Decadal Correlation (IMAGE) Stockholm University Caption These are maps showing decadal correlation during the 20th century between instrumental measurements of temperature and precipitation (left), tree-ring reconstructed temperature and drought (middle), and model-simulated temperature and precipitation (right) for the summer season. The stronger the red colour, the more positive (warm = wet) is the correlations. The stronger the blue colour, the more negative (warm = dry) is the correlations. Credit Fredrik Charpentier Ljungqvist 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.