Blar i Department of Physics and Technology på forfatter "Asikainen, Timo"
-
Assessing North Atlantic winter climate response to geomagnetic activity and solar irradiance variability
Maliniemi, Ville Aleksi; Asikainen, Timo; Salminen, Antti; Mursula, Kalevi (Peer reviewed; Journal article, 2019)Recent studies suggest a response in the North Atlantic winter circulation which lags by a couple of years with respect to sunspot maximum. This has been explained by two different top‐down mechanisms: a solar wind driven ... -
Comparing the effects of solar-related and terrestrial drivers on the northern polar vortex
Salminen, Antti; Maliniemi, Ville Aleksi; Asikainen, Timo; Mursula, Kalevi (Journal article; Peer reviewed, 2020)Northern polar vortex experiences significant variability during Arctic winter. Solar activity contributes to this variability via solar irradiance and energetic particle precipitation. Recent studies have found that ... -
Dependence of the global dayside reconnection rate on interplanetary magnetic field By and the earth’s dipole tilt
Reistad, Jone Peter; Holappa, Lauri; Ohma, Anders; Gabrielse, Christine; Sur, Dibyendu; Asikainen, Timo; DeJong, Anna (Journal article; Peer reviewed, 2022)In the recent years, significant attention has been given to the combined effect of Interplanetary Magnetic Field (IMF) duskward component (By) and dipole tilt on the global magnetosphere-ionosphere system response. Numerous ... -
The Mansurov effect: Statistical significance and the role of autocorrelation
Edvartsen, Jone Øvretvedt; Maliniemi, Ville Aleksi; Tyssøy, Hilde Nesse; Asikainen, Timo; Hatch, Spencer Mark (Journal article; Peer reviewed, 2022)The Mansurov effect is related to the interplanetary magnetic field (IMF) and its ability to modulate the global electric circuit, which is further hypothesized to impact the polar troposphere through cloud generation ...