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Nikolai Østgaard

Nikolai Østgaard

D-Index & Metrics

Environmental Sciences

D-Index
45
Citations
6114
World Ranking
6539
National Ranking
78

Overview

Nikolai Østgaard is affiliated with the University of Bergen in Norway. Their research primarily focuses on fields related to physics and astronomy, with significant contributions in subfields including astronomy and astrophysics, materials chemistry, atmospheric science, electrical and electronic engineering, and global and planetary change.

The scientist's work covers multiple specialized topics, such as:

  • Lightning and electromagnetic phenomena
  • Ionosphere and magnetosphere dynamics
  • High voltage insulation and dielectric phenomena
  • Solar and space plasma dynamics
  • Earthquake detection and analysis
  • Atmospheric aerosols and clouds
  • Geomagnetism and paleomagnetism studies

Recent publications by Nikolai Østgaard include:

  • "Blue Optical Observations of Narrow Bipolar Events by ASIM Suggest Corona Streamer Activity in Thunderstorms," 2020, Journal of Geophysical Research Atmospheres
  • "Spectral Observations of Optical Emissions Associated With Terrestrial Gamma-Ray Flashes," 2020, Geophysical Research Letters
  • "Observation of the onset of a blue jet into the stratosphere," 2021, Nature
  • "Very-high-frequency oscillations in the main peak of a magnetar giant flare," 2021, Nature
  • "Optical emissions associated with narrow bipolar events from thunderstorm clouds penetrating into the stratosphere," 2021, Nature Communications

The scientist frequently collaborates with several co-authors, including:

  • Torsten Neubert
  • V. Reglero
  • Olivier Chanrion
  • Francisco J. Gordillo-Vázquez
  • M. Marisaldi

Nikolai Østgaard's publications are commonly found in specific scientific journals and venues such as:

  • Journal of Geophysical Research Atmospheres
  • Zenodo (CERN European Organization for Nuclear Research)
  • Geophysical Research Letters
  • Nature
  • Journal of Geophysical Research Space Physics

Best Publications

  • Overview of Solar Wind–Magnetosphere–Ionosphere–Atmosphere Coupling and the Generation of Magnetospheric Currents

    Stephen Eric Milan;Stephen Eric Milan;Lasse Boy Novock Clausen;John Charles Coxon;Jenny A. Carter

  • X-rays from solar system objects

    Anil Bhardwaj;Ronald F. Elsner;G. Randall Gladstone;Thomas E. Cravens

  • Production altitude and time delays of the terrestrial gamma flashes: Revisiting the Burst and Transient Source Experiment spectra

    Nikolai Østgaard;Thomas Gjesteland;J. Stadsnes;P. H. Connell

  • FAST and IMAGE-FUV observations of a substorm onset

    S. B. Mende;C. W. Carlson;H. U. Frey;L. M. Peticolas

  • Asymmetric auroral intensities in the Earth’s Northern and Southern hemispheres

    K. M. Laundal;N. Østgaard

  • Energy analysis of substorms based on remote sensing techniques, solar wind measurements, and geomagnetic indices

    N. Østgaard;N. Østgaard;J. Stadsnes;R. R. Vondrak

  • Neutral hydrogen density profiles derived from geocoronal imaging

    N. Østgaard;S. B. Mende;H. U. Frey;G. R. Gladstone

  • How the IMF B-y induces a B-y component in the closed magnetosphere and how it leads to asymmetric currents and convection patterns in the two hemispheres

    Paul Tenfjord;Nikolai Østgaard;Kristian Snekvik;Karl Magnus Laundal

  • Interplanetary magnetic field control of the location of substorm onset and auroral features in the conjugate hemispheres

    N. Østgaard;S. B. Mende;H. U. Frey;T. J. Immel

  • Small and meso-scale properties of a substorm onset auroral arc

    H. U. Frey;O. Amm;C. C. Chaston;S. Fu

  • A terrestrial gamma-ray flash and ionospheric ultraviolet emissions powered by lightning

    Torsten Neubert;Nikolai Østgaard;Victor Reglero;Olivier Chanrion

  • Defining and resolving current systems in geospace

    N. Y. Ganushkina;N. Y. Ganushkina;M. W. Liemohn;S. Dubyagin;I. A. Daglis

  • Simultaneous observations of earthward flow bursts and plasmoid ejection during magnetospheric substorms

    J. A. Slavin;D. H. Fairfield;R. P. Lepping;M. Hesse

  • Earthward plasma sheet flows during substorm phases

    L. Juusola;L. Juusola;N. Østgaard;E. Tanskanen;E. Tanskanen;N. Partamies

  • Effects of dead time losses on terrestrial gamma ray flash measurements with the Burst and Transient Source Experiment

    Thomas Gjesteland;Nikolai Østgaard;P. H. Connell;J. Stadsnes

  • First 10 Months of TGF Observations by ASIM

    N. Østgaard;Torsten Neubert;V. Reglero;K. Ullaland

  • A relation between the energy deposition by electron precipitation and geomagnetic indices during substorms

    N. Østgaard;N. Østgaard;R. R. Vondrak;J. W. Gjerloev

  • Observations of non‐conjugate theta aurora

    N. Østgaard;S. B. Mende;H. U. Frey;L. A. Frank

  • Observations and model predictions of substorm auroral asymmetries in the conjugate hemispheres

    N. Østgaard;N. A. Tsyganenko;S. B. Mende;H. U. Frey

  • Simultaneous observations of optical lightning and terrestrial gamma ray flash from space

    N. Østgaard;T. Gjesteland;B. E. Carlson;B. E. Carlson;A. B. Collier

  • How the IMF $\mathit{B}_{y}$ induces a $\mathit{B}_{y}$ 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;K.M. Laundal

Frequent Co-Authors

Stein Haaland
Stein Haaland University of Bergen
Kjellmar Oksavik
Kjellmar Oksavik University of Bergen
Harald U. Frey
Harald U. Frey University of California, Berkeley
Steve E. Milan
Steve E. Milan University of Leicester
S. B. Mende
S. B. Mende University of California, Berkeley
Kjetil Ullaland
Kjetil Ullaland University of Bergen
Steven A. Cummer
Steven A. Cummer Duke University
Marco Tavani
Marco Tavani National Institute for Astrophysics
Jesper Gjerloev
Jesper Gjerloev Johns Hopkins University Applied Physics Laboratory
Hugh J. Christian
Hugh J. Christian University of Alabama in Huntsville

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