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

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 δ 18 O profiles of this species represent the seasonal change in melted ice water inflow. Oscillations in the shell δ 18...

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Bibliographic Details
Published in:Antarctic Science
Main Authors: Tada, Yohei, Wada, Hideki, Miura, Hideki
Format: Article in Journal/Newspaper
Language:English
Published: Cambridge University Press (CUP) 2006
Subjects:
Geology
Ecology, Evolution, Behavior and Systematics
Oceanography
Antarctic
The Antarctic
Antarc*
Antarctic Science
Online Access:http://dx.doi.org/10.1017/s0954102006000101
https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102006000101
Description
Summary: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 δ 18 O profiles of this species represent the seasonal change in melted ice water inflow. Oscillations in the shell δ 18 O values reflect seasonal change in seawater δ 18 O 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 δ 18 O 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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