Finn Søraass bilde
Finn
Søraas
Professor emeritus
Besøksadresse: 
Allegt. 55
5020 BERGEN
Postadresse: 
Postboks 7803
5020 BERGEN
Telefon: 
+47 55 58 27 14
Last ned visittkort
Bøker
  • Asikainen, Timo; Mursula, Kalevi; Kerttula, Raine; Friedel, Reiner; Baker, Daniel; Søraas, Finn; Fennell, J. F.; Blake, J. B. 2005. Global view of energetic particles during a major magnetic storm. American Geophysical Union (AGU). 8 sider.
  • Sandanger, Marit Irene J.; Søraas, Finn; Aarsnes, Kjell; Oksavik, Kjellmar; Evans, D. S.; Greer, M. S. 2005. Proton Injections Into the Ring Current Associated With Bz Variations During HILDCAA Events. American Geophysical Union (AGU). 7 sider.
  • Søraas, Finn; Aarsnes, Kjell; Carlsen, Dag Vartdal; Oksavik, Kjellmar; Evans, D. S. 2005. Ring current behavior as revealed by energetic proton precipitation. American Geophysical Union (AGU). 12 sider.
  • Søraas, Finn. 2000. Auroral protons, ENA and Doppler shifted hydrogenlines, artikkel i "Historen om Andøya Rakettskytefelt". ISBN: 82-994583-1-5.
  • Lockwood, M; Fuselier, S.; Walker, A. D. M.; Søraas, Finn. 1998. A summary of NATO ASI on polar cap boundary phenomena.
Tidsskriftartikler
  • Kozyra, Janet U.; Liemohn, Michael W.; Cattell, Cynthia A.; De Zeeuw, Darren Lee; Escoubet, Christophe Philippe; Evans, David S.; Fang, Xiaohua; Fok, Meiching; Frey, Harald U.; Gonzalez, Walter Demetrio; Hairston, Mark R.; Heelis, Roderick A.; Lu, Gang; Manchester, Chip; Mende, Stephen B.; Paxton, Larry J.; Rastaetter, Lutz; Ridley, Aaron J.; Sandanger, Marit Irene J.; Søraas, Finn; Sotirelis, Thomas S.; Thomsen, Michelle F.; Tsurutani, Bruce T.; Verkhoglyadova, Olga P. 2014. Solar filament impact on 21 January 2005: Geospace consequences. Journal of Geophysical Research - Biogeosciences. 119: 5401-5448. doi: 10.1002/2013JA019748
  • 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. 2013. Multi-instrument observations from Svalbard of a traveling convection vortex, electromagnetic ion cyclotron wave burst, and proton precipitation associated with a bow shock instability. Journal of Geophysical Research - Space Physics. 118: 2975-2997. doi: 10.1002/jgra.50291
  • Goldstein, Jerry; McComas, David J.; Valek, Philip; Redfern, Jillian; Søraas, Finn; Bazell, David. 2013. Local-time-dependent low-altitude ion spectra deduced from TWINS ENA images. Journal of Geophysical Research - Space Physics. 118: 2928-2950. doi: 10.1002/jgra.50222
  • Søraas, Finn; Laundal, Karl Magnus; Usanova, Maria E. 2013. Coincident particle and optical observations of nightside subauroral proton precipitation. Journal of Geophysical Research - Space Physics. 118: 1112-1122. doi: 10.1002/jgra.50172
  • Søraas, Finn; Sørbø, Marita. 2013. Low altitude observations of ENA from the ring current and from the proton oval. Journal of Atmospheric and Solar-Terrestrial Physics. 99: 104-110. doi: 10.1016/j.jastp.2012.10.003
  • Tyssøy, Hilde Nesse; Stadsnes, Johan; Søraas, Finn; Sørbø, Marita. 2013. Variations in cutoff latitude during the January 2012 solar proton event and implication for the distribution of particle energy deposition. Geophysical Research Letters. 40: 4149-4153. doi: 10.1002/grl.50815
