+ Visit NASA.gov + Advanced Search   + About the Server   + Animation List   + How to Use the Server   + RSS Feeds   + Podcasts   + Opportunities Previous Animation Next Animation Energetic Particle Flux over the Arctic from PEM (11/9/91) UARS measures the flux of energetic particles from space using the Particle Environment Monitor, PEM. These high energy particles cause ozone depletion at high altitudes by producing nitrogen and hydrogen radicals.    Energetic particle flux over the arctic as measured by PEM on 11-9-91 Duration: 5.0 seconds Available formats:   352x240 (29.97 fps) MPEG-1   823 KB   160x80       PNG           14 KB   80x40         PNG           4 KB   320x242     JPEG         7 KB How to play our movies Animation Number: 1378 Completed: 1999-04-09 Animator: Horace Mitchell (NASA/GSFC) (Lead) Scientist: Mark Schoeberl (NASA/GSFC) Platform/Sensor/Data Set: UARS/PEM (1991/11/9) Series: UARS Keywords: DLESE >> Atmospheric science SVS >> Ozone More Information on this topic available at: stories/UARS/index.html     Please give credit for this item to: NASA/Goddard Space Flight Center Scientific Visualization Studio Back to Top + Privacy Policy and Important Notices + Reproduction Guidelines NASA Official: Content Contact: Curator: