MGJ.jpg

Flag icon Flag icon

Magnar Gullikstad Johnsen

Forsker
Fakultehtajođiheaddjit ja bargoveahka NT-fak




Arbeider i CRIStin


  • Edvardsen, Inge; Nyrnes, E; Johnsen, Magnar Gullikstad; Hansen, Truls Lynne; Aarnes, I.. How To Manage Geomagnetic-Field Disturbances in the Northern Auroral Zone To Improve the Accuracy of Magnetic Measurement-While-Drilling Directional Surveys. SPE Drilling & Completion 2019; Volum 43 (2). ISSN 1064-6671.s 159 - 172.s doi: 10.2118/189668-PA.

  • Ohtani, Shinici; Gjerløv, Jesper; Johnsen, Magnar Gullikstad; Yamauchi, Masatoshi; Brändström, Urban; Lewis, Andrew M.. Solar illumination dependence of the auroral electrojet intensity: Interplay between the solar zenith angle and dipole tilt. Journal of Geophysical Research (JGR): Space Physics 2019. ISSN 2169-9380.s 1 - 18.s doi: 10.1029/2019JA026707.

  • Barthélemy, Mathieu; Lamy, Hervé; Vialatte, Anne; Johnsen, Magnar Gullikstad; Cessateur, G; Zaourar, N. Measurement of the polarisation in the auroral N 2 427.8 nm band. Journal of Space Weather and Space Climate 2019; Volum 9. ISSN 2115-7251.s doi: 10.1051/swsc/2019024.

  • Hall, Chris; Johnsen, Magnar Gullikstad. Possible influence of variations in the geomagnetic field on migration paths of snow buntings. International Journal of Astrobiology 2019. ISSN 1473-5504.s doi: 10.1017/S1473550419000193.

  • Mann, Ingrid; Kauristie, Kirsti; Bamford, Ruth; McCrea, Ian; Moen, Jøran Idar; Oksavik, Kjellmar; Yamauchi, Masanori; Johnsen, Magnar Gullikstad; Turunen, Esa. Challenges and Strategic Research Plans for Earth and Heliosphere: Research Infrastructures, Projects and Initiatives. (fulltekst) Proceedings of the International Astronomical Union 2018; Volum 13 (S335). ISSN 1743-9213.s 219 - 225.s doi: 10.1017/S1743921318000571.

  • Yamauchi, M; Sergiengko, Timothy; Enell, Carl-Fredrik; Schillings, A.; Slapak, R.; Johnsen, Magnar Gullikstad; Tjulin, A.; Nilsson, H.. Ionospheric response observed by EISCAT during the September 6‐8, 2017, space weather event: overview. Space Weather: The international journal of research and applications 2018. ISSN 1542-7390.s 1437 - 1450.s doi: 10.1029/2018SW001937.

  • Kwagala, Norah Kaggwa; Oksavik, Kjellmar; Lorentzen, Dag Arne; Johnsen, Magnar Gullikstad; Laundal, Karl Magnus. Seasonal and solar cycle variations of thermally excited 630.0 nm emissions in the polar ionosphere. (fulltekst) Journal of Geophysical Research (JGR): Space Physics 2018; Volum 123. ISSN 2169-9380.s 7029 - 7039.s doi: 10.1029/2018JA025477.

  • Lee, Young-Sook; Kim, Young Ha; Kim, Kyung-Chan; Kwak, Young-Sil; Sergiengko, Timothy; Kirkwood, Sheila; Johnsen, Magnar Gullikstad. EISCAT Observation of Wave‐Like Fluctuations in Vertical Velocity of Polar Mesospheric Summer Echoes Associated With a Geomagnetic Disturbance. Journal of Geophysical Research (JGR): Space Physics 2018; Volum 123 (6). ISSN 2169-9380.s 5182 - 5194.s doi: 10.1029/2018JA025399.

  • Yagova, Nadezda; Nosikova, Natalia; Baddeley, Lisa; Kozyreva, Olga; Lorentzen, Dag Arne; Pilipenko, Vyacheslav; Johnsen, Magnar Gullikstad. Non-triggered auroral substorms and long-period (1–4 mHz) geomagnetic and auroral luminosity pulsations in the polar cap. (fulltekst) Annales Geophysicae 2017; Volum 35 (3). ISSN 0992-7689.s 365 - 376.s doi: 10.5194/angeo-35-365-2017.