  • Daae, Marianne; Espy, Patrick Joseph; Tyssøy, Hilde Nesse; Newnham, David; Stadsnes, Johan; Søraas, Finn. 2012. The effect of energetic electron precipitation on middle mesospheric night-time ozone during and after a moderate geomagnetic storm. Geophysical Research Letters. 39. doi: 10.1029/2012GL053787
  • Bugiolacchi, Roberto; Mall, Urs; Bhatt, Megha; McKenna-Lawlor, Susan; Banaszkiewicz, Marek; Brønstad, Kjell; Nathues, Andreas; Søraas, Finn; Ullaland, Kjetil; Pedersen, Rolf B. 2011. An in-depth look at the lunar crater Copernicus: Exposed mineralogy by high-resolution near-infrared spectroscopy. Icarus (New York, N.Y. 1962). 213: 43-63. doi: 10.1016/j.icarus.2011.02.023
  • Usanova, Maria E.; Mann, Ian R.; Kale, Zoe C.; Rae, I. Jonathan; Sydora, Richard D.; Sandanger, Marit Irene J.; Søraas, Finn; Glassmeier, Karl-Heinz; Fornaçon, Karl-Heinz; Matsui, Hiroshi; Puhl-Quinn, Pamela A.; Masson, Arnaud; Vallières, Xavier. 2010. Conjugate ground and multisatellite observations of compression-related EMIC Pc1 waves and associated proton precipitation. Journal of Geophysical Research - Space Physics. 115. 14 sider. doi: 10.1029/2009JA014935
  • Mall, Urs; Brønstad, Kjell; Ullaland, Kjetil; Søraas, Finn; Nathues, Andreas; Banaszkiewicz, Marek; McKenna-Lawlor, Susan; Vilenius, Esa. 2009. Near Infrared Spectrometer SIR-2 on Chandrayaan-1. Current Science. 96: 506-511.
  • Pollock, CJ; Isaksson, A; Jahn, JM; Søraas, Finn; Sørbø, Marita. 2009. Remote global-scale observations of intense low-altitude ENA emissions during the Halloween geomagnetic storm of 2003. Geophysical Research Letters. 36. 5 sider. doi: 10.1029/2009GL038853
  • Sandanger, M.I.; Søraas, F.; Sørbø, M.; Aarsnes, K.; Oksavik, Kjellmar; Evans, D.S. 2009. Relativistic electron losses related to EMIC waves during CIR and CME storms. Journal of Atmospheric and Solar-Terrestrial Physics. 71: 1126-1144. doi: 10.1016/j.jastp.2008.07.006
  • Sørbø, Marita; Søraas, Finn; Sandanger, Marit Irene J.; Evans, Dave. 2009. Ring current behaviour during corotating interaction region and high speed stream events. Journal of Atmospheric and Solar-Terrestrial Physics. 71: 1103-1125. doi: 10.1016/j.jastp.2008.08.012
  • Sandanger, Marit Irene J.; Søraas, Finn; Aarsnes, Kjell; Oksavik, Kjellmar; Evans, D. S. 2007. Loss of relativistic electrons: Evidence for pitch angle scattering by electromagnetic ion cyclotron waves excited by unstable ring current protons. Journal of Geophysical Research. 112. doi: 10.1029/2006JA012138
  • Sørbø, Marita; Søraas, Finn; Aarsnes, Kjell; Oksavik, Kjellmar; Evans, David S. 2006. Latitude distribution of vertically precipitating energetic neutral atoms observed at low altitudes. Geophysical Research Letters. 33. 4 sider. doi: 10.1029/2005GL025240
  • Tsurutani, Bruce T.; Gonzalez, Walter D.; Gonzalez, Alicia L.C.; Guarnieri, Fernando L.; Gopalswamy, Nat; Grande, Manuel; Kamide, Yohsuke; Kasahara, Yoshiya; Lu, Gang; Mann, Ian; McPherron, Robert L; Søraas, Finn; Vasyliunas, Vytenis M. 2006. Corotating solar wind streams and recurrent geomagnetic activity: A review. Journal of Geophysical Research. 111. doi: 10.1029/2005JA011273
