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2019
1 Marisaldi, Martino; Galli, Marcello; Labanti, C.; Østgaard, Nikolai; Sarria, David; Cummer, Steven A.; Lyu, Fanchao; Lindanger, Anders; Campana, Riccardo; Ursi, Alessandro; Tàvani, Marco; Fuschino, Fabio; Argan, Andrea; Trois, Alessio; Pittori, Carlotta; Verrecchia, Francesco.
On the high-energy spectral component and fine time structure of terrestrial gamma ray flashes. Journal of Geophysical Research (JGR): Atmospheres 2019 ;Volum 124.(14) s. 7484-7497
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2 Neubert, Torsten; Østgaard, Nikolai; Reglero, Victor; Blanc, Elisabeth; Chanrion, Olivier; Oxborrow, Carol Anne; Orr, Astrid; Tacconi, Matteo; Hartnack, Ole; Bhanderi, Dan D.V..
The ASIM mission on the international space station. Space Science Reviews 2019 ;Volum 215:56.(2) s. 1-17
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3 Ohma, Anders.
How Asymmetries in Geospace Evolve During Increased Tail Reconnection. : Universitetet i Bergen 2019 (ISBN 9788230862728)
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4 Ohma, Anders; Østgaard, Nikolai; Reistad, Jone Peter; Tenfjord, Paul; Laundal, Karl Magnus.
How asymmetries in Geospace evolve during increased tail reconnection. Geospace Environment Modeling (GEM) Workshop; 2019-06-24 - 2019-06-28
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5 Ohma, Anders; Østgaard, Nikolai; Reistad, Jone Peter; Tenfjord, Paul; Laundal, Karl Magnus.
How Asymmetries in Geospace Evolve During Substorms. 14th International Conference on Substorms; 2019-09-30 - 2019-10-04
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6 Ohma, Anders; Østgaard, Nikolai; Reistad, Jone Peter; Tenfjord, Paul; Laundal, Karl Magnus; Moretto, Therese; Haaland, Stein; Krcelic, Patrik; Milan, S. E..
Cluster EDI Observations of the Asymmetric Plasma Convection in the Magnetotail Lobes During Different Levels of Tail Reconnection Rate. EGU General Assembly 2019; 2019-04-07 - 2019-04-12
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7 Ohma, Anders; Østgaard, Nikolai; Reistad, Jone Peter; Tenfjord, Paul; Laundal, Karl Magnus; Moretto, Therese; Haaland, Stein; Krcelic, Patrik; Milan, Stephen Eric.
Observations of asymmetric lobe convection for weak and strong tail activity. Journal of Geophysical Research (JGR): Space Physics 2019 ;Volum 124.(12) s. 9999-10017
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8 Ohma, Anders; Østgaard, Nikolai; Reistad, Jone Peter; Tenfjord, Paul; Laundal, Karl Magnus; Moretto, Therese; Haaland, Stein; Krcelic, Patrik; Milan, Stephen Eric.
Observations of Asymmetric Lobe Convection for Weak and Strong Tail Reconnection. 29th Cluster Workshop; 2019-10-07 - 2019-10-11
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9 Reistad, Jone Peter; Laundal, Karl Magnus; Ohma, Anders; Østgaard, Nikolai; Thomas, Evan G.; Haaland, Stein; Oksavik, Kjellmar; Milan, Stephen Eric.
A new way to identify and quantify the sources of ionospheric convection. EGU General Assembly 2019; 2019-04-07 - 2019-04-12
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10 Reistad, Jone Peter; Laundal, Karl Magnus; Ohma, Anders; Østgaard, Nikolai; Thomas, Evan G.; Haaland, Stein; Oksavik, Kjellmar; Milan, Steve.
A new way to identify and quantify the sources of ionospheric convection. SuperDARN Workshop; 2019-06-02 - 2019-06-07
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11 Reistad, Jone Peter; Laundal, Karl Magnus; Østgaard, Nikolai; Ohma, Anders; Haaland, Stein; Oksavik, Kjellmar; Milan, Stephen Eric.
