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  • 1
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    40-year long monthly-resolved Sr/Ca record from 2.35 ka Bonaire coral, sample BON-6-A (2010)
    PANGAEA
    In:  Supplement to: Giry, Cyril; Felis, Thomas; Scheffers, Sander R; Fensterer, Claudia (2010): Assessing the potential of Southern Caribbean corals for reconstructions of Holocene temperature variability. IOP Conference Series: Earth and Environmental Science, 9(1), 012021, https://doi.org/10.1088/1755-1315/9/1/012021
    Details
    Publication Date: 2024-05-31
    Description: We present a 40-year long monthly resolved Sr/Ca record from a fossil Diploria strigosa coral from Bonaire (Southern Caribbean Sea) dated with U/Th at 2.35 ka before present (BP). Secondary modifiers of this sea surface temperature (SST) proxy in annually-banded corals such as diagenetic alteration of the skeleton and skeletal growth-rate are investigated. Extensive diagenetic investigations reveal that this fossil coral skeleton is pristine which is further supported by clear annual cycles in the coral Sr/Ca record. No significant correlation between annual growth rate and Sr/Ca is observed, suggesting that the Sr/Ca record is not affected by coral growth. Therefore, we conclude that the observed interannual Sr/Ca variability was influenced by ambient SST variability. Spectral analysis of the annual mean Sr/Ca record reveals a dominant frequency centred at 6–7 years that is not associated with changes of the annual growth rate. The first monthly resolved coral Sr/Ca record from the Southern Caribbean Sea for preindustrial time suggests that fossil corals from Bonaire are suitable tools for reconstructing past SST variability. Coastal deposits on Bonaire provide abundant fossil D. strigosa colonies of Holocene age that can be accurately dated and used to reconstruct climate variability. Comparisons of long monthly resolved Sr/Ca records from multiple fossil corals will provide a mean to estimate seasonality and interannual to interdecadal SST variability of the Southern Caribbean Sea during the Holocene.
    Keywords: BON-6-A; Calculated, see reference(s); CaribClim_Coral_2006; Center for Marine Environmental Sciences; Diploria strigosa, Strontium/Calcium ratio; DRILL; Drilling/drill rig; ICP-OES, Perkin-Elmer, Optima 3300R; Integrierte Analyse zwischeneiszeitlicher Klimadynamik; INTERDYNAMIK; Internal coral chronology; MARUM; Southern Caribbean Sea, Bonaire
    Type: Dataset
    Format: text/tab-separated-values, 960 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 2
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    (Supplementary Table 1) 230Th/U results for stalagmite Cuba Grande (CG) from Pinar del Rio (2010)
    PANGAEA
    In:  Supplement to: Fensterer, Claudia; Scholz, Denis; Hoffmann, Dirk L; Mangini, Augusto; Pajon, Jesus M (2010): 230Th/U-dating of a late Holocene low uranium speleothem from Cuba. IOP Conference Series: Earth and Environmental Science, 9(1), 012015, https://doi.org/10.1088/1755-1315/9/1/012015
    Details
    Publication Date: 2024-05-31
    Description: We present 22 U-series ages for a stalagmite from north-western Cuba based on multi-collector inductively coupled plasma mass spectrometry (MC-ICPMS) and thermal ionisation mass spectrometry (TIMS). Our results reveal that the stalagmite continuously grew within the last ~1400a. Low uranium content of the sample and thus, extremely low 230Th concentrations limit the precision and accuracy of 230Th/U-dating by TIMS. Samples measured by MC-ICPMS show a high variability of 232Th content along the growth axis with some sections significantly affected by initial 230Th from a detrital phase. An a-priori bulk earth ratio for (238U/232Th) cannot be used to accurately account for this initial 230Th. Using an age model based on the 230Th/U ages determined on samples with low or negligible 232Th concentration, we find that the (238U/232Th) activity ratio of the detrital phase is an order of magnitude larger than the bulk earth value, indicating the importance of an accurately determined correction factor.
    Keywords: Age, comment; Age, dated; Age, dated standard deviation; CG; Cuba_Grande; DISTANCE; Integrierte Analyse zwischeneiszeitlicher Klimadynamik; INTERDYNAMIK; Multi-collector inductively coupled plasma mass spectrometer (MC-ICP-MS); Pinar del Rio (NW Cuba); Speleothem sample; SPS; Thorium-230/Thorium-232 activity ratio; Thorium-230/Thorium-232 activity ratio, standard deviation; Thorium-230/Uranium-238 activity ratio, standard deviation; Thorium-230/Uranium-238 ratio; Thorium-232; Thorium-232, standard deviation; Uranium-234, standard deviation; Uranium-234/Uranium-238 activity ratio; Uranium-238; Uranium-238, standard deviation
    Type: Dataset
    Format: text/tab-separated-values, 351 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 3
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    Control of Seasonality and Interannual to Centennial Climate Variability in the Caribbean During the Holocene—Combining Coral Records, Stalagmite Records and Climate Models (2014)
    In:  EPIC3Integrated Analysis of Interglacial Climate Dynamics (INTERDYNAMIC), Integrated Analysis of Interglacial Climate Dynamics (INTERDYNAMIC), 6 p., pp. 69-74, ISBN: 978-3-319-00692-5, ISSN: 2191-589X
    Details
    Publication Date: 2015-06-05
    Description: This study aimed at quantifying the amplitudes of seasonality and interannual to centennial climate variability in the Caribbean region throughout the Holocene, by using marine (shallow-water corals) and terrestrial (speleothems) climate archives, and climate model simulations (COSMOS). Sea-surface temperature (SST) variability on interdecadal to multidecadal timescales was more pronounced during the mid-Holocene compared to the late Holocene. The amplitude of the SST annual cycle was within the present-day range throughout most of the last 6,000 years. Exceptions include slightly increased SST seasonality at 6,200 years ago, which can be attributed mainly to insolation forcing on orbital timescales, and an increased SST seasonality at 2,350 years ago that can be attributed to internal dynamics of the climate system (El Niño-Southern Oscillation). On multidecadal and millennial timescales, precipitation variability during the Holocene was strongly linked to SST in the North Atlantic Ocean, namely the Atlantic Multidecadal Oscillation and variations in the strength of the Atlantic Meridional Overturning Circulation.
    Repository Name: EPIC Alfred Wegener Institut
    Type: Inbook , peerRev
    Location Call Number Limitation Availability
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