Development of a foraminifera-based transfer function in the Basque marshes, N. Spain: Implications for sea-level studies in the Bay of Biscay

摘要: Abstract In order to reconstruct former sea level we have developed a foraminifera-based transfer function using three models based on modern dataset of 59 samples and 23 species obtained from four Basque marshes in Northern Spain. The relationship between observed foraminifera-predicted elevation illustrated the strong performance ( r 2 jack ranges 0.74 0.81). These results indicated that precise reconstructions levels are possible (error 0.11 0.19 m). was used calibrate foraminiferal assemblages collected 50 cm salt marsh core. We placed into temporal framework 137 Cs, Pb concentrations, 210 Pb-derived sediment accumulation rates. resulting relative sea-level curve is good agreement with regional tide-gauge data. Both instrumental data microfossil records suggest rate rise approximately 2 mm yr − 1 for 20th century.