SOFIE PMC observations during the northern summer of 2007 |
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| Authors: | Mark E Hervig Larry L Gordley James M Russell Scott M Bailey |
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| Institution: | 1. GATS, Inc., Driggs, ID 83422, USA;2. GATS, Inc., Newport News, VA 23606, USA;3. Hampton University, Hampton, VA 23668, USA;4. Virginia Polytechnic Institute, Blacksburg, VA 24061, USA;1. University of Alaska, Fairbanks, USA;2. Virginia Polytechnic Institute and State University, Blacksburg, USA;3. University of Rostock, Kuehlungsborn, Germany;4. University of Rostock, Kuehlungsborn, Germany;5. University of Colorado, Boulder, USA;1. Leibniz-Institute of Atmospheric Physics, Kühlungsborn, Germany;2. Deutsches Zentrum für Luft- und Raumfahrt, Institut für Physik der Atmosphäre, Oberpfaffenhofen, Germany;3. Meteorologisches Institut München, Ludwig-Maximilians-Universität München, Munich, Germany;1. Center for Space Sciences and Engineering and Department of Electrical and Computer Engineering, Virginia Tech, Blacksburg, VA, 24061, United States;2. Laboratory for Atmospheric and Space Physics, University of Colorado, Boulder, CO 80303, United States;3. GATS Inc., Newport News, VA 23606, United States;4. Computational Physics Inc., Boulder, CO 80301, United States;5. Center for Atmospheric Sciences, Hampton University, Hampton, VA 23668, United States;1. Space Science Division, Naval Research Laboratory, Washington, DC 20375, USA;2. Institute of Meteorology and Climate Research, Karlsruhe Institute of Technology, Leopoldshafen, Germany;3. School of Physics, Astronomy and Computational Sciences, George Mason University, Fairfax, VA, USA;4. Laboratory of Atmospheric and Space Physics and Department of Atmospheric and Oceanic Sciences, University of Colorado, Boulder, CO, USA;5. Center for Atmospheric Sciences, Hampton University, Hampton, VA, USA;6. Department of Earth and Space Sciences, Chalmers University of Technology, Göteborg, Sweden;1. Institute of Physics, Ernst-Moritz-Arndt-University of Greifswald, Felix-Hausdorff-Str. 6, 17489 Greifswald, Germany;2. GATS Inc., Driggs, ID83422, USA;3. Formerly Institute of Physics, Ernst-Moritz-Arndt-University of Greifswald, Germany |
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| Abstract: | This work examines the first season of polar mesospheric cloud (PMC) observations from the Solar Occultation for Ice Experiment (SOFIE). SOFIE observations of temperature, water vapor, and PMC frequency, mass density, particle shape, and size distribution are used to characterize the seasonal evolution and altitude dependence of mesospheric ice and the surrounding environment. SOFIE indicates that ice is nearly always present during summer, and that the ice layer is continuous from about 81 km altitude to the mesopause and above. Ice particles are observed to be more aspherical above and below the extinction peak altitude, suggesting a relationship between particle shape and mass density. The smallest particles are observed near the top of the ice layer while the largest particles exist at low concentrations near cloud base. A strong correlation was found between water vapor and particle size with small particles existing when H2O is low. This relationship holds when examining variability in altitude, and variability over time at one altitude. |
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