Zobrazeno 1 - 10
of 16
pro vyhledávání: '"Michael Madelaire"'
Autor:
Michael Madelaire, Karl Laundal, Spencer Hatch, Heikki Vanhamäki, Jone Reistad, Anders Ohma, Viacheslav Merkin, Dong Lin
Publikováno v:
Geophysical Research Letters, Vol 51, Iss 8, Pp n/a-n/a (2024)
Abstract The ionospheric convection electric field is often assumed to be a potential field. This assumption is not always valid, especially when the ionosphere changes on short time scales T≲5 min. We present a technique for estimating the inducti
Externí odkaz:
https://doaj.org/article/1eb3777876704ce8adb5f4e1ef943e7f
Publikováno v:
Frontiers in Astronomy and Space Sciences, Vol 9 (2022)
Rapid changes in solar wind dynamic pressure can produce a transient geomagnetic response in the high latitude ionosphere. In this study we carry out a superposed epoch analysis of the geomagnetic response based on 2,058 events. The events are divide
Externí odkaz:
https://doaj.org/article/f5cbbfc767dd46b48dd6ebd9894b590f
Publikováno v:
Frontiers in Astronomy and Space Sciences, Vol 9 (2022)
Polar electrodynamics is largely controlled by solar wind and magnetospheric forcing. Different conditions can make plasma convection and magnetic field disturbances asymmetric between hemispheres. So far, these asymmetries have been studied in isola
Externí odkaz:
https://doaj.org/article/1a67aeb0a79b49199b09340d32f68591
Autor:
Michael Madelaire, Karl M. Laundal, Jone P. Reistad, Spencer M. Hatch, Anders Ohma, Stein Haaland
Publikováno v:
Frontiers in Astronomy and Space Sciences, Vol 9 (2022)
Discontinuities in the solar wind trigger a variety of processes in the magnetosphere-ionosphere system. A rapid increase in solar wind dynamic pressure causes compression of the magnetosphere. This manifests itself as a positive perturbation of the
Externí odkaz:
https://doaj.org/article/5948e023320f4e55b6e40f57f636e2e1
The main driver of the ionospheric dayside dynamics is the interaction between the interplanetary magnetic field (IMF) and the Earth’s magnetic field near the dayside magnetopause, while magnetotail activities control the nightside ionospheric dyna
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7e0ebc97e8941734093b4212a4a94639
https://doi.org/10.5194/egusphere-egu23-6875
https://doi.org/10.5194/egusphere-egu23-6875
Autor:
Karl Laundal, Jone Reistad, Spencer Hatch, Sara Gasparini, Simon Walker, Michael Madelaire, Anders Ohma
The Swarm satellites accurately sample electromagnetic fields in-situ along the satellite tracks, but give little direct information about the spatial structures of the field away from the orbit. By making assumptions about temporal variations, in-si
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c1d17fa5a3973019dafd9a36b3d1cfeb
https://doi.org/10.5194/egusphere-egu23-9113
https://doi.org/10.5194/egusphere-egu23-9113
Autor:
Anders Ohma, Karl Magnus Laundal, Jone Peter Reistad, Spencer Mark Hatch, Michael Madelaire, Sara Gasparini, Margot Decotte, Simon James Walker
The aurora is a visible manifestation of Earth’s coupling to near-Earth space. The emitted light is produced by charged particles that precipitate into the upper atmosphere. These particles are usually located on closed magnetic field lines that co
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2295e29504e38eeafdd48424e25d1158
https://doi.org/10.5194/egusphere-egu23-11679
https://doi.org/10.5194/egusphere-egu23-11679
Autor:
Michael Madelaire, Karl Laundal, Jesper Gjerloev, Spencer Hatch, Jone Reistad, Heikki Vanhamäki, Colin Waters, Anders Ohma, Rafael Mesquita, Viacheslav Merkin
Publikováno v:
Journal of Geophysical Research: Space Physics. 128
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b5a1ed9abecccc22ec0079cb187c0987
https://doi.org/10.1029/2023ja031394
https://doi.org/10.1029/2023ja031394
Autor:
Karl Laundal, Jeng-Hwa Yee, Jesper Gjerloev, Heikki Vanhamäki, Jone Reistad, Michael Madelaire, Kareem Sorathia
The auroral electrojet is traditionally measured remotely with magnetometers on ground or in low Earth orbit (LEO). The sparse spatial coverage of measurements, combined with a vertical distance (~100 km to ground and typically >300 km to LEO satelli
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::344aa23a8d1b692fc56863c15c9dfee7
https://doi.org/10.5194/egusphere-egu21-9255
https://doi.org/10.5194/egusphere-egu21-9255
Autor:
Karl Magnus Laundal, Stein Haaland, Anders Ohma, Reham Elhawary, Jone Peter Reistad, Michael Madelaire, Spencer Hatch
The geospace response to rapid changes in solar wind pressure results in a perturbation of the magnetospheric-ionospheric system. Ground magnetometer stations located at polar latitudes have long been known to measure a sudden impulse only minutes af
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::495c68693f36737a3bf9eabc5dcadba0
https://doi.org/10.5194/egusphere-egu21-7632
https://doi.org/10.5194/egusphere-egu21-7632