Por favor, use este identificador para citar o enlazar a este item:
http://hdl.handle.net/10261/334090
COMPARTIR / EXPORTAR:
SHARE CORE BASE | |
Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL | DATACITE | |
Título: | Beryllium isotope variations recorded in the Adélie Basin, East Antarctica reflect Holocene changes in ice dynamics, productivity, and scavenging efficiency |
Autor: | Behrens, Bethany C.; Yokoyama, Yusuke; Miyairi, Yosuke; Sproson, Adam D.; Yamane, Masako; Jiménez-Espejo, Francisco J.; McKay, Robert M.; Johnson, Katelyn M.; Escutia, Carlota CSIC ORCID ; Dunbar, Robert B. | Palabras clave: | Holocene East Antarctica Cosmogenic nuclides Beryllium isotopes Scavenging |
Fecha de publicación: | jul-2022 | Editor: | Elsevier BV | Citación: | Quaternary Science Advances 7: 100054 (2022) | Resumen: | The Adélie Basin is a relatively small (∼1600 km), semi-enclosed continental shelf bathymetric depression located adjacent to the Wilkes Subglacial Basin, a basin underlying a sector of the East Antarctic Ice Sheet that contains ∼3–4 m sea level equivalent of ice. Located within the Adélie Basin is a ∼184 m thick laminated sediment deposit, the Adélie Drift, ideal for examining regional changes in ice sheet and ocean dynamics. Here, we examine the ratio of reactive beryllium-10 to reactive beryllium-9 ((Be/Be)) in a marine sediment core obtained from the Adélie Drift to assess these changes during the Holocene epoch (11.7 ka BP to present). The (Be/Be) record provides insight into changes in freshwater input, primary productivity, and scavenging efficiency, while removing the influence of particle size on Be concentration. During the early Holocene, (Be/Be) ratios indicate increased meltwater discharge from ca. 11.7 to 10 ka BP, as grounded ice retreated from the Adélie Basin and adjacent bathymetric highs. After ∼10 ka BP, beryllium isotopes are influenced by scavenging efficiency and dilution controlled by ocean currents and accumulation rate, operating alongside meltwater input, suggesting there are additional factors to consider when using (Be/Be) as a proxy for ice shelf cover and glacial dynamics. | Versión del editor: | http://dx.doi.org/10.1016/j.qsa.2022.100054 | URI: | http://hdl.handle.net/10261/334090 | DOI: | 10.1016/j.qsa.2022.100054 | Identificadores: | doi: 10.1016/j.qsa.2022.100054 issn: 2666-0334 |
Aparece en las colecciones: | (IACT) Artículos |
Ficheros en este ítem:
Fichero | Descripción | Tamaño | Formato | |
---|---|---|---|---|
JimenezEspejo_QuaternarySciAdv2022_7_100054.pdf | 4,76 MB | Adobe PDF | Visualizar/Abrir |
CORE Recommender
SCOPUSTM
Citations
3
checked on 22-abr-2024
WEB OF SCIENCETM
Citations
1
checked on 25-feb-2024
Page view(s)
37
checked on 26-abr-2024
Download(s)
57
checked on 26-abr-2024
Google ScholarTM
Check
Altmetric
Altmetric
Este item está licenciado bajo una Licencia Creative Commons