Radiometers (image) DOE/Lawrence Berkeley National Laboratory Share Print E-Mail Caption The scientists used radiometers, shown here, to isolate the signal of methane's greenhouse effect. Radiometers are among the many instruments at ARM's Southern Great Plains observatory that the team utilized as part of this study. Credit ARM Climate Research Facility Usage Restrictions None Share Print E-Mail 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.