English   español  
Por favor, use este identificador para citar o enlazar a este item: http://hdl.handle.net/10261/156166
COMPARTIR / IMPACTO:
Estadísticas
logo share SHARE logo core CORE   Add this article to your Mendeley library MendeleyBASE

Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL
Exportar a otros formatos:
Título

Radionuclides and soil properties as indicators of glacier retreat in a recently deglaciated permafrost environment of the Maritime Antarctica

AutorNavas Izquierdo, Ana ; Oliva, Marc; Ruiz-Fernández, Jesús; Gaspar Ferrer, Leticia ; Quijano Gaudes, Laura ; Lizaga Villuendas, Iván
Palabras clave137Cs
SOC
ERNs
Cryosols
Glacial landforms
Elephant Point
Fecha de publicacióndic-2017
EditorElsevier
CitaciónNavas A, Oliva M, Ruiz-Fernández J, Gaspar L, Quijano L, Lizaga I. Radionuclides and soil properties as indicators of glacier retreat in a recently deglaciated permafrost environment of the Maritime Antarctica. Science of The Total Environment 609: 192-204 (2017)
ResumenMany ice-free environments in Maritime Antarctica are undergoing rapid and substantial environmental changes in response to recent climate trends. This is the case of Elephant Point (Livingston Island, South Shetland Islands, SSI), where the glacier retreat recorded during the last six decades exposed 17% of this small peninsula, namely a moraine extending from the western to the eastern coastlines and a relatively flat proglacial surface. In the southern margin of the peninsula, a sequence of Holocene raised beaches and several bedrock plateaus are also distributed. A main issue in this environment is the role of glacier retreat and permafrost controlling the recently formed soils. To this purpose, a total of 10 sites were sampled along a transect crossing raised beaches and moraine materials following the direction of glacier retreat. At the selected sites surface samples were collected until 12 cm depth and sectioned at 3 cm depth intervals to analyse main properties, grain size, pH, electrical conductivity and carbonates. Besides, elemental composition and fallout (FRNs) and environmental radionuclides (ERNs) were analysed. To assess if profile characteristics within the active layer are affected by glacier retreat variations of organic carbon and carbon fractions and 137Cs contents were examined. The presence of organic carbon (range: 0.13–3.19%), and 137Cs (range: bdl–10.1 Bq kg− 1) was only found at the raised beaches. The surface samples had abundant coarse fractions in rich sandy matrix with increasing acidic pH towards the coast. Significant differences were found in the elemental composition and the radionuclides between the moraine and raised beaches. Soil forming processes are related to the time of exposure of the landforms after glacier retreat. The results obtained confirm the potential for using geomorphological, edaphic and geochemical data to assess the influence of different stages of glacier retreat in recent soils and sediments.
Descripción45 Pags.- 4 Figs.- 6 Tabls. The definitive version is available at: http://www.sciencedirect.com/science/journal/00489697
Versión del editorhttps://doi.org/10.1016/j.scitotenv.2017.07.115
URIhttp://hdl.handle.net/10261/156166
DOI10.1016/j.scitotenv.2017.07.115
ISSN0048-9697
E-ISSN1879-1026
Aparece en las colecciones: (EEAD) Artículos
Ficheros en este ítem:
Fichero Descripción Tamaño Formato  
NavasA_ScieTotEnv_2017.pdf Embargado hasta 1 de enero de 20201,8 MBAdobe PDFVista previa
Visualizar/Abrir     Petición de una copia
Mostrar el registro completo
 

Artículos relacionados:


NOTA: Los ítems de Digital.CSIC están protegidos por copyright, con todos los derechos reservados, a menos que se indique lo contrario.