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2. The first Miocene fossils from coastal woodlands in the southern East African Rift

Author

Bobe, René, Aldeias, Vera, Alemseged, Zeresenay, Anemone, Robert L., Archer, Will, Aumaître, Georges, Bamford, Marion K., Biro, Dora, Bourlès, Didier L., Doyle Boyd, Melissa, Braun, David R., Capelli, Cristian, d’Oliveira Coelho, João, Habermann, Jörg M., Head, Jason J., Keddadouche, Karim, Kupczik, Kornelius, Lebatard, Anne-Elisabeth, Lüdecke, Tina, Macôa, Amélia, Martínez, Felipe I., Mathe, Jacinto, Mendes, Clara, Paulo, Luis Meira, Pinto, Maria, Presnyakova, Darya, Püschel, Thomas A., Regala, Frederico Tátá, Sier, Mark, Ferreira da Silva, Maria Joana, Stalmans, Marc, and Carvalho, Susana

Published
2023
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4. Late Glacial deglaciation of the Zackenberg area, NE Greenland

Author

Aumaître, Georges, Bourlès, Didier, Keddadouche, Karim, Garcia-Oteyza, J., Oliva, M., Palacios, D., Fernández-Fernández, J.M., Schimmelpfennig, I., Andrés, N., Antoniades, D., Christiansen, H.H., Humlum, O., Léanni, L., Jomelli, V., Ruiz-Fernández, J., Rinterknecht, V., Lane, T.P., and Adamson, K.

Published
2022
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6. Chronology of sedimentation and landscape evolution in the Okavango Rift Zone, a developing young rift in southern Africa

Author

Vainer, Shlomy, primary, Vainer, S, additional, Schmidt, C, additional, Garzanti, E, additional, Dor, Y Ben, additional, Pastore, G, additional, Mokatse, T, additional, Prud'homme, C, additional, Leanni, L, additional, King, G, additional, Team, Aster, additional, Verrecchia, E P, additional, Aumaître, Georges, additional, Bourlès, Didier L, additional, and Keddadouche, Karim, additional

Published
2024
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8. The challenging application of cosmogenic dating methods in residual glacial landforms: the case of Sierra Nevada (Spain)

Author

Palacios Estremera, David, Gómez-Ortiz, Antonio, Alcalá-Reygosa, Jesús, De Andrés De Pablo, Nuria, Oliva, Marc, Tanarro García, Luis Miguel, Salvador-Franch, Ferran, Schimmelpfennig, Irene, Fernández Fernández, José María, Léanni, Laëtitia, Aumaître, Georges, Bourlès, Didier, Keddadouche, Karim, Palacios Estremera, David, Gómez-Ortiz, Antonio, Alcalá-Reygosa, Jesús, De Andrés De Pablo, Nuria, Oliva, Marc, Tanarro García, Luis Miguel, Salvador-Franch, Ferran, Schimmelpfennig, Irene, Fernández Fernández, José María, Léanni, Laëtitia, Aumaître, Georges, Bourlès, Didier, and Keddadouche, Karim

Abstract

An accurate review of the literature on surface exposure dating methods shows evidence of the difficulty in applying cosmogenic dating methods to old moraines because of the intensity of late Quaternary erosion processes. Moreover, as in some previous cases, we also found special difficulties in applying these methods to LIA moraines, caused by the intensity of current paraglacial processes. The objective of this study is to apply cosmogenic dating methods to very old and very young moraines, which in both cases have been or are being affected intensively by erosion. With this purpose, we collected samples of boulders from moraines corresponding to (i) the penultimate glaciation and (ii) the Little Ice Age (LIA), both from Sierra Nevada in the south of the Iberian Peninsula. The sampling strategy was based on a preliminary accurate analysis of the geomorphological settings of two valley sites that resulted in the collection of only four boulder samples from an old moraine and three more from a very recent moraine. Using in situ-produced cosmogenic 10Be to date these boulders, the old samples yielded an age of ca. 130–135 ka for moraine stabilization. The younger samples indicate that the LIA moraine accretion probably occurred between the fourteenth and seventeenth centuries, with a subsequent stage of accumulation during the nineteenth century as suggested by historical documents. Dating a glaciation that occurred prior to the last Pleistocene glacial cycle and dating LIA glacial stages are novel in the context of Iberian glaciations and agree with other palaeoenvironmental studies in Iberian and in other European mountains. The limited number of boulders adequate for cosmic-ray exposure dating prevents statistical methods to be applied, and therefore highlights the need to improve geomorphological criteria in sample selection., Ministerio de Economía y Competitividad, Programa de investigación Ramón y Cajal, Grupo de investigación ANTALP, Depto. de Geografía, Fac. de Geografía e Historia, TRUE, pub

Published
2024

11. Chronostratigraphy, depositional patterns and climatic imprints in Lake Acigöl (SW Anatolia) during the Quaternary

Author

Aumaître, Georges, Keddadouche, Karim, Demory, François, Rambeau, Claire, Lebatard, Anne-Elisabeth, Perrin, Mireille, Blawal, Syed, Andrieu-Ponel, Valérie, Rochette, Pierre, Alçiçek, Hülya, Boulbes, Nicolas, Bourlès, Didier, Helvaci, Cahit, Petschick, Rainer, Mayda, Serdar, Moigne, Anne-Marie, Nomade, Sébastien, Ponel, Philippe, Vialet, Amélie, and Alçiçek, Mehmet Cihat

Published
2020
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16. Carbonate and silicate intercomparison materials for cosmogenic 36Cl measurements

Author

Mechernich, Silke, Dunai, Tibor J., Binnie, Steven A., Goral, Tomasz, Heinze, Stefan, Dewald, Alfred, Schimmelpfennig, Irene, Keddadouche, Karim, Aumaître, Georges, Bourlès, Didier, Marrero, Shasta, Wilcken, Klaus, Simon, Krista, Fink, David, Phillips, Fred M., Caffee, Marc W., Gregory, Laura C., Phillips, Richard, Freeman, Stewart P.H.T., Shanks, Richard, Akif Sarıkaya, M., Pavetich, Stefan, Rugel, Georg, Merchel, Silke, Akçar, Naki, Yesilyurt, Serdar, Ivy-Ochs, Susan, and Vockenhuber, Christof

Published
2019
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17. No major increase in erosion rates in Central Himalayas during the late Cenozoic, revealed by 10Be in the newly dated Valmiki Siwalik section.

