title: Reactions of the middle atmosphere circulation and stationary planetary waves on the solar activity effects in the thermosphere
metadata.name: dc.contributor.author
metadata.value: Koval, Andrey
metadata.lang: -
metadata.name: dc.contributor.author
metadata.value: Gavrilov, Nikolai
metadata.lang: -
metadata.name: dc.contributor.author
metadata.value: Pogoreltsev, Alexander
metadata.lang: -
metadata.name: dc.contributor.author
metadata.value: Shevchuk, Nikita
metadata.lang: -
metadata.name: dc.date.accessioned
metadata.value: 2020-03-26T10:03:41Z
metadata.lang: -
metadata.name: dc.date.available
metadata.value: 2020-03-26T10:03:41Z
metadata.lang: -
metadata.name: dc.date.issued
metadata.value: 2019-12-15
metadata.lang: -
metadata.name: dc.identifier.citation
metadata.value: Koval, A. V., Gavrilov, N. M., Pogoreltsev, A. I., & Shevchuk, N. O. (2019). Reactions of the middle atmosphere circulation and stationary planetary waves on the solar activity effects in the thermosphere. Journal of Geophysical Research: Space Physics, 124, 10645-10658 doi: 10.1029/2019JA027392
metadata.lang: en_GB
metadata.name: dc.identifier.issn
metadata.value: 2169-9380
metadata.lang: -
metadata.name: dc.identifier.uri
metadata.value: http://hdl.handle.net/11701/17282
metadata.lang: -
metadata.name: dc.description.abstract
metadata.value: Using numerical simulations of the general atmospheric circulation during boreal winter, statistically confident evidences are obtained for the first time, demonstrating that changes in the solar activity (SA) in the thermosphere at heights above 100 km can influence propagation and reflection conditions for stationary planetary waves (SPWs) and can modify the middle atmosphere circulation below 100 km. A numerical mechanistic model simulating   atmospheric circulation and SPWs at heights 0 – 300 km is used. To achieve sufficient statistical confidence, 80 pairs of 15-day intervals were extracted from an ensemble of 16 pairs of model runs corresponding to low and high SA. Results averaged over these intervals show that impacts of SA above 100 km change the mean zonal wind and temperature up to 10% at altitudes below 100 km. The statistically confident changes in SPW amplitudes due to SA impacts above 100 km reach up to 50% in the thermosphere and 10 – 15% in the middle atmosphere depending on zonal wavenumber. Changes in wave amplitudes correspond to variations of the EP-flux and may alter dynamical and thermal SPW impacts on the mean wind and temperature. Thus, variable conditions of SPW propagation and reflection at thermospheric altitudes may influence the middle atmosphere circulation, thermal structure and planetary waves.
metadata.lang: en_GB
metadata.name: dc.description.sponsorship
metadata.value: Russian Science Foundation (grant #18-77-00022); Russian Basic Research Foundation (grant #17-05-00458)
metadata.lang: en_GB
metadata.name: dc.language.iso
metadata.value: en
metadata.lang: en_GB
metadata.name: dc.publisher
metadata.value: John Wiley & Sons ltd.
metadata.lang: en_GB
metadata.name: dc.subject
metadata.value: numerical simulation
metadata.lang: en_GB
metadata.name: dc.subject
metadata.value: thermosphere
metadata.lang: en_GB
metadata.name: dc.subject
metadata.value: middle atmosphere
metadata.lang: en_GB
metadata.name: dc.subject
metadata.value: solar activity
metadata.lang: en_GB
metadata.name: dc.subject
metadata.value: planetary waves
metadata.lang: en_GB
metadata.name: dc.title
metadata.value: Reactions of the middle atmosphere circulation and stationary planetary waves on the solar activity effects in the thermosphere
metadata.lang: en_GB
metadata.name: dc.type
metadata.value: Article
metadata.lang: en_GB
resources.filename: Koval_etal_JGR-2019_compressed.pdf
resources.url: https://dspace.spbu.ru/bitstream/11701/17282/1/Koval_etal_JGR-2019_compressed.pdf
resources.format: Adobe PDF
resources.size: 578,74 kB