275 citations · 847 across the 18 of their papers we have counts for
18 papers
Polar ionospheric currents and high temporal resolution geomagnetic field models
Clemens Kloss, Christopher C. Finlay, Karl M. Laundal +1
Estimating high resolution models of the Earth's core magnetic field and its time variation in the polar regions requires that one can adequately account for magnetic signals produ…
Observations of Asymmetric Lobe Convection for Weak and Strong Tail Activity
A. Ohma, N. Østgaard, J. P. Reistad +6
In this study we use high-quality convection data from the Electron Drift Instrument on board Cluster to investigate how near-Earth tail activity affects the average convection pat…
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…
Time-scale dependence of solar wind-based regression models of ionospheric electrodynamics
K. M. Laundal, J. P. Reistad, S. M. Hatch +6
The solar wind influence on geospace can be described as the sum of a directly driven component, or dayside reconnection, and an unloading component, associated with the release of…
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…
Exploring Solar-Terrestrial Interactions via Multiple Observers (A White Paper for the Voyage 2050 long-term plan in the ESA Science Programme)
G. Branduardi-Raymont, M. Berthomier, Y. Bogdanova +24
This paper addresses the fundamental science question: "How does solar wind energy flow through the Earth's magnetosphere, how is it converted and distributed?". We need to underst…
Snakes on a Spaceship - An Overview of Python in Heliophysics
A. G. Burrell, A. Halford, J. Klenzing +7
Computational analysis has become ubiquitous within the heliophysics community. However, community standards for peer-review of codes and analysis have lagged behind these developm…
How the IMF Induces a Local Component During Northward IMF and Characteristic Timescales
P. Tenfjord, N. Østgaard, S. Haaland +7
We use the Lyon-Fedder-Mobarry global magnetohydrodynamics model to study the effects of the interplanetary magnetic field (IMF) component on the coupling between…
Interplanetary Magnetic Field Component Influence on Horizontal and Field-Aligned Currents in the Ionosphere
K. M. Laundal, J. P. Reistad, C. C. Finlay +4
Statistical analyses have shown that the sunward component of the interplanetary magnetic field, (Geocentric Solar Magnetospheric), moderately but significantly af…
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…
Magnetic Coordinate Systems
K. M. Laundal, A. D. Richmond
Geospace phenomena such as the aurora, plasma motion, ionospheric currents and associated magnetic field disturbances are highly organized by Earth's main magnetic field. This is d…
North-South Asymmetries in Earth's Magnetic Field: Effects on High-Latitude Geospace
K. M. Laundal, I. Cnossen, S. E. Milan +5
The solar-wind magnetosphere interaction primarily occurs at altitudes where the dipole component of Earth's magnetic field is dominating. The disturbances that are created in this…
Sunlight effects on the 3D polar current system determined from low Earth orbit measurements
Karl M. Laundal, Christopher C. Finlay, Nils Olsen
Interaction between the solar wind and the Earth's magnetosphere is associated with large-scale currents in the ionosphere at polar latitudes that flow along magnetic field lines (…
Birkeland current effects on high-latitude groundmagnetic field perturbations
K. M. Laundal, S. E. Haaland, N. Lehtinen +8
Magnetic perturbations on ground at high latitudes are directly associated only with the divergence-free component of the height-integrated horizontal ionospheric current, $\textbf…
What is the appropriate coordinate system for magnetometer data when analyzing ionospheric currents?
K. M. Laundal, J. W. Gjerloev
In this paper we investigate which coordinate representation is most appropriate when analyzing ground magnetometer data in terms of ionospheric currents, in particular the westwar…
How the IMF induces a component in the closed magnetosphere and how it leads to asymmetric currents and convection patterns in the two hemispheres
P. Tenfjord, N. Østgaard, K. Snekvik +4
We used the Lyon-Fedder-Mobarry global magnetohydrodynamics model to study the effects of the interplanetary magnetic field (IMF) IMF component on the coupling bet…