Author

Lenard, Sebastien J.P., primary, Lavé, Jérôme, additional, Charreau, Julien, additional, France-Lanord, Christian, additional, Schimmelpfennig, Irene, additional, Gajurel, Ananta Prassad, additional, Kaushal, Rahul Kumar, additional, Saillard, Florian, additional, Pik, Raphael, additional, Morin, Guillaume, additional, Aumaître, Georges, additional, Keddadouche, Karim, additional, Fawzi, Zaidi, additional, and Léanni, Laëtitia, additional

Published
2023
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22. Unraveling the climate control on debris-free glacier evolution in the Everest region (Nepal, central Himalaya) during the Holocene

Author

Jomelli, Vincent, primary, Wagnon, Patrick, additional, Swingedouw, Didier, additional, Charton, Joanna, additional, Braucher, Régis, additional, Hue, Adèle, additional, Brun, Fanny, additional, Colin, Christophe, additional, Gairoard, Stephanie, additional, Shrestha, Dibas, additional, Aumaître, Georges, additional, Keddadouche, Karim, additional, and Zaidi, Fawzi, additional

Published
2023
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26. The first Miocene fossils from coastal woodlands in the southern East African Rift

Author

Stratigraphy and paleontology, IVAU: Instituut voor Aardwetenschappen Utrecht, Bobe, René, Aldeias, Vera, Alemseged, Zeresenay, Anemone, Robert L., Archer, Will, Aumaître, Georges, Bamford, Marion K., Biro, Dora, Bourlès, Didier L., Doyle Boyd, Melissa, Braun, David R., Capelli, Cristian, d'Oliveira Coelho, João, Habermann, Jörg M., Head, Jason J., Keddadouche, Karim, Kupczik, Kornelius, Lebatard, Anne Elisabeth, Lüdecke, Tina, Macôa, Amélia, Martínez, Felipe I., Mathe, Jacinto, Mendes, Clara, Paulo, Luis Meira, Pinto, Maria, Presnyakova, Darya, Püschel, Thomas A., Regala, Frederico Tátá, Sier, Mark, Ferreira da Silva, Maria Joana, Stalmans, Marc, Carvalho, Susana, Stratigraphy and paleontology, IVAU: Instituut voor Aardwetenschappen Utrecht, Bobe, René, Aldeias, Vera, Alemseged, Zeresenay, Anemone, Robert L., Archer, Will, Aumaître, Georges, Bamford, Marion K., Biro, Dora, Bourlès, Didier L., Doyle Boyd, Melissa, Braun, David R., Capelli, Cristian, d'Oliveira Coelho, João, Habermann, Jörg M., Head, Jason J., Keddadouche, Karim, Kupczik, Kornelius, Lebatard, Anne Elisabeth, Lüdecke, Tina, Macôa, Amélia, Martínez, Felipe I., Mathe, Jacinto, Mendes, Clara, Paulo, Luis Meira, Pinto, Maria, Presnyakova, Darya, Püschel, Thomas A., Regala, Frederico Tátá, Sier, Mark, Ferreira da Silva, Maria Joana, Stalmans, Marc, and Carvalho, Susana

Published
2023

27. Glacier fluctuations during the Late Glacial and Holocene on the Ariège valley, northern slope of the Pyrenees and reconstructed climatic conditions

Author

Jomelli, Vincent, Chapron, Emmanuel, Favier, Vincent, Rinterknecht, Vincent, Braucher, Régis, Tournier, Nicolas, Gascoin, Simon, Marti, Renaud, Galop, Didier, Binet, Stéphane, Deschamps-Berger, Cesar, Tissoux, Helene, Aumaitre, Georges, Bourlès, Didier L., and Keddadouche, Karim

Abstract

The glacier evolution from two valleys located near Vicdessos, French Pyrenees, is deciphered from 17 in situ cosmic ray exposure (CRE) dating. In the Picot valley, Late Glacial glacier advances were documented during Heinrich Stadial 1 (HS1), while a rock glacier developed or was reactivated during the mid-Holocene. In the upper Médécourbe valley, the largest visible ice extent occurred during the Younger Dryas (YD) or earlier. At least two moraines formed during the early Holocene were dated, while an undated moraine located close to the head of the catchment may have been formed either during the Late Holocene or the Little Ice Age. A mass balance model suggests that a temperature about 5.1 °C cooler than today, without precipitation change, would be necessary to form a moraine at the base of the Picot catchment during HS1 at 2000 m a.s.l. A temperature about 3.9 °C cooler than today is necessary to explain a moraine formed during the Late Glacial–YD transition at Médécourbe at 2200 m. Comparing CRE dating from Picot and Médécourbe with those in the Pyrenees and the Alps highlights original glacial patterns. In the Picot catchment whose summit is below the current regional ELA, the absence of YD and Late Holocene moraines is consistent with the general low-altitude deglaciation trend documented in the northern and southern slope of the Pyrenees, but differs from high-altitude Pyrenean and Alpine records. However, due to specific geomorphological conditions, the glacial evolution of the Médécourbe valley took place differently compared to other low-altitude catchments in the Pyrenees.

Published
2024
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29. Comparison and performance of two cosmogenic nuclide sample preparation procedures of in situ produced 10Be and 26Al

Author

Ruszkiczay-Rüdiger, Zsófia, Neuhuber, Stephanie, Braucher, Regis, Lachner, Johannes, Steier, Peter, Wieser, Alexander, Braun, Mihály, Bourlès, Didier, Aumaître, Georges, Keddadouche, Karim, Aster, Team, Research Centre for Astronomy and Earth Sciences [Budapest], Hungarian Academy of Sciences (MTA), University of Natural Resources and Life Sciences (BOKU), Centre européen de recherche et d'enseignement des géosciences de l'environnement (CEREGE), Institut de Recherche pour le Développement (IRD)-Aix Marseille Université (AMU)-Collège de France (CdF (institution))-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), Universität Wien, and Universität für Bodenkultur Wien = University of Natural Resources and Life [Vienne, Autriche] (BOKU)

Subjects
In situ, Materials science, Health, Toxicology and Mutagenesis, Sample processing, 010502 geochemistry & geophysics, 01 natural sciences, Analytical Chemistry, Fluoride precipitates, Al, chemistry.chemical_compound, [SDU.STU.GC]Sciences of the Universe [physics]/Earth Sciences/Geochemistry, Radiology, Nuclear Medicine and imaging, Sample preparation, [SDU.STU.GM]Sciences of the Universe [physics]/Earth Sciences/Geomorphology, Cosmogenic nuclide, Comparison of laboratory protocols, Spectroscopy, 0105 earth and related environmental sciences, [SDU.STU.TE]Sciences of the Universe [physics]/Earth Sciences/Tectonics, Radionuclide, Reproducibility, 010401 analytical chemistry, Radiochemistry, Extraction (chemistry), Public Health, Environmental and Occupational Health, Be, Pollution, 0104 chemical sciences, Nuclear Energy and Engineering, chemistry, Cosmogenic radionuclides, Fluoride
Abstract

Cosmogenic radionuclide 10Be and 26Al targets (BeO and Al2O3) for AMS analysis are produced by a growing number of geochemical laboratories, employing different sample processing methods for the extraction of Be and Al from environmental materials. The reliability of this geochronological tool depends on data reproducibility independent from the preparation steps and the AMS measurements. Our results demonstrate that 10Be and 26Al concentrations of targets processed following different, commonly used protocols and measured at two AMS facilities lead to consistent results. However, insoluble fluoride precipitates, if formed during processing, can cause decreased 26Al results, while 10Be concentrations are unaffected.

Published
2021

36. Late Glacial deglaciation of the Zackenberg area, NE Greenland

Author

Garcia-Oteyza, J., primary, Oliva, M., additional, Palacios, D., additional, Fernández-Fernández, J.M., additional, Schimmelpfennig, I., additional, Andrés, N., additional, Antoniades, D., additional, Christiansen, H.H., additional, Humlum, O., additional, Léanni, L., additional, Jomelli, V., additional, Ruiz-Fernández, J., additional, Rinterknecht, V., additional, Lane, T.P., additional, Adamson, K., additional, Aumaître, Georges, additional, Bourlès, Didier, additional, and Keddadouche, Karim, additional

Published
2022
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37. A 6 Ma record of palaeodenudation in the central Himalayas from in situ cosmogenic 10 Be in the Surai section

Author

Charreau, Julien, Lave, Jerome, France-Lanord, Christian, Puchol, Nicolas, Blard, P.H., Pik, Raphaël, Gajurel, Ananta Prasad, Arnold, Maurice, Aumaitre, Georges, Bourles, D.L., Keddadouche, Karim, Centre de Recherches Pétrographiques et Géochimiques (CRPG), Institut national des sciences de l'Univers (INSU - CNRS)-Université de Lorraine (UL)-Centre National de la Recherche Scientifique (CNRS), Tribhuvan University, Centre européen de recherche et d'enseignement des géosciences de l'environnement (CEREGE), Institut de Recherche pour le Développement (IRD)-Aix Marseille Université (AMU)-Collège de France (CdF (institution))-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), and Université de Lorraine (UL)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)

Subjects
010504 meteorology & atmospheric sciences, Himalaya, Geochemistry, Sediment, Geology, 15. Life on land, Structural basin, 010502 geochemistry & geophysics, Neogene, 01 natural sciences, Deposition (geology), Sedimentary depositional environment, palaeodenudation rates, Denudation, [SDU.STU.GC]Sciences of the Universe [physics]/Earth Sciences/Geochemistry, 13. Climate action, [SDU.STU.ST]Sciences of the Universe [physics]/Earth Sciences/Stratigraphy, late Neogene, cosmogenic 10Be, Quaternary, Foreland basin, 0105 earth and related environmental sciences
Abstract

International audience; To better constrain late Neogene denudation of the Himalayas, we analysed in situ 10Be concentrations in 17 Neogene sediment samples of the Surai section (central Nepal) and two modern sediment samples of the Rapti River. We first refined the depositional ages of the Surai section from 36 new paleomagnetic analyses, five 26Al/10Be burial ages, and, based on the Dynamic Time Warping algorithm, 104 automatically calculated likely magnetostratigraphic correlations. We also traced changing sediment sources using major element and Sr‐Nd isotopic data, finding at 4–3 Ma a switch from a large, trans‐Himalayan river to a river draining only the Lesser Himalaya and Siwalik piedmont, increasing the contribution of recycled sediments at that time. 10Be concentrations in Neogene sediments range from (1.00 ± 0.36) to (5.22 ± 0.98) × 103 at g–1 and decrease with stratigraphic age. Based on a flood plain transport model, our refined age model, and assuming a drainage change at 4–3 Ma, we reconstructed 10Be concentrations at the time of deposition. Assuming cosmogenic production rates similar to those of the modern basins, we calculated palaeodenudation rates of 0.9 ± 0.5 to 3.9 ± 2.7 mm a–1 from ca. 6 to 3 Ma in the palaeo‐Karnali basin and 0.6 ± 0.2 to 1.6 ± 0.8 mm a–1 since ca. 3 Ma in the palaeo‐Rapti basin. Given the uncertainties and similar modern values of ~2 mm a–1, the palaeo‐Karnali denudation rates may have been steady at ~1.7 ± 0.3 mm a–1 for the last ca. 6 Ma. A transient acceleration of the denudation in the palaeo‐Rapti basin of ~1.5 mm a–1 since ca. 1.5 Ma was likely due to the reworking of older, 10Be‐depleted Siwalik sediments in the foreland. If true, this steadiness of the denudation rates may suggest that Quaternary glaciations did not largely affect Himalayan denudation.

