Heterogeneous chemistry on polar stratospheric clouds |
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| Institution: | 1. Dept. of Earth, Atmospheric and Planetary Sciences, Massachusetts Institut e of Technology, Cambridge, MA 02139, U.S.A.;2. Department of Chemistry, Massachusetts Institute of Technology, Cambridge, MA 02139, U.S.A.;1. St. Petersburg State University, Institute of Physics, St. Petersburg, Russia;2. Research Institute for Space Medicine Federal Research Clinical Center of Federal Biomedical Agency of Russia, Moscow, Russia;3. Space Climate Research Unit, University of Oulu, Finland;4. State Scientific Center of the Russian Federation Institute of Biomedical Problem of the RAS, Moscow, Russia;1. Atmospheric Chemistry Research Group, School of Chemistry, University of Bristol, Cantock''s Close, Bristol BS8 1TS, UK;2. rdscientific, Newbury, Berkshire, UK;3. Atmospheric Chemistry Services, Okehampton, Devon EX20 4QB, UK;4. The Centre for Atmospheric Science, The School of Earth, Atmospheric and Environmental Science, The University of Manchester, Simon Building, Brunswick Street, Manchester M13 9PL, UK;1. Laboratoire Atmosphères, Milieux, Observations Spatiales; Université Versailles Saint-Quentin-en-Yvelines; Université Pierre et Marie Curie - Paris 6; INSU; CNRS: UM8190, France;2. Laboratoire d’Océanographie et du Climat: Expérimentations et approches numériques, Sorbonne Universités, UPMC Université Paris 06, IPSL, UMR CNRS/IRD/MNHN, F-75005 Paris, France;3. School of Earth and Environment, University of Leeds, Leeds, UK;4. Bodeker Scientific, New Zealand;5. Imperial College, London, UK;6. Belgian Institute for Space Aeronomy (BIRA-IASB), Brussels, Belgium;7. Canadian Ctr Climate Modelling & Anal, Victoria, BC, Canada;8. Physikalisch-Meteorologisches Observatorium Davos and World Radiation Center (PMOD/WRC), Davos, Switzerland;9. Institute for Atmospheric and Climate Science, Swiss Federal Institute of Technology Zurich, Universitaetstrasse 16, CHN, CH-8092 Zurich, Switzerland;10. Univ Aquila, Dept Phys & Chem Sci, I-67100 Laquila, Italy;11. Natl Inst Environm Studies (NIES), Tsukuba, Ibaraki, Japan;12. National Center for Atmospheric Research, Boulder, CO, USA;13. Enigma Scientific Publications, Winnersh, Berkshire, UK;1. Institut für Physik, Ernst-Moritz-Arndt-Universität Greifswald, Germany;2. Science Systems and Applications Inc., Lanham, MD, USA |
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| Abstract: | Polar stratospheric clouds play a crucial role in the depletion of stratospheric ozone over Antarctica in the spring months. The cloud particles promote the conversion of the inert chlorine reservoirs HCl and ClONO2 to Cl2, which is photolytically active. Furthermore, the clouds lead to the removal of nitric acid and nitrogen oxides from the gas phase, facilitating the destruction of ozone by catalytic cycles involving chlorine free radicals. |
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