275 citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- University of BergenNO28 papers
- Johns Hopkins University Applied Physics LaboratoryUS9 papers
- Max Planck Institute for Solar System ResearchDE6 papers
- Norwegian University of Science and TechnologyNO6 papers
- University of LeicesterGB6 papers
- Centre for Arctic Gas Hydrate, Environment and ClimateNO4 papers
- Finnish Meteorological InstituteFI4 papers
- National Institute for AstrophysicsIT4 papers
- NILUNO4 papers
- Brera Astronomical ObservatoryIT3 papers
- British Antarctic SurveyGB3 papers
- Coastal Carolina UniversityUS3 papers
28 papers · 1 filter
Auroral imaging with combined Suomi 100 nanosatellite and ground-based observations: A case study
Esa Kallio, Ari-Matti Harri, Olli Knuuttila +9
Auroras can be regarded as the most fascinating manifestation of space weather and they are continuously observed by ground-based and, nowadays more and more, also by space-based m…
Spatial Variation in the Responses of the Surface External and Induced Magnetic Field to the Solar Wind
R. M. Shore, M. P. Freeman, J. C. Coxon +3
We analyze the spatial variation in the response of the surface geomagnetic field (or the equivalent ionospheric current) to variations in the solar wind. Specifically, we regress…
Interplanetary Magnetic Field Control of PolarIonospheric Equivalent Current System Modes
R. M. Shore, M. P. Freeman, J. W. Gjerloev
We analyze the response of different ionospheric equivalent current modes to variations in the interplanetary magnetic field (IMF) components By and Bz. Each mode comprises a fixed…
Energetic Electron Precipitation Occurrence Rates Determined Using the Syowa East SuperDARN Radar
Emma C. Bland, Noora Partamies, Erkka Heino +2
We demonstrate that the Super Dual Auroral Radar Network (SuperDARN) radar at Syowa station, Antarctica, can be used to detect high frequency radio wave attenuation in the D region…
Gamma Ray Glow Observations at 20-km Altitude
N. Østgaard, H. J. Christian, J. E. Grove +12
In the spring of 2017 an ER-2 aircraft campaign was undertaken over continental United States to observe energetic radiation from thunderstorms and lightning. The payload consisted…
Characteristics of the Flank Magnetopause: THEMIS Observations
S. Haaland, A. Runov, A. Artemyev +1
The terrestrial magnetopause is the boundary that shields the Earth's magnetosphere on one side from the shocked solar wind and its embedded interplanetary magnetic field on the ot…
Patch Size Evolution During Pulsating Aurora
N. Partamies, K. Bolmgren, E. Heino +3
We report both decreasing and increasing trends in the patch sizes during pulsating aurora events. About 150 pulsating auroral events over the Fennoscandian Lapland have been succe…
Magnetic Effects of Plasma Pressure Gradients in the Upper F Region
K. M. Laundal, S. M. Hatch, T. Moretto
The Swarm satellites fly at altitudes that at polar latitudes are generally assumed to onlycontain currents that are aligned with the local magnetic field. Therefore, disturbances…
Toward a Next Generation Particle Precipitation Model: Mesoscale Prediction Through Machine Learning (a Case Study and Framework for Progress)
Ryan M. McGranaghan, Jack Ziegler, Téo Bloch +7
We advance the modeling capability of electron particle precipitation from the magnetosphere to the ionosphere through a new database and use of machine learning (ML) tools to gain…
A Study of Automatically Detected Flow Channels in the Polar Cap Ionosphere
K. Herlingshaw, L. J. Baddeley, K. Oksavik +2
This paper presents a new algorithm for detecting high-speed flow channels in the polar cap. The algorithm was applied to Super Dual Auroral Radar Network data, specifically to dat…
Separation and Quantification of Ionospheric Convection Sources: 1. A New Technique
J. P. Reistad, K. M. Laundal, N. Østgaard +4
This paper describes a novel technique that allows separation and quantification of different sources of convection in the high-latitude ionosphere. To represent the ionospheric co…
