The response of stable water isotopes in precipitation and the surface ocean to tropical climate variability


Stable water isotope records may be used to reconstruct tropical climate variability on seasonal to glacial time scales. Isotopic ratios in precipitation are archived in tropical ice cores, and may be interpreted as records of precipitation, temperature and atmospheric circulation variability in the tropics. Isotopic ratios in the carbonate skeletons of coral and foraminifera record local and mean ocean isotopic ratios as well as sea surface temperature. Reconstruction of past climate from isotopic records requires assumptions about the isotope–climate relationship on the relevant time scale. In order to test these assumptions, an isotopic tracer scheme in the Melbourne University General Circulation Model is used to simulate the isotope...

School of Earth Sciences University of Melbourne

School of Earth Sciences University of Melbourne

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