  • Kwagala, Norah Kaggwa; Oksavik, Kjellmar; Lorentzen, Dag Arne; Johnsen, Magnar Gullikstad. How often do thermally excited 630.0 nm emissions occur in the Polar Ionosphere?. (fulltekst) Journal of Geophysical Research (JGR): Space Physics 2017; Volum 123 (1). ISSN 2169-9380.s 698 - 710.s doi: 10.1002/2017JA024744.

  • Kwagala, Norah Kaggwa; Oksavik, Kjellmar; Lorentzen, Dag Arne; Johnsen, Magnar Gullikstad. On the contribution of thermal excitation to the total 630.0 nm emissions in the northern cusp ionosphere. (fulltekst) Journal of Geophysical Research (JGR): Space Physics 2016; Volum 122. ISSN 2169-9380.s 1234 - 1245.s doi: 10.1002/2016JA023366.

  • Edvardsen, Inge; Johnsen, Magnar Gullikstad; Løvhaug, Unni Pia. Effects of substorm electrojet on declination along concurrent geomagnetic latitudes in the northern auroral zone. Journal of Space Weather and Space Climate 2016; Volum 6:A37. ISSN 2115-7251.s 1 - 16.s doi: 10.1051/swsc/2016031.

  • Lilensten, Jean; Barthélemy, Mathieu; Besson, Gérard; Lamy, Hervé; Johnsen, Magnar Gullikstad; Moen, Jøran Idar. The thermospheric auroral red line Angle of Linear Polarization. Journal of Geophysical Research (JGR): Space Physics 2016; Volum 121 (7). ISSN 2169-9380.s doi: 10.1002/2016JA022941.

  • Ahmed, Abu Baker E.; Tiwari, Rajesh N.; Strangeways, Hal J.; Dlay, Satnam Singh; Johnsen, Magnar Gullikstad. Wavelet-based analogous phase scintillation index for high latitudes. Space Weather: The international journal of research and applications 2015; Volum 13 (8). ISSN 1542-7390.s 503 - 520.s doi: 10.1002/2015SW001183.

  • Lilensten, J.; Bommier, V.; Barthelemy, M; Lamy, Herve; Bernard, D; Moen, Jøran Idar; Johnsen, Magnar Gullikstad; Løvhaug, Unni Pia; Pitout, Frederic. The auroral red line polarisation: modelling and measurements. Journal of Space Weather and Space Climate 2015; Volum 5 (A26). ISSN 2115-7251.s doi: 10.1051/swsc/2015027.

  • Hashimoto, Ayumi; Shiokawa, Kazuo; Otsuka, Yuichi; Oyama, Shin-Ichiro; Nozawa, Satonori; Hori, Tomoaki; Lester, Mark; Johnsen, Magnar Gullikstad. Statistical study of auroral fragmentation into patches. Journal of Geophysical Research (JGR): Space Physics 2015; Volum 120 (8). ISSN 2169-9380.s 6207 - 6217.s doi: 10.1002/2015JA021000.

  • Holmes, Jeffrey Morgan; Johnsen, Magnar Gullikstad; Deehr, Charles Sterling; Zhou, Xiaoyan; Lorentzen, Dag Arne. Circumpolar ground-based optical measurements of proton and electron shock aurora. Journal of Geophysical Research (JGR): Space Physics 2014; Volum 119. ISSN 2169-9380.s 3895 - 3914.s doi: 10.1002/2013JA019574.

  • Edvardsen, Inge; Johnsen, Magnar Gullikstad; Hansen, Truls Lynne; Løvhaug, Unni Pia; Matzka, Jürgen. Improving the Accuracy and Reliabilityof MWD/Magnetic-Wellbore-DirectionalSurveying in the Barents Sea. SPE Drilling & Completion 2014. ISSN 1064-6671.s 215 - 225.s doi: 10.2118/166226-MS.

  • Xiong, Chao; Lühr, Hermann; Wang, Hui; Johnsen, Magnar Gullikstad. Determining the boundaries of the auroral oval from CHAMP field-aligned current signatures - Part 1. Annales Geophysicae 2014; Volum 32 (6). ISSN 0992-7689.s 609 - 622.s doi: 10.5194/angeo-32-609-2014.

