee, S.:
Using proglacial-threshold lakes to constrain fluctuations of the Jakobshavn Isbræ ice margin, western Greenland,
during the Holocene, Quaternary Sci. Rev., 29, 3861–3874,
https://doi.org/10.1016/j.quascirev.2010.09.005, 2010.
Briner, J. P., Lifton, N. A., Miller, G. H., Refsnider, K. Anderson, R., and
Finkel, R. C.: Using in situ cosmogenic 10Be, 14C, and 26Al, to decipher the history of polythermal ice sheets on Baffin
Island, Arctic Canada, Quat. Geochronol., 19, 4–13,
https://doi.org/10.1016/j.quageo.2012.11.005, 2014.
Briner, J. P., Cuzzone, J. K., Badgeley, J. A., Young, N. E., Steig, E. J.,
Morlighem, M., Schlegel, N.-J., Hakim, G., Schaefer, J. Johnson, J. V., Lesnek, A. L., Thomas, E. K., Allan, E., Bennike, O., Cluett, A. A., Csatho, B., de Vernal, A., Downs, J., Larour, E., and Nowicki, S.: Rate of mass loss from the Greenland Ice
Sheet will exceed Holocene values this century, Nature, 6, 70–74,
https://doi.org/10.1038/s41586-020-2742-6, 2020.
Chmeleff, J., von Blanckenburg, F., Kossert, K., and Jakob, D.:
Determination of the 10Be half-life by multicollector icp-ms and
liquid scintillation counting, Nucl. Instrum. Meth. B, 268, 192–199, https://doi.org/10.1016/j.nimb.2009.09.012, 2010.
Colville, E. J., Carlson, A. E., Beard, B. L., Hatfield, R. G., Stoner, J. S.,
Reyes, A. V., and Ullman, D. J.: Sr-Nd-Pb isotope evidence for ice-sheet presence on southern Greenland during the Last
Interglacial, Science, 333, 620–623, https://doi.org/10.1126/science.1204673, 2011.
Corbett, L. B., Bierman, P. R., Rood, D. H., Caffee, M. W., Lifton, N. A., and
Woodruff, T. E.: Cosmogenic
Cronauer, S. L., Briner, J. P., Kelley, S. E., Zimmerman, S. R. H., and
Morlighem, M.: 10Be dating reveals early-middle Holocene age of the Drygalski Moraines in central West Greenland, Quaternary Sci. Rev.,
147, 59–68, https://doi.org/10.1016/j.quascirev.2015.08.034, 2015.
Crump, S. E., Young, N. E., Miller, G. H., Pendleton, S. L., Tulenko, J. P.,
Anderson, R. S., and Briner, J. P.: Glacier expansion on Baffin Island during early Holocene cold reversals, Quaternary Sci. Rev., 241,
106419, https://doi.org/10.1016/j.quascirev.2020.106419, 2020.
Cuzzone, J. K., Morlighem, M., Larour, E., Schlegel, N., and Seroussi, H.: Implementation of higher-order vertical finite elements in ISSM v4.13 for improved ice sheet flow modeling over paleoclimate timescales, Geosci. Model Dev., 11, 1683–1694, https://doi.org/10.5194/gmd-11-1683-2018, 2018.
Cuzzone, J. K., Schlegel, N.-J., Morlighem, M., Larour, E., Briner, J. P., Seroussi, H., and Caron, L.: The impact of model resolution on the simulated Holocene retreat of the southwestern Greenland ice sheet using the Ice Sheet System Model (ISSM), The Cryosphere, 13, 879–893, https://doi.org/10.5194/tc-13-879-2019, 2019.
de Vernal, A. and Hillaire-Marcel, C.: Natural variability of Greenland
climate, vegetation, and ice volume during the past million years, Science, 320, 1622–1625, https://doi.org/10.1126/science.1153929, 2018.
