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  1. Article ; Online: Eutrophication and Deoxygenation Forcing of Marginal Marine Organic Carbon Burial During the PETM.

    Papadomanolaki, Nina M / Sluijs, Appy / Slomp, Caroline P

    Paleoceanography and paleoclimatology

    2022  Volume 37, Issue 3, Page(s) e2021PA004232

    Abstract: The Paleocene-Eocene Thermal Maximum (PETM) is recognized globally by a negative excursion in stable carbon isotope ratios ( ... ...

    Abstract The Paleocene-Eocene Thermal Maximum (PETM) is recognized globally by a negative excursion in stable carbon isotope ratios (δ
    Language English
    Publishing date 2022-03-03
    Publishing country United States
    Document type Journal Article
    ISSN 2572-4525
    ISSN (online) 2572-4525
    DOI 10.1029/2021PA004232
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  2. Article: Detrital Carbonate Minerals in Earth's Element Cycles.

    Müller, Gerrit / Börker, Janine / Sluijs, Appy / Middelburg, Jack J

    Global biogeochemical cycles

    2022  Volume 36, Issue 5, Page(s) e2021GB007231

    Abstract: We investigate if the commonly neglected riverine detrital carbonate fluxes might reconciliate several chemical mass balances of the global ocean. Particulate inorganic carbon (PIC) concentrations in riverine suspended sediments, that is, carbon ... ...

    Abstract We investigate if the commonly neglected riverine detrital carbonate fluxes might reconciliate several chemical mass balances of the global ocean. Particulate inorganic carbon (PIC) concentrations in riverine suspended sediments, that is, carbon contained by these detrital carbonate minerals, were quantified at the basin and global scale. Our approach is based on globally representative data sets of riverine suspended sediment composition, catchment properties, and a two-step regression procedure. The present-day global riverine PIC flux is estimated at 3.1 ± 0.3 Tmol C/y (13% of total inorganic carbon export and 4% of total carbon export) with a flux-weighted mean concentration of 0.26 ± 0.03 wt%. The flux prior to damming was 4.1 ± 0.5 Tmol C/y. PIC fluxes are concentrated in limestone-rich, rather dry and mountainous catchments of large rivers near Arabia, South East Asia, and Europe with 2.2 Tmol C/y (67.6%) discharged between 15°N and 45°N. Greenlandic and Antarctic meltwater discharge and ice-rafting additionally contribute 0.8 ± 0.3 Tmol C/y. This amount of detrital carbonate minerals annually discharged into the ocean implies a significant contribution of calcium (∼4.75 Tmol Ca/y) and alkalinity fluxes (∼10 Tmol (eq)/y) to marine mass balances and moderate inputs of strontium (∼5 Gmol Sr/y) based on undisturbed riverine and cryospheric inputs and a dolomite/calcite ratio of 0.1. Magnesium fluxes (∼0.25 Tmol Mg/y), mostly hosted by less-soluble dolomite, are rather negligible. These unaccounted fluxes help in elucidating respective marine mass balances and potentially alter conclusions based on these budgets.
    Language English
    Publishing date 2022-05-17
    Publishing country United States
    Document type Journal Article
    ZDB-ID 2021601-4
    ISSN 1944-9224 ; 0886-6236
    ISSN (online) 1944-9224
    ISSN 0886-6236
    DOI 10.1029/2021GB007231
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  3. Article: Towards quantitative environmental reconstructions from ancient non-analogue microfossil assemblages: Ecological preferences of Paleocene – Eocene dinoflagellates

    Frieling, Joost / Sluijs, Appy

    Earth-science reviews. 2018 Oct., v. 185

    2018  

    Abstract: We explore a novel approach towards quantification of paleo-ecological signals from non-analogue microfossil assemblages by quantifying relations between assemblages and high-quality geochemical and sedimentological data from sedimentary archives. We ... ...

