Results 21 to 30 of about 881 (218)
Solar EUV‐Enhancement and Thermospheric Disturbances
Space Weather, Volume 19, Issue 12, December 2021., 2021 Abstract The increase of energetic electromagnetic flux during solar flares and particle precipitation during geomagnetic activity are among the most important sources of neutral density disturbances to the Earth's thermosphere. However, disentangling the role of X and EUV radiation during solar flares is difficult due to the rarity of sufficiently ...
C. Briand, K. Doerksen, F. Deleflie
wiley +1 more source
An Improved Solar Spectral Irradiance Composite Record
Earth and Space Science, Volume 8, Issue 8, August 2021., 2021 Abstract The solar spectral irradiance (SSI) data set is a key record for studying and understanding the energetics and radiation balance in Earth’s environment. Understanding the long‐term variations of the SSI over time scales of the 11‐years solar activity cycle and longer is critical for many Sun‐climate research topics.
Thomas N. Woods, Matthew T. DeLand
wiley +1 more source
Termination of Solar Cycles and Correlated Tropospheric Variability
Earth and Space Science, Volume 8, Issue 4, April 2021., 2021 Abstract The Sun provides the energy required to sustain life on Earth and drive our planet's atmospheric circulation. However, establishing a solid physical connection between solar and tropospheric variability has posed a considerable challenge. The canon of solar variability is derived from the 400 years of observations that demonstrates the waxing ...
Robert J. Leamon +2 more
wiley +1 more source
MHD turbulence and heating of the open field-line solar corona [PDF]
, 2003 This paper discusses the possibility that heating of the solar corona in open field-line regions emanating from coronal holes is due to a nonlinear cascade, driven by low-frequency or quasi-static magnetohydrodynamic fluctuations.
Dmitruk, Pablo +13 more
core +1 more source
Magnetoacoustic Heating of the Solar Chromosphere
The Astrophysical Journal, 1991 Long-period acoustic waves generated in the solar convection zone can propagate radially outward through the overlying atmosphere and get resonantly absorbed in the magnetic arches of the low-lying chromospheric canopy. The resulting Poynting and acoustic flux that enters the magnetic canopy in the network regions is demonstrated to be adequate to ...
Joseph M. Davila, S. M. Chitre
openaire +1 more source
Phase Mixing of Propagating Alfvén Waves in a Single-fluid Partially Ionized Solar Plasma
The Astrophysical Journal, 2023 The phase mixing of Alfvén waves is one of the most promising mechanisms for the heating of the solar atmosphere. The damping of waves in this case requires small transversal scales, relative to the magnetic field direction; this requirement is achieved ...
M. McMurdo +4 more
doaj +1 more source
Modelling chromospheric evaporation in response to coronal heating [PDF]
, 2018 This thesis presents a new computationally efficient method for modelling the response of the solar corona to the release of energy. During impulsive heating events, the coronal temperature increases which leads to a downward heat flux into the ...
Johnston, Craig David
core +1 more source
HEATING OF THE MAGNETIZED SOLAR CHROMOSPHERE BY PARTIAL IONIZATION EFFECTS [PDF]
The Astrophysical Journal, 2012 Accepted for publication by The Astrophysical ...
E. Khomenko, M. Collados
openaire +3 more sources
Diagnostics of active and eruptive prominences through hydrogen and helium lines modelling [PDF]
, 2008 In this study we show how hydrogen and helium lines modelling can be used to make a diagnostic of active and eruptive prominences. One motivation for this work is to identify the physical conditions during prominence activation and eruption. Hydrogen and
N. Labrosse +5 more
core +1 more source
The Heating of the Quiet Solar Chromosphere [PDF]
Symposium - International Astronomical Union, 1990 The quiet solar chromosphere shows three distinct regions. Ordered according to the strength of the emission from the low and middle chromosphere they are (1) the magnetic elements on the boundary of supergranulation cells, (2) the bright points in the cell interior, and (3) the truly quiet chromosphere, also in the cell interior. The magnetic elements
openaire +1 more source