Irmak at research station (IMAGE) Penn State Caption Researcher Suat Irmak programming the datalogger in one of his surface water vapor and energy flux towers to measure crop water use, all incoming and outgoing radiation fluxes, and all other climate variables such as air temperature, relative humidity, vapor pressure deficit, net radiation, precipitation, soil moisture, soil temperature on an hourly basis. The same flux tower was used in this corn vs. climate change study. Credit Suat Irmak research group, Penn State Usage Restrictions Non-commercial use only 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.