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  • Data  (2)
  • Dredge; DRG; Irish Sea; Isle_of_Man  (2)
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  • Data  (2)
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  • 1
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    Unknown
    Geochemical data derived from an absolutely dated shell-based chronology for the Irish Sea
    PANGAEA
    In:  Supplement to: Butler, Paul G; Scourse, James D; Richardson, Christopher A; Wanamaker, Alan D; Bryant, Charlotte L; Bennell, James (2009): Continuous marine radiocarbon reservoir calibration and the 13C Suess effect in the Irish Sea: Results from the first multi-centennial shell-based marine master chronology. Earth and Planetary Science Letters, 279(3-4), 230-241, https://doi.org/10.1016/j.epsl.2008.12.043
    Details
    Publication Date: 2023-05-12
    Description: The identification in various proxy records of periods of rapid (decadal scale) climate change over recent millennia, together with the possibility that feedback mechanisms may amplify climate system responses to increasing atmospheric CO2, highlights the importance of a detailed understanding, at high spatial and temporal resolutions, of forcings and feedbacks within the system. Such an understanding has hitherto been limited because the temperate marine environment has lacked an absolute timescale of the kind provided by tree-rings for the terrestrial environment and by corals for the tropical marine environment. Here we present the first annually resolved, multi-centennial (489-year), absolutely dated, shell-based marine master chronology. The chronology has been constructed by detrending and averaging annual growth increment widths in the shells of multiple specimens of the very long-lived bivalve mollusc Arctica islandica, collected from sites to the south and west of the Isle of Man in the Irish Sea. The strength of the common environmental signal expressed in the chronology is fully comparable with equivalent statistics for tree-ring chronologies. Analysis of the 14C signal in the shells shows no trend in the marine radiocarbon reservoir correction (DR), although it may be more variable before ~1750. The d13C signal shows a very significant (R**2 = 0.456, p 〈 0.0001) trend due to the 13C Suess effect.
    Keywords: Dredge; DRG; Irish Sea; Isle_of_Man
    Type: Dataset
    Format: application/zip, 2 datasets
    Location Call Number Expected Availability
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    DATA PANGAEA
  • 2
    facet.materialart.
    Unknown
    Shell-based chronologies for the Irish Sea
    PANGAEA
    In:  Supplement to: Butler, Paul G; Richardson, Christopher A; Scourse, James D; Wanamaker, Alan D; Shammon, Theresa M; Bennell, James (2010): Marine climate in the Irish Sea: analysis of a 489-year marine master chronology derived from growth increments in the shell of the clam Arctica islandica. Quaternary Science Reviews, 29(13-14), 1614-1632, https://doi.org/10.1016/j.quascirev.2009.07.010
    Details
    Publication Date: 2023-05-12
    Description: We demonstrate here that the growth increment variability in the shell of the long-lived bivalve mollusc Arctica islandica can be interpreted as an indicator of marine environmental change in the climatically important North Atlantic shelf seas. Multi-centennial (up to 489-year) chronologies were constructed using five detrending techniques and their characteristics compared. The strength of the common environmental signal expressed in the chronologies was found to be fully comparable with equivalent statistics for tree-ring chronologies. The negative exponential function using truncated increment-width series from which the first thirty years have been removed was chosen as the optimal detrending technique. Chronology indices were compared with the Central England Temperature record and with seawater temperature records from stations close to the study site in the Irish Sea. Statistically significant correlations were found between the chronology indices and (a) mean air temperature for the 14-month period beginning in the January preceding the year of growth, (b) mean seawater temperatures for February-October in the year preceding the year of growth (c) late summer and autumn air temperatures and sea surface temperatures for the year of growth and (d) the timing of the autumn decline in SST. Changes through time in the correlations with air and seawater temperatures and changes towards a deeper water origin for the shells in the chronology were interpreted as an indication that shell growth may respond to stratification dynamics.
    Keywords: Dredge; DRG; Irish Sea; Isle_of_Man
    Type: Dataset
    Format: application/zip, 2 datasets
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    DATA PANGAEA
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