Comparison of Berkeley and Hadley Data (IMAGE) University of California - Berkeley Caption New UC Berkeley analysis of ocean buoy (green) and satellite data (orange) shows that ocean temperatures have increased steadily since 1999, as NOAA concluded in 2015 (red) after adjusting for a cold bias in buoy temperature measurements. The Hadley data, which has not been adjusted to account for some sources of cold bias (purple), still underestimates sea surface temperature changes compared to the UC Berkeley analysis. The lines show the general upward trend in ocean temperatures. Credit Zeke Hausfather, UC Berkeley Usage Restrictions None 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.