  • Kerttula, Raine; Mursula, Kalevi; Asikainen, Timo; Friedel, Reiner; Baker, Daniel; Søraas, Finn; Fennell, Joe F; Blake, J. B.; Grande, Manuel. 2005. Energetic particle acceleration during a major magnetic storm. Advances in Space Research. 36: 1835-1839. doi: 10.1016/j.asr.2004.03.023
  • Mursula, Kalevi; Kerttula, Raine; Asikainen, Timo; Friedel, Reiner H.; Vaivads, Andris; Søraas, Finn; Grande, Manuel; Carter, Martin; Daly, Patric W; Fritz, Theodore A; Fennell, Joe F; Balogh, Andre. 2005. Cluster/rapid energetic electron observations at the dayside magnetospheric boundary. Advances in Space Research. 36: 1904-1908. doi: 10.1016/j.asr.2004.03.021
  • Sandanger, M. I.; Søraas, F.; Aarsnes, K.; Oksavik, Kjellmar; Evans, D. S.; Greer, M. S. 2005. Proton injections into the ring current associated with Bz variations during HILDCAA events. Geophysical Monograph. 155. 7 sider.
  • Søraas, F.; Aarsnes, K.; Carlsen, D. V.; Oksavik, Kjellmar; Evans, D. S. 2005. Ring current behavior as revealed by energetic proton precipitation. Geophysical Monograph. 155. 11 sider.
  • Oksavik, Kjellmar; Søraas, Finn; Moen, J.; Pfaff, R; Davies, J.A.; Lester, M. 2004. Simultaneous optical, CUTLASS HF radar, and FAST spacecraft observations: signatures of boundary layer processes in the cusp. Annales Geophysicae. 22: 511-525.
  • Søraas, F.; Aarsnes, K.; Oksavik, Kjellmar; Sandanger, M. I.; Evans, D. S.; Greer, M. S. 2004. Evidence for particle injection as the cause of Dst reduction during HILDCAA events. Journal of Atmospheric and Solar-Terrestrial Physics. 66: 177-186.
  • Søraas, Finn; Aarsnes, Kjell; Oksavik, Kjellmar; Sandanger, Marit Irene J.; Evans, D. S.; Greer, M.S. 2004. Evidence for particle injection as the cause of D-st reduction during HILDCAA events. Journal of Atmospheric and Solar-Terrestrial Physics. 66: 177-186.
  • Søraas, Finn; Oksavik, Kjellmar; Aarsnes, Kjell; Evans, D.S.; Greer, M.S. 2003. Storm time equatorial belt - an "image" of RC behavior. Geophysical Research Letters. 30: 1052-1055.
  • Oksavik, Kjellmar; Fritz, Theodore A; Zong, Quigang; Søraas, Finn; Wilken, Berend. 2002. Three-dimensional energetic ion sounding of the magnetopause using Cluster/RAPID. Geophysical Research Letters. 29. 4 sider.
  • Søraas, Finn; Aarsnes, Kjell; Oksavik, Kjellmar; Evans, D. S. 2002. Ring current intensity estimated from low-altitude proton observations. Journal of Geophysical Research. 107. 10 sider.
  • Moen, Jøran; Holtet, Jan Arnstein; Pedersen, Arne; Lybekk, Bjørn; Svenes, Knut; Oksavik, Kjellmar; Denig, William F.; Lucek, E.; Søraas, Finn; André, M. 2001. Cluster boundary-layer measurements and optical observations at magnetically conjugate sites. Annales Geophysicae. 19: 1655-1668.
  • Maynard, N.C.; Burke, W.J.; Pfaff, R.F.; Weber, E.; Ober, D.D.; Weimer, D.R.; Moen, J.; Milan, S.; Måseide, K.; Sandholt, P.E.; Søraas, Finn; Stadsnes, Johan. 2000. Dayside convection with northward IMF: Observations of a sounding rocket from Svalbard. Journal of Geophysical Research. 105: 5245-5263.
