Lidar study of the characteristics of gravity waves in the mesopause region at a southern low-latitude location |
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| Institution: | 1. Max Planck Institute for Solar System Research, Göttingen, Germany;2. Center for Atmospheric Sciences, Hampton University, Hampton, VA, USA;3. NASA Goddard Space Flight Center, Greenbelt, MD, USA;4. The Catholic University of America, Washington, DC, USA;5. Laboratory of Dynamical Meteorology, École Polytechnique, Palaiseau, France;1. CAS Key Laboratory for Geospace Environment, School of Earth & Space Sciences, University of Science & Technology of China, Hefei, China;2. Mengcheng National Geophysical Observatory, School of Earth & Space Sciences, University of Science & Technology of China, Hefei, China;1. National Atmospheric Research Laboratory, Gadanki, India;2. Indian Institute of Geomagnetism, New Panvel, Navi Mumbai, India;3. 3/78, Periyavilai, Pulippunam, Kanyakumari, India;4. Equatorial Geophysical Research Laboratory, Indian Institute of Geomagnetism, Tirunelveli, India;5. MF Radar Facility, Indian Institute of Geomagnetism, Shivaji University Campus, Kolhapur, India;1. Department of Geosciences, University of Oslo, Norway;2. Birkeland Centre for Space Science, University of Bergen, Norway;3. Norwegian Institute for Air Research, Kjeller, Norway;4. Department of Coastal and Marine Systems Science, Coastal Carolina University, Conway, SC, USA;5. Department of Earth and Space Sciences, Chalmers University of Technology, Gothenburg, Sweden;1. Department of Civil Engineering, Federal University of Rio Grande do Sul, Porto Alegre, Brazil;2. Department of Mechanical Engineering, Federal University of Rio Grande do Sul, Porto Alegre, Brazil;1. Dep. Física, PPGCTA, Universidade Estadual da Paraíba, UEPB, 58.109-790, Campina Grande, PB, Brazil;2. Instituto Nacional de Pesquisas Espaciais, INPE, Brazil |
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| Abstract: | Using the technique developed by Gardner and Voelz 1987. Lidar studies of the nighttime sodium layer over Urbana, Illinois, 2. Gravity waves. Journal of Geophysical Research 92, 4673–4693] and a new method proposed by us, two groups of gravity wave parameters are extracted from 11 years sodium lidar measurements made at a southern low-latitude location. The wave occurrence frequencies, wave parameter distributions, and wave parameter relationships are given and compared with other lidar observations. The different lidar derived results can be attributed to different atmospheric parameters. The characteristics of these two groups of gravity waves are also compared, as well as that predicted by diffusive filtering theory, and we find the gravity wave relationships derived from our method are in better agreement with diffusive filtering theory predictions. |
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