• Giovanni Liguori (

In this subproject, we will investigate the links between precipitation extremes and the Interdecadal Pacific Oscillation (IPO), including its signature in El Niño–Southern Oscillation (ENSO) impacts, across tropical land regions.

We will begin by examining observations of past variations in precipitation extremes across Australia and other land regions adjacent to the Pacific basin. Furthermore, in light of the fact that the IPO and ENSO are known to have a strong influence on and droughts in the Australian region, we will consider both extremely dry conditions (drought) as well as heavy precipitation in our analysis of extremes.

Daily rainfall from reanalysis products will be validated with the TRMM precipitation analysis prior to analysis for Pacific basin land regions. Over the Australian region, we will also use the Australian Water Availability Project gridded dataset to provide an independent check on the results.