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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Format: | Dataset |
Language: | English |
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PANGAEA
2005
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Online Access: | https://doi.pangaea.de/10.1594/PANGAEA.761853 https://doi.org/10.1594/PANGAEA.761853 |
id |
ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.761853 |
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record_format |
openpolar |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
BC Box corer D13902 D249 Discovery (1962) GC Gravity corer PALEO 1 PC Piston corer Portuguese Margin POS287 POS287_26-1B POS287_26-3G Poseidon |
spellingShingle |
BC Box corer D13902 D249 Discovery (1962) GC Gravity corer PALEO 1 PC Piston corer Portuguese Margin POS287 POS287_26-1B POS287_26-3G Poseidon Abrantes, Fatima F Lebreiro, Susana Martin Rodrigues, Teresa Gil, Isabelle M Bartels-Jonsdottir, Helga B Oliveira, Paulo Kissel, Catherine Grimalt, Joan O Sea surface temperature reconstruction on three sediment profiles off Portugal |
topic_facet |
BC Box corer D13902 D249 Discovery (1962) GC Gravity corer PALEO 1 PC Piston corer Portuguese Margin POS287 POS287_26-1B POS287_26-3G Poseidon |
description |
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 upwelling related diatoms point to increased oceanic productivity. On the basis of the excellent match found between the negative phases of the North Atlantic Oscillation (NAO) index and the intensified Tagus River discharge observed for the last century, it is hypothesized that the increased influx of terrigenous material during the LIA reflects a negative NAO-like state or the occurrence of frequent extreme NAO minima. During the milder few centuries of the MWP, stronger coastal upwelling conditions are attributed to a persistent, positive NAO-like state or the frequent occurrence of extreme NAO maxima. The peak in magnetic susceptibility, centered at 90 cm composite core depth (ccd), is interpreted as the result of the well-known 1755 AD Lisbon earthquake. The Lisbon earthquake and accompanying tsunami are estimated to have caused the loss of 39 cm of sediment (355 years of record-most of the LIA) and the instantaneous deposition of a 19-cm sediment bed. |
format |
Dataset |
author |
Abrantes, Fatima F Lebreiro, Susana Martin Rodrigues, Teresa Gil, Isabelle M Bartels-Jonsdottir, Helga B Oliveira, Paulo Kissel, Catherine Grimalt, Joan O |
author_facet |
Abrantes, Fatima F Lebreiro, Susana Martin Rodrigues, Teresa Gil, Isabelle M Bartels-Jonsdottir, Helga B Oliveira, Paulo Kissel, Catherine Grimalt, Joan O |
author_sort |
Abrantes, Fatima F |
title |
Sea surface temperature reconstruction on three sediment profiles off Portugal |
title_short |
Sea surface temperature reconstruction on three sediment profiles off Portugal |
title_full |
Sea surface temperature reconstruction on three sediment profiles off Portugal |
title_fullStr |
Sea surface temperature reconstruction on three sediment profiles off Portugal |
title_full_unstemmed |
Sea surface temperature reconstruction on three sediment profiles off Portugal |
title_sort |
sea surface temperature reconstruction on three sediment profiles off portugal |
publisher |
PANGAEA |
publishDate |
2005 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.761853 https://doi.org/10.1594/PANGAEA.761853 |
op_coverage |
MEDIAN LATITUDE: 38.557460 * MEDIAN LONGITUDE: -9.356000 * SOUTH-BOUND LATITUDE: 38.554000 * WEST-BOUND LONGITUDE: -9.364500 * NORTH-BOUND LATITUDE: 38.560000 * EAST-BOUND LONGITUDE: -9.335500 * DATE/TIME START: 2000-09-01T00:00:00 * DATE/TIME END: 2002-04-29T10:08:00 |
long_lat |
ENVELOPE(-9.364500,-9.335500,38.560000,38.554000) |
genre |
