 With these much older records, climate scientists like Ummenhofer may create better computer models to research the effects of climate change on vulnerable areas like the Indian Ocean.In 2009, Caroline Ummenhofer and others published "Geophysical Research Letters", which remains her most cited publication, and it is referenced in her nomination for the James B. Macelwane Medal.This study connected extreme droughts in Australia with conditions in Indian Ocean instead of the Pacific Ocean.