    Abstract We explore a novel approach towards quantification of paleo-ecological signals from non-analogue microfossil assemblages by quantifying relations between assemblages and high-quality geochemical and sedimentological data from sedimentary archives. We test this approach using one group of microfossils, the organic cysts of dinoflagellates (dinocysts), which are widely used in shelf and open marine settings for biostratigraphy and reconstructions of past environments and environmental change. Similar to other microfossil groups, dinocysts can be used to reconstruct environments with relatively high confidence for recent time periods, as species affinities can be derived from observational and instrumental data. In the absence of such data, the ecology of extinct species is much less certain and as a result reconstructions in deep time are often limited to qualitative interpretations.To explore if quantitative empirical relations between extinct dinocysts and high-quality geochemical data can be established, we study a major event of climate change, the Paleocene-Eocene Thermal Maximum (PETM; ~56 Ma ago). The PETM is a particularly suitable period for this exercise as there is a multitude of large environmental perturbations associated with the transient global warming, such as deoxygenation, sea level rise and an accelerated hydrological cycle. The synthesized published dataset exhibits better spatial and temporal coverage compared to any other period in deep time. We extract empirical relations for the abundance of previously proposed paleoecological groups as a function of independent environmental proxies for example, sea surface temperature and terrestrial organic matter input.The results unequivocally illustrate that many dinocysts show relations to several of the reconstructed environmental variables. Notably, we show that one genus (Apectodinium) and an ecogroup (epicystal Goniodomidae) required sea surface temperatures in excess of 20 °C, and 25 °C, respectively, while one species (Florentinia reichartii) was only abundant between 30 and 35 °C. Other groups apparently favored either a limited (Spiniferites) or high (Senegalinium) terrestrial input to the study site, relating to salinity, nutrient levels or suspended sediment load (i.e. murkiness).Crucially, our work shows that the validation and quantification of ecological signals by independent environmental proxy data provides the opportunity to extract more quantitative information from a wide range of (non-analogue) microfossil assemblages. While this approach is not limited to any specific group of microfossils (or macrofossils), we stress that proper calibration datasets, high-quality sedimentological and geochemical proxy records, are needed and should ideally have decent geographical coverage and include one or more environmental perturbations. Using this approach such empirical relations can be established for a wide range of microfossil groups that have highly complementary geological records, which increases the value of existing data and ensures future application of microfossil-based paleoecology.
    Keywords Eocene epoch ; Miozoa ; Paleocene epoch ; biostratigraphy ; data collection ; environmental factors ; extinct species ; global warming ; hydrologic cycle ; microfossils ; nutrient content ; organic matter ; paleoecology ; pollution load ; salinity ; sea level ; sediment yield ; surface water temperature ; suspended sediment
    Language English
    Dates of publication 2018-10
    Size p. 956-973.
    Publishing place Elsevier B.V.
    Document type Article
    ZDB-ID 1792-9
    ISSN 0012-8252
    ISSN 0012-8252
    DOI 10.1016/j.earscirev.2018.08.014
    Database NAL-Catalogue (AGRICOLA)

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    In stock of ZB MED Bonn / Germany

    Z 69/92: Show issues

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  4. Article: Limited Lateral Transport Bias During Export of Sea Surface Temperature Proxy Carriers in the Mediterranean Sea.

    Rice, Addison / Nooteboom, Peter D / van Sebille, Erik / Peterse, Francien / Ziegler, Martin / Sluijs, Appy

    Geophysical research letters

    2022  Volume 49, Issue 4, Page(s) e2021GL096859

    Abstract: Some lipid-biomarker-based sea surface temperature (SST) proxies applied in the modern Mediterranean Sea exhibit large offsets from expected values, generating uncertainties in climate reconstructions. Lateral transport of proxy carriers along ocean ... ...

    Abstract Some lipid-biomarker-based sea surface temperature (SST) proxies applied in the modern Mediterranean Sea exhibit large offsets from expected values, generating uncertainties in climate reconstructions. Lateral transport of proxy carriers along ocean currents prior to burial can contribute to this offset between reconstructed and expected SSTs. We perform virtual particle tracking experiments to simulate transport prior to and during sinking and derive a quantitative estimate of transport bias for alkenones and glycerol dibiphytanyl glycerol tetraethers (GDGTs), which form the basis of the U
    Language English
    Publishing date 2022-02-23
    Publishing country United States
    Document type Journal Article
    ZDB-ID 7403-2
    ISSN 0094-8276
    ISSN 0094-8276
    DOI 10.1029/2021GL096859
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    In stock of ZB MED Bonn / Germany

    Z 2000/712: Show issues

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  5. Article: Enhanced clay formation key in sustaining the Middle Eocene Climatic Optimum.

    Krause, Alexander J / Sluijs, Appy / van der Ploeg, Robin / Lenton, Timothy M / Pogge von Strandmann, Philip A E

    Nature geoscience

    2023  Volume 16, Issue 8, Page(s) 730–738

    Abstract: The Middle Eocene Climatic Optimum (around 40 million years ago) was a roughly 400,000-year-long global warming phase associated with an increase in atmospheric ... ...

