Tundra in the Siberian Arctic (IMAGE) University of Zurich Caption Graminoid-dominated tundra with dwarf shrubs growing in national park Kytalyk, in the Siberian Arctic. The blurred areas in the image are created by heat haze, which occurs when various surfaces heat up differently and hence create turbulence in the air. Credit Gabriela Schaepman-Strub, University of Zurich Usage Restrictions none License Original 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.