Published
2020

38. Denudation and weathering rates of carbonate lithologies from meteoric 10Be/9Be ratios

Author

Wittmann, Hella, Bouchez, Julien, Calmels, Damien, Gaillardet, Jerome, Frick, Daniel, Stroncik, Nicole, Aumaître, Georges, Bourlès, Didier, Keddadouche, Karim, and von Blanckenburg, Friedhelm

Abstract

During the past decades, cosmogenic nuclides, such as in-situ produced 10Be, evolved as state-of-the-art tool to quantify millennial-scale denudation in quartz-rich landscapes. However, applications of cosmogenic nuclides to carbonate-dominated lithologies are still rare, even though carbonate dissolution is a major weathering process that may compensate anthropogenically elevated CO2 levels over centennial-millennial timescales. Recent advances in quantifying carbonate erosion have been made using cosmogenic 36Cl and of carbonate weathering using dissolved loads (e.g.[1],[2]). As these integrate over two distinct time-scales we developed a method that records such rates simultaneously: the cosmogenic meteoric 10Be over 9Be ratio (10Be/9Be). We adapted a framework[3] combining a known atmospheric flux tracer, meteoric 10Be (T1/2=1.4 My), with stable 9Be, a trace released from rocks by weathering, to the limestone-dominated French Jura Mountains. We analyzed water, soil, sediment, and bedrock for 10Be/9Be, major/trace elements, and Sr and C isotopes, to quantify i) Be contribution from carbonate vs. silicate minerals and ii) from primary vs. secondary carbonate phases, iii) solid-solute load partitioning, and iv) deep (sediment) vs. surficial (soils) weathering and erosion. Our results indicate average denudation rates of 300 t/km2/yr, denudation being dominated by weathering flux (W/D ratios of 0.7-0.97), and a consistently higher contribution from deep weathering. These rates agree to decadal-scale denudation rates from combined suspended and dissolved fluxes within < 2x which highlights the great potential of this method for future Earth’s surface studies. [1]Ott et al., JGR-ES, 2019. [2]Ben-Asher et al., GSA-Bull., 2021. [3]von Blanckenburg, F, Bouchez, J. and Wittmann, H., EPSL, 2012.

Published
2022
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39. Eolian chronology reveals causal links between tectonics, climate, and erg generation

Author

Vainer, Shlomy, Matmon, Ari, Ben Dor, Yoav, Verrecchia, Eric P., Eckardt, Frank, Aumaitre, Georges, Bourles, Didier, Keddadouche, Karim, Centre européen de recherche et d'enseignement des géosciences de l'environnement (CEREGE), Institut de Recherche pour le Développement (IRD)-Aix Marseille Université (AMU)-Collège de France (CdF (institution))-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), The Hebrew University of Jerusalem (HUJ), Geological Survey of Israel (GSI), Geological Survey of Israel, Université de Lausanne = University of Lausanne (UNIL), and University of Cape Town

Subjects
[SDU.STU.TE]Sciences of the Universe [physics]/Earth Sciences/Tectonics, [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology
Abstract

International audience; Evaluating the impact and implications of eolian repositories that mark large-scale climatic transitions requires knowledge about the timing of their emplacement and the mechanisms responsible for their production, which remain highly uncertain. Here we apply numerical modeling of cosmogenic nuclide data, measured in the largest continuous terrestrial body of sand on Earth, to determine settings under which the sand was generated, by constraining the timing of sand introduction into the interior of southern Africa. Our findings reveal that major events of sand formation and accumulation in the Kalahari Basin occurred between ~2.2 and 1 Myr ago. The establishment of the Kalahari sand field corresponds to regional, continental, and global scale morphotectonic and climatic changes that contributed to the mass production and widespread dispersion of sand. These changes substantially altered existing habitats, thus constituting a crucial milestone for flora, fauna, and hominins in southern Africa during the Pleistocene.

Published
2022

40. Evolution au cours des derniers siècles et future de la calotte Cook aux Iles Kerguelen: datations cosmogéniques et modélisation glaciologique

Author

Verfaillie, Deborah, Charton, Joanna, Schimmelpfennig, Irene, Stroebele, Zoe, Jomelli, Vincent, Betard, François, Favier, Vincent, Cavero, Julien, Berthier, Etienne, Goosse, Hugues, Rinterknecht, Vincent, Legentil, Claude, Charrassin, Raphaëlle, Aumaître, Georges, Bourlès, Didier, KEDDADOUCHE, Karim, Centre européen de recherche et d'enseignement des géosciences de l'environnement (CEREGE), Institut de Recherche pour le Développement (IRD)-Aix Marseille Université (AMU)-Collège de France (CdF (institution))-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), Laboratoire de géographie physique : Environnements Quaternaires et Actuels (LGP), Université Paris 1 Panthéon-Sorbonne (UP1)-Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12)-Centre National de la Recherche Scientifique (CNRS), Pôle de recherche pour l'organisation et la diffusion de l'information géographique (PRODIG (UMR_8586 / UMR_D_215 / UM_115)), Université Paris 1 Panthéon-Sorbonne (UP1)-Institut de Recherche pour le Développement (IRD)-AgroParisTech-Université Paris Diderot - Paris 7 (UPD7)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Institut des Géosciences de l’Environnement (IGE), Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ), Université Grenoble Alpes (UGA), Laboratoire d'études en Géophysique et océanographie spatiales (LEGOS), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP), Météo-France -Institut de Recherche pour le Développement (IRD)-Centre National de la Recherche Scientifique (CNRS)-Université Fédérale Toulouse Midi-Pyrénées-Centre National d'Études Spatiales [Toulouse] (CNES)-Météo-France -Institut de Recherche pour le Développement (IRD)-Centre National de la Recherche Scientifique (CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS), and SGF, CNRS, Laboratoire de Géologie de Lyon ou l’étude de la Terre, des planètes et de l’environnement

Subjects
calotte Cook, [SDU]Sciences of the Universe [physics], Iles Kerguelen, datations cosmogéniques, moraines, ComputingMilieux_MISCELLANEOUS, modélisation glaciologique
Abstract

