Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
Influence of solar activity on penetration of traveling planetary-scale waves from the troposphere into the thermosphere. / Коваль, Андрей Владиславович; Гаврилов, Николай Михайлович; Погорельцев, Александр Иванович; Шевчук, Никита Олегович.
в: Journal of Geophysical Research: Space Physics, Том 123, № 8, 08.2018, стр. 6888-6903.Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
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TY - JOUR
T1 - Influence of solar activity on penetration of traveling planetary-scale waves from the troposphere into the thermosphere
AU - Коваль, Андрей Владиславович
AU - Гаврилов, Николай Михайлович
AU - Погорельцев, Александр Иванович
AU - Шевчук, Никита Олегович
N1 - Koval, A. V., Gavrilov, N. M., Pogoreltsev, A. I., & Shevchuk, N. O. (2018). Influence of solar activity on penetration of traveling planetary-scale waves from the troposphere into the thermosphere. Journal of Geophysical Research: Space Physics, 123. (8), 6888-6903, doi: 10.1029/2018JA025680
PY - 2018/8
Y1 - 2018/8
N2 - In this study, numerical simulations of planetary-scale waves (PSWs), generated in the troposphere, were performed for altitudes from the Earth's surface up to 300 km. The influence of thermospheric effects of solar activity (SA) on the amplitudes and phases of westward traveling PSWs with zonal wave numbers 1 and 2 and periods 4–16 days propagating from the troposphere was simulated. Such simulations for a large number of PSW modes in the thermosphere were made for the first time. The effects of SA changes at altitudes above 100 km were involved in the general circulation model MUAM. The ionospheric conductivities for minimum and maximum SA levels were included into the MUAM. The simulation results were averaged over two ensembles of model runs with different PSW phases for conditions corresponding to the high and low SA levels for January–February. PSW atmospheric refractivity index and Eliassen-Palm flux were calculated. They correspond to simulated changes in PSW amplitudes. Changes in the zonal velocity and temperature caused by the SA variations can modify spatial distributions of the westward traveling PSWs. Wave amplitudes significantly (up to 100%) decrease at the thermospheric heights under high SA, which is accompanied by decreasing vertical component of the Eliassen-Palm flux. The 7-, 10-, and 16-day PSWs could have larger partial reflection and worse propagation conditions than the 4- and 5-day waves in the Southern Hemisphere under the high SA. At altitudes below 100 km, minor differences in zonal velocity and PSW amplitudes between high and low SA are found.
AB - In this study, numerical simulations of planetary-scale waves (PSWs), generated in the troposphere, were performed for altitudes from the Earth's surface up to 300 km. The influence of thermospheric effects of solar activity (SA) on the amplitudes and phases of westward traveling PSWs with zonal wave numbers 1 and 2 and periods 4–16 days propagating from the troposphere was simulated. Such simulations for a large number of PSW modes in the thermosphere were made for the first time. The effects of SA changes at altitudes above 100 km were involved in the general circulation model MUAM. The ionospheric conductivities for minimum and maximum SA levels were included into the MUAM. The simulation results were averaged over two ensembles of model runs with different PSW phases for conditions corresponding to the high and low SA levels for January–February. PSW atmospheric refractivity index and Eliassen-Palm flux were calculated. They correspond to simulated changes in PSW amplitudes. Changes in the zonal velocity and temperature caused by the SA variations can modify spatial distributions of the westward traveling PSWs. Wave amplitudes significantly (up to 100%) decrease at the thermospheric heights under high SA, which is accompanied by decreasing vertical component of the Eliassen-Palm flux. The 7-, 10-, and 16-day PSWs could have larger partial reflection and worse propagation conditions than the 4- and 5-day waves in the Southern Hemisphere under the high SA. At altitudes below 100 km, minor differences in zonal velocity and PSW amplitudes between high and low SA are found.
KW - atmospheric dynamics
KW - general circulation
KW - modeling
KW - planetary waves
KW - solar activity
KW - MESOSPHERE
KW - CIRCULATION
KW - MIDDLE ATMOSPHERE
KW - TIDAL EQUATIONS
KW - MODEL
KW - VARIABILITY
KW - NORTHERN-HEMISPHERE
KW - GRAVITY-WAVE
KW - IONOSPHERE SYSTEM
KW - PROPAGATION
UR - http://www.scopus.com/inward/record.url?scp=85052450435&partnerID=8YFLogxK
U2 - 10.1029/2018JA025680
DO - 10.1029/2018JA025680
M3 - Article
VL - 123
SP - 6888
EP - 6903
JO - Journal of Geophysical Research: Biogeosciences
JF - Journal of Geophysical Research: Biogeosciences
SN - 0148-0227
IS - 8
ER -
ID: 36336796