HALO (IMAGE) Johannes Gutenberg Universitaet Mainz Caption With the help of the HALO research aircraft, the RMU team will measure the composition of the atmosphere of the Northern and Southern Hemispheres in order to gain more insight into differences in circulation in the two hemispheres. Credit photo/©: Peter Hoor Usage Restrictions This image may only be used in connection with the press release "Rhine-Main Universities undertake research into transport processes in the tropopause", issued by Johannes Gutenberg University Mainz on March 28, 2019. 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.