Separation and quantification of ionospheric convection sources: 1. A new technique. Journal of Geophysical Research (JGR): Space Physics 2019 ;Volum 124. s. 6343-6357
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12 Reistad, Jone Peter; Laundal, Karl Magnus; Østgaard, Nikolai; Ohma, Anders; Thomas, Evan G.; Haaland, Stein; Oksavik, Kjellmar; Milan, Stephen Eric.
Quantifying the dipole tilt influence on reverse convection cells during northward IMF using spherical elementary functions. AGU Fall Meeting; 2019-12-09 - 2019-12-13
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13 Reistad, Jone Peter; Laundal, Karl Magnus; Østgaard, Nikolai; Ohma, Anders; Thomas, Evan G.; Haaland, Stein; Oksavik, Kjellmar; Milan, Stephen Eric.
Separation and quantification of ionospheric convection sources: 2. The dipole tilt angle influence on reverse convection cells during northward IMF. Journal of Geophysical Research (JGR): Space Physics 2019 ;Volum 124. s. 6182-6194
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14 Sarria, David; Kochkin, Pavlo; Østgaard, Nikolai; Carlson, Brant Edward; Mezentsev, Andrey; Lehtinen, Nikolai; Marisaldi, Martino; Maiorana, Carolina.
Observation of a Terrestrial Electron Beam during the tropical cyclone Joaninha in March 2019. AGU 2019 Fall Meeting; 2019-12-11 - 2019-12-11
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15 Sarria, David; Kochkin, Pavlo; Østgaard, Nikolai; Lehtinen, Nikolai; Mezentsev, Andrey; Marisaldi, Martino; Carlson, Brant Edward; Maiorana, Carolina; Albrechtsen, Kjetil; Neubert, Torsten; Reglero, Victor; Ullaland, Kjetil; Yang, Shiming; Genov, Georgi; Qureshi, Bilal Hasan; Budtz-Jørgensen, Carl; Kuvvetli, Irfan; Christiansen, Freddy; Chanrion, Olivier; Heumesser, Matthias; Dimitriadou, Krystallia; Navarro-Gonzalez, Javier; Connell, Paul; Eyles, Christopher J.
The First Terrestrial Electron Beam Observed by the Atmosphere-Space Interactions Monitor. Journal of Geophysical Research (JGR): Space Physics 2019 ;Volum 124.(12) s. 10497-10511
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16 Sarria, David; Østgaard, Nikolai; Kochkin, Pavlo; Carlson, Brant Edward; Mezentsev, Andrey; Lehtinen, Nikolai; Marisaldi, Martino; Maiorana, Carolina; Albrechtsen, Kjetil; Neubert, Torsten; Reglero, Victor; Ullaland, Kjetil; Yang, Shiming; Genov, Georgi.
The First Terrestrial Electron Beam Observed by the Atmosphere‐Space Interactions Monitor (ASIM), EGU 2019 Presentation.. EGU 2019; 2019-04-11 - 2019-04-11
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17 Ullaland, Kjetil; Østgaard, Nikolai.
Dropp paraplyen og stå med bena samlet. Her er ni gode råd om lyn.. Aftenposten [Avis] 2019-08-31
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18 Østgaard, Nikolai; Balling, Jan E.; Bjørnsen, Thomas Riis; Brauer, Peter; Budtz-Jørgensen, Carl; Bujwan, Waldemar; Carlson, Brant Edward; Christiansen, Freddy; Connell, Paul; Eyles, Chris; Fehlker, Dominik; Genov, Georgi; Grudzinski, Pawel; Kochkin, Pavlo; Kohfeldt, Anja; Kuvvetli, Irfan; Thomsen, Per Lundahl; Pedersen, Søren Møller; Navarro-Gonzalez, Javier; Neubert, Torsten; Njøten, Kåre; Orleanski, Piotr; Qureshi, Bilal Hasan; Cenkeramaddi, Linga Reddy; Reglero, Victor; Reina, Manuel; Rodrigo, Juan Manuel; Rostad, Maja Elise; Sabau, Maria D.; Kristensen, Steen Savstrup; Skogseide, Yngve; Solberg, Arne Olav; Stadsnes, Johan; Ullaland, Kjetil; Yang, Shiming.
