Sea surface temperature reconstruction on three sediment profiles off Portugal ...

Sea Surface Temperature (SST), river discharge and biological productivity have been reconstructed from a multi-proxy study of a high-temporal-resolution sedimentary sequence recovered from the Tagus deposition center off Lisbon (Portugal) for the last 2000 years. SST shows 2 °C variability on a cen...

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Bibliographic Details
Main Authors: Abrantes, Fatima F, Lebreiro, Susana Martin, Rodrigues, Teresa, Gil, Isabelle M, Bartels-Jonsdottir, Helga B, Oliveira, Paulo, Kissel, Catherine, Grimalt, Joan O
Format: Article in Journal/Newspaper
Language:English
Published: PANGAEA 2005
Subjects:
Piston corer
Box corer
Gravity corer
D249
POS287
Discovery 1962
Poseidon
Planktonic foraminifera
Online Access:https://dx.doi.org/10.1594/pangaea.761853
https://doi.pangaea.de/10.1594/PANGAEA.761853
Description
Summary:Sea Surface Temperature (SST), river discharge and biological productivity have been reconstructed from a multi-proxy study of a high-temporal-resolution sedimentary sequence recovered from the Tagus deposition center off Lisbon (Portugal) for the last 2000 years. SST shows 2 °C variability on a century scale that allows the identification of the Medieval Warm Period (MWP) and the Little Ice Age (LIA).High Iron (Fe) and fine-sediment deposition accompanied by high n-alkane concentrations and presence of freshwater diatoms during the LIA (1300-1900 AD) (Science 292 (2001) 662) suggest augmented river discharge, whereas higher total-alkenone concentrations point to increased river-induced productivity. During the MWP (550-1300 AD) (Science 292 (2001) 662) larger mean-grain size and low values of magnetic susceptibility, and concentrations of Fe, n-alkanes, and n-alcohols are interpreted to reflect decreased runoff. At the same time, increased benthic and planktonic foraminifera abundances and presence of ... : Supplement to: Abrantes, Fatima F; Lebreiro, Susana Martin; Rodrigues, Teresa; Gil, Isabelle M; Bartels-Jonsdottir, Helga B; Oliveira, Paulo; Kissel, Catherine; Grimalt, Joan O (2005): Shallow-marine sediment cores record climate variability and earthquake activity off Lisbon (Portugal) for the last 2000 years. Quaternary Science Reviews, 24, 2477-2494 ...

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