Holocene glacial oscillations in the Tyroler Valley (NE Greenland)

Although the spatiotemporal oscillations of the Greenland Ice Sheet (GrIS) during the last millennia have played a prominent role in global environmental changes, its glacial response to the natural variability still needs to be better constrained. Here, we focused on the reconstruction of the glaci...

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Autores: Garcia-Oteyza Cira, Julia, Oliva Franganillo, Marc, Palacios Estremera, David, Fernández-Fernández, José Manuel, Schimmelpfennig, Irene, Fernandes, Marcelo, Medialdea, Alicia, Giralt Romeu, Santiago, Jomelli, Vincent, Antoniades, Dermot, ASTER Team
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2023
País:España
Institución:Universidad de Barcelona
Repositorio:Dipòsit Digital de la UB
OAI Identifier:oai:diposit.ub.edu:2445/220025
Acceso en línea:https://hdl.handle.net/2445/220025
Access Level:acceso abierto
Palabra clave:Oscil·lacions
Holocè
Períodes glacials
Raigs còsmics
Geomorfologia glacial
Grenlàndia
Glaceres
Oscillations
Holocene
Glacial epoch
Cosmic rays
Glacial landforms
Greenland
Glaciers
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spelling Holocene glacial oscillations in the Tyroler Valley (NE Greenland)Garcia-Oteyza Cira, JuliaOliva Franganillo, MarcPalacios Estremera, DavidFernández-Fernández, José ManuelSchimmelpfennig, IreneFernandes, MarceloMedialdea, AliciaGiralt Romeu, SantiagoJomelli, VincentAntoniades, DermotASTER TeamOscil·lacionsHolocèPeríodes glacialsRaigs còsmicsGeomorfologia glacialGrenlàndiaGlaceresOscillationsHoloceneGlacial epochCosmic raysGlacial landformsGreenlandGlaciersAlthough the spatiotemporal oscillations of the Greenland Ice Sheet (GrIS) during the last millennia have played a prominent role in global environmental changes, its glacial response to the natural variability still needs to be better constrained. Here, we focused on the reconstruction of the glacial behavior and deglaciation process along the Tyroler Valley (74 N, 22 E), within the Northeast Greenland National Park. This NW-SE valley connects with the GrIS via the Pasterze Glacier and divides two ice caps (A.P. Olsen Land and Payer Land), this last one feeding two piedmont glaciers (Copeland and Kløft glaciers). For this study, we combined the interpretation of the spatial pattern of geomorphological features and the chronological framework defined by a new dataset of 15 10Be cosmic-ray exposure (CRE) ages from glacially polished bedrock surfaces and moraine boulders together with one optically stimulated luminescence (OSL) age of a glaciolacustrine deposit. CRE ages indicate that the deglaciation of the lowest parts of the valley and the exposure of the highest slopes took place during the Early Holocene, at ca. 10–8.5 ka (ka = thousand year [BP]). Furthermore, this ice thinning also favored the disconnection of the valley tributary glaciers. Samples from the moraines of the two tributary glaciers indicate that the deglaciation was not continuous, but it was interrupted by at least three phases of glacial advance during the Neoglacial cooling (before ca. 5.9 ka), and the Little Ice Age (LIA, 0.6, and 0.3 ka). The larger piedmont glacier (Copeland Glacier) occupied the valley floor during these major advances, damming the river and allowing the formation of a proglacial glacial lake upvalley, as confirmed by the OSL date of lacustrine sediments that yielded an age of 0.53 ± 0.06 ka. In short, our study provides new evidence of the relative stability of GrIS and the regional ice caps in the area, in which glacial fronts have been rather stable since their advances during the Neoglacial and the LIA.John Wiley & Sons2023info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://hdl.handle.net/2445/220025Articles publicats en revistes (Geografia)reponame:Dipòsit Digital de la UBinstname:Universidad de BarcelonaInglésReproducció del document publicat a: https://doi.org/10.1002/ldr.4633Land Degradation & Development, 2023, vol. 34, num.9, p. 2589-2606https://doi.org/10.1002/ldr.4633cc-by-nc-nd (c) Garcia-Oteyza Cira, Julia, et al. 2023http://creativecommons.org/licenses/by-nc-nd/3.0/es/info:eu-repo/semantics/openAccessoai:diposit.ub.edu:2445/2200252026-05-27T06:46:51Z
dc.title.none.fl_str_mv Holocene glacial oscillations in the Tyroler Valley (NE Greenland)
title Holocene glacial oscillations in the Tyroler Valley (NE Greenland)
spellingShingle Holocene glacial oscillations in the Tyroler Valley (NE Greenland)
Garcia-Oteyza Cira, Julia
Oscil·lacions
Holocè
Períodes glacials
Raigs còsmics
Geomorfologia glacial
Grenlàndia
Glaceres
Oscillations
Holocene
Glacial epoch
Cosmic rays
Glacial landforms
Greenland
Glaciers
title_short Holocene glacial oscillations in the Tyroler Valley (NE Greenland)