Downs, J., Johnson, J., Briner, J., Young, N., Lesnek, A., and Cuzzone, J.: Western Greenland ice sheet retreat history reveals elevated precipitation during the Holocene thermal maximum, The Cryosphere, 14, 1121–1137, https://doi.org/10.5194/tc-14-1121-2020, 2020.
Dutton, A., Carlson, A. E., Long, A. J., Milne, G. A., Clark, P. U.,
DeConto, R., Horton, B. P., Rahmstorf, S., and Raymo, M. E.: Sea-level rise due to polar ice-sheet mass loss during past warm periods,
Science, 349, aaa4019, https://doi.org/10.1126/science.aaa4019, 2015.
Fabel, D., Stroeven, A. P., Harbor, J., Kleman, J., Elmore, D., and Fink, D.:
Landscape preservation under Fennoscandian ice sheers determined from in situ produced 10Be and 26Al, Earth. Planet.
Sc. Lett., 201, 397–406, https://doi.org/10.1016/S0012-821X(02)00714-8, 2002.
Funder, S., Kjeldsen, K. K., Kjær, K., and Ó Cofaigh, C.: The
Greenland Ice Sheet during the past 300,000 years: a review, in: Developments in Quaternary
Sciences, edited by: Ehlers, J., Gibbard, P. L., and Hughes, P. D., Elsevier, Amsterdam, the Netherlands, 699–713, 2011.
Gjermundsen, E. F., Briner, J. P., Akçar, N., Foros, J., Kubik, P. W.,
Salvigsen, O., and Hormes, A.: Minimal erosion of Arctic alpine topography during late Quaternary glaciation, Nat. Geosci., 8, 789–792, https://doi.org/10.1038/ngeo2524, 2015.
Goehring, B. M., Schaefer, J. M., Schluechter, C., Lifton, N. A., Finkel, R. C.,
Jull, A. J. T., Akçar, N., and Alley, R. B.: The Rhone Glacier was smaller than today for most of the Holocene, Geology, 39,
679–682, https://doi.org/10.1130/G32145.1, 2011.
Grant, K. M., Rohling, E. J., Bronk Ramsey, C., Cheng, H., Edwards, R. L.,
Florindo, F., Heslop, D., Marra, F., Roberts, A. P., Tamisiea, M. E., and Williams, F.: Sea-level variability over five glacial
cycles, Nat. Commun., 5, 5076, https://doi.org/10.1038/ncomms6076, 2014.
Håkansson, L., Briner, J. P., Andresen, C. S., Thomas, E. K., and Bennike, O.: Slow retreat of a land-based sector of the West Greenland Ice Sheet during the Holocene Thermal Maximum: evidence from
threshold lakes at Paakitsoq, Quaternary Sci. Rev., 98, 74–83,
https://doi.org/10.1016/j.quascirev.2014.05.016, 2014.
Hallet, B., Hunter, L., and Bogen, J.: Rates of erosion and sediment
evacuation by glaciers: A review of field data and their implications, Global Planet. Change., 12, 213–235,
https://doi.org/10.1016/0921-8181(95)00021-6, 1996.
Hatfield, R. G., Reyes, A. V., Stoner, J. S., Carlson, A. E., Beard, B. L.,
Winsor, K., and Welke, B.: Interglacial responses of the southern Greenland ice sheet over the last 430,000 years determined using
particle-size specific magnetic and isotopic tracers, Earth. Planet. Sc.
Lett., 454, 225–236, https://doi.org/10.1016/j.epsl.2016.09.014, 2016.
He, F., Shakun, J. D., Clark, P. U., Carlson, A. E., Liu, Z., Otto-Bliesner, B. L., and Kutzbach, J. E.: Northern Hemisphere forcing of Southern Hemisphere climate during the last deglaciation, Nature, 494,
81–85, https://doi.org/10.1038/nature11822, 2013.