The modular X- and gamma-ray sensor (MXGS) of the ASIM Payload on the International Space Station. Space Science Reviews 2019 ;Volum 215:23.(2) s. 1-28
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19 Østgaard, Nikolai; Christian, Hugh J.; Grove, J. Eric; Sarria, David; Mezentsev, Andrey; Kochkin, Pavlo; Lehtinen, Nikolai; Quick, Mason; Al-Nussirat, Samer; Wulf, Eric; Genov, Georgi; Ullaland, Kjetil; Marisaldi, Martino; Yang, Shiming; Blakeslee, Richard J..
Gamma Ray Glow Observations at 20-km Altitude. Journal of Geophysical Research (JGR): Space Physics 2019 ;Volum 124.(13) s. 7236-7254
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20 Østgaard, Nikolai; Neubert, Torsten; Reglero, Victor; Ullaland, Kjetil; Yang, Shiming; Genov, Georgi; Marisaldi, Martino; Mezentsev, Andrey; Kochkin, Pavlo; Lehtinen, Nikolai; Sarria, David; Qureshi, Bilal Hasan; Solberg, Arne Olav; Maiorana, Carolina; Albrechtsen, Kjetil; Budtz-Jørgensen, Carl; Kuvvetli, Irfan; Christiansen, Freddy; Chanrion, Olivier; Heumesser, Matthias; Navarro-Gonzalez, Javier; Connell, Paul H.; Eyles, Christopher J; Christian, Hugh J.; Al-Nussirat, Samer.
First 10 Months of TGF Observations by ASIM. Journal of Geophysical Research (JGR): Space Physics 2019 ;Volum 124.(24) s. 14024-14036
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2018
21 Albrechtsen, Kjetil; Østgaard, Nikolai; Berge, Nini; Gjesteland, Thomas.
Observationally Weak TGFs in the RHESSI Data. Journal of Geophysical Research (JGR): Atmospheres 2018 ;Volum 124.(1) s. 287-298
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22 Kochkin, Pavlo; Sarria, David; Skeie, Chris Alexander; Van Deursen, Alexander P.J.; de Boer, A; Bardet, Michiel; Allasia, Cedric; Flourens, Franck; Østgaard, Nikolai.
In‐Flight Observation of Positron Annihilation by ILDAS. Journal of Geophysical Research (JGR): Atmospheres 2018 ;Volum 123.(15) s. 8074-8090
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23 Laundal, Karl Magnus; Reistad, Jone Peter; Finlay, Christopher C.; Østgaard, Nikolai; Tenfjord, Paul; Snekvik, Kristian; Ohma, Anders.
Interplanetary Magnetic Field Bx Component Influence on Horizontal and Field-Aligned Currents in the Ionosphere. Journal of Geophysical Research (JGR): Space Physics 2018 ;Volum 123.(5) s. 3360-3379
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24 Lehtinen, Nikolai; Østgaard, Nikolai.
X-ray Emissions in a Multiscale Fluid Model of a Streamer Discharge. Journal of Geophysical Research (JGR): Space Physics 2018 ;Volum 123.(13) s. 6935-6953
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25 Mezentsev, Andrey; Lehtinen, Nikolai; Østgaard, Nikolai; Pérez-Invernón, F. J.; Cummer, Steven A..
Spectral Characteristics of VLF Sferics Associated With RHESSI TGFs. Journal of Geophysical Research (JGR): Atmospheres 2018 ;Volum 123.(1) s. 139-159
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26 Milan, Stephen Eric; Carter, Jennifer Alyson; Sangha, Harneet; Laundal, Karl Magnus; Østgaard, Nikolai; Tenfjord, Paul; Reistad, Jone Peter; Snekvik, Kristian; Coxon, John C.; Korth, Haje; Anderson, Brian J..
Timescales of dayside and nightside field-aligned current response to changes in solar wind-magnetosphere coupling. Journal of Geophysical Research (JGR): Space Physics 2018 ;Volum 123.(9) s. 7307-7319
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27 Ohma, Anders; Østgaard, Nikolai; Reistad, Jone Peter; Tenfjord, Paul; Laundal, Karl Magnus; Snekvik, Kristian; Fillingim, Matthew.
