A two-dimensional model of thermospheric nitric oxide sources and their contributions to the middle atmospheric chemical balance |
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| Institution: | 1. Sterling Software, 1404 Fort Crook Road South, Bellevue, NE, USA;2. Department of Physics and Astronomy, University of Kansas, Lawrence, KS, USA;3. Laboratory for Atmospheres, NASA/Goddard Space Flight Center, Greenbelt, MD, USA;1. Space Science Division, Naval Research Laboratory, Washington, DC, United States;2. NASA Langley Research Center, Hampton, VA, United States;3. GATS Inc., Hampton, VA, United States;4. Graz University of Technology, Graz, Austria;5. MISU, Stockholm University, Stockholm, Sweden;1. University of Iowa, Dept. of Physics and Astronomy, Iowa City, IA 52242, USA;2. LESIA, Observatoire de Paris, CNRS, UPMC, Universit Paris Diderot, Meudon, France;3. Imperial College of Science, Technology and Medicine, Space and Atmospheric Physics Group, Department of Physics, London SW7 2BW, UK;4. University of Leicester, Department of Physics and Astronomy, Leicester LE1 7RH, UK;5. Central Arizona College, Department of Science, Coolidge, AZ 85128, USA;6. Jet Propulsion Laboratory, 4800 Oak Grove Drive, Pasadena, CA 91109, USA;7. Space Environment Technologies, Planetary and Space Science Division, 320 N. Halstead Street, Suite 110, Pasadena, CA 91107, USA;8. Laboratory for Atmospheric and Space Physics, University of Colorado Boulder, 1234 Innovation Drive, Boulder, CO 80303, USA;1. Department of Computer Science, Electrical, and Space Engineering, Luleå University of Technology, Box 812, Rymdcampus, S-981 28 Kiruna, Sweden;2. Institute for Aerospace Studies, University of Toronto, Toronto M3H 5T6, Canada;1. Department of Electric and Computer Engineering, University of New Mexico, Albuquerque, New Mexico, USA;2. Configurable Space Microsystems Innovations & Applications Center, Albuquerque, New Mexico, USA;3. High Altitude Observatory, National Center for Atmospheric Research, Boulder, Colorado, USA;4. Air Force Research Laboratory, Space Vehicles Directorate, Kirtland AFB, New Mexico, USA |
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| Abstract: | The NASA/Goddard Space Flight Center two-dimensional (GSFC 2D) photochemical transport model has been used to study the influence of thermospheric NO on the chemical balance of the middle atmosphere. Lower thermospheric NO sources are included in the GSFC 2D model in addition to the sources that are relevant to the stratosphere. A time series of hemispheric auroral electron power has been used to modulate the auroral NO production in the auroral zone. A time series of the Ottawa 10.7-cm solar flux index has been used as a proxy to modulate NO production at middle and low latitudes by solar EUV and soft X-rays. An interhemispheric asymmetry is calculated for the amounts of odd nitrogen in the polar stratosphere. We compute a <～3% enhancement in the odd nitrogen (NOy=N, NO, NO2, NO3, N2O5, BrONO2, ClONO2, HO2NO2, and HNO3) budget in the north polar stratosphere (latitude > 50°) due to thermospheric sources, whereas we compute a <～8% enhancement in the NOy budget in the south polar stratosphere (latitude > 50°). |
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