Articles | Volume 40, issue 1
https://doi.org/10.5194/angeo-40-151-2022
© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/angeo-40-151-2022
© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
An investigation into the spectral parameters of ultra-low-frequency (ULF) waves in the polar caps and magnetotail
Nataliya Sergeevna Nosikova
CORRESPONDING AUTHOR
Department of General Physics, National Research Nuclear University MEPhI, Moscow, Russia
Laboratory of Physics of the Earth's
Environment, Schmidt Institute of Physics of the Earth of the Russian Academy of
Sciences (IPE RAS), Moscow, Russia
Nadezda Viktorovna Yagova
Laboratory of Physics of the Earth's
Environment, Schmidt Institute of Physics of the Earth of the Russian Academy of
Sciences (IPE RAS), Moscow, Russia
Lisa Jane Baddeley
Arctic Geophysics Department, University Centre in Svalbard, Svalbard, Norway
Birkeland Centre for Space Science, University of Bergen, Bergen,
Norway
Dag Arne Lorentzen
Arctic Geophysics Department, University Centre in Svalbard, Svalbard, Norway
Birkeland Centre for Space Science, University of Bergen, Bergen,
Norway
Dmitriy Anatolyevich Sormakov
Geophysics Department, Arctic and Antarctic Research Institute (AARI),
Sankt-Petersburg, Russia
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Charlotte M. van Hazendonk, Lisa J. Baddeley, Karl M. Laundal, and Noora Partamies
EGUsphere, https://doi.org/10.5194/egusphere-2025-5220, https://doi.org/10.5194/egusphere-2025-5220, 2025
This preprint is open for discussion and under review for Annales Geophysicae (ANGEO).
Short summary
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This study shows the first observations of the upflow of ions in the Earth's ionosphere generated by ultra-low frequency waves. These waves are visible as auroral arcs. Using various instruments and models, their complex dynamics and the coupling between the ionosphere and magnetosphere were highlighted. Results show significant energy dissipation and currents, even from small-scale waves, highlighting the importance of a multi-instrument approach to understanding such phenomena.
Hanne H. Christiansen, Ilkka S. O. Matero, Lisa Baddeley, Kim Holmén, Clara J. M. Hoppe, Maarten J. J. E. Loonen, Rune Storvold, Vito Vitale, Agata Zaborska, and Heikki Lihavainen
Earth Syst. Dynam., 15, 933–946, https://doi.org/10.5194/esd-15-933-2024, https://doi.org/10.5194/esd-15-933-2024, 2024
Short summary
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We provide an overview of the state and future of Earth system science in Svalbard as a synthesis of the recommendations made by the scientific community active in the archipelago. This work helped identify foci for developments of the observing system and a path forward to reach the full interdisciplinarity needed to operate at Earth system science scale. Better understanding of the processes in Svalbard will benefit both process-level understanding and Earth system models.
Anton Goertz, Noora Partamies, Daniel Whiter, and Lisa Baddeley
Ann. Geophys., 41, 115–128, https://doi.org/10.5194/angeo-41-115-2023, https://doi.org/10.5194/angeo-41-115-2023, 2023
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Poleward moving auroral forms (PMAFs) are specific types of aurora believed to be the signature of the connection of Earth's magnetic field to that of the sun. In this paper, we discuss the evolution of PMAFs with regard to their auroral morphology as observed in all-sky camera images. We interpret different aspects of this evolution in terms of the connection dynamics between the magnetic fields of Earth and the sun. This sheds more light on the magnetic interaction between the sun and Earth.
Nadezda Yagova, Alexander Kozlovsky, Evgeny Fedorov, and Olga Kozyreva
Ann. Geophys., 39, 549–562, https://doi.org/10.5194/angeo-39-549-2021, https://doi.org/10.5194/angeo-39-549-2021, 2021
Short summary
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We present a study of ultralow-frequency waves in the ionosphere and on the ground. These waves are very slow (their periods are about several minutes). They are registered on the ground as geomagnetic pulsations. No simple dependence exists between geomagnetic and ionospheric pulsations. Here we study not only selected pulsations with very high amplitudes but also usual pulsations and try to answer the question, which pulsation parameters are favorable for modulation of the ionosphere?
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Short summary
This paper presents a study of millihertz magnetic pulsations seen in the magnetosphere and on the Earth under quiet space weather conditions. We found that these fluctuations appear in the magnetosphere as soon as disturbances with the same frequency vanish in the solar wind. The results of this work show the possibility of a substorm developing under absolutely quiet external conditions and allow us to assume that these pulsations represent a substorm preparatory phase.
This paper presents a study of millihertz magnetic pulsations seen in the magnetosphere and on...