North Atlantic North Atlantic oscillation Planktonic foraminifera |
genre_facet |
North Atlantic North Atlantic oscillation Planktonic foraminifera |
op_source |
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, https://doi.org/10.1016/j.quascirev.2004.04.009 |
op_relation |
Rodrigues, Teresa; Grimalt, Joan O; Abrantes, Fatima F; Flores, José-Abel; Lebreiro, Susana Martin (2009): Holocene interdependences of changes in sea surface temperature, productivity, and fluvial inputs in the Iberian continental shelf (Tagus mud patch). Geochemistry, Geophysics, Geosystems, 10(7), Q07U06, https://doi.org/10.1029/2008GC002367 https://doi.pangaea.de/10.1594/PANGAEA.761853 https://doi.org/10.1594/PANGAEA.761853 |
op_rights |
CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1594/PANGAEA.761853 https://doi.org/10.1016/j.quascirev.2004.04.009 https://doi.org/10.1029/2008GC002367 |
_version_ |
1766136749965180928 |
spelling |
ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.761853 2023-05-15T17:37:02+02:00 Sea surface temperature reconstruction on three sediment profiles off Portugal Abrantes, Fatima F Lebreiro, Susana Martin Rodrigues, Teresa Gil, Isabelle M Bartels-Jonsdottir, Helga B Oliveira, Paulo Kissel, Catherine Grimalt, Joan O MEDIAN LATITUDE: 38.557460 * MEDIAN LONGITUDE: -9.356000 * SOUTH-BOUND LATITUDE: 38.554000 * WEST-BOUND LONGITUDE: -9.364500 * NORTH-BOUND LATITUDE: 38.560000 * EAST-BOUND LONGITUDE: -9.335500 * DATE/TIME START: 2000-09-01T00:00:00 * DATE/TIME END: 2002-04-29T10:08:00 2005-06-20 application/zip, 4 datasets https://doi.pangaea.de/10.1594/PANGAEA.761853 https://doi.org/10.1594/PANGAEA.761853 en eng PANGAEA Rodrigues, Teresa; Grimalt, Joan O; Abrantes, Fatima F; Flores, José-Abel; Lebreiro, Susana Martin (2009): Holocene interdependences of changes in sea surface temperature, productivity, and fluvial inputs in the Iberian continental shelf (Tagus mud patch). Geochemistry, Geophysics, Geosystems, 10(7), Q07U06, https://doi.org/10.1029/2008GC002367 https://doi.pangaea.de/10.1594/PANGAEA.761853 https://doi.org/10.1594/PANGAEA.761853 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY 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, https://doi.org/10.1016/j.quascirev.2004.04.009 BC Box corer D13902 D249 Discovery (1962) GC Gravity corer PALEO 1 PC Piston corer Portuguese Margin POS287 POS287_26-1B POS287_26-3G Poseidon Dataset 2005 ftpangaea https://doi.org/10.1594/PANGAEA.761853 https://doi.org/10.1016/j.quascirev.2004.04.009 https://doi.org/10.1029/2008GC002367 2023-01-20T07:32:12Z 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 upwelling related diatoms point to increased oceanic productivity. On the basis of the excellent match found between the negative phases of the North Atlantic Oscillation (NAO) index and the intensified Tagus River discharge observed for the last century, it is hypothesized that the increased influx of terrigenous material during the LIA reflects a negative NAO-like state or the occurrence of frequent extreme NAO minima. During the milder few centuries of the MWP, stronger coastal upwelling conditions are attributed to a persistent, positive NAO-like state or the frequent occurrence of extreme NAO maxima. The peak in magnetic susceptibility, centered at 90 cm composite core depth (ccd), is interpreted as the result of the well-known 1755 AD Lisbon earthquake. The Lisbon earthquake and accompanying tsunami are estimated to have caused the loss of 39 cm of sediment (355 years of record-most of the LIA) and the instantaneous deposition of a 19-cm sediment bed. Dataset North Atlantic North Atlantic oscillation Planktonic foraminifera PANGAEA - Data Publisher for Earth & Environmental Science ENVELOPE(-9.364500,-9.335500,38.560000,38.554000) |