2:22 PM - 2:37 PM
[MIS19-09] A 70 years changes of the Java Sea surface condition based on geochemical analyses of a coral core
A coral core (Porites sp.) was collected from the the Seribu Islands located at the Java Sea, Indonesia. Measurements of Sr/Ca, U/Ca ratios and δ13C were performed by inductively coupled plasma (ICP)-optical emission spectrometer, ICP-mass spectrometer and stable isotope ratio mass spectrometer with about 2-month time resolution.
Although it has been reported that both coral Sr/Ca and U/Ca ratios can be used as paleothermometer [Beck et al., 1992; Min et al., 1995], coral U/Ca ratios also depends on seawater pH [Inoue et al., 2011] and carbonate ion concentration ([CO32-]) [Anagnostou et al., 2011]. Furthermore, since coral δ13C reflects DIC of ambient seawater, we will discuss about marine environments such as water temperature and seawater pH at the Java Sea for 70 years.