Heaton, T. J., Köhler, P., Butzin, M., Bard, E., Reimer, R. W.,
Austin, W. E. N., Bronk Ramsey, C., Grootes, P. M., Hughen, K. A., Kromer, B.,
Reimer, P. J., Adkins, J., Burke, A., Cook, M. S., Olsen, J., and Skinner, L. C.: Marine20-The marine radiocarbon age calibration curve
(0–55,000 cal BP), Radiocarbon, 62, 779–820, https://doi.org/10.1017/RDC.2020.68,
2020.
Henriksen, N., Higgins, A. K., Kalsbeek, F., and Pulvertaft, T. C. R.:
Crystalline rocks older than 1600 Ma: The Greenland Precambrian shield, in: Greenland from Archaean to Quaternary. Descriptive text to the Geological map of Greenland,
1:2,500,000, 2nd. edn., Vol. 185, edited by: Henriksen, N., Higgins, A. K.,
Kalsbeek, F., and Pulvertaft, T. C. R., Geological Survey of Denmark and
Greenland Bulletin 18, Geological Survey of Denmark and Greenland, Copenhagen, Denmark, 12–24, 2000.
Hippe, K. and Lifton, N. A.: Calculating isotope ratios and nuclide
concentrations for in situ cosmogenic 14C analyses, Radiocarbon, 56, 1167–1174, https://doi.org/10.2458/56.17917, 2014.
Hogan, K. A., Ó Cofaigh, C., Jennings, A. E., Dowdeswell, J. A., and
Hiemstra, J. F.: Deglaciation of a major paleo-ice stream in Disko Trough, West Greenland, Quaternary Sci. Rev., 147, 5–26,
https://doi.org/10.1016/j.quascirev.2016.10.018, 2016.
Janssens, I. and Huybrechts, P.: The treatment of meltwater retention in
mass-balance parameterizations of the Greenland ice sheet, Ann. Glaciol., 31, 133–140, https://doi.org/10.3189/172756400781819941, 2000.
Jennings, A. E., Andrews, J. T., Ó Cofaigh, C., St. Onge, G., Sheldon, C.,
Belt, S. T., Cabedo-Sanz, P., and Hillaire-Marcel, C.: Ocean forcing of Ice Sheet retreat in central west Greenland from LGM to the
early Holocene, Earth. Planet. Sc. Lett. 472, 1–13, https://doi.org/10.1016/j.epsl.2017.05.007, 2017.
Kaplan, M. R., Wolfe, A. P., and Miller, G. H.: Holocene environmental
variability in southern Greenland inferred from lake sediments, Quaternary Res., 58, 149–159, https://doi.org/10.1006/qres.2002.2352, 2002.
Kelley, S. E., Briner, J. P., Young, N. E., Babonis, G. S., and Csatho, B.:
Maximum late Holocene extent of the western Greenland Ice Sheet during the 20th century, Quaternary Sci. Rev., 56, 89–98,
https://doi.org/10.1016/j.quascirev.2012.09.016, 2012.
Kelley, S. E., Briner, J. P., and Young, N. E.: Rapid ice retreat in Disko Bugt
supported by 10Be dating of the last recession of the western Greenland Ice Sheet, Quaternary Sci. Rev., 82, 13–22,
https://doi.org/10.1016/j.quascirev.2013.09.018, 2013.
Knutz, P. C., Newton, A. M. W., Hopper, J. R., Huuse, M., Gregersen, U.,
Sheldon, E., and Dybkjæer, K.: Eleven phases of Greenland Ice Sheet shelf-edge advance over the past 2.7 million years, Nat.
Geosci., 12, 361–368, https://doi.org/10.1038/s41561-019-0340-8, 2019.
Kobashi, T., Menviel, L., Jeltsch-Thömmes, A., Vinther, B. M., Box, J. E.,
Muscheler, R., Nakaegawa, T., Pfister, P. L., Döring, M., Leuenberger, M., Wanner, H., and Ohmura, A.: Volcanic influence on
centennial to millennial Holocene Greenland temperature change, Sci. Rep.-UK,
7, 1441, https://doi.org/10.1038/s41598-017-01451-7, 2017.