title_full Holocene glacial oscillations in the Tyroler Valley (NE Greenland)
title_fullStr Holocene glacial oscillations in the Tyroler Valley (NE Greenland)
title_full_unstemmed Holocene glacial oscillations in the Tyroler Valley (NE Greenland)
title_sort Holocene glacial oscillations in the Tyroler Valley (NE Greenland)
dc.creator.none.fl_str_mv Garcia-Oteyza Cira, Julia
Oliva Franganillo, Marc
Palacios Estremera, David
Fernández-Fernández, José Manuel
Schimmelpfennig, Irene
Fernandes, Marcelo
Medialdea, Alicia
Giralt Romeu, Santiago
Jomelli, Vincent
Antoniades, Dermot
ASTER Team
author Garcia-Oteyza Cira, Julia
author_facet Garcia-Oteyza Cira, Julia
Oliva Franganillo, Marc
Palacios Estremera, David
Fernández-Fernández, José Manuel
Schimmelpfennig, Irene
Fernandes, Marcelo
Medialdea, Alicia
Giralt Romeu, Santiago
Jomelli, Vincent
Antoniades, Dermot
ASTER Team
author_role author
author2 Oliva Franganillo, Marc
Palacios Estremera, David
Fernández-Fernández, José Manuel
Schimmelpfennig, Irene
Fernandes, Marcelo
Medialdea, Alicia
Giralt Romeu, Santiago
Jomelli, Vincent
Antoniades, Dermot
ASTER Team
author2_role author
author
author
author
author
author
author
author
author
author
dc.subject.none.fl_str_mv Oscil·lacions
Holocè
Períodes glacials
Raigs còsmics
Geomorfologia glacial
Grenlàndia
Glaceres
Oscillations
Holocene
Glacial epoch
Cosmic rays
Glacial landforms
Greenland
Glaciers
topic Oscil·lacions
Holocè
Períodes glacials
Raigs còsmics
Geomorfologia glacial
Grenlàndia
Glaceres
Oscillations
Holocene
Glacial epoch
Cosmic rays
Glacial landforms
Greenland
Glaciers
description Although the spatiotemporal oscillations of the Greenland Ice Sheet (GrIS) during the last millennia have played a prominent role in global environmental changes, its glacial response to the natural variability still needs to be better constrained. Here, we focused on the reconstruction of the glacial behavior and deglaciation process along the Tyroler Valley (74 N, 22 E), within the Northeast Greenland National Park. This NW-SE valley connects with the GrIS via the Pasterze Glacier and divides two ice caps (A.P. Olsen Land and Payer Land), this last one feeding two piedmont glaciers (Copeland and Kløft glaciers). For this study, we combined the interpretation of the spatial pattern of geomorphological features and the chronological framework defined by a new dataset of 15 10Be cosmic-ray exposure (CRE) ages from glacially polished bedrock surfaces and moraine boulders together with one optically stimulated luminescence (OSL) age of a glaciolacustrine deposit. CRE ages indicate that the deglaciation of the lowest parts of the valley and the exposure of the highest slopes took place during the Early Holocene, at ca. 10–8.5 ka (ka = thousand year [BP]). Furthermore, this ice thinning also favored the disconnection of the valley tributary glaciers. Samples from the moraines of the two tributary glaciers indicate that the deglaciation was not continuous, but it was interrupted by at least three phases of glacial advance during the Neoglacial cooling (before ca. 5.9 ka), and the Little Ice Age (LIA, 0.6, and 0.3 ka). The larger piedmont glacier (Copeland Glacier) occupied the valley floor during these major advances, damming the river and allowing the formation of a proglacial glacial lake upvalley, as confirmed by the OSL date of lacustrine sediments that yielded an age of 0.53 ± 0.06 ka. In short, our study provides new evidence of the relative stability of GrIS and the regional ice caps in the area, in which glacial fronts have been rather stable since their advances during the Neoglacial and the LIA.
publishDate 2023
dc.date.none.fl_str_mv 2023
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv https://hdl.handle.net/2445/220025
url https://hdl.handle.net/2445/220025
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Reproducció del document publicat a: https://doi.org/10.1002/ldr.4633
Land Degradation & Development, 2023, vol. 34, num.9, p. 2589-2606
https://doi.org/10.1002/ldr.4633
dc.rights.none.fl_str_mv cc-by-nc-nd (c) Garcia-Oteyza Cira, Julia, et al. 2023
http://creativecommons.org/licenses/by-nc-nd/3.0/es/
info:eu-repo/semantics/openAccess
rights_invalid_str_mv cc-by-nc-nd (c) Garcia-Oteyza Cira, Julia, et al. 2023
http://creativecommons.org/licenses/by-nc-nd/3.0/es/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv John Wiley & Sons
publisher.none.fl_str_mv John Wiley & Sons
dc.source.none.fl_str_mv Articles publicats en revistes (Geografia)
reponame:Dipòsit Digital de la UB
instname:Universidad de Barcelona
instname_str Universidad de Barcelona
reponame_str Dipòsit Digital de la UB
collection Dipòsit Digital de la UB
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15.811543

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