DOI: 10.1029/2018JA025680
Scopus记录号: 2-s2.0-85052450435
论文题名: Influence of Solar Activity on Penetration of Traveling Planetary-Scale Waves From the Troposphere Into the Thermosphere
作者: Koval A.V. ; Gavrilov N.M. ; Pogoreltsev A.I. ; Shevchuk N.O.
刊名: Journal of Geophysical Research: Space Physics
ISSN: 21699380
出版年: 2018
卷: 123, 期: 8 起始页码: 6888
结束页码: 6903
语种: 英语
英文关键词: atmospheric dynamics
; general circulation
; modeling
; planetary waves
; solar activity
英文摘要: 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. ©2018. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/113410
Appears in Collections: 气候减缓与适应
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作者单位: Department of Atmospheric Physics, Saint-Petersburg State University, St. Petersburg, Russian Federation; Department of Meteorological Forecasts, Russian State Hydrometeorological University, Saint-Petersburg, Russian Federation
Recommended Citation:
Koval A.V.,Gavrilov N.M.,Pogoreltsev A.I.,et al. Influence of Solar Activity on Penetration of Traveling Planetary-Scale Waves From the Troposphere Into the Thermosphere[J]. Journal of Geophysical Research: Space Physics,2018-01-01,123(8)