International audience

Published
2021

41. The first Miocene fossils from coastal woodlands in the southern East African Rift

Author

Bobe, René, primary, Aldeias, Vera, additional, Alemseged, Zeresenay, additional, Archer, Will, additional, Aumaître, Georges, additional, Bamford, Marion K., additional, Biro, Dora, additional, Bourlès, Didier L., additional, Braun, David R., additional, Capelli, Cristian, additional, d’Oliveira Coelho, João, additional, Habermann, Jörg M., additional, Head, Jason J., additional, Keddadouche, Karim, additional, Kupczik, Kornelius, additional, Lebatard, Anne-Elisabeth, additional, Lüdecke, Tina, additional, Macôa, Amélia, additional, Martínez, Felipe I., additional, Mathe, Jacinto, additional, Mendes, Clara, additional, Meira Paulo, Luis, additional, Pinto, Maria, additional, Püschel, Thomas A., additional, Tátá Regala, Frederico, additional, Sier, Mark, additional, Ferreira da Silva, Maria Joana, additional, Stalmans, Marc, additional, and Carvalho, Susana, additional

Published
2021
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42. Origins of the divergent evolution of mountain glaciers during deglaciation: Hofsdalur cirques, Northern Iceland

Author

Tanarro, Luis M., primary, Palacios, David, additional, Fernández-Fernández, José M., additional, Andrés, Nuria, additional, Oliva, Marc, additional, Rodríguez-Mena, Manuel, additional, Schimmelpfennig, Irene, additional, Brynjólfsson, Skafti, additional, Sæmundsson, þorsteinn, additional, Zamorano, José J., additional, Úbeda, Jose, additional, Aumaître, Georges, additional, Bourlès, Didier, additional, and Keddadouche, Karim, additional

Published
2021
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43. LAKE PANNON TRANSGRESSION ON THE WESTERNMOST TIP OF THE CARPATHIANS CONSTRAINED BY BIOSTRATIGRAPHY AND AUTHIGENIC 10BE/9BE DATING (CENTRAL EUROPE)

Author

Sujan, Michal, Braucher, Regis, Mandic, Oleg, Fordinal, Klement, Brixova, Bibiana, Pipik, Radovan Kyska, Simo, Vladimir, Jamrich, Michal, Rybar, Samuel, Kluciar, Tomas, Ruman, Andrej, Zvara, Ivan, Kovac, Michal, Aumaitre, Georges, Bourles, Didier L., Keddadouche, Karim, Centre européen de recherche et d'enseignement des géosciences de l'environnement (CEREGE), Institut de Recherche pour le Développement (IRD)-Aix Marseille Université (AMU)-Collège de France (CdF (institution))-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), and Beaussier, Catherine

Subjects
QE1-996.5, [SDU.STU] Sciences of the Universe [physics]/Earth Sciences, [SDU.STU]Sciences of the Universe [physics]/Earth Sciences, Paleontology, Geology, Late Miocene, Pannonian Basin System, facies analysis, shoal water delta, cosmogenic nuclide, paleogeography, QE701-760, ComputingMilieux_MISCELLANEOUS
Abstract

The depocenters of epicontinental basins usually comprise relatively continuous depositional records, and these can be used in the determination of sediment routing and paleogeographic changes via a set of various geophysical, sedimentological, biostratigraphic and geochronological approaches. Although the margins of such basins will have a major role as constraints for that sediment routing, their depositional records are typically scarce and incomplete, posing a common challenge in terms of gaining information about them. The present study focuses on the upper Miocene succession present in the Malé Karpaty Mts., a pre-Cenozoic horst dividing the Vienna and Danube basins (Central Europe). The data gained by facies analysis, biostratigraphy, shallow seismic survey, authigenic 10Be/9Be dating and correlation of archival borehole profiles reveals, that the succession under consideration represents a record of the Lake Pannon transgression, which appeared in the study area at ~10.9–10.6 Ma. The subaerially exposed granitic massif and Middle Miocene successions sourced a shoal water delta, which intercalated with wave-induced dunes and open lacustrine muds in brackish sublittoral to marginal littoral environments. The granitic massif was probably also exposed later, during the regression of Lake Pannon at ~10.2–10.0 Ma, as a result of the progradation of the paleo-Danube delta from the Vienna Basin southeastwards. The depositional record of the regressive sequence was documented and dated in well-cores from the nearby Danube Basin margin. The documented scenario of transgression preceding the overall regression of the paleo-Danube delta system by a relatively short period is characteristic of several other localities across the Pannonian Basin System, and may imply that the progradation of depositional system caused a base-level rise on account of sediment loading-induced subsidence., RIVISTA ITALIANA DI PALEONTOLOGIA E STRATIGRAFIA , V. 127 N. 3 (2021)

Published
2021
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44. Book of Abstracts - vDEUQUA2021

