• He served on the committee of the Australian Branch of the Royal Meteorological Society ( now the Australian Meteorological and Oceanographic Society ).

• He was on the editorial board of three international scientific journals : Climatic Change , International Journal of Climatology , and Natural Hazards .

• In 1980 , he developed Australia ’ s first climate change scenarios . This included identifying increasing rainfall intensity as a major impact .

• In 1989 , he formed CSIRO ’ s Climate Impact Group . In 1990 , the Group developed a scenario for 2030 predicting more warming , less rainfall in southern Australia , less snow , more rainfall in northern Australia , sea level rise and stronger cyclones .

• Between 1989 and 1999 , he recruited , supervised , mentored and motivated up to 12 staff . The group created innovative approaches to regional climate scenario development . He negotiated multi-year contracts with five Australian States , worked closely with clients to understand their needs , and co-authored dozens of reports tailored for each client . He emphasized scientific rigour , quantification of uncertainty , and the value of graphics that could simplify and communicate complexity . This work stimulated thinking about potential impacts , and actions needed to manage risks . His leadership style fostered a culture of collaboration and teamwork , which helped underpin the group ’ s success and positive morale which continued long after Barrie ’ s retirement .

Barrie retired from CSIRO in 1999 but remained productive as a CSIRO Post-Retirement Fellow from 1999-2007 . He was a Lead Author of the IPCC reports on Impacts Adaptation and Vulnerability in 2001 and 2007 , and he published three books :

• Pittock , A . B . ( 2003 ). Climate Change : An Australian Guide to the Science and Potential Impacts

• Pittock , A . B . ( 2005 ). Climate Change : Turning Up the Heat - 1st Edition

• Pittock , A . B . ( 2009 ). Climate Change | The Science , Impacts and Solutions

After leaving CSIRO , Barrie stayed in touch with the wide network of scientists with whom he ’ d collaborated . He also developed a strong interest in renewable energy and enjoyed reading articles about new technology . In 2014 , he was diagnosed with Alzheimer ' s disease , and in 2018 participated in a drug trial : Have we got Alzheimer ' s disease all wrong ? - ABC News . He saw it as one of his final contributions to science .

Barrie ’ s legacy will live on through his ground-breaking science , his leadership , his communication skills , and his ability to highlight important environmental issues . He was a smart , kind and humble person who will be sadly missed .