Variability in El Niño frequency and intensity over the past 4000 years

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Fossil corals contain a rich archive of past climate variability for tropical oceans which can extend the limited instrumental data and increase our understanding of climate sensitivity. El Niño variations in the Pacific have far-reaching impacts on Australian climate, and this project will reconstruct variations in the past in order to better forecast climate sensitivity in the future. It focuses on Christmas Island which is the optimal site to capture El Niño variability at several different time scales, and will lead to a better understanding of atmospheric and oceanic factors that have caused climate variability.