ENSO and SAM reconstructions

PAGES' 2k Network data have been used in a new Climate of the Past paper by Christoph Dätwyler et al. "Teleconnections and relationship between the El Niño–Southern Oscillation (ENSO) and the Southern Annular Mode (SAM) in reconstructions and models over the past millennium".

The climate of the Southern Hemisphere (SH) is strongly influenced by ENSO and SAM variations. Because of the limited length of instrumental records in most parts of the SH, very little is known about the relationship between these two key modes of variability over time.

Using proxy-based reconstructions and last-millennium climate model simulations, authors find that ENSO and SAM indices are mostly negatively correlated over the past millennium. Pseudo-proxy experiments indicate that currently available proxy records are able to reliably capture ENSO–SAM relationships back to at least 1600 CE.

Access the paper here.

Find out more about the 2k Network here and access the database used here.