  • Edvardsen, Inge; Nyrnes, Erik; Johnsen, Magnar Gullikstad; Hansen, Truls Lynne; Løvhaug, Unni Pia; Matzka, Jürgen. Improving the Accuracy and Reliability of MWD Magnetic Wellbore Directional Surveying in the Barents Sea. Society of Petroleum Engineers 2013 ISBN 978-1-61399-240-1.s doi: 10.2118/166226-MS.

  • Posch, Jennifer L.; Engebretson, Mark J.; Witte, Andrew James; Murr, David L.; Lessard, Marc R.; Johnsen, Magnar Gullikstad; Singer, Howard J.; Hartinger, Michael D.. Simultaneous traveling convection vortex events and Pc1 wave bursts at cusp latitudes observed in Arctic Canada and Svalbard. Journal of Geophysical Research (JGR): Space Physics 2013; Volum 118 (10). ISSN 2169-9380.s 6352 - 6363.s doi: 10.1002/jgra.50604.

  • Johnsen, Magnar Gullikstad. Real-time determination and monitoring of the auroral electrojet boundaries. (fulltekst) Journal of Space Weather and Space Climate 2013; Volum 3. ISSN 2115-7251.s doi: 10.1051/swsc/2013050.

  • Engebretson, Mark J.; Yeoman, Timothy Kenneth; Oksavik, Kjellmar; Søraas, Finn; Sigernes, Fred; Moen, Jøran Idar; Johnsen, Magnar Gullikstad; Pilipenko, Viacheslav A.; Posch, Jennifer L.; Lessard, Marc R.; Lavraud, Benoit; Hartinger, Michael D.; Clausen, Lasse Boy Novock; Raita, Tero; Stolle, Claudia. Multi-instrument observations from Svalbard of a traveling convection vortex, electromagnetic ion cyclotron wave burst, and proton precipitation associated with a bow shock instability. (fulltekst) Journal of Geophysical Research (JGR): Space Physics 2013; Volum 118 (6). ISSN 2169-9380.s 2975 - 2997.s doi: 10.1002/jgra.50291.

  • Johnsen, Magnar Gullikstad; Lorentzen, Dag Arne. A statistical analysis of the optical dayside open/closed field line boundary. Journal of Geophysical Research (JGR): Space Physics 2012; Volum 117. ISSN 2169-9380.s doi: 10.1029/2011JA016984.

  • Dahlgren, Hanna; Semeter, Joshua; Hosokawa, Keisuke; Nicolls, M.J.; Butler, T. W.; Johnsen, Magnar Gullikstad; Shiokawa, K.; Heinselman, C. J.. Direct three-dimensional imaging of polar ionospheric structures with the Resolute Bay Incoherent Scatter Radar. Geophysical Research Letters 2012; Volum 39. ISSN 0094-8276.s doi: 10.1029/2012GL050895.

  • Johnsen, Magnar Gullikstad; Lorentzen, Dag Arne; Holmes, Jeffrey Morgan; Løvhaug, Unni Pia. A model based method for obtaining the open/closed field line boundary from the cusp auroral 6300 angstrom[OI] red line. Journal of Geophysical Research (JGR): Space Physics 2012; Volum 117. ISSN 2169-9380.s doi: 10.1029/2011JA016980.

  • Johnsen, Magnar Gullikstad; Lorentzen, Dag Arne. The dayside open/closed field line boundary as seen from space- and ground-based instrumentation. Journal of Geophysical Research (JGR): Space Physics 2012; Volum 117 (A3). ISSN 2169-9380.s doi: 10.1029/2011JA016983.

  • Lorentzen, Dag Arne; Moen, Jøran Idar; Oksavik, Kjellmar; Sigernes, Fred; Saito, Y.; Johnsen, Magnar Gullikstad. In situ measurement of a newly created polar cap patch. (data) Journal of Geophysical Research (JGR): Space Physics 2010; Volum 115. ISSN 2169-9380.s doi: 10.1029/2010JA015710.

  • Edwards, P. S.; Philbrick, C. R.; Surdal, L. H.; Johnsen, Magnar Gullikstad; Latteck, R.; Baumgarten, G.. The esprit rocket payload launch: Initial comparisons with ground based atmospheric measurements. 2007 ISBN 9789292912116.s 139 - 144.

