Articles | Volume 15, issue 2
https://doi.org/10.5194/cp-15-617-2019
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Special issue:
https://doi.org/10.5194/cp-15-617-2019
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Multi-decadal atmospheric and marine climate variability in southern Iberia during the mid- to late-Holocene
Julien Schirrmacher
CORRESPONDING AUTHOR
CRC 1266, Christian-Albrechts-Universität, Kiel, 24118, Germany
Leibniz-Laboratory for Radiometric Dating and Stable Isotope Research,
Christian-Albrechts-Universität, Kiel, 24118, Germany
Mara Weinelt
CRC 1266, Christian-Albrechts-Universität, Kiel, 24118, Germany
Thomas Blanz
Department of Geosciences, Christian-Albrechts-Universität, Kiel,
24118, Germany
Nils Andersen
Leibniz-Laboratory for Radiometric Dating and Stable Isotope Research,
Christian-Albrechts-Universität, Kiel, 24118, Germany
Emília Salgueiro
Div. Geologia e Georecursos Marinhos, Instituto Português do Mar e
da Atmosfera (IPMA), Lisbon, 1749-077, Portugal
CCMAR, Centro de Ciências do Mar, Universidade do Algarve, Campus
de Gambelas, 8005-139 Faro, Portugal
Ralph R. Schneider
CRC 1266, Christian-Albrechts-Universität, Kiel, 24118, Germany
Leibniz-Laboratory for Radiometric Dating and Stable Isotope Research,
Christian-Albrechts-Universität, Kiel, 24118, Germany
Department of Geosciences, Christian-Albrechts-Universität, Kiel,
24118, Germany
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Aline Martins Mega, Teresa Rodrigues, Emilia Salgueiro, Maria Padilha, Henning Kuhnert, and Antje H. L. Voelker
EGUsphere, https://doi.org/10.5194/egusphere-2024-3185, https://doi.org/10.5194/egusphere-2024-3185, 2024
This preprint is open for discussion and under review for Climate of the Past (CP).
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Our research explores climatic changes during the Early-Middle Pleistocene (1006–750 kilo years) on the southern Portuguese margin. We found that warm, subtropical gyre related conditions dominated. However, those conditions were occasionally interrupted by extreme cold events during the glacial periods. Our data shows that these cold events, linked to changes in the North Atlantic’s circulation, reached as far south as 36° N and significantly impacting marine ecosystems in the surface ocean.
Raphaël Hubert-Huard, Nils Andersen, Helge W. Arz, Werner Ehrmann, and Gerhard Schmiedl
Clim. Past, 20, 267–280, https://doi.org/10.5194/cp-20-267-2024, https://doi.org/10.5194/cp-20-267-2024, 2024
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We have studied the geochemistry of benthic foraminifera (micro-fossils) from a sediment core from the Red Sea. Our data show that the circulation and carbon cycling of the Red Sea during the last glacial period responded to high-latitude millennial-scale climate variability and to the orbital influence of the African–Indian monsoon system. This implies a sensitive response of the Red Sea to climate changes.
Clara T. Bolton, Emmeline Gray, Wolfgang Kuhnt, Ann E. Holbourn, Julia Lübbers, Katharine Grant, Kazuyo Tachikawa, Gianluca Marino, Eelco J. Rohling, Anta-Clarisse Sarr, and Nils Andersen
Clim. Past, 18, 713–738, https://doi.org/10.5194/cp-18-713-2022, https://doi.org/10.5194/cp-18-713-2022, 2022
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The timing of the initiation and evolution of the South Asian monsoon in the geological past is a subject of debate. Here, we present a new age model spanning the late Miocene (9 to 5 million years ago) and high-resolution records of past open-ocean biological productivity from the equatorial Indian Ocean that we interpret to reflect monsoon wind strength. Our data show no long-term intensification; however, strong orbital periodicities suggest insolation forcing of monsoon wind strength.
Annalena A. Lochte, Ralph Schneider, Markus Kienast, Janne Repschläger, Thomas Blanz, Dieter Garbe-Schönberg, and Nils Andersen
Clim. Past, 16, 1127–1143, https://doi.org/10.5194/cp-16-1127-2020, https://doi.org/10.5194/cp-16-1127-2020, 2020
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The Labrador Sea is important for the modern global thermohaline circulation system through the formation of Labrador Sea Water. However, the role of the southward flowing Labrador Current in Labrador Sea convection is still debated. In order to better assess its role in deep-water formation and climate variability, we present high-resolution mid- to late Holocene records of sea surface and bottom water temperatures, freshening, and sea ice cover on the Labrador Shelf during the last 6000 years.