    Abstract The Middle Eocene Climatic Optimum (around 40 million years ago) was a roughly 400,000-year-long global warming phase associated with an increase in atmospheric CO
    Language English
    Publishing date 2023-07-31
    Publishing country England
    Document type Journal Article
    ZDB-ID 2396648-8
    ISSN 1752-0908 ; 1752-0894
    ISSN (online) 1752-0908
    ISSN 1752-0894
    DOI 10.1038/s41561-023-01234-y
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  6. Article ; Online: Reconciling Southern Ocean fronts equatorward migration with minor Antarctic ice volume change during Miocene cooling.

    Hou, Suning / Stap, Lennert B / Paul, Ryan / Nelissen, Mei / Hoem, Frida S / Ziegler, Martin / Sluijs, Appy / Sangiorgi, Francesca / Bijl, Peter K

    Nature communications

    2023  Volume 14, Issue 1, Page(s) 7230

    Abstract: Gradual climate cooling and ... ...

    Abstract Gradual climate cooling and CO
    Language English
    Publishing date 2023-11-09
    Publishing country England
    Document type Journal Article
    ZDB-ID 2553671-0
    ISSN 2041-1723 ; 2041-1723
    ISSN (online) 2041-1723
    ISSN 2041-1723
    DOI 10.1038/s41467-023-43106-4
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  7. Article: Erratum: Publisher Correction: Enhanced clay formation key in sustaining the Middle Eocene Climatic Optimum.

    Krause, Alexander J / Sluijs, Appy / van der Ploeg, Robin / Lenton, Timothy M / Pogge von Strandmann, Philip A E

    Nature geoscience

    2023  Volume 17, Issue 1, Page(s) 104

    Abstract: This corrects the article DOI: 10.1038/s41561-023-01234-y.]. ...

    Abstract [This corrects the article DOI: 10.1038/s41561-023-01234-y.].
    Language English
    Publishing date 2023-09-07
    Publishing country England
    Document type Published Erratum
    ZDB-ID 2396648-8
    ISSN 1752-0908 ; 1752-0894
    ISSN (online) 1752-0908
    ISSN 1752-0894
    DOI 10.1038/s41561-023-01280-6
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  8. Book ; Online: Single-species dinoflagellate cyst carbon isotope fractionation in core-top sediments

    Frieling, Joost / Roij, Linda / Kleij, Iris / Reichart, Gert-Jan / Sluijs, Appy

    eISSN: 1726-4189

    environmental controls, CO2 dependency and proxy potential

    2023  

    Abstract: Sedimentary bulk organic matter and various molecular organic components exhibit strong CO 2 -dependent carbon isotope fractionation relative to dissolved inorganic carbon sources. This fractionation ( ε p ) has been employed as a proxy for paleo- p CO 2 ...

    Abstract Sedimentary bulk organic matter and various molecular organic components exhibit strong CO 2 -dependent carbon isotope fractionation relative to dissolved inorganic carbon sources. This fractionation ( ε p ) has been employed as a proxy for paleo- p CO 2 . Yet, culture experiments indicate that CO 2 -dependent ε p is highly specific at genus and even species level, potentially hampering the use of bulk organic matter and non-species-specific organic compounds. In recent years, significant progress has been made towards a CO 2 proxy using controlled growth experiments with dinoflagellate species, also showing highly species-specific ε p values. These values were, however, based on motile specimens, and it remains unknown whether these relations also hold for the organic-walled resting cysts (dinocysts) produced by these dinoflagellate species in their natural environment. We here analyze dinocysts isolated from core tops from the Atlantic Ocean and Mediterranean Sea, representing several species ( Spiniferites elongatus , S. (cf.) ramosus , S. mirabilis , Operculodinium centrocarpum sensu Wall and Dale (1966) (hereafter referred to as O. centrocarpum ) and Impagidinium aculeatum ) using laser ablation–nano-combustion–gas-chromatography–isotope ratio mass spectrometry (LA/nC/GC-IRMS). We find that the dinocysts produced in the natural environment are all appreciably more 13 C-depleted compared to the cultured motile dinoflagellate cells, implying higher overall ε p values, and, moreover, exhibit large isotope variability. Where several species could be analyzed from a single location, we often record significant differences in isotopic variance and offsets in mean δ 13 C values between species, highlighting the importance of single-species carbon isotope analyses. The most geographically expanded dataset, based on O. centrocarpum , shows that ε p correlates significantly with various environmental parameters. Importantly, O. centrocarpum shows a CO 2 -dependent ε p above ∼ 240 µ atm p CO 2 . Similar to other ...
    Subject code 511 ; 333
    Language English
    Publishing date 2023-11-27
    Publishing country de
    Document type Book ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  9. Article ; Online: Towards quantitative environmental reconstructions from ancient non-analogue microfossil assemblages

