English   español  
Por favor, use este identificador para citar o enlazar a este item: http://hdl.handle.net/10261/134873
Compartir / Impacto:
Estadísticas
Add this article to your Mendeley library MendeleyBASE
Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL
Título

Coccolithophore productivity and surface water dynamics in the Alboran Sea during the last 25kyr

Otros títulosTracking productivity and surface water dynamics in the Alboran Sea during the last 25 kyr
AutorAusín, Blanca; Flores, José Abel; Sierro, Francisco J.; Bárcena, María Ángeles; Hernández-Almeida, Iván; Francés, Guillermo; Gutiérrez-Arnillas, Esther; Martrat, Belen; Grimalt, Joan O.; Cacho, Isabel
Palabras claveAlboran Sea
Coccolithophore productivity
Deglaciation
Last Glacial Maximum
Oxygen isotopes
SST
Fecha de publicación5-ene-2015
EditorElsevier
CitaciónPalaeogeography, Palaeoclimatology, Palaeoecology 418: 126-140 (2015)
ResumenCoccolithophore productivity and surface water dynamics for the last 25. kyr in the Alboran Sea (Western Mediterranean) are described in a study of high-resolution sedimentary records from two cores, HER-GC-T1 and CEUTA10PC08, whose locations are currently characterized by different hydrographic conditions. Fossil coccolithophore assemblages and oxygen isotopes and alkenone- and planktonic foraminifera-derived sea surface temperature (SST) records allowed a reconstruction of the properties of the inflowing Atlantic Water (AW), which have proved to be a primary control of the variations in productivity in the neighborhood of the Strait of Gibraltar. Other local factors, such as fluvial discharge, wind-induced and eddy-induced upwelling, are proposed to have influenced marine productivity in more distant areas. The entrance of cold and less saline AW during the stadials associated with Heinrich events 2 and 1 prevented primary productivity, which increased along the Last Glacial Maximum, probably due to a greater fluvial discharge. During Terminations 1a and 1b, the upper water column was affected by stratification, although wind-induced upwelling occurred locally. The Bølling-Allerød was characterized by a gradual increase in productivity and the development of the organic-rich layer. Two phases of the Younger Dryas are recognized: a first phase, which was colder, followed by a second phase, which was warmer and wetter. Differences in productivity between both locations during these two phases can be attributed to fluvial discharge and the changing properties of the AW. Local hydrography, such as the dynamics of the western anticyclonic gyre, gained greater importance in determining productivity and its variations during the Holocene, which was the most productive period. © 2014 Elsevier B.V.
Versión del editorhttp://dx.doi.org/10.1016/j.palaeo.2014.11.011
URIhttp://hdl.handle.net/10261/134873
DOI10.1016/j.palaeo.2014.11.011
Aparece en las colecciones: (IDAEA) Artículos
Ficheros en este ítem:
Fichero Descripción Tamaño Formato  
Tracking productivity and surface water dynamics in the Alboran Sea during the last 25 kyr.doc7,2 MBMicrosoft WordVisualizar/Abrir
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.