Ob' and Yenisei Map (IMAGE) Florida State University Caption Alkalinity increases in the Ob' and Yenisei were considerably higher than similarly large river systems around the world. Credit Travis Drake 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.