  • Johnsen, Magnar Gullikstad. Norsk Geofysisk Forening 100 år - En samling artikler i anledning foreningens 100-årsjubileum i 2017. 2017 ISBN 978-82-303-3582-6.s 1 - 21.

  • Nyqvist, Daniel; Forland, Tonje Nesse; Sivle, Lise Doksæter; Durif, Caroline; Johnsen, Magnar Gullikstad; de Jong, Karen. Electric and magnetic senses in marine animals , and potential effects of electromagnetic surveys. Fisk og seismikk 2019 2019-04-24 - 2019-04-25 2019.

  • Kwagala, Norah Kaggwa; Oksavik, Kjellmar; Lorentzen, Dag Arne; Johnsen, Magnar Gullikstad; Laundal, Karl Magnus. Thermally excited 630.0 nm emissions in the polar ionosphere. 19th International EISCAT Symposium 2019 and 46th Annual European Meeting on Atmospheric Studies by Optical Methods 2019-08-19 - 2019-08-23 2019.

  • Edvardsen, Inge; Nyrnes, Erik; Johnsen, Magnar Gullikstad; Hansen, Truls Lynne; Aarnes, I.. How to Manage Geomagnetic Field Disturbances in the Northern AuroralZone to Improve Accuracy of Magnetic MWD Directional Surveys. IADC/SPE Drilling Conference and Exhibition, 6-8 March, Fort Worth, Texas, USA 2018-03-06 - 2018-03-08 2018.

  • Maxwell, Kate; Løvhaug, Unni Pia; Aspaas, Per Pippin; Johnsen, Magnar Gullikstad; Heimtun, Bente; Nylund, Per helge. Nordlyset hjemme – Nordlysvitenskap og UiT i 100 år. Nordlyset hjemme – Nordlysvitenskap og UiT i 100 år 2018-11-02 - 2018-11-04 2018.

  • Kwagala, Norah Kaggwa; Oksavik, Kjellmar; Lorentzen, Dag Arne; Johnsen, Magnar Gullikstad. Thermally excited 630.0 nm emissions in the polar ionosphere. (fulltekst) (omtale) 2018 ISBN 978-82-308-3702-3.

  • Johnsen, Magnar Gullikstad. Redaktørens forord. 2017 ISBN 978-82-303-3582-6.

  • Johnsen, Magnar Gullikstad. Historisk overblikk: Norsk Geofysisk Forening gjennom 100 år. 2017 ISBN 978-82-303-3582-6.s 1 - 21.

  • Kwagala, Norah Kaggwa; Oksavik, Kjellmar; Lorentzen, Dag Arne; Johnsen, Magnar Gullikstad. Thermally Excited 630.0 nm Emissions in the Polar Ionosphere. 2017 AGU Fall Meeting 2017-12-11 - 2017-12-15 2017.

  • Kwagala, Norah Kaggwa; Oksavik, Kjellmar; Lorentzen, Dag Arne; Johnsen, Magnar Gullikstad. Occurrence and Characteristics of Thermally Excited 630.0 nm Emissions in the Polar Ionosphere. AGU Fall Meeting 2016-12-12 - 2016-12-16 2016.

  • Johnsen, Magnar Gullikstad. Hva er nordlys i dagens vitenskapsforståelse?. Kurs for nordlysguider 2014-10-21 - 2014.

  • Johnsen, Magnar Gullikstad. Hva er nordlys i dagens vitenskapsforståelse?. Kurs for nordlysguider 2014-10-17 - 2014.

  • Johnsen, Magnar Gullikstad. Hva er nordlys i dagens vitenskapsforståelse?. Kurs for nordlysguider 2014-10-16 - 2014.

  • Johnsen, Magnar Gullikstad. Hva er nordlys i dagens vitenskapsforståelse?. Kurs for nordlysguider 2014-10-14 - 2014.

  • Johnsen, Magnar Gullikstad. Hva er nordlys i dagens vitenskapsforståelse?. Forelesning for lærerstudenter 2014-11-11 - 2014.

  • Johnsen, Magnar Gullikstad. Hva er nordlys?. Besøk av Tromsdalen VGS-klasse 2014-12-09 - 2014.

