Effects of short-term solar uv variability on the stratosphere |
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| Institution: | 1. Lunar and Planetary Lab, Univ. of Arizona, Tuscon, Arizona 85721, USA;1. National Atmospheric Research Laboratory (NARL), Gadanki, India;2. Department of Physics, Sri Venkateswara University, Tirupati, India;3. Research Institute for Sustainable Humanosphere, Kyoto University, Uji, Japan;4. B1, CEEBROS, 47/20, IIIrd Main Road, Chennai, India;5. EGRL, Indian Institute of Geomagnetism (IIG), Mumbai, India;6. Indian Institute of Geomagnetism (IIG), Mumbai, India;7. Space Physics Laboratory, VSSC, Thiruvananthapuram, India;1. Space Physics Laboratory, Vikram Sarabhai Space Center, Trivandrum, 695022, India;2. School of Space and Environment, Beihang University, Beijing, China;3. Thayer School of Engineering, Dartmouth College, Hanover, NH, USA;1. National Institute of Meteorology and Hydrology, Bulgarian Academy of Sciences, 67 Tsarigradsko shose Blvd., 1784 Sofia, Bulgaria;2. Faculty of Physics, Sofia University “St. Kliment Ohridski”, 5 James Bourchier Blvd., 1164 Sofia, Bulgaria;3. Bulatsa, Sofia, 1 Brussels Blvd., 1540 Sofia, Bulgaria;4. National Institute of Geophysics, Geodesy and Geography, Acad. G. Bonchev Str., bl. 3, 1113 Sofia, Bulgaria;1. Physics Department, Colorado State University, Fort Collins, USA;2. Center of Atmospheric and Space Sciences, Utah State University, Logan, USA;3. Department of Physics and Astronomy, Clemson University, Clemson, USA;1. Institute of Meteorology and Oceanography, PLA University of Science and Technology, Nanjing 211101, China;2. State Key Laboratory of Satellite Ocean Environment Dynamics, Second Institute of Oceanography, State Oceanic Administration, Hangzhou 310012, China;3. State Key Laboratory of Space Weather, Chinese Academy of Sciences, Beijing 100190, China;1. Department of Physics, Institute of Science, Banaras Hindu University, Varanasi 221005, India;2. Department of Electronics and Communication Engineering, Tripura University, Agartala 799022, India;3. Department of Physics, M.L.S. University, Udaipur 313001, India |
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| Abstract: | Changes in solar ultraviolet flux produce changes in ozone concentration in the upper stratosphere with associated radiative and dynamical effects. At low latitudes, the response of ozone mixing ratio to solar UV variations on the time scale of the solar rotation period is well characterized observationally. In addition, there is some provisional evidence for an ozone response at intermediate periods of 60-80 days. Current two-dimensional stratospheric models simulate the observed 27-day response amplitudes and phase lags with reasonable accuracy in the upper stratosphere. The observed response of total ozone on the 27-day time scale is also in approximate agreement with the same models although observed ozone sensitivities and phase lags are slightly larger than expected theoretically. Future studies of the 27-day response at higher latitudes and altitudes are needed to test more completely our understanding of the direct effects of solar UV variability on the middle atmosphere. |
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