Closed System (IMAGE) Columbia Climate School Caption In the lab, a custom-built gas-exchange device measures rates of leaf respiration as temperatures are increased. Credit Kevin Griffin/Lamont-Doherty Earth Observatory Usage Restrictions Credit must be given. 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.