Author

Abadi, Mehrdad, Abbasi, Hamidreza, Abd El-Raouf, Amr, Abdulkarim, Mubarak, Adolph, Marie-Luise, Aeschbach, Werner, Akçar, Naki, Amini, Hamideh, Andreev, Andrej, Anselmetti, Flavio S., Aumaître, Georges, Avendaño Villeda, Diana, Bartz, Melanie, Baumhauer, Roland, Bazarradnaa, Enkhtuya, Bebiolka, Anke, Behling, Hermann, Benkaddour, Abdelfattah, Binot, Franz, Birlo, Stella, Bittner, Lucas, Bliedtner, Marcel, Bolland, Alexander, Bork, Hans-Rudolf, Bouaziz, Moncef, Bourlès, Didier, Brauer, Achim, Breuer, Sonja, Bromm, Tobias, Buechi, Marius W., Burghardt, Diana, Busch, Robert, Caballero, Margarita, Carr, Andrew S., Chapkanski, Stoil, Christl, Marcus, Cosac, Marian, Dal Corso, Marta, Daniel, Thomas, Dar, Reyaz, Dave, Aditi Krishna, De Jonge, Cindy, Deplazes, Gaudenz, Dietze, Elisabeth, Dietze, Michael, Dietzel, Martin, Dreibrodt, Stefan, Drysdale, Russell, du Plessis, Nadia, Dubois, Nathalie, Duller, Geoff, Duttmann, Rainer, Duval, Mathieu, Döhlert-Albani, Norman, Egli, Markus, Einwögerer, Thomas, Elbracht, Jörg, Enters, Dirk, Enzel, Yehouda, Ertlen, Damien, Farkas, Beáta, Fattahi, Morteza, Faust, Dominik, Faybishenko, Boris, Feistmantl, Nina, Fernandez, Philippe, Ferrier, Catherine, Fiedler, Sabine, Fischer, Birgit, Fischer, Peter, Fitzsimmons, Kathryn, Fletcher, William, Frechen, Manfred, Fuchs, Margret C., Fuchs, Markus, Fuelling, Alexander, Fábián, Szabolcs, Fülling, Alexander, Garbe, Philipp, Gebhardt, Catalina, Gegg, Lukas, Geis, Anna-Lena, Geitner, Clemens, Ghanbarian, Behzad, Gianotti, Franco, Gil Romera, Graciela, Glaser, Bruno, Glückler, Ramesh, Gresina, Fruzsina, Grootes, Pieter Meiert, Guadelli, Aleta, Guadelli, Jean-Luc, Guérin, Guillaume, Haas, Jean Nicolas, Haberzettl, Torsten, Hambach, Ulrich, Hardt, Jacob, Hein, Michael, Heinrich, Hartmut, Heinrich, Susann, Herzschuh, Ulrike, Heydari, Maryam, Hildebrandt, Dominic, Hirschmann, Philip, Hofmann, Felix Martin, Hofmann, Robert, Hogrefe, Ines, Huang, Jyh-Jaan Steven, Hunt, Allen, Händel, Marc, Ivy-Ochs, Susan, Jary, Zdzisław, Jeanneret, Pilar, Jöris, Olaf, Kalicki, Tomasz, Kamleitner, Sarah, Karaschewski, Jasmin, Keddadouche, Karim, Kehl, Martin, Kern, Zoltán, Kertscher, Cathleen, Khatooni, Darvish, Khosravichenar, Azra, Kipfer, Rolf, Kirchner, André, Kirleis, Wiebke, Klaes, Björn, Knitter, Daniel, Kolb, Thomas, Konstantinovski Puntos, Cyryl, Kreienbrink, Frauke, Kreutzer, Sebastian, Kulongoski, Justin, Laag, Christian, Labahn, Jakob, Lachner, Johannes, Lak, Razyeh, Lamb, Henry F., Lampe, Reinhard, Lang, Jörg, Lange-Athinodorou, Eva, Lauer, Tobias, Leanni, Laetitia, Leblanc, Jean-Claude, Lee, An-Sheng, Lehmkuhl, Frank, Lempe, Bernhard, Lerch, Marcel, Liou, Sofia Ya Hsuan, Lisa, Lenka, Liu, Zuorui, Lomax, Johanna, Lorenz, Sebastian, Lozano García, Socorro, Madarász, Balázs, Madritsch, Herfried, Maier, Andreas, Mangelsdorf, Kai, Markovic, Slobodan, Martinez Abarca, Luis Rodrigo, Marx, Samuel, May, Jan-Hendrik, Mayr, Christoph, Meister, Julia, Merchel, Silke, Meszner, Sascha, Meyer, Juliane, Mikdad, Abdeslam, Milevski, Ivica, Mir, Jehangeer, Mischke, Steffen, Mohammadi, Ali, Monegato, Giovanni, Moreiras, Stella, Mueller, Daniela, Muratoreanu, George, Müller, Daniela, Müller, Johannes, Nadeau, Marie-Josée, Nett, Janina, Neugebauer, Ina, Ng, Jessica, Nill, Leon, Nir, Nadav, Ohlendorf, Christian, Opp, Christian, Orgeira, Maria, Ortega Guerrero, Beatriz, Pasda, Clemens, Pasda, Kerstin, Penkman, Kirsty, Peric, Zoran, Pichat, Sylvain, Piller, Werner, Polgar, Irene, Prendergast, Amy, Preusser, Frank, Prud'homme, Charlotte, Pötter, Stephan, Quick, Lynne J., Rambeau, Claire, Reichert, Markus, Reimann, Tony, Reiss, Lilian, Roettig, Christopher-Bastian, Rolf, Christian, Russell, James, Ruszkiczay-Rüdiger, Zsófia, Ryzner, Kamila, Sahakyan, Lilit, Salazar, Gary, Salomon, Ferréol, Sardar Abadi, Mehrdad, Sarı, Selma, Scardia, Giancarlo, Schiestl, Robert, Schimmelpfennig, Irene, Schirmer, Wolfgang, Schmidt, Christoph, Schmidt, Johannes, Schmitt, Laurent, Schneider, Birgit, Schulte, Philipp, Schulze, Tabea, Schunke, Torsten, Schwab, Markus J., Schwahn, Lea, Schwamborn, Georg, Schwark, Lorenz, Schäfer, Dieter, Schütt, Brigitta, Seltzer, Alan, Selzer, Johnnes, Severinghaus, Jeffrey, Shah, Rayees, Simon, Ulrich, Sirakov, Nikolay, Sirakova, Svoboda, Sontag-González, Mariana, Sprafke, Tobias, Stahlschmidt, Mareike, Stauber, Theresa, Steier, Peter, Steiner, Martin, Stojakowits, Philipp, Strobel, Paul, Stroessner, Kathrin, Struck, Julian, Stute, Martin, Stutzriemer, Marika, Stäuble, Harald, Szidat, Sönke, Taneva, Stanimira, Tanner, David, ASTER, Team, Temovski, Marjan, Tinapp, Christian, Tjallingii, Rik, Trappe, Julian, Tylmann, Wojciech, Ulfers, Arne, Ullmann, Tobias, Urban, Brigitte, van Meer, Mike, Varga, György, Veres, Daniel, Verstraeten, Gert, Videiko, Michail, Vinnepand, Mathias, Vockenhuber, Christof, Vogel, Hendrik, Voigt, Silke, von Suchodoletz, Hans, Vött, Andreas, Weiß, Marcel, Werther, Lukas, Wolf, Daniel, Wonik, Thomas, Wrozyna, Claudia, Wunderlich, Tina, Zech, Michael, Zech, Roland, Zeeden, Christian, Zielhofer, Christoph, Zolitschka, Bernd, Zöller, Ludwig, Żurek, Krzysztof, von Suchodoletz, Hans, Dietze, Elisabeth, Dietze, Michael, Meister, Julia, Wrozyna, Claudia, Zeeden, Christian, Kreutzer, Sebastian, and Hildebrandt, Dominic

Subjects
Quaternary, Conference abstracts, Geoscience
Abstract

Collection of conference abstracts presented at the vDEUQUA2021 (2021-09-30 to 2021-09-01), the virtual meeting of the German Quaternary Association (DEUQUA).