Evolution of asymmetrically displaced footpoints during substorms. EGU General Assembly 2018; 2018-04-08 - 2018-04-13
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28 Ohma, Anders; Østgaard, Nikolai; Reistad, Jone Peter; Tenfjord, Paul; Laundal, Karl Magnus; Snekvik, Kristian; Haaland, Stein; Fillingim, Matthew.
Evolution of Asymmetrically Displaced Footpoints During Substorms. Journal of Geophysical Research (JGR): Space Physics 2018 ;Volum 123.(12) s. 10,030-10,063
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29 Reistad, Jone Peter; Laundal, Karl Magnus; Østgaard, Nikolai; Ohma, Anders; Snekvik, Kristian; Tenfjord, Paul.
Plasma circulation inside the polar cap and lobe reconnection. European Geophysical Union General Assembly; 2018-04-09 - 2018-04-13
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30 Reistad, Jone Peter; Østgaard, Nikolai; Laundal, Karl Magnus; Ohma, Anders; Snekvik, Kristian; Tenfjord, Paul; Grocott, Adrian; Oksavik, Kjellmar; Milan, Steve; Haaland, Stein.
Observations of asymmetries in ionospheric return flow during different levels of geomagnetic activity. Journal of Geophysical Research (JGR): Space Physics 2018 ;Volum 123.(6) s. 4638-4651
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31 Sarria, David; Rutjes, Casper; Diniz, Gabriel; Luque, Alejandro; Ihaddadene, Kevin MA; Dwyer, Joseph R; Østgaard, Nikolai; Skeltved, Alexander Broberg; Ferreira, Ivan S; Ebert, Ute.
Evaluation of Monte Carlo tools for high-energy atmospheric physics II: relativistic runaway electron avalanches. Geoscientific Model Development 2018 ;Volum 11.(11) s. 4515-4535
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32 Skeltved, Alexander Broberg.
Evaluating production scenarios of terrestrial gamma-ray flashes. : University of Bergen 2018 (ISBN 978-82-308-3830-3)
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33 Tenfjord, Paul; Østgaard, Nikolai; Haaland, Stein; Snekvik, Kristian; Laundal, Karl Magnus; Reistad, Jone Peter; Strangeway, Robert J.; Milan, Stephen Eric; Hesse, Michael; Ohma, Anders.
How the IMF By Induces a Local By Component During Northward IMF Bz and Characteristic Timescales. Journal of Geophysical Research (JGR): Space Physics 2018 ;Volum 123.(5) s. 3333-3348
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34 Tenfjord, Paul; Østgaard, Nikolai; Reistad, Jone Peter; Snekvik, Kristian; Haaland, Stein; Milan, Steve; Laundal, Karl Magnus; Hesse, Michael; Strangeway, R. J..
How the IMF BY induces a BY component on closed field lines during northward IMF Bz and characteristic timescales. European Geosciences Union 2018; 2018-04-08 - 2018-04-13
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35 Zhou, Su; Luan, Xiaoli; Søraas, Finn; Østgaard, Nikolai; Raita, Tero.
The detached auroras induced by the solar wind pressure enhancement in both hemispheres from imaging and in situ particle observations. Journal of Geophysical Research (JGR): Space Physics 2018 ;Volum 123.(4) s. 3170-3182
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36 Østgaard, Nikolai; Reistad, Jone Peter; Tenfjord, Paul; Laundal, Karl Magnus; Rexer, Theresa; Haaland, Stein; Snekvik, Kristian; Hesse, Michael; Milan, Stephen Eric; Ohma, Anders.
The asymmetric geospace as displayed during the geomagnetic storm on 17 August 2001. Annales Geophysicae 2018 ;Volum 36.(6) s. 1577-1596
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2017
37 Skeltved, Alexander Broberg; Østgaard, Nikolai; Mezentsev, Andrey; Lehtinen, Nikolai; Carlson, Brant Edward.
Constraints to do realistic modeling of the electric field at the tip of a lightning leader. EGU General Assembly; 2017-04-17 - 2017-04-17
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38 Albrechtsen, Kjetil; Østgaard, Nikolai.
Assessment of the cutoff of a broken power law fitted to RHESSI data. European Geophysical Union fall meeting 2017; 2017-05-23 - 2017-05-28
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39 Albrechtsen, Kjetil; Østgaard, Nikolai; Marisaldi, Martino; Gjesteland, Thomas; Berge, Nini.