Kristin Doering, Claudia Ehlert, Philippe Martinez, Martin Frank, and Ralph Schneider
Biogeosciences, 16, 2163–2180, https://doi.org/10.5194/bg-16-2163-2019, https://doi.org/10.5194/bg-16-2163-2019, 2019
Blanca Ausín, Diana Zúñiga, Jose A. Flores, Catarina Cavaleiro, María Froján, Nicolás Villacieros-Robineau, Fernando Alonso-Pérez, Belén Arbones, Celia Santos, Francisco de la Granda, Carmen G. Castro, Fátima Abrantes, Timothy I. Eglinton, and Emilia Salgueiro
Biogeosciences, 15, 245–262, https://doi.org/10.5194/bg-15-245-2018, https://doi.org/10.5194/bg-15-245-2018, 2018
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A systematic investigation of the coccolithophore ecology was performed for the first time in the NW Iberian Margin to broaden our knowledge on the use of fossil coccoliths in marine sediment records to infer environmental conditions in the past. Coccolithophores proved to be significant primary producers and their abundance and distribution was favoured by warmer and nutrient–depleted waters during the upwelling regime, seasonally controlled offshore and influenced by coastal processes onshore.
Fátima Abrantes, Teresa Rodrigues, Marta Rufino, Emília Salgueiro, Dulce Oliveira, Sandra Gomes, Paulo Oliveira, Ana Costa, Mário Mil-Homens, Teresa Drago, and Filipa Naughton
Clim. Past, 13, 1901–1918, https://doi.org/10.5194/cp-13-1901-2017, https://doi.org/10.5194/cp-13-1901-2017, 2017
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Reconstructions of the last 2000-year climatic conditions along the Iberian Margin, a vulnerable region regarding current global warming, reveal a long-term cooling in sea surface temperature (SST) ending with the 19th century and centennial-scale variability that exposes warm SSTs throughout the first 1300 years followed by the colder Little Ice Age. The Industrial Era starts by 1800 CE, with an SST rise and a second increase in SST at ca. 1970 CE, particularly marked in the southern region.
Janne Repschläger, Dieter Garbe-Schönberg, Mara Weinelt, and Ralph Schneider
Clim. Past, 13, 333–344, https://doi.org/10.5194/cp-13-333-2017, https://doi.org/10.5194/cp-13-333-2017, 2017
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We reconstruct changes in the warm water transport from the subtropical to the subpolar North Atlantic over the last 10 000 years. We use stable isotope and Mg / Ca ratios measured on surface and subsurface dwelling foraminifera. Results indicate an overall stable warm water transport at surface. The northward transport at subsurface evolves stepwise and stabilizes at 7 ka BP on the modern mode. These ocean transport changes seem to be controlled by the meltwater inflow into the North Atlantic.
Fátima Abrantes, Teresa Rodrigues, Marta Rufino, Emília Salgueiro, Dulce Oliveira, Sandra Gomes, Paulo Oliveira, Ana Costa, Mário Mil-Homens, Teresa Drago, and Filipa Naughton
Clim. Past Discuss., https://doi.org/10.5194/cp-2017-39, https://doi.org/10.5194/cp-2017-39, 2017
Manuscript not accepted for further review
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This work presents proxy reconstructions of the last 2000 yr climatic conditions along the eastern Margin of the Iberian Peninsula, a vulnerable region regarding current global warming. Sea Surface Temperature shows a long-term cooling ending with the 19th century, and centennial scale variability that exposes 1300 yr of warm conditions, up to the end of the Medieval Warm Period (MWP), followed by a 1 ºC colder Little Ice Age. The Industrial Era starts by 1800 CE with a rise to MWP values.
Diana Zúñiga, Celia Santos, María Froján, Emilia Salgueiro, Marta M. Rufino, Francisco De la Granda, Francisco G. Figueiras, Carmen G. Castro, and Fátima Abrantes
Biogeosciences, 14, 1165–1179, https://doi.org/10.5194/bg-14-1165-2017, https://doi.org/10.5194/bg-14-1165-2017, 2017
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Diatoms are one of the most important primary producers in highly productive coastal regions. Their silicified valves are susceptible to escape from the upper water column and be preserved in the sediment record, and thus are frequently used to reconstruct environmental conditions in the past from sediment cores. Here, we assess how water column diatom’s community in the NW Iberian coastal upwelling system is seasonally transferred from the surface to the seafloor sediments.