Lal, D.: Cosmic ray labeling of erosion surfaces: in situ nuclide production rates
and erosion models, Earth Planet. Sc. Lett., 104, 424–429, https://doi.org/10.1016/0012-821X(91)90220-C, 1991.
Lamp, J. L., Young, N. E., Koffman, T., Schimmelpfennig, I., Tuna, T.,
Bard, E., and Schaefer, J. M.: Update on the cosmogenic in situ
14C laboratory at the Lamont-Doherty Earth Observatory,
Nucl. Instrum. Meth. B, 456, 157–162, https://doi.org/10.1016/j.nimb.2019.05.064,
2019.
Larour, E., Seroussi, H., Morlighem, M., and Rignot, E.: Continental scale,
high order, high spatial resolution, ice sheet modeling using the Ice Sheet System Model (ISSM), J. Geophys. Res.-Earth, 117, F01022, https://doi.org/10.1029/2011JF002140, 2012.
Larsen, N. K., Funder, S., Kjær, K. H., Kjeldsen, K. K., Knudsen, M. F., and
Linge, H.: Rapid early Holocene ice retreat in West Greenland, Quaternary Sci. Rev., 92, 310–323, https://doi.org/10.1016/j.quascirev.2013.05.027,
2014.
Larsen, N. K., Kjær, K. H., Lecavalier, B., Bjørk, A. A., Colding, S.,
Huybrechts, P., Jakobsen, K. E., Kjeldsen, K. K., Knudsen, K. L.,
Odgaard, B. V., and Olsen, J.: The response of the southern Greenland ice
sheet to the Holocene thermal maximum, Geology, 43, 291–294,
https://doi.org/10.1130/G36476.1, 2015.
Larsen, N. K., Levy, L. B., Carlson, A. E., Buizert, C., Olsen, J., Strunk, A.,
Bjørk, A. A., and Skov, D. S.: Instability of the northeast Greenland ice stream over the last 45 000 years, Nat. Commun., 9, 1872,
https://doi.org/10.1038/s41467-018-04312-7, 2018.
Lea, J. M., Mair, D. W. F., Nick, F. M., Rea, B. R., Weidick, A., Kjær, K. H.,
Morlighem, M., van As, D., and Schofield, J. E.: Terminus-driven retreat of a major southwest Greenland tidewater glacier
during the early 19th century: insights from glacier reconstructions and numerical modelling, J. Glaciol., 60, 333–344,
https://doi.org/10.3189/2014JoG13J163, 2014.
Lecavalier, B. S., Milne, G. A., Simpson, M. J. R., Wake, L., Huybrechts, P.,
Tarasov, L., Kjeldsen, K. K., Funder, S., Long, A. J., Woodroffe, S., Dyke, A. S., and Larsen, N. K.: A model of Greenland ice sheet
deglaciation constrained by observations of relative sea level and ice extent, Quaternary Sci. Rev., 102,
54–84, https://doi.org/10.1016/j.quascirev.2014.07.018, 2014.
Lesnek, A. J. and Briner, J. P.: Response of a land-terminating sector of the
western Greenland Ice Sheet to early Holocene climate change: Evidence from 10Be dating in the Søndre Isortoq
region, Quaternary Sci. Rev., 180, 145–156, https://doi.org/10.1016/j.quascirev.2017.11.028,
2018.
Lesnek, A. J., Briner, J. P., Young, N. E., and Cuzzone, J. K.: Maximum
southwest Greenland Ice Sheet recession in the early Holocene, Geophys. Res. Lett., 47, e2019GL083164, https://doi.org/10.1029/2019GL083164,
2020.
Levy, L. B., Larsen, N. K., Davidson, T. A., Strunk, A., Olsen, J., and
Jeppesen, E.: Contrasting evidence of Holocene ice margin retreat, south-western Greenland, J. Quaternary Sci., 32, 604–616,
https://doi.org/10.1002/jqs.2957, 2017.
