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Seasonal stable oxygen isotope cycles in an Antarctic bivalve shell (Laternula elliptica): a quantitative archive of ice-melt runoff

  • Yohei Tada (a1), Hideki Wada (a2) and Hideki Miura (a3)

Abstract

Oxygen isotope ratios in the shell of a Recent Antarctic marine bivalve Laternula elliptica are shown and their potential for environmental reconstruction is discussed. The shell δ18O profiles of this species represent the seasonal change in melted ice water inflow. Oscillations in the shell δ18O values reflect seasonal change in seawater δ18O values, caused by an addition of meltwater in summer. Since annual temperature variation is minimal and the inflow of the regional ice-melt is the dominant control on the shell δ18O values, the oxygen isotope record of L. elliptica is a quantitative indicator of the palaeo-ice-melting events in the Antarctic continental margin.

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Seasonal stable oxygen isotope cycles in an Antarctic bivalve shell (Laternula elliptica): a quantitative archive of ice-melt runoff

  • Yohei Tada (a1), Hideki Wada (a2) and Hideki Miura (a3)

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