Meike Becker, Nils Andersen, Helmut Erlenkeuser, Matthew P. Humphreys, Toste Tanhua, and Arne Körtzinger
Earth Syst. Sci. Data, 8, 559–570, https://doi.org/10.5194/essd-8-559-2016, https://doi.org/10.5194/essd-8-559-2016, 2016
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The stable carbon isotope composition of dissolved inorganic carbon (δ13C-DIC) can be used to quantify fluxes within the marine carbon system such as the exchange between ocean and atmosphere or the amount of anthropogenic carbon in the water column. In this study, an internally consistent δ13C-DIC dataset for the North Atlantic is presented. The data have undergone a secondary quality control during which systematic biases between the respective cruises have been quantified and adjusted.
T. Larsen, L. T. Bach, R. Salvatteci, Y. V. Wang, N. Andersen, M. Ventura, and M. D. McCarthy
Biogeosciences, 12, 4979–4992, https://doi.org/10.5194/bg-12-4979-2015, https://doi.org/10.5194/bg-12-4979-2015, 2015
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A tiny fraction of marine algae escapes decomposition and is buried in sediments. Since tools are needed to track the fate of algal organic carbon, we tested whether naturally occurring isotope variability among amino acids from algae and bacteria can be used as source diagnostic fingerprints. We found that isotope fingerprints track algal amino acid sources with high fidelity across different growth conditions, and that the fingerprints can be used to quantify bacterial amino acids in sediment.
Related subject area
Subject: Atmospheric Dynamics | Archive: Marine Archives | Timescale: Holocene
Signals of Holocene climate transition amplified by anthropogenic land-use changes in the westerly–Indian monsoon realm
Glacial to interglacial climate variability in the southeastern African subtropics (25–20° S)
Extreme storms during the last 6500 years from lagoonal sedimentary archives in the Mar Menor (SE Spain)
Changes in East Asian summer monsoon precipitation during the Holocene deduced from a freshwater flux reconstruction of the Changjiang (Yangtze River) based on the oxygen isotope mass balance in the northern East China Sea
Tracking atmospheric and riverine terrigenous supplies variability during the last glacial and the Holocene in central Mediterranean
Holocene evolution of summer winds and marine productivity in the tropical Indian Ocean in response to insolation forcing: data-model comparison
Nicole Burdanowitz, Tim Rixen, Birgit Gaye, and Kay-Christian Emeis
Clim. Past, 17, 1735–1749, https://doi.org/10.5194/cp-17-1735-2021, https://doi.org/10.5194/cp-17-1735-2021, 2021
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To study the interaction of the westerlies and Indian summer monsoon (ISM) during the Holocene, we used paleoenvironmental reconstructions using a sediment core from the northeast Arabian Sea. We found a climatic transition period between 4.6 and 3 ka BP during which the ISM shifted southwards and the influence of Westerlies became prominent. Our data indicate a stronger influence of agriculture activities and enhanced soil erosion, adding to Bond event impact after this transition period.
Annette Hahn, Enno Schefuß, Jeroen Groeneveld, Charlotte Miller, and Matthias Zabel
Clim. Past, 17, 345–360, https://doi.org/10.5194/cp-17-345-2021, https://doi.org/10.5194/cp-17-345-2021, 2021
Laurent Dezileau, Angel Pérez-Ruzafa, Philippe Blanchemanche, Jean-Philippe Degeai, Otmane Raji, Philippe Martinez, Concepcion Marcos, and Ulrich Von Grafenstein
Clim. Past, 12, 1389–1400, https://doi.org/10.5194/cp-12-1389-2016, https://doi.org/10.5194/cp-12-1389-2016, 2016
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Amongst the most devastating marine catastrophes that can occur in coastal areas are storms and tsunamis, which may seriously endanger human society. In a sediment core from the Mar Menor (SE Spain), we discovered eight coarse-grained layers which document marine incursions during periods of intense storm activity or tsunami events. These periods of surge events seem to coincide with the coldest periods in Europe during the late Holocene, suggesting a control by a climatic mechanism.
Y. Kubota, R. Tada, and K. Kimoto
Clim. Past, 11, 265–281, https://doi.org/10.5194/cp-11-265-2015, https://doi.org/10.5194/cp-11-265-2015, 2015
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Clim. Past, 9, 1065–1087, https://doi.org/10.5194/cp-9-1065-2013, https://doi.org/10.5194/cp-9-1065-2013, 2013
F. C. Bassinot, C. Marzin, P. Braconnot, O. Marti, E. Mathien-Blard, F. Lombard, and L. Bopp
Clim. Past, 7, 815–829, https://doi.org/10.5194/cp-7-815-2011, https://doi.org/10.5194/cp-7-815-2011, 2011
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