Summer SST Phenology Changes (IMAGE) University of Maine Caption SST phenology trends over the study area for the 33-year study period, shown as the trend in the duration (number of days) of summer at each location. Summer is increasing in duration at all locations, with some places in the Gulf of Maine increasing at a rate of over two days per year. The inserts maps the probability (p values) that the rate slope is equal to zero. Credit Andrew C. Thomas 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.