Liu, Z., Otto-Bliesner, B. L., He, F., Brady, E. C., Tomas, R., Clark, P. U.,
Carlson, A. E., Lynch-Stieglitz, J., Curry, W., Brook, E., Erickson, D., Jacob, R., Kutzbach, J., and Cheng, J.: Transient
Simulation of Last Deglaciation with a New Mechanism for Bølling-Allerød Warming, Science, 325, 310–314,
https://doi.org/10.1126/science.1171041, 2009.
Long, A. J., Woodroffe, S. A., Roberts, D. H., and Dawson, S.: Isolation
basins, sea-level changes and the Holocene history of the Greenland Ice Sheet, Quaternary Sci. Rev., 30, 3748–3768,
https://doi.org/10.1016/j.quascirev.2011.10.013, 2011.
Miller, G. H., Briner, J. P., Lifton, N. A., and Finkel, R. C.: Limited ice-sheet
erosion and complex exposure histories derived from in situ cosmogenic 10Be, 26Al, 14C on Baffin Island, Arctic Canada,
Quat. Geochronol., 1, 74–85, https://doi.org/10.1016/j.quageo.2006.06.011, 2006.
Morlighem, M., Williams, C. N., Rignot, E., An, L., Arndt, J. E., Bamber, J.,
Catania, G., Chauché, N., Dowdeswell, J. A., Dorschel, B., Fenty, I., Hogan, K. Howat, I., Hubbard, A., Jakobsson, M.,
Jordan, T. M., Kjeldsen, K. K., Millan, R., Mayer, L., Mouginot, J., Noël, B. P. Y., O'Cofaigh, C., Palmer, S.,
Rysgaard, S., Seroussi, H., Siegert, M. J., Slabon, P., Straneo, F., van den Broeke, M. R., Weinrebe, W., Wood, M., and
Zinglersen, K. B.: BedMachine v3: Complete bed topography and ocean bathymetry mapping of Greenland from multibeam echo
sounding combined with mass conservation, Geophys. Res. Lett., 44, 11,051–11,061,
https://doi.org/10.1002/2017GL074954, 2017.
NEEM Community Members: Eemian interglacial reconstructed from a Greenland
folded ice core, Nature, 493, 489–494, https://doi.org/10.1038/nature11789, 2013.
North Greenland Ice Core Project members (NGRIP): High-resolution record of
Northern Hemisphere climate extending into the last interglacial period,
Nature, 431, 147–151, https://doi.org/10.1038/nature02805, 2004.
Nishiizumi, K.: Preparation of 26Al AMS standards,
Nucl. Instrum. Meth. B., 223–224, 388–392, https://doi.org/10.1016/j.nimb.2004.04.075, 2004.
Nishiizumi, K., Imamura, M., Caffee, M., Southon, J., Finkel, R., and
McAninch, J.: Absolute calibration of 10Be AMS standards, Nucl. Instrum. Meth. B, 258, 403–413,
https://doi.org/10.1016/j.nimb.2007.01.297, 2007.
Ó Cofaigh, C., Dowdeswell, J. A., Jennings, A. E., Hogan, K. A.,
Kilfeather, A., Hiemstra, J. F., Noormets, R., Evans, J., McCarthy, D. J., Andrews, J. T., and Moros, M.: An extensive and dynamic ice
sheet on the West Greenland shelf during the last glacial cycle, Geology, 41, 219–222, https://doi.org/10.1130/G33759.1,
2013.
Pattyn, F.: A new three-dimensional higher-order thermomechanical ice sheet
model: Basic sensitivity, ice stream development, and ice flow across subglacial lakes, J. Geophys. Res., 108,
2382, https://doi.org/10.1029/2002JB002329, 2003.
