English   español  
Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/151768
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:

DC FieldValueLanguage
dc.contributor.authorHernández, Armandes_ES
dc.contributor.authorRull, Valentíes_ES
dc.contributor.authorRubio de Inglés, Maria Jesúses_ES
dc.contributor.authorSánchez-López, Guiomares_ES
dc.contributor.authorGiralt, Santiagoes_ES
dc.identifier.citationGlobal and Planetary Change, 154: 61-74 (2017)es_ES
dc.description.abstractThe location of the Azores Archipelago in the North Atlantic makes this group of islands an excellent setting to study the long-term behavior of large oceanic and atmospheric climate dynamic patterns, such as the Atlantic Multidecadal Oscillation (AMO) and the North Atlantic Oscillation (NAO). Here, we present the impacts of these patterns on Lake Empadadas (Azores Archipelago) from the Medieval Climate Anomaly (MCA) - Little Ice Age (LIA) transition to the present based on sedimentological, geochemical and biological characterizations of the sedimentary record. Multivariate analyses of a number of proxies including X-ray fluorescence (XRF), X-ray diffraction (XRD), total organic and inorganic carbon (TOC and TIC) and diatom life forms abundance reveal that the sedimentary infill evolution has been controlled by (i) fluctuations in the lake level and (ii) variations in organic matter accumulation. Both processes are governed by climate variability and modulated by anthropogenic activities associated with changes on the lake catchment. Changes in these two sedimentary processes have been used to infer five stages: (i) the MCA-LIA transition (ca. 1350–1450 CE) was characterized by a predominantly positive AMO phase, which led to intermediate lake levels and high organic matter concentration; (ii) the first half of the LIA (ca. 1450–1600 CE) was characterized by predominant lowstand conditions and intermediate organic matter deposition mainly related to negative AMO phases; (iii) the second half of the LIA (ca. 1600–1850 CE) was characterized by negative AMO and NAO phases, implying intermediate lake levels and high organic matter deposition; (iv) the Industrial era (ca. 1850–1980 CE) was characterized by the lowest lake level and organic matter accumulation associated with negative AMO phases; and (v) the period spanning between 1980 CE and the present reveals the highest lake levels and low organic matter deposition, being associated with very positive AMO conditions. At decadal-to-centennial scales, the influence of the AMO on Azorean climate plays a larger role than previously thought. In fact, the AMO appears to exert a stronger influence compared to the NAO, which is the main mode of climate variability at shorter time scales. © 2017 Elsevier B.V.es_ES
dc.description.sponsorshipThis work was financed by the Spanish Ministry of Economy and Competitiveness through the PaleoNAO project (CGL2010-15767/BTE) and the RapidNAO project (CGL2013-40608-R). Armand Hernández and Pedro Raposeiro were supported by the Portuguese Science Foundation (FCT) through a post-doctoral grant (SFRH/BPD/79923/2011 and SFRH/BPD/99461/2014, respectively). The support of the Generalitat de Catalunya to MERS (2014 SGR-1356) is also acknowledged.es_ES
dc.subjectClimate modeses_ES
dc.subjectOceanic Islandses_ES
dc.subjectLast millenniumes_ES
dc.titleThe influences of the AMO and NAO on the sedimentary infill in an Azores Archipelago lake since ca. 1350 CEes_ES
dc.description.peerreviewedPeer reviewedes_ES
dc.contributor.funderMinisterio de Economía y Competitividad (España)es_ES
dc.contributor.funderGeneralitat de Catalunyaes_ES
oprm.item.hasRevisionno ko 0 false*
Appears in Collections:(ICTJA) Artículos
Files in This Item:
File Description SizeFormat 
Rull_Global_and_Planetary_Change_154_61_preprint_digitalCSIC.pdf12,21 MBAdobe PDFThumbnail
Show simple item record

Related articles:

WARNING: Items in Digital.CSIC are protected by copyright, with all rights reserved, unless otherwise indicated.