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    Mg/Ca ratios of single planktonic foraminifer shells and the potential to reconstruct the thermal seasonality of the water column (2011)
    AGU (American Geophysical Union)
    In:  Paleoceanography, 26 (3). PA3218.
    Details
    Publication Date: 2019-09-23
    Description: Mg/Ca ratios of surface and subsurface dwelling foraminifera provide valuable information about the past temperature of the water column. Planktonic foraminifera calcify over a period of weeks to months. Therefore, the range of Mg/Ca temperatures obtained from single specimens potentially records seasonal temperature changes. We present solution-derived Mg/Ca ratios for single specimens of the planktonic foraminifera species Globigerinoides ruber (pink), Globigerinoides ruber (white), and Globorotalia inflata from a sediment trap off northwest Africa (20°45.6′N, 18°41.9′W). Cleaning of single specimens was achieved using a flow-through system in order to prevent sample loss. Mg/Ca ratios of surface dwelling G. ruber (pink) show strong seasonality linked to sea surface temperature. Mg/Ca ratios of G. ruber (white) do not show such seasonality. Subsurface dwelling G. inflata flux is largest during the main upwelling season, but Mg/Ca ratios reflect annual temperatures at intermediate water depths. The sediment trap time series suggests that changes in the range of Mg/Ca ratios exhibited by single specimens of G. ruber (pink) and G. inflata from the sedimentary record should provide information on the past temperature range under which these species calcified. Statistical analysis suggests detectable changes in the Mg/Ca range are ≥0.80 mmol/mol (G. ruber (pink)) and ≥0.34 mmol/mol (G. inflata). For G. ruber (pink), such changes would indicate changes in the seasonal sea surface temperature range 〉4°C or a shift in the main calcification and reproductive period. For G. inflata, such changes would indicate 〉1.7°C changes in the thermocline temperature or a change in the depth habitat.
    Type: Article , PeerReviewed
    Format: text
    DOI: 10.1029/2010PA002091
    Location Call Number Limitation Availability
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    OceanRep: Article in a Scientific Journal - peer-reviewed
  • 2
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    Single planktonic foraminiferal Mg/Ca ratios of samples from sediment trap CBi3 upper off Cape Blanc (NW-Africa) (2011)
    PANGAEA
    In:  Supplement to: Haarmann, Tim; Hathorne, Ed C; Mohtadi, Mahyar; Groeneveld, Jeroen; Kölling, Martin; Bickert, Torsten (2011): Mg/Ca ratios of single planktonic foraminifer shells and the potential to reconstruct the thermal seasonality of the water column. Paleoceanography, 26, PA3218, https://doi.org/10.1029/2010PA002091
    Details
    Publication Date: 2023-10-25
    Description: The data shows Mg/Ca ratios of single specimens of the planktonic foraminifera Globigerinoides ruber (pink and white variety) and Globorotalia Inflata from a sediment trap anchored off Cape Blanc (NW-Africa). Mg/Ca ratios were determined on an ICP-MS and ICP-OES at the University of Bremen, after flow-through cleaning. Additionally, shells sizes and calculated shell weights are provided.
    Keywords: Cape Blanc; CBi3; Center for Marine Environmental Sciences; Comment; DATE/TIME; Date/time end; DEPTH, water; Globigerinoides ruber pink, Magnesium/Calcium ratio; Globigerinoides ruber pink, size; Globigerinoides ruber pink, weight; Globigerinoides ruber white, Magnesium/Calcium ratio; Globigerinoides ruber white, size; Globigerinoides ruber white, weight; Globorotalia inflata, Magnesium/Calcium ratio; Globorotalia inflata, size; Globorotalia inflata, weight; ICP-OES, Inductively coupled plasma - optical emission spectrometry; ICP-OES/ICP-MS; MARUM; POS344/1; Poseidon; Sample code/label; Trap; TRAP
    Type: Dataset
    Format: text/tab-separated-values, 820 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
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