    Frieling, Joost / Sluijs, Appy

    Ecological preferences of Paleocene – Eocene dinoflagellates

    2018  

    Abstract: We explore a novel approach towards quantification of paleo-ecological signals from non-analogue microfossil assemblages by quantifying relations between assemblages and high-quality geochemical and sedimentological data from sedimentary archives. We ... ...

    Abstract We explore a novel approach towards quantification of paleo-ecological signals from non-analogue microfossil assemblages by quantifying relations between assemblages and high-quality geochemical and sedimentological data from sedimentary archives. We test this approach using one group of microfossils, the organic cysts of dinoflagellates (dinocysts), which are widely used in shelf and open marine settings for biostratigraphy and reconstructions of past environments and environmental change. Similar to other microfossil groups, dinocysts can be used to reconstruct environments with relatively high confidence for recent time periods, as species affinities can be derived from observational and instrumental data. In the absence of such data, the ecology of extinct species is much less certain and as a result reconstructions in deep time are often limited to qualitative interpretations. To explore if quantitative empirical relations between extinct dinocysts and high-quality geochemical data can be established, we study a major event of climate change, the Paleocene-Eocene Thermal Maximum (PETM; ~56 Ma ago). The PETM is a particularly suitable period for this exercise as there is a multitude of large environmental perturbations associated with the transient global warming, such as deoxygenation, sea level rise and an accelerated hydrological cycle. The synthesized published dataset exhibits better spatial and temporal coverage compared to any other period in deep time. We extract empirical relations for the abundance of previously proposed paleoecological groups as a function of independent environmental proxies for example, sea surface temperature and terrestrial organic matter input. The results unequivocally illustrate that many dinocysts show relations to several of the reconstructed environmental variables. Notably, we show that one genus (Apectodinium) and an ecogroup (epicystal Goniodomidae) required sea surface temperatures in excess of 20 °C, and 25 °C, respectively, while one species (Florentinia ...
    Subject code 333
    Language English
    Publisher Elsevier
    Publishing country de
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  10. Book ; Online: Physiological control on carbon isotope fractionation in marine phytoplankton

    Brandenburg, Karen M. / Rost, Björn / Waal, Dedmer B. / Hoins, Mirja / Sluijs, Appy

    eISSN: 1726-4189

    2022  

    Abstract: One of the great challenges in biogeochemical research over the past half a century has been to quantify and understand the mechanisms underlying stable carbon isotope fractionation (ε p ) in phytoplankton in response to changing p CO 2 . Partly, this ... ...

    Abstract One of the great challenges in biogeochemical research over the past half a century has been to quantify and understand the mechanisms underlying stable carbon isotope fractionation (ε p ) in phytoplankton in response to changing p CO 2 . Partly, this interest is grounded in the use of fossil photosynthetic organism remains as a proxy for past atmospheric CO 2 concentrations. Phytoplankton organic carbon is depleted in 13 C compared to its source because of kinetic fractionation by the enzyme RubisCO during photosynthetic carbon fixation, as well as through physiological pathways upstream of RubisCO. Moreover, other factors such as nutrient limitation, variations in light regime as well as phytoplankton culturing systems and inorganic carbon manipulation approaches may confound the influence of CO 2 on ε p . Here, based on experimental data compiled from the literature, we assess which underlying physiological processes cause the observed differences in ε p for various phytoplankton groups in response to C-demand/C-supply and test potential confounding factors. Culturing approaches and methods of carbonate chemistry manipulation were found to best explain the differences in ε p between studies, although daylength was an important predictor for ε p in haptophytes. Extrapolating results from culturing experiments to natural environments and for proxy applications therefore requires caution, and it should be carefully considered whether culture methods and experimental conditions are representative of natural environments.
    Subject code 333
    Language English
    Publishing date 2022-03-17
    Publishing country de
    Document type Book ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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