Estimating the global production rate of TGFs. American Geophysical Union Fall Meeting 2017; 2017-12-11 - 2017-12-15
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40 Berge, Ninni; Østgaard, Nikolai; Albrechtsen, Kjetil.
Optimization of Selection Criteria for Weak Signal TGFs. EGU General Assembly; 2017-04-17 - 2017-04-17
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41 Gjesteland, Thomas; Østgaard, Nikolai; Bitzer, Phillip; Christian, Hugh J..
On the timing between terrestrial gamma ray flashes, radio atmospherics, and optical lightning emission. Journal of Geophysical Research (JGR): Space Physics 2017 ;Volum 122.(7) s. 7734-7741
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42 Haaland, Stein; Baddeley, Lisa; Olafsson, Kjartan; Østgaard, Nikolai; Partamies, Noora; Tanskanen, Eija I.; Vaivads, Andris.
Looking South for the Northern Lights:Substorm Physics as University Curriculum. International Substrom Conference -ICS13; 2017-09-24 - 2017-09-29
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43 Haaland, Stein; Laundal, Karl Magnus; Lybekk, Bjørn; Baddeley, Lisa; Bjoland, Lindis Merete; Pedersen, Arne; Tenfjord, Paul; Østgaard, Nikolai; Gustavsson, Björn Johan; Reistad, Jone Peter; Snekvik, Kristian; Ohma, Anders.
North-south asymmetries in lobe density: Cluster observations. IAGA Genral Assembly; 2017-08-27 - 2017-09-02
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44 Haaland, Stein; Lybekk, Bjørn; Maes, Lukas; Laundal, Karl Magnus; Baddeley, Lisa; Bjoland, Lindis Merete; Pedersen, Arne; Tenfjord, Paul; Østgaard, Nikolai; Gustavsson, Björn Johan; Reistad, Jone Peter; Snekvik, Kristian; Ohma, Anders.
North-South asymmetries in cold plasma density. 24 Cluster Workshop; 2017-09-11 - 2017-09-15
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45 Haaland, Stein; Lybekk, Bjørn; Maes, Lukas; Laundal, Karl Magnus; Pedersen, Amund; Tenfjord, Paul; Ohma, Anders; Østgaard, Nikolai; Reistad, Jone Peter; Snekvik, Kristian.
North-south asymmetries in cold plasma density in the magnetotail lobes: Cluster observations. Journal of Geophysical Research (JGR): Space Physics 2017 ;Volum 122.(1) s. 136-149
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46 Hesse, Michael; Friis-Christensen, Eigil; Moretto, T; Kuznetsova, M; Østgaard, Nikolai; Tenfjord, Paul; Opgenoorth, H.
Does the Magnetosphere go to Sleep?. Fall Meeting of the American Geophysical Union; 2017-12-01 - 2017-12-15
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47 Hesse, Michael; Kuznetsova, M; Liu, Yi-Hsin; Rastatter, Lutz; Østgaard, Nikolai; Birn, Joachim.
The roles of IMF By, dipole tilt, and conductance differences in establishing nonconjugate auroral features. EGU General Assembly; 2017-04-01 - 2017-04-30
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48 Kochkin, Pavlo; Sarria, David; van Deursen, A.P.J.; de Boer, Alte; Bardet, Michiel; Allasia, Cedric; Boissin, J.-F.; Østgaard, Nikolai.
Positron annihilation in thunderstorms observed by ILDAS.. AGU2017; 2017-12-11 - 2017-12-15
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49 Kochkin, Pavlo; van Deursen, A.P.J.; de Boer, Alte; Bardet, Michiel; Allasia, Cedric; Boissin, J.-F.; Østgaard, Nikolai.
In-flight measurement of high-energy lightning-related atmospheric phenomena. 2017 International Conference on Lightning and Static Electricity; 2017-09-13 - 2017-09-15
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50 Kochkin, Pavlo; van Deursen, A.P.J.; de Boer, Alte; Bardet, Michiel; Allasia, Cedric; Boissin, J.-F.; Østgaard, Nikolai.
In-flight observation of long duration gamma-ray glows by aircraft. EGU2017; 2017-04-23 - 2017-04-28
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