Web of Science: 20 citations, Scopus: 21 citations, Google Scholar: citations,
Sea surface temperature variability in the central-western Mediterranean Sea during the last 2700 years : a multi-proxy and multi-record approach
Cisneros, Mercè (Universitat de Barcelona. Departament de Dinàmica de la Terra i de l'Oceà)
Cacho, Isabel (Universitat de Barcelona. Departament de Dinàmica de la Terra i de l'Oceà)
Frigola, J. (Universitat de Barcelona. Departament de Dinàmica de la Terra i de l'Oceà)
Canals Artigas, Miquel (Universitat de Barcelona. Departament de Dinàmica de la Terra i de l'Oceà)
Masqué Barri, Pere (Universitat Autònoma de Barcelona. Departament de Física)
Martrat, Belen (Institut de Diagnosi Ambiental i Estudis de l'Aigua)
Casado, Marta (Institut de Diagnosi Ambiental i Estudis de l'Aigua)
Grimalt, Joan O. (Institut de Diagnosi Ambiental i Estudis de l'Aigua)
Pena, Leopoldo D. (Universitat de Barcelona. Departament de Dinàmica de la Terra i de l'Oceà)
Margaritelli, Giulia (Istituto per l'Ambiente Marino Costiero)
Lirer, Fabrizio (Istituto per l'Ambiente Marino Costiero)

Date: 2016
Abstract: This study presents the reconstructed evolution of sea surface conditions in the central-western Mediterranean Sea during the late Holocene (2700 years) from a set of multi-proxy records as measured on five short sediment cores from two sites north of Minorca (cores MINMC06 and HERMC-MR3). Sea surface temperatures (SSTs) from alkenones and Globigerina bulloides Mg= Ca ratios are combined with δ18O measurements in order to reconstruct changes in the regional evaporation-precipitation (E-P) balance. We also revisit the G. bulloides Mg= Ca-SST calibration and readjusted it based on a set of core-top measurements from the western Mediterranean Sea. Modern regional oceanographic data indicate that Globigerina bulloides Mg= Ca is mainly controlled by seasonal spring SST conditions, related to the April-May primary productivity bloom in the region. In contrast, the alkenone-SST signal represents an integration of the annual signal. The construction of a robust chronological framework in the region allows for the synchronization of the different core sites and the construction of "stacked" proxy records in order to identify the most significant climatic variability patterns. The warmest sustained period occurred during the Roman Period (RP), which was immediately followed by a general cooling trend interrupted by several centennial-scale oscillations. We propose that this general cooling trend could be controlled by changes in the annual mean insolation. Even though some particularly warm SST intervals took place during the Medieval Climate Anomaly (MCA), the Little Ice Age (LIA) was markedly unstable, with some very cold SST events mostly during its second half. Finally, proxy records for the last centuries suggest that relatively low E-P ratios and cold SSTs dominated during negative North Atlantic Oscillation (NAO) phases, although SSTs seem to present a positive connection with the Atlantic Multidecadal Oscillation (AMO) index.
Note: Número d'acord de subvenció MINECO/CTM2014-59111-REDC
Note: Número d'acord de subvenció MINECO/CTM2013-48639-C2-1-R
Note: Número d'acord de subvenció MINECO/RYC-2013-14073
Note: Número d'acord de subvenció AGAUR/2009/SGR-1305
Note: Unidad de excelencia María de Maeztu MdM-2015-0552
Rights: Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original. Creative Commons
Language: Anglès.
Document: article ; recerca ; publishedVersion
Published in: Climate of the past, Vol. 12, issue 4 (April 2016) , p. 849-869, ISSN 1814-9324

DOI: 10.5194/cp-12-849-2016


21 p, 9.7 MB

The record appears in these collections:
Research literature > UAB research groups literature > Research Centres and Groups (scientific output) > Experimental sciences > Institut de Ciència i Tecnologia Ambientals (ICTA)
Articles > Research articles
Articles > Published articles

 Record created 2018-03-02, last modified 2020-02-08



   Favorit i Compartir