  • Johnsen, Magnar Gullikstad. Romvær som slår ut kompassnåler og strømnett. Besøk hos Tromsøkraft 2014-11-14 - 2014.

  • Johnsen, Magnar Gullikstad; Jacobsen, Knut Stanley. ESA SSA - Service Supporting Resource Exploitation System Operators (RESOSS). European Space Weather Week 11 2014-11-17 - 2014-11-21 2014.

  • Johnsen, Magnar Gullikstad; Thorp Bjørnstad, Nora. Direktesending med nordlys, Nordlysfest i Tromsø. 2014.

  • Johnsen, Magnar Gullikstad; Thonhaugen, Markus. Nordlyset slo ut kompassnåler over hele Nord-Norge. 2014.

  • Johnsen, Magnar Gullikstad; Myreng, Kent-Einar. Største nordlysutbrudd på 25 år - Kan slå ut strømmen. 2014.

  • Johnsen, Magnar Gullikstad; Gustad, Ragnhild. Mindre nordlysaktivitet. 2014.

  • Johnsen, Magnar Gullikstad; nrk, Troms og Finnmark. Nordnytt - Historiske Bygninger. 2014.

  • Johnsen, Magnar Gullikstad; P4, radio. Ekstra mye nordlys i år. 2014.

  • Pettersen, Egil Jens; Johnsen, Magnar Gullikstad. NORDPÅ!En flekk på sola kan gi det sterkeste nordlyset på 25 år. 2014.

  • Johnsen, Magnar Gullikstad. The Dayside Open/Closed Field-line Boundary - Ground-based determination and examination. 40th Anniversary of the Greenland Magnetometer Array and IMAGE 2013 Meeting 2013-05-15 - 2013-05-16 2013.

  • Johnsen, Magnar Gullikstad. Mulig å se nordlys fremover. (fulltekst) 2013.

  • Johnsen, Magnar Gullikstad. Real-time determination and monitoring of the auroral electrojet boundaries. AFFECTS 2nd General Meeting 2013-02-26 - 2013-02-27 2013.

  • Johnsen, Magnar Gullikstad. Real-time determination and monitoring of the auroral electrojet boundaries. AFFECTS User Workshop 2013-02-28 - 2013.

  • Johnsen, Magnar Gullikstad. The Auroral Observatory - History and scientific highlights. Besøk av studenter fra University of St Andrews Astronomy Society 2013-01-23 - 2013.

  • Johnsen, Magnar Gullikstad. Nordlysobservatoriets historie. Besøk av Statens vegvesens trainee-ordning (omtale) 2013-02-12 - 2013.

  • Hoppe, Ulf-Peter; Wilms, H; Sommer, S; Dunker, Tim; Kaifler, B.; Johnsen, Magnar Gullikstad. Can we observe acoustic waves of lowfrequency in the upper mesosphere bylidar or by EISCAT radar?. 5th Network for the Detection of Mesopause Change meeting 2012-05-08 - 2012-05-09 2012.

  • Hoppe, Ulf-Peter; Sommer, S; Wilms, H; Johnsen, Magnar Gullikstad. Observations of Gravity Waves and Infrasound with the EISCAT VHF Radar under PMSE Conditions. Atmospheric dynamics Research Infrastructure in Europe Workshop 2012-09-18 - 2012-09-21 2012.

  • Johnsen, Magnar Gullikstad. The Auroral Observatory - a pictorial history. Åpen dag på Nordlysobservatoriet 2012-08-21 - 2012.

  • Johnsen, Magnar Gullikstad; Hansen, Truls Lynne. Near real-time geomagnetic data for space weather applications in the European Sector. AGU Fall Meeting 2012-12-03 - 2012-12-07 2012.

  • Johnsen, Magnar Gullikstad. Tromsø Geophysical Observatory - Near Real-time Geomagnetic Data Provider for Space Weather Applications in the European Sector. Space Weather and Challenges for Modern Society 2012-10-22 - 2012-10-24 2012.

  • Johnsen, Magnar Gullikstad. Space Weather Nowcasting: Real-time determination of the Aurora oval position by means of geomagnetic measurements. Japan-Norway Symposium on Space Sciences in Polar Region 2012-06-05 - 2012-06-06 2012.

