Por favor, use este identificador para citar o enlazar a este item:
http://hdl.handle.net/10261/202372
COMPARTIR / EXPORTAR:
SHARE CORE BASE | |
Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL | DATACITE | |
Título: | A study on a 210Pbex accumulation-decay model for dating moraine soils to trace glacier retreat time |
Autor: | Chen, Jiacun; Zhang, Xinbao; Navas Izquierdo, Ana CSIC ORCID ; Wen, Anbang; Wang, Xiaoxiao; Zhang, Runchuan | Palabras clave: | 210Pbex accumulation-decay model 137Cs Dating moraine soils Glacier retreat time Hailuogou glacier China |
Fecha de publicación: | feb-2020 | Editor: | Elsevier | Citación: | Chen J, Zhang X, Navas A, Wen A, Wang X, Zhang R. A study on a 210Pbex accumulation-decay model for dating moraine soils to trace glacier retreat time. Journal of Environmental Radioactivity 212: 106124 (2020) | Resumen: | This paper reports work exploring the potential for using the natural fallout radionuclide 210Pbex to date moraine soils for tracing glacier retreat. Based on the physical processes of 210Pbex deposition, decay and losses due to runoff, a210Pbex accumulation-decay model ( ) was developed, where = 210Pbex inventory (Bq·m−2); = annual inventory of 210Pbex deposition (Bq·m−2); = 210 Pb decay coefficient (0.969); = time span (years); b and c = 210Pbex loss coefficients for the runoff pathway. Furthermore, 137Cs was used to identify the ages of the study sites and to support the 210Pbex model results. The model was validated with data obtained from the Hailuogou Glacier Valley, Mt. Gongga, in 2016, where nine glacier retreat moraine points were recorded from 1910 to 1990 along a retreat length of 1750 m in the valley. 210Pbex inventories increased from 3,669.6 ± 218.5 Bq·m−2 at the site where the glacier retreated in 1990 to 10,718.9 ± 167.4 Bq·m−2 in 1910. The coefficients of b = 0.6006 and c = 0.9764 were derived from the 210Pbex inventories at the nine sites with recorded glacier retreat times that were marked with special stone and terrain features. The goodness-of-fit (GOF) for the model predictions of glacier retreat times is 65.5%. The results obtained confirm that the fallout radionuclide 210Pbex has potential for dating moraine soils in other cryosphere regions throughout the world as well as for other types of records forming sedimentary landform sequences such as soils on debris flows and alluvial fans. | Descripción: | 31 Pags.- 3 Tabls.- 5 Figs. | Versión del editor: | https://doi.org/10.1016/j.jenvrad.2019.106124 | URI: | http://hdl.handle.net/10261/202372 | DOI: | 10.1016/j.jenvrad.2019.106124 | ISSN: | 0265-931X |
Aparece en las colecciones: | (EEAD) Artículos |
Ficheros en este ítem:
Fichero | Descripción | Tamaño | Formato | |
---|---|---|---|---|
NavasA_JEnvironmRadioact_2020.pdf | 3,98 MB | Adobe PDF | Visualizar/Abrir |
CORE Recommender
SCOPUSTM
Citations
7
checked on 11-abr-2024
WEB OF SCIENCETM
Citations
5
checked on 27-feb-2024
Page view(s)
194
checked on 18-abr-2024
Download(s)
89
checked on 18-abr-2024
Google ScholarTM
Check
Altmetric
Altmetric
NOTA: Los ítems de Digital.CSIC están protegidos por copyright, con todos los derechos reservados, a menos que se indique lo contrario.