Influence of El Niño-Southern Oscillation and the Indian Ocean Dipole on winegrape maturity in Australia

Abstract

Seasonal timing of winegrape maturity is influenced by weather conditions. Significant changes to day-of-year-of-maturity (DOYM), both earlier and later than average, causes logistical problems during harvest, impacting on grape and wine quality. Shifts in climate circulation patterns resulting from atmospheric teleconnections to changes in sea surface temperature (SST) anomalies associated with El Niño-Southern Oscillation (ENSO) and Indian Ocean Dipole (IOD) events can alter seasonal weather across Australia. Events tend to peak in the austral spring (IOD) and summer (ENSO), when vine and berry development is susceptible to anomalous weather. To investigate the impacts of ENSO and IOD on t..