Pearce, D. M., Mair, D. W. F., Rea, B. R., Lean, J. M., Schofield, E., Kamenos, N., and Schoenrock, K.: The glacial geomorphology of upper Godthåbsfjord (Nuup Kangerlua) in southwest
Greenland, J. Maps, 14, 45–55, https://doi.org/10.1080/17445647.2017.1422447, 2018.
Pendleton, S. L., Miller, G. H., Lifton, N., Lehman, S. J., Southon, J., Crump, S. E., and Anderson, R. S.: Rapidly receding Arctic Canada glaciers revealing landscapes continuously ice-covered for more than
40,000 years, Nat. Commun., 10, 445, https://doi.org/10.1038/s41467-019-08307-w, 2019.
Reimer, P. J., Austin, W. E. N., Bard, E., Bayliss, A., Blackwell, P. G., Bronk
Ramsey, C., Cheng, H., Edwards, R. L., Friedrich, M., Grootes, P. M., Guilderson, T. P., Hajdas, I., Heaton, T. J., Hogg, A. G.,
Hughen, K. A., Kromer, B., Manning, S. W., Muscheler, R., Palmer, J. G., Pearson, C., van der Plicht, J., Reimer, R. W.,
Richards, D. A., Scott, E. M., Southon, J. R., Turney, C. S. M., Wacker, L., Adolphi, F., Büntgen, U., Capano, M.,
Fahrni, S. M., Fogtmann-Schulz, A., Friedrick, R., Köhler, P., Kudsk, S.,
Miyake, F., Olsen, J., Reinig, F., Sakamoto, M., Sookdeo, A., and Talamo, S.: INTCAL20 Northern Hemisphere radiocarbon age calibration curve (0–55 CAL kBP),
Radiocarbon, 62, 725–757, https://doi.org/10.1017/RDC.2020.41, 2020.
Reyes, A. V., Carlson, A. E., Beard, B. L., Hatfield, R. G., Stoner, J. S.,
Winsor, K., Welke, B., and Ullman, D. J.: South Greenland ice-sheet collapse during Marine Isotope Stage 11, Nature, 510, 525–528,
https://doi.org/10.1038/nature13456, 2014.
Schaefer, J. M., Denton, G. H., Kaplan, M., Putnam, A., Finkel, R. C., Barrell, D. J. A., Andersen, B. G., Schwartz, R., Mackintosh, A., Chinn, T., and Schlüchter, C.: High-frequency Holocene
glaciers in New Zealand differ from the Northern signature, Science, 324, 622–625, https://doi.org/10.1126/science.1169312,
2009.
Schaefer, J. M., Finkel, R. C., Balco, G., Alley, R. B., Caffee, M. W., Briner, J. P., Young, N. E., Gow, A. J., and Schwartz, R.: Greenland was nearly ice-free for extended periods during the Pleistocene,
Nature, 540, 252–255, https://doi.org/10.1038/nature20146, 2016.
Seidenkrantz, M-.S., Kuijpers, A., Olsen, J., Pearce, C., Lindblom, S.,
Ploug, J., Przbyło, P., and Snowball, I.: Southwest Greenland shelf glaciation during MIS 4 more extensive than during the Last
Glacial Maximum, Sci. Rep.-UK, 9, 15617, https://doi.org/10.1038/s41598-019-51983-3, 2019.
Seroussi, H. and Morlighem, M.: Representation of basal melting at the
grounding line in ice flow models, The Cryosphere, 12, 3085–3096,
https://doi.org/10.5194/tc-12-3085-2018, 2018.
Seroussi, H., Morlighem, M., Rignot, E., Khazendar, A., Larour, E., and
Mouginot, J.: Dependence of greenland ice sheet projections on its thermal regime, J. Glaciol., 59, 218,
https://doi.org/10.3189/2013JoG13J054, 2013.
Shapiro, N. M. and Ritzwoller, M. H.: Inferring surface heat flux
distribution guided by a global seismic model: particular application to Antarctica, Earth Planet. Sc. Lett., 223, 213–224,
https://doi.org/10.1016/j.epsl.2004.04.011, 2004.
