Oxygen isotopes in corals and their use as proxies for El Niño
El Niño and the Southern Oscillation (ENSO) have a great impact on global climate, often with disas-trous effects in many parts of the world. The carbonate skeleton of corals record El Niño activity by tracing sea surface temperature and salinity in the oceans where they grow. As El Niño’s core region is the equatorial Pacific Ocean, this is where the most direct consequences of ENSO are seen, com