  • Maynard, N.C.; Burke, W.J.; Pfaff, R.F.; Weber, E; Ober, D.D.; Weimer, DR; Moen, J.; Milan, S.; Måseide, K.; Sandholt, P.E.; Søraas, Finn; Stadsnes, Johan. 2000. Dayside convection with northward IMF: Observations of a sounding rocket from Svalbard. Journal of Geophysical Research. 105: 5245-5263.
  • Oksavik, Kjellmar; Søraas, Finn; Moen, J.; Burke, W.J. 2000. Optical and particle signatures of magnetospheric boundary layers near magnetic noon: Satellite and ground-based observations. Journal of Geophysical Research. 105: 27555-27568.
  • Oksavik, Kjellmar; Søraas, Finn; Moen, J.; Burke, W.J. 2000. Optical and particle signatures of magnetospheric boundary layers near magnetic noon: Satellite and ground-based observations. Journal of Geophysical Research. 105: 27555-27568.
  • Håland, S.; Søraas, Finn; Ullaland, S. L. 1999. Propagation velocities and dimensions of flux rope formation in the near-earth magnetotail. Geophysical Research Letters. 26: 3269-3272. doi: 10.1029/1999GL003609
  • Håland, Stein Egil; Søraas, Finn; Ullaland, Stein. 1999. Propagation Velocities and Dimensions of Plasmoid Structures in the Near-Earth Magnetotail. Geophysical Research Letters. 26: 3269-3272.
  • Søraas, Finn; Aarsnes, Kjell; Lundblad, J. Å.; Evans, D. S. 1999. Enhanced pitch angle scattering of protons at mid-latitudes during geomagnetic storms. Physics and Chemistry of the Earth, Part C: Solar, Terrestial & Planetary Science. 24: 287-292.
  • Søraas, Finn; Aarsnes, Kjell; Lundblad, Jan Åke; Evans, D. S. 1999. Enhanced pitch angle scattering of protons at mid-latitudes during geomagnetic storms. Physics and Chemistry of the Earth, Part C: Solar, Terrestial & Planetary Science. 287-292.
  • Synnes, S. A.; Søraas, Finn; Hansen, Jan Petter. 1998. Monte-Carlo simulations of proton aurora. Journal of Atmospheric and Solar-Terrestrial Physics. 60: 1695-1705.
  • Synnes, S.A.; Søraas, Finn; Hansen, Jan Petter. 1998. Monte-Carlo simulations of proton aurora. Journal of Atmospheric and Terrestrial Physics.
  • Søraas, Finn; Aarsnes, Kjell; Lundblad, J. Aa.; Evans, D. S. 1998. Enhanced pitch angle scattering of protons at mid-latitudes during geomagnetic storms. Physics and Chemistry of the Earth.
  • Østgaard, Nikolai; Stadsnes, Johan; Aarsnes, Kjell; Søraas, Finn; Måseide, K.; Smith, M.; Sharber, J. 1998. Simultaneous measurements of x-rays and electrons during a pulsating aurora. Annales Geophysicae. 16: 148-160.
  • Østgaard, Nikolai; Stadsnes, Johan; Aarsnes, Kjell; Søraas, Finn; Måseide, K.; Smith, M.; Sharber, J. 1998. Simultaneous Measurements of X-rays and Electrons During a Pulsating Aurora. Annales Geophysicae. 16: 148-160.
  • Wilken, B; Søraas, Finn. 1997. RAPID: The imaging energetic particle spectrometer on cluster. Space Science Reviews. 79: 399-473. doi: 10.1023/A:1004994202296
  • Daglis, I.; Axford, W. I.; Livi, S.; Wilken, B; Grande, M.; Søraas, Finn. 1996. Auroral ionospheric ion feeding of the inner plasma sheet during substroms. Journal of Geomagnetism and Geoelectricity. 48: 729-739.