Siddall, M., Rohling, E. J., Almogi-Labin, A., Hemleben, Ch., Meischner, D.,
Schmelzer, I., and Smeed, D. A.: Sea-level fluctuations during the last
glacial cycle, Nature, 423, 853–858, https://doi.org/10.1038/nature01690,
2003.
Simpson, M. J. R., Milne, G. A., Huybrechts, P., and Long, A. J.: Calibrating a
glaciological model of the Greenland ice sheet from the Last Glacial Maximum to present-day using field observations of
relative sea level and ice extent, Quaternary Sci. Rev., 28, 1631–1657,
https://doi.org/10.1016/j.quascirev.2009.03.004, 2009.
Spector, P., Stone, J., Pollard, D., Hillebrand, T., Lewis, C., and Gombiner, J.: West Antarctic sites for subglacial drilling to test for past ice-sheet collapse, The Cryosphere, 12, 2741–2757, https://doi.org/10.5194/tc-12-2741-2018, 2018.
Stirling, C. H., Esat, T. M., Lambeck, K., and McCulloch, M. T.: Timing and
duration of the Last Interglacial: Evidence for a restricted interval of widespread coral reef growth, Earth Planet. Sc.
Lett., 160, 745–762, https://doi.org/10.1016/S0012-821X(98)00125-3, 1998.
Stone, J. O.: Air pressure and cosmogenic isotope production, J. Geophys.
Res., 105, 23753–23759, https://doi.org/10.1029/2000JB900181, 2000.
Stuiver, M., Reimer, P. J., and Reimer, R. W.: CALIB 8.2 (WWW program),
available at: http://calib.org, last access: 13 August 2020.
Tarasov, L. and Peltier, W. R.: Impact of thermomechanical ice sheet
coupling on a model of the 100 kyr ice age cycle. J. Geophys. Res.-Atmos., 104, 9517–9545, https://doi.org/10.1029/1998JD200120, 1999.
Thomas, E. K., Castañeda, I. S., McKay, N. P., Briner, J. P., Salacup, J. M.,
Nguyen, K. Q., and Schweinsberg, A. D.: A wetter Arctic coincident with hemispheric warming 8000 years ago, Geophys. Res.
Lett., 45, 10,637–10, 647, https://doi.org/10.1029/2018GL079517, 2018.
Tuna, T., Fagault, Y., Bonvalot, L., Capano, M., and Bard, W.: Development of
small CO2 gas measurements with AixMICADAS, Nucl. Instrum. Meth. B, 437, 93–97,
https://doi.org/10.1016/j.nimb.2018.09.012, 2018.
Weidick, A.: Quaternary Map of Greenland, 1 : 500 000, Frederikshåbs
Isblink – Søndre Strømfjord, Geological Survey of Greenland, Copenhagen, Denmark, 1974.
Weidick, A., Oerter, H., Reeh, N., Thomsen, H. H., and Thorning, L.: The
recession of the Inland Ice margin during the Holocene climatic optimum in the Jakobshavn Isfjord area of West Greenland,
Palaeogeogr. Palaeocl. 82, 389–399, https://doi.org/10.1016/S0031-0182(12)80010-1, 1990.
Weidick, A., Bennike, O., Citterio, M., and Nørgaard-Pedersen, N.:
Neoglacial and historical glacier changes around Kangersuneq fjord in southern West Greenland, Geol. Surv. Den. Greenl.,
27, 1–68, https://doi.org/10.34194/geusb.v27.4694, 2012.
Wolfe, A. P., Miller, G. H., Olsen, C. A., Forman, S. L., Doran, P. T., and
Holmgren, S. U.: Geochronology of high latitude lake sediments, in: Long-Term
Environmental Change in Arctic and Antarctic Lakes. Developments in
Paleoenvironmental Research, vol. 8, edited by: Pienitz, R., Douglas, M. S. V., and Smol, J. P., Springer,
Dordrecht, 19–52, 2004.
