Rainbow over Sydney Harbor (IMAGE) University of Sydney Caption Lead author Edwina Tanner took numerous photos of the Sydney Harbour during CO2 measurements she made with instruments mounted to the back of the Sydney Institute of Marine Science research vessel The Kirby. Credit University of Sydney lead researcher Edwina Tanner Usage Restrictions Must credit License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.