  • Daglis, I.A.; Axford, W.I.; Livi, S.; Vilken, B.; Grande, M.; Søraas, Finn. 1996. Auroral ionospheric ion feeding of the inner plasma sheet during substorms. Journal of Geomagnetism and Geoelectricity.
  • Søraas, Finn; Aarsnes, Kjell. 1996. Observations of ENA in and near a proton arc. Geophysical Research Letters. 23: 2959-2962.
  • Søraas, Finn; Aarsnes, Kjell. 1996. Observations of ENA in and near a proton arc. Geophysical Research Letters. 23: 2959-2962. doi: 10.1029/96GL02821
  • Søraas, Finn; Måseide, K.; Torheim, P.; Aarsnes, Kjell. 1994. Doppler-shifted auroral H-beta emission: a comparison between obaervatons and calculations. Annales Geophysicae. 12: 1052-1064.
Rapporter/avhandlinger
  • Østgaard, Nikolai; Stadsnes, Johan; Aarsnes, Kjell; Søraas, Finn; Måseide, K.; Smith, M. 1996. PULSAUR II: X-ray Measurements During a Pulsating Aurora. Fysisk institutt, Universitetet i Bergen, Bergen.
  • Østgaard, Nikolai; Stadsnes, Johan; Aarsnes, Kjell; Søraas, Finn; Måseide, K.; Smith, M. 1996. PULSAUR II: X-ray Measurements During a Pulsating Aurora. Fysisk institutt, Universitetet i Bergen, Bergen.
Bokkapitler
  • Søraas, Finn; Sørbø, Marita; Aarsnes, Kjell; Evans, David S. 2006. Ring current behavior inferred from ground magnetic and space observations. kapittel. I:
    • Tsurutani, Bruce T. 2006. Recurrent magnetic storms : corotating solar wind streams. American Geophysical Union (AGU). 340 sider. ISBN: 0-87590-432-7.
  • Asikainen, Timo; Mursula, Kalevi; Kerttula, Raine; Friedel, Reiner; Baker, Daniel; Søraas, Finn; Fennell, Joe F; Blake, J. B. 2005. Global view of energetic particles during a major magnetic storm. kapittel, sider . I:
    • Pulkkinen, Tuija I.; Tsyganenko, Nikolai A.; Friedel, Reiner H. 2005. The inner magnetosphere: physics and modeling. American Geophysical Union (AGU). 318 sider. ISBN: 0-87590-420-3.
  • Sandanger, Marit Irene J.; Oksavik, Kjellmar; Søraas, Finn; Aarsnes, Kjell; Evans, David S.; Greer, M.S. 2005. Proton Injections Into the Ring Current Associated With Bz Variations During HILDCAA Events. kapittel, sider . I:
    • Pulkkinen, Tuija I.; Tsyganenko, Nikolai A.; Friedel, Reiner H. 2005. The inner magnetosphere: physics and modeling. American Geophysical Union (AGU). 318 sider. ISBN: 0-87590-420-3.
  • Søraas, Finn; Aarsnes, Kjell; Carlsen, Dag Vartdal; Oksavik, Kjellmar; Evans, David S. 2005. Ring current behavior as revealed by energetic proton precipitation. kapittel, sider . I:
    • Pulkkinen, Tuija I.; Tsyganenko, Nikolai A.; Friedel, Reiner H. 2005. The inner magnetosphere: physics and modeling. American Geophysical Union (AGU). 318 sider. ISBN: 0-87590-420-3.
  • Søraas, Finn. 2000. Auroral protons, ENA and Doppler shifted hydrogen lines. 202-210. I:
    • Pettersen, Eirk Co. 2000. Historien om Andøya Rakettskytefelt. ISBN: 82-994583-1-5.
  • Lockwood, M.; Fuselier, S.; Walker, A. D. M.; Søraas, Finn. 1998. A summary of NATO ASI on polar cap boundary phenomena. 415-432. I:
    • Moen, J.; Egeland, A.; Lockwood, M. 1998. Polar Cap Boundary Phenomena.

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