Results 41 to 50 of about 72,728 (314)

Structures in the Outer Solar Atmosphere [PDF]

Space Science Reviews, 2014
The structure and dynamics of the outer solar atmosphere are reviewed with emphasis on the role played by the magnetic field. Contemporary observations that focus on high resolution imaging over a range of temperatures, as well as UV, EUV and hard X-ray spectroscopy, demonstrate the presence of a vast range of temporal and spatial scales, mass motions,
Fletcher, Lyndsay, Cargill, Peter J., Antiochos, Spiro K., Gudiksen, Boris V.   +3 more
openaire   +2 more sources

Polar mesosphere summer echoes during the July 2000 solar proton event [PDF]

, 2004
International audienceThe influence of the solar proton event (SPE) 14?16 July 2000 on Polar Mesosphere Summer Echoes (PMSE) is examined. PMSE were observed by the Esrange VHF MST Radar (ESRAD) at 67°53'N, 21°06'E.
V. Barabash, Feofilov, A., A. Feofilov, Kirkwood, S., Barabash, Victoria,, S. Kirkwood, A. Kutepov, Kutepov, A., Barabash, Victoria, Barabash, V.   +9 more
core   +1 more source

Mesoscale Convective Systems and Extreme Precipitation on the West African Coast Linked to Ocean–Atmosphere Conditions during the Monsoon Period in the Gulf of Guinea

Atmosphere
This study investigates the importance of convective systems for extreme rainfall along the northern coast of the Gulf of Guinea (GG) and their relationship with atmospheric and oceanic conditions.
Sandrine Djakouré, Joël Amouin, Kouassi Yves Kouadio, Modeste Kacou   +3 more
doaj   +1 more source

Solar sail capture trajectories at Mercury

, 2002
Mercury is an ideal environment for future planetary exploration by solar sail since it has proved difficult to reach with conventional propulsion and hence remains largely unexplored.
Macdonald, Malcolm, McInnes, Colin, Mcinnes, C.R., Colin McInnes, Malcolm Macdonald, Macdonald, M.   +5 more
core   +1 more source

Case study of the mesospheric and lower thermospheric effects of solar x-ray flares: Coupled ion-neutral modelling and comparison with EISCAT and riometer measurements [PDF]

, 2008
Two case studies of upper mesospheric and lower thermospheric (UMLT) high-latitude effects of solar X-ray flares are presented. Sodankylä Ion-neutral Chemistry Model (SIC) electron density profiles agree with D-region EISCAT and riometer ...
Beharrell, M.J., A. Seppälä, Verronen, P.T., Seppälä, A., Ulich, T., C.-F. Enell, Enell, C.-F., Honary, F., P. T. Verronen, J. P. Vierinen, T. Ulich, A. Kero, E. Turunen, M. J. Beharrell, Vierinen, J.P., Turunen, E., F. Honary, Kero, A.   +17 more
core   +1 more source

Solar Flare Ribbon Fronts. I. Constraining Flare Energy Deposition with IRIS Spectroscopy

The Astrophysical Journal, 2023
Spectral lines formed at lower atmospheric layers show peculiar profiles at the “leading edge” of ribbons during solar flares. In particular, increased absorption of the BBSO/GST He i λ 10830 line, as well as broad and centrally reversed profiles in the ...
Vanessa Polito, Graham S. Kerr, Yan Xu, Viacheslav M. Sadykov, Juraj Lorincik   +4 more
doaj   +1 more source

Existence of Purely Alvén Waves in Magnetic Flux Tubes with Arbitrary Cross-Sections

Physics, 2022
We study linear torsional Alfvén waves in a magnetic flux tube with an arbitrary cross-section. We assume that the equilibrium magnetic field is propagating in the z-direction in Cartesian coordinates x,y, and z.
Michael S. Ruderman, Nikolai S. Petrukhin   +1 more
doaj   +1 more source

Moreton waves and EUV waves in the solar atmosphere

地球与行星物理论评, 2023
Solar eruptions, which generate various types of wave phenomena in the solar atmosphere, are sources of space weather perturbations. These waves not only transport a large amount of energy, but also illuminate the properties of the magnetic field and ...
Pengfei Chen
doaj   +1 more source

Properties of Flare-imminent versus Flare-quiet Active Regions from the Chromosphere through the Corona. I. Introduction of the AIA Active Region Patches (AARPs)

The Astrophysical Journal, 2023
We begin here a series of papers examining the chromospheric and coronal properties of solar active regions. This first paper describes an extensive data set of images from the Atmospheric Imaging Assembly on the Solar Dynamics Observatory curated for ...
Karin Dissauer, K. D. Leka, Eric L. Wagner   +2 more
doaj   +1 more source

Research progress in coronal magnetic field measurements

地球与行星物理论评, 2022
Different solar atmospheric layers are connected by the magnetic field of the Sun, which is the primary source for various types of solar activity. The magnetic activity of the Sun has a significant impact on the solar-terrestrial environment and human ...
Zihao Yang, Hui Tian, Wenxian Li, Jiale Zhang, Xianyong Bai, Yuhang Gao, Yajie Chen   +6 more
doaj   +1 more source