Published
2021
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45. Javanese Homo erectus on the move in SE Asia circa 1.8 Ma.

Author

Husson, Laurent, Salles, Tristan, Lebatard, Anne-Elisabeth, Zerathe, Swann, Braucher, Régis, Noerwidi, Sofwan, Aribowo, Sonny, Mallard, Claire, Carcaillet, Julien, Natawidjaja, Danny H., Bourlès, Didier, ASTER team, Aumaitre, Georges, and Keddadouche, Karim

Subjects
COSMOGENIC nuclides, FOSSIL hominids, HOMO erectus, HUMAN evolution, PLEISTOCENE Epoch, HOMINIDS, ARCHIPELAGOES
Abstract

The migration of Homo erectus in Southeast Asia during Early Pleistocene is cardinal to our comprehension of the evolution of the genus Homo. However, the limited consideration of the rapidly changing physical environment, together with controversial datings of hominin bearing sites, make it challenging to secure the robust timeline needed to unveil the behavior of early humans. Here, we reappraise the first appearance datum of Javanese H. erectus by adding the most reliable age constraints based on cosmogenic nuclides 10 Be and 26 Al produced in situ to a compilation of earlier estimates. We find that H. erectus reached Java and dwelled at Sangiran, Java, ca. 1.8 Ma. Using this age as a baseline, we develop a probabilistic approach to reconstruct their dispersal routes, coupling ecological movement simulations to landscape evolution models forced by reconstructed geodynamic and climatic histories. We demonstrate that the hospitable terra firma conditions of Sundaland facilitated the prior dispersal of hominins to the edge of Java, where they conversely could not settle until the Javanese archipelago emerged from the sea and connected to Sundaland. The dispersal of H. erectus across Sundaland occurred over at least tens to hundreds kyr, a time scale over which changes in their physical environment, whether climatic or physiographic, may have become primary forcings on their behavior. Our comprehensive reconstruction method to unravel the peopling timeline of SE Asia provides a novel framework to evaluate the evolution of early humans. [ABSTRACT FROM AUTHOR]

Published
2022
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46. WITHDRAWN: Didier L. Bourlès (1955–2021), the 5 MV cosmogenic rock star…

Author

Braucher, Régis, Blard, Pierre-Henri, Brown, Erik T., Carcaillet, Julien, Lebatard, Anne-Elisabeth, Siame, Lionel, Simon, Quentin, Thouveny, Nicolas, Aumaître, Georges, Carretier, Sébastien, Cornu, Sophie, Godard, Vincent, Fink, David, Finkel, Robert, German, Chris, Hamelin, Bruno, Hofmann, Felix Martin, Jomelli, Vincent, Keddadouche, Karim, Kurz, Mark D., Palacios, David, Measures, Chris, Merchel, Silke, Regard, Vincent, Schimmelpfennig, Irene, von Blanckenburg, Friedhelm, and Zerathe, Swann

Published
2021
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47. Didier L. Bourlès (1955–2021), the 5 MV cosmogenic rock star

Author

Braucher, Régis, Blard, Pierre-Henri, Brown, Erik T., Carcaillet, Julien, Lebatard, Anne-Elisabeth, Siame, Lionel, Simon, Quentin, Thouveny, Nicolas, Aumaître, Georges, Bard, Edouard, Carretier, Sébastien, Cornu, Sophie, Fink, David, Finkel, Robert, German, Chris, Godard, Vincent, Gosse, John, Hamelin, Bruno, Hofmann, Felix Martin, Jomelli, Vincent, Keddadouche, Karim, Kurz, Mark D., Matmon, Ari, Palacios, David, Measures, Chris, Merchel, Silke, Regard, Vincent, Schimmelpfennig, Irene, Von Blanckenburg, Friedhelm, and Zerathe, Swann

Published
2021
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48. Evolution of a debris-covered glacier in the Kerguelen Archipelago (49°S, 69°E) over the past 15,000 years constrained by in situ cosmogenic 36Cl dating

Author

Jomelli, Vincent, Charton, Joanna, Schimmelpfennig, Irene, Verfaillie, Deborah, Favier, Vincent, Mokadem, Fatima, Gilbert, Adrien, Brun, Fanny, Aumaître, Georges, Bourlès, Didier, Keddadouche, Karim, ASTER, Team, Centre européen de recherche et d'enseignement des géosciences de l'environnement (CEREGE), Institut de Recherche pour le Développement (IRD)-Aix Marseille Université (AMU)-Collège de France (CdF (institution))-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), Earth and Life Institute [Louvain-La-Neuve] (ELI), Université Catholique de Louvain = Catholic University of Louvain (UCL), Institut des Géosciences de l’Environnement (IGE), Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ), Université Grenoble Alpes (UGA), Laboratoire de géographie physique : Environnements Quaternaires et Actuels (LGP), Université Paris 1 Panthéon-Sorbonne (UP1)-Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12)-Centre National de la Recherche Scientifique (CNRS), Plateforme de géochimie isotopique ASTER-CEREGE, and Institut de Recherche pour le Développement (IRD)-Aix Marseille Université (AMU)-Collège de France (CdF (institution))-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Institut de Recherche pour le Développement (IRD)-Aix Marseille Université (AMU)-Collège de France (CdF (institution))-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)

Subjects
[SDU]Sciences of the Universe [physics], [SDE]Environmental Sciences
Abstract

