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  • Age; AGE; Arid environment; Caesium-137, activity; Caesium-137, activity, error; Carbon, organic, total; Carbon, organic, total, error, relative; Carbon, organic/Nitrogen, total ratio; Carbon, organic/Nitrogen, total ratio, error; Carbon, organic/Sulfur ratio, error; Carbon, organic total/Sulfur, total, ratio; Carbon and nitrogen and sulfur (CNS) isotope element analyzer, Elementar, Vario EL III; Climate change; Coastal impacts; DEPTH, sediment/rock; Element analyser, Thermo Scientific FLASH2000; GC; Geochemistry; Grain size, mean; Gravity corer; Lacustrine_lagoon_THIII; Lead-210 activity per mass, excess; Lead-210 activity per mass, excess, error; Morocco; Radium-226 activity per mass; Radium-226 activity per mass, error; remote sensing; Saharan wetlands; Sedimentary chlorophyll; Sedimentary chlorophyll, error; δ13C; δ13C, error  (1)
  • Age; AGE; Boqc0901; C3 plant; DEPTH, sediment/rock; DHC; Diver-held corer; hydrogen; Isotope ratio mass spectrometry; isotopes; last millenia; n-Alkanoic acid C28, δ13C; n-Alkanoic acid C28, δ13C, standard deviation; n-Alkanoic acid C28, δD; n-Alkanoic acid C28, δD, standard deviation; Plant wax; δ Deuterium, precipitation wax reconstruction  (1)
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  • 1
    facet.materialart.
    Unknown
    Boqueirão Lake, Northeastern Brazil 2,300 years dD precipitation reconstruction (2019)
    PANGAEA
    In:  Supplement to: Utida, Giselle; da Cruz Junior, Francisco William; Etourneau, Johan; Bouloubassi, Ioanna; Schefuß, Enno; Vuille, Mathias; Novello, Valdir Felipe; Prado, Luciana Figueiredo; Sifeddine, Abdelfettah; Vincent, Klein; Zular, André; Viana, João Cláudio Cerqueira; Turcq, Bruno Jean (2019): Tropical South Atlantic influence on Northeastern Brazil precipitation and ITCZ displacement during the past 2300 years. Scientific Reports, 9(1), 1698, https://doi.org/10.1038/s41598-018-38003-6
    Details
    Publication Date: 2023-08-26
    Description: Recent paleoclimatic studies suggest that changes in the tropical rainbelt across the Atlantic Ocean during the past two millennia are linked to a latitudinal shift of the Intertropical Convergence Zone (ITCZ) driven by the Northern Hemisphere (NH) climate. However, little is known regarding other potential drivers that can affect tropical Atlantic rainfall, mainly due to the scarcity of adequate and high-resolution records. In this study, we fill this gap by reconstructing precipitation changes in Northeastern Brazil during the last 2,300 years from a high-resolution lake record of hydrogen isotope compositions of plant waxes from the core Boqc0901 dated by Viana et al . (2014). We present isotope carbon and hydrogen plant waxes of n-C28 alkanoic acid, the percentage of C3 plants and hydrogen isotope reconstruction of precipitation. We find that regional precipitation along the coastal area of South America was not solely governed by north-south displacements of the ITCZ due to changes in NH climate, but also by the contraction and expansion of the tropical rainbelt due to variations in sea surface temperature and southeast trade winds in the tropical South Atlantic Basin.
    Keywords: Age; AGE; Boqc0901; C3 plant; DEPTH, sediment/rock; DHC; Diver-held corer; hydrogen; Isotope ratio mass spectrometry; isotopes; last millenia; n-Alkanoic acid C28, δ13C; n-Alkanoic acid C28, δ13C, standard deviation; n-Alkanoic acid C28, δD; n-Alkanoic acid C28, δD, standard deviation; Plant wax; δ Deuterium, precipitation wax reconstruction
    Type: Dataset
    Format: text/tab-separated-values, 623 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 2
    facet.materialart.
    Unknown
    Geochemistry of coastal wetland in the Northern Saharan environment through lacustrine sediment core THIll (2020)
    PANGAEA
    Details
    Publication Date: 2023-11-02
    Description: The core was collected manually from a boat employing a gravity core sampler. The core was sliced every two centimeters in the field, packed in individual identified plastics bags, and kept refrigerated. The THIII sediment core (N 28°01.626, W 12°16.558), measuring 48 cm, was recovered in one of the sections of the main water entrance channel in the Lagoon. This site is approximately seven meters deep and lies between two islets of exposed sediment dominated by marine grass specimens of *Zostera noltii*. During the sampling, salinity at the site was 40 PSU (Practical Salinity Unit). Due to its proximity to the inlet, this site is highly influenced by the seawater entrance and ocean nutrients. Aiming the recognition of the environmental changes at this point of the lagoon, we have performed the following measurements in the core's sediments: isotopic ratio of C, dating (210Pb and 137Cs calibration), sedimentation rate, mean grain size, Chlorophyll, Total Organic Carbon (TOC), C/N elemental ratio and C/S elemental ratio.
    Keywords: Age; AGE; Arid environment; Caesium-137, activity; Caesium-137, activity, error; Carbon, organic, total; Carbon, organic, total, error, relative; Carbon, organic/Nitrogen, total ratio; Carbon, organic/Nitrogen, total ratio, error; Carbon, organic/Sulfur ratio, error; Carbon, organic total/Sulfur, total, ratio; Carbon and nitrogen and sulfur (CNS) isotope element analyzer, Elementar, Vario EL III; Climate change; Coastal impacts; DEPTH, sediment/rock; Element analyser, Thermo Scientific FLASH2000; GC; Geochemistry; Grain size, mean; Gravity corer; Lacustrine_lagoon_THIII; Lead-210 activity per mass, excess; Lead-210 activity per mass, excess, error; Morocco; Radium-226 activity per mass; Radium-226 activity per mass, error; remote sensing; Saharan wetlands; Sedimentary chlorophyll; Sedimentary chlorophyll, error; δ13C; δ13C, error
    Type: Dataset
    Format: text/tab-separated-values, 378 data points
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    DATA PANGAEA
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