Eddies (IMAGE) University of Arizona Caption This modified photo illustrates how flux towers monitor eddies, or pockets of air, with instruments that measure the levels of carbon dioxide and water. "This allows us to estimate how much carbon the ecosystems are pulling in from the atmosphere versus how much water and carbon they are losing," said Greg Barron-Gafford. Credit Greg Barron-Gafford Usage Restrictions This visual may only be used in conjunction with reporting/posting of this news release. Image/video credit must be included exactly as indicated. 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.