Separation and Quantification of Ionospheric Convection Sources: 2. The Dipole Tilt Angle Influence on Reverse Convection Cells During Northward IMF
J. P. Reistad, K. M. Laundal, N. Østeward +5
This paper investigates the influence of Earth's dipole tilt angle on the reverse convection cells (sometimes referred to as lobe cells) in the Northern Hemisphere ionosphere durin…
Directed Network of Substorms Using SuperMAG Ground-Based Magnetometer Data
L. Orr, S. C. Chapman, J. W. Gjerloev
We quantify the spatiotemporal evolution of the substorm ionospheric current system utilizing the SuperMAG 100+ magnetometers.We construct dynamical directed networks from this dat…
Cosmic Noise Absorption During Solar Proton Events in WACCM-D and Riometer Observations
Erkka Heino, Pekka T. Verronen, Antti Kero +2
Solar proton events (SPEs) cause large-scale ionization in the middle atmosphere leading to ozone loss and changes in the energy budget of the middle atmosphere. The accurate imple…
Statistical study of auroral omega bands
Noora Partamies, James M. Weygand, Liisa Juusola
The presence of very few statistical studies on auroral omega bands motivated us to test-use a semi-automatic method for identifying large-scale undulations of the diffuse aurora b…
On the contribution of thermal excitation to the total 630.0 nm emissions in the northern cusp ionosphere
Norah Kaggwa Kwagala, Kjellmar Oksavik, Dag A. Lorentzen +1
Direct impact excitation by precipitating electrons is believed to be the main source of 630.0 nm emissions in the cusp ionosphere. However, this paper investigates a different sou…
Two mechanisms of stratospheric ozone loss in the Northern Hemisphere, studied using data assimilation of Odin/SMR atmospheric observations
Kazutoshi Sagi, Kristell Pérot, Donal Murtagh +1
Observations from the Odin/Sub-Millimetre Radiometer (SMR) instrument have been assimilated into the DIAMOND model (Dynamic Isentropic Assimilation Model for OdiN Data), in order t…
Dayside and nightside magnetic field responses at 780 km altitude to dayside reconnection
K. Snekvik, N. Østgaard, P. Tenfjord +4
During southward interplanetary magnetic field, dayside reconnection will drive the Dungey cycle in the magnetosphere, which is manifested as a two-cell convection pattern in the i…
North-south asymmetries in cold plasma density in the magnetotail lobes: Cluster observations
S. Haaland, B. Lybekk, L. Maes +7
In this paper, we present observations of cold (0-70 eV) plasma density in the magnetotail lobes. The observations and results are based on 16 years of Cluster observation of space…
Atmospheric Drag, Occultation 'N' Ionospheric Scintillation (ADONIS) mission proposal
Sebastian Hettrich, Yann Kempf, Nikolaos Perakis +14
The Atmospheric Drag, Occultation 'N' Ionospheric Scintillation mission (ADONIS) studies the dynamics of the terrestrial thermosphere and ionosphere in dependency of solar events o…
Mapping lightning in the sky with a mini array
Martin Füllekrug, Zhongjian Liu, Kuang Koh +6
Mini arrays are commonly used for infrasonic and seismic studies. Here we report for the first time the detection and mapping of distant lightning discharges in the sky with a mini…
Seasonal and diurnal variations in AMPERE observations of the Birkeland currents compared to modeled results
J. C. Coxon, S. E. Milan, J. A. Carter +3
We reduce measurements made by the Active Magnetosphere and Planetary Electrodynamics Response Experiment (AMPERE) to give the total Birkeland (field-aligned) current flowing in bo…
Variable phase propagation velocity for long-range lightning location system
Zhongjian Liu, Kuang Liang Koh, Andrew Mezentsev +3
The electromagnetic wave propagation velocity at low radio frequencies is an important input parameter for lightning location systems that use time of arrival (TOA) method. This ve…
Observations of planetary waves in the mesosphere-lower thermosphere during stratospheric warming events
N. H. Stray, Y. J. Orsolini, P. J. Espy +2
This study investigates the effect of stratospheric sudden warmings (SSWs) on planetary wave (PW) activity in the mesosphere-lower thermosphere (MLT). PW activity near 95 km is der…