A case study of the reaction of the auroral atmosphere to local energy inputs |
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| Institution: | 1. Department of Physics, Olabisi Onabanjo University, P.M.B. 2002, Ago Iwoye, Ogun State, Nigeria;2. Space Weather Group, Department of Physical Sciences, Landmark University, P.M.B 1001, Omu-Aran, Kwara State, Nigeria;3. Department of Physics, University of Lagos, Akoka – Yaba, Lagos State, Nigeria;4. Department of Physics, University of Tasmania, Hobart, Australia;1. Space Physics Laboratory, Vikram Sarabhai Space Centre, Thiruvananthapuram 695022, India;2. National Center for Earth Science Studies, Thiruvananthapuram 695011, India;1. Department of Physics, Federal University Oye-Ekiti, Ekiti State, Nigeria;2. The Abdus Salam International Centre for Theoretical Physics (ICTP), Trieste, Italy;3. Institute of Scientific Research, Boston College, Boston, USA |
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| Abstract: | EISCAT data taken along the Tromsø geomagnetic field line, on 25 March 1986, 1800–2400 UT, have been used to study the reaction of the neutral atmosphere to temporal and localized energy inputs. A periodic variation of the electron temperature with a period of ~25 min following a temporal heating event is interpreted as being due to a corresponding oscillation of the neutral atmosphere. A model to simulate the dynamic behaviour of the atmosphere is briefly described. The observations can well be explained provided the energy deposition is localized. Then horizontal gradients and thus horizontal atmospheric motions are established and these also affect the amplitude and period of vertical motions. |
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