  • Johnsen, Magnar Gullikstad. Polar Cap Patches - tracking and imaging. 10th EISCAT Scientific Oversight Committee meeting 2012-03-29 - 2012-03-30 2012.

  • Johnsen, Magnar Gullikstad. How the Auroral Oval was found. Visiting french school class 2012-01-27 - 2012.

  • Johnsen, Magnar Gullikstad. Tromsø Geophysical Observatory and the calculation of Local Magnetic Indices. 1st AFFECTS General meeting 2012-02-20 - 2012-12-22 2012.

  • Johnsen, Magnar Gullikstad. Tromsø Geophysical Observatory Data provider for ESPAS. ESPAS technical meeting 2012-01-30 - 2012-01-31 2012.

  • Gustad, Ragnhild; Johnsen, Magnar Gullikstad. Lyse tider for Nordlyset. Dagavisen Nordlys 2012.

  • Johnsen, Magnar Gullikstad. The Dayside Open/Closed Field line Boundary Ground-based optical determination and examination. 2011.

  • Brekke, Asgeir; Johnsen, Magnar Gullikstad. EISCAT - a genuine project in the Northern Region. Nordområdekonferansen 2011 2011-11-14 - 2011-11-15 2011.

  • Holmes, Jeffrey Morgan; Johnsen, Magnar Gullikstad; Deehr, C. S.; Lorentzen, Dag Arne. Relative shock-induced proton and electron auroral propagation: combined ground- and space-based optical measurements. AGU Chapman Conference 2011-03-04 - 2011.

  • Johnsen, Magnar Gullikstad. Polar Cap Patches. Student visit to EISCAT 2011-11-21 - 2011.

  • Johnsen, Magnar Gullikstad; Lorentzen, Dag Arne. En statistisk studie av den optiske, ionosfæriske polkalottgrensa på jordens dagside. Norsk Geofysisk Forenings årsmøte 2010-09-16 - 2010.

  • Holmes, Jeffrey Morgan; pedersen, T. R.; Johnsen, Magnar Gullikstad; Esposito, R. Distributed ground-based optical observations of polar cap patches. AGU Fall Meeting 2010-12-13 - 2010-12-17 2010.

  • Johnsen, Magnar Gullikstad; Holmes, Jeffrey Morgan; Løvhaug, Unni Pia; Lorentzen, Dag Arne; Strømme, Anja. A multi radar study of global polar cap patch dynamics and morphology. AGU Fall Meeting 2010-12-13 - 2010-12-17 2010.

  • Johnsen, Magnar Gullikstad; Lorentzen, Dag Arne. An optical, statistical analysis of the dayside open/closed field line boundary. AGU Fall Meeting 2009-12-14 - 2009-12-18 2009.

  • Byhring, Hanne Sigrun; Johnsen, Magnar Gullikstad. Fysikk og Teknologi, Jordobservasjon og Romteknologi. Fysikken i Fokus 2008-11-24 - 2008-12-04 2008.

  • Johnsen, Magnar Gullikstad; Løvhaug, Unni Pia; Lorentzen, Dag Arne; Moen, Jøran Idar. Om bestemmelsen av den ionosfæriske polkallottens grense på jordens dagside. Norsk Geofysisk Forenings årsmøte 2008-09-19 - 2008.

  • Johnsen, Magnar Gullikstad; Løvhaug, Unni Pia; Lorentzen, Dag Arne; Moen, Jøran Idar. On the location of the dayside polar cap boundary - comparison of techniques using optics and incoherent scatter radar. 37th Committee on Space Research (COSPAR) Scientific Assembly 2008-07-13 - 2008-07-20 2008.

  • Johnsen, Magnar Gullikstad; Løvhaug, Unni Pia; Lorentzen, Dag Arne; Moen, Jøran. On the location of the dayside polar cap boundary - comparison of techniques using optics and incoherent scatter radar. 35th Annual Meeting on Atmospheric Studies by Optical Methods 2008-08-24 - 2008-08-29 2008.

  • Johnsen, Magnar Gullikstad. Magnetisk spleising på magnetopausen - Hva så?. Symposiet til Norsk Geofysisk Forening (NGF) 2007-09-19 - 2007-09-21 2007.