Northern Hemisphere Land Area (IMAGE) Stockholm University Caption The percentage of the Northern Hemisphere land area with wet and dry anomalies, respectively, during the past the twelve centuries. The stronger the green color is the wetter it was and the stronger the brown color is the drier it was. The anomalies are shown with regard to the long-term mean between AD 1000 and 1899. Credit Fredrik Charpentier Ljungqvist Usage Restrictions Creative Commons 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.