Young, N. E. and Briner, J. P.: Holocene evolution of the western Greenland
Ice Sheet: Assessing geophysical ice-sheet models with geological reconstructions of ice-margin change, Quaternary Sci. Rev., 114,
1–17, https://doi.org/10.1016/j.quascirev.2015.01.018, 2015.
Young, N. E., Briner, J. P., Stewart, H. A. M., Axford, Y., Csatho, B., Rood, D. H., and Finkel, R. C.: Response of Jakobshavn Isbræ, Greenland, to Holocene climate change, Geology, 39, 131–134,
https://doi.org/10.1130/G31399.1, 2011a.
Young, N. E., Briner, J. P., Axford, Y., Csatho, B., Babonis, G. S., Rood, D. H., and Finkel, R. C.: Response of a marine-terminating Greenland outlet glacier to abrupt cooling 8200 and 9300 years
ago, Geophys. Res. Lett., 38, L24701, https://doi.org/10.1029/2011GL049639, 2011b.
Young, N. E., Schaefer, J. M., Briner, J. P., and Goehring, B. M.: A 10Be
production rate calibration for the Arctic, J. Quaternary Sci., 28, 515–526, https://doi.org/10.1002/jqs.2642, 2013a.
Young, N. E., Briner, J. P., Rood, D. H., Finkel, R. C., Corbett, L. B., and
Bierman, P. R.: Age of the Fjord Stade moraines in the Disko Bugt region, western Greenland, and the 9.3 and 8.2 ka cooling events,
Quaternary Sci. Rev., 60, 76–90, https://doi.org/10.1016/j.quascirev.2012.09.028, 2013b.
Young, N. E., Schaefer, J. M., Goehring, B., Lifton, N., Schimmelpfennig, I.,
and Briner, J. P.: West Greenland and global in situ 14C production-rate calibrations, J. Quaternary Sci., 29, 401–406,
https://doi.org/10.1002/jqs.2717, 2014.
Young, N. E., Briner, J. P., Maurer, J., and Schaefer, J. M.: 10Be
measurements in bedrock constrain erosion beneath the Greenland Ice Sheet margin, Geophys. Res. Lett., 43, 1–12,
https://doi.org/10.1002/2016GL070258, 2016.
Young, N. E., Briner, J. P., Miller, G. H., Lesnek, A. J., Crump, S. E., Thomas, E. K. Pendleton, S. L., Cuzzone, J., Lamp, J., Zimmerman, S., Caffee, M., and Schaefer, J. M.: Deglaciation of the Greenland
and Laurentide ice sheets interrupted by glacier advance during abrupt
coolings, Quaternary Sci. Rev., 229, 106091, https://doi.org/10.1016/j.quascirev.2019.106091, 2020a.
Young, N. E., Briner, J. P., Miller, G. H., Lesnek, A. J., Crump, S. E., Thomas, E. K. Pendleton, S. L., Cuzzone, J., Lamp, J., Zimmerman, S., Caffee, M., and Schaefer, J. M.: Reply to Carlson (2020)
comment on “Deglaciation of the Greenland and Laurentide ice sheets
interrupted by glacier advance during abrupt coolings”, Quaternary Sci. Rev.,
240, 106329, https://doi.org/10.1016/j.quascirev.2020.106329, 2020b.
Short summary
Retreat of the Greenland Ice Sheet (GrIS) margin is exposing a bedrock landscape that holds clues regarding the timing and extent of past ice-sheet minima. We present cosmogenic nuclide measurements from recently deglaciated bedrock surfaces (the last few decades), combined with a refined chronology of southwestern Greenland deglaciation and model simulations of GrIS change. Results suggest that inland retreat of the southwestern GrIS margin was likely minimal in the middle to late Holocene.
Retreat of the Greenland Ice Sheet (GrIS) margin is exposing a bedrock landscape that holds...
