2015 Global Temperature Map (IMAGE) North Carolina State University Caption 2015 was the warmest year since modern record-keeping began in 1880, according to a new analysis by NASA's Goddard Institute for Space Studies. The record-breaking year continues a long-term warming trend -- 15 of the 16 warmest years on record have now occurred since 2001. Credit Credits: Scientific Visualization Studio/Goddard Space Flight Center 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.