Abstract
The response of pseudo-corals to ENSO in an isotope-enabled climate model
Highlights
Some long-lived corals generate sufficiently high growth rates as to allow measurement of δ18Ocoral at subannual resolution over multiple decades (e.g. Carré et al, this issue). These properties provide a strong basis for using fossil corals δ18Ocoral to reconstruct sea surface temperature (SST) variability associated with the El-Niño Southern
Quantifying the spatial pattern of relative contributions from SST and δ18Osw to δ18Ocoral remains a challenge for interpreting these records
The δ18Osw contribution can be estimated empirically from an instrumental SST record, provided that (1) the ENSO-related δ18Osw fluctuations relate linearly to those in SST and (2) this relationship remains stationary throughout the period of interest
Summary
In regions with a very active hydrological cycle, where the δ18Osw contribution is thought to dominate the overall δ18Ocoral signal, records have been used to infer past changes in precipitation, rather than SST (Cole and Fairbanks 1990). Quantifying the spatial pattern of relative contributions from SST and δ18Osw to δ18Ocoral remains a challenge for interpreting these records.
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