International audience; Debris-covered glaciers constitute a substantial part of the worldwide cryosphere (Scherler et al.2018). However, their long-term response to multi-millennial climate variability has rarely been studied, in particular in the Southern Hemisphere. The presence of both debris-covered and debris-free glaciers on Kerguelen Archipelago (49°S, 69°E) offers therefore an excellent opportunity to investigate and compare long-term evolution of these two types of glaciers. To do so, we used the cosmogenic 36Cl surface dating method on moraine boulders that allows to establish temporal constraints of glacier oscillation. We provide here the first Late Glacial and Holocene glacier chronology of a still active debris-covered glacier from the archipelago: the Gentil Glacier. Results show that the Gentil Glacier advanced once at ~14.3 ka, i.e. during the Late Glacial (19.0 – 11.6 ka), and re-advanced during the Late Holocene at ~2.6 ka (Charton et al., 2020). Both debris-covered and debris-free glaciers experienced a broadly synchronous advance during the Late Glacial, that may be assigned to the Antarctic Cold Reversal event (14.5 – 12.9 ka) (Jomelli et al., 2017; 2018). This suggests that both types (debris-covered and debris-free) of glaciers at Kerguelen were sensitive to large amplitude temperature fluctuations recorded in Antarctic ice cores (WAIS divide Project Members, 2013), associated with increased precipitations (Van der Putten, 2015). However, during the Late Holocene, the advance at about ~2.6 ka was not observed on other glaciers and seems to be a specific response of the debris-covered Gentil Glacier, either related to distinct ice dynamics or an individual response to precipitation changes

Published
2021

49. Millennial‐scale deglaciation across the European Alps at the transition between the Younger Dryas and the Early Holocene - evidence from a new cosmogenic nuclide chronology

Author

Protin, Marie, Schimmelpfennig, Irene, Mugnier, Jean‐louis, Buoncristiani, Jean‐François, Le Roy, Melaine, Pohl, Benjamin, Moreau, Luc, Aumaitre, Georges, Bourlès, Didier, Keddadouche, Karim, Centre européen de recherche et d'enseignement des géosciences de l'environnement (CEREGE), Institut de Recherche pour le Développement (IRD)-Aix Marseille Université (AMU)-Collège de France (CdF (institution))-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), Centre de Recherches Pétrographiques et Géochimiques (CRPG), Institut national des sciences de l'Univers (INSU - CNRS)-Université de Lorraine (UL)-Centre National de la Recherche Scientifique (CNRS), Institut des Sciences de la Terre (ISTerre), Institut national des sciences de l'Univers (INSU - CNRS)-Institut de recherche pour le développement [IRD] : UR219-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS)-Université Gustave Eiffel-Université Grenoble Alpes (UGA), Biogéosciences [UMR 6282] [Dijon] (BGS), Université de Bourgogne (UB)-AgroSup Dijon - Institut National Supérieur des Sciences Agronomiques, de l'Alimentation et de l'Environnement-Centre National de la Recherche Scientifique (CNRS), Institute for Environmental Sciences [Geneva] (ISE), University of Geneva [Switzerland], Environnements, Dynamiques et Territoires de la Montagne (EDYTEM), Centre National de la Recherche Scientifique (CNRS)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry]), ANR-14-CE03-0006,VIP-Mont-Blanc,VItesses des Processus contrôlant les évolutions morphologiques et environnementales du massif du Mont Blanc(2014), Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Collège de France (CdF (institution))-Institut national des sciences de l'Univers (INSU - CNRS)-Aix Marseille Université (AMU)-Institut National de la Recherche Agronomique (INRA), Institut Français des Sciences et Technologies des Transports, de l'Aménagement et des Réseaux (IFSTTAR)-Institut national des sciences de l'Univers (INSU - CNRS)-Institut de recherche pour le développement [IRD] : UR219-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019]), Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS), Biogéosciences [UMR 6282] (BGS), Université de Bourgogne (UB)-Centre National de la Recherche Scientifique (CNRS), Université de Genève = University of Geneva (UNIGE), and Environnements, Dynamiques et Territoires de Montagne (EDYTEM)

Subjects
010506 paleontology, Archeology, geography, geography.geographical_feature_category, 010504 meteorology & atmospheric sciences, Climate change, [SDU.STU]Sciences of the Universe [physics]/Earth Sciences, Geology, Glacier, 01 natural sciences, 13. Climate action, Moraine, [SDU.STU.GC]Sciences of the Universe [physics]/Earth Sciences/Geochemistry, [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology, Deglaciation, Physical geography, Younger Dryas, [SDU.STU.GM]Sciences of the Universe [physics]/Earth Sciences/Geomorphology, [SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology, Cosmogenic nuclide, Ecology, Evolution, Behavior and Systematics, Holocene, 0105 earth and related environmental sciences, Teleconnection
Abstract

15 pages; International audience; Reconstructing the spatial and temporal response of mountain glaciers to rapid climate change in the past provides access to the effects of current climate change. Yet, the spatial and temporal variability of past glacier fluctuations is not fully understood. In this study, we focus on the timing of glacier fluctuations in the European Alps during the Younger Dryas/Early Holocene (YD/EH) transition. In an effort to elucidate whether glacier fluctuations were synchronous during this period, we present a new chronology of the Alpine Talèfre glacier, based on 14 new 10Be ages of moraines and roches moutonnées. The retreat of Talèfre glacier was initiated during the mid-YD (~12.4 ka), then it experienced a gradual retreat punctuated by at least three oscillations until ∼11 ka before shrinking substantially within its Little Ice Age limits (13th−19th centuries). Comparison of our findings with published glacier chronologies in the Alpine region highlights broadly synchronous behaviour of glaciers across the Alps between 12 and 10 ka. The coeval glacier fluctuations at a regional scale suggest that common regional climate conditions had a major impact on Alpine glacier variations during the YD/EH transition. The similarity of glacier behaviour and independent temperature records in both the Alpine region and the northern high latitudes suggests a teleconnection between these regions, but differences in the amplitude of the mean annual temperature signals relative to summer temperature indicate pronounced changes in seasonality between the YD and the EH.

Published
2021

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