Latnjajaure Sweden OTC (IMAGE) Umea University Caption Open-top chambers (OTCs) in Latnjajaure, Sweden, provide a controlled environment to study simulated warming of the tundra ecosystem. Credit Sybryn Maes Usage Restrictions Free to publish. 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.