Kari Alterskjær

Ph.D Research fellow,
aerosol-cloud-climate interactions


University of Oslo, Meteorology and Oceanography Section

Phone: +47-22855775
Email: kari.alterskjar at geo.uio.no
University home page: Kari Alterskjær


Research interests

Clouds and aerosols, aerosol indirect effects, cloud radiative forcing, climate change and variability


Affiliations:

University of Oslo, Department of Geosciences, Meteorology and Oceanography Section


Published material

2013:

  • Alterskjær, K., J. E. Kristjánsson, A. Aaheim, F. Benduhn, O. Boucher, D. Bou Karam, M. Lawrence, H. Muri, U. Niemeier, H. Schmidt6, M. Schulz, C. Timmreck (2013), The transient response in three Earth System Models to a cancellation of 21st century RCP4.5 forcing through sea salt injections into the low-latitude marine boundary layer, in prep.

  • Kravitz, B., P. M. Forster, A. Jones, A. Robock, K. Alterskjær, O. Boucher, J. M. Haywood, A. K. L. Jenkins, H. Korhonen, J. E. Kristjánsson, H. M., U. Niemeier, A.-I. Partanen, P. J. Rasch, H. Wang, and S. Watanabe (2013), Marine Cloud Brightening Related Experiments in the Geoengineering Model Intercomparison Project (GeoMIP): Experiment Design and Preliminary Results, in prep.

  • Tilmes, S., J. Fasullo, J.-F. Lamarque, D. R. Marsh, M. Mills, K. Alterskjær, O. Boucher, J. N. S. Cole, C. L. Curry, J. H. Haywood, P. J. Irvine, D. Ji, A. Jones, D. B. Karam, B. Kravitz, J. E. Kristjánsson, J. Moore, H. O. Muri, U. Niemeier, P. J. Rasch, A. Robock, H. Schmidt, M. Schulz, Y. Shuting, B. Singh, S. Watanabe, J.-H. Yoon (2013), The Hydrological Impact of Geo-Engineering in GeoMIP, J. Geophys. Res., submitted

  • Jones, A., J. M. Haywood, K. Alterskjær, O. Boucher, J. N. S. Cole, C. L. Curry, P. J. Irvine, D. Ji, B. Kravitz, J. E. Kristjánsson, J. C. Moore, U. Niemeier, A. Robock, H. Schmidt, B. Singh, S. Tilmes, S. Watanabe, J.-H. Yoon (2013), The "termination effect" in experiment G2 of the Geoengineering Model Intercomparison Project (GeoMIP), J. Geophys. Res., submitted

  • Kravitz, B. et al. (2013), Climate model response from the Geoengineering Model Intercomparison Project (GeoMIP), J. Geophys. Res., submitted

  • Alterskjær, K. and J. E. Kristjánsson (2013), The sign of the radiative forcing from marine cloud brightening depends on both particle size and injection amount, Geophys. Res. Lett., 40

    • 2012:

  • Schmidt, H., K. Alterskjær, D. Bou Karam, O. Boucher, A. Jones, J. E. Kristjánsson, U. Niemeier, M. Schulz, A. Aaheim, F. Benduhn, M. Lawrence, and C. Timmreck (2012), Solar irradiance reduction to counteract radiative forcing from a quadrupling of CO2: climate responses simulated by four earth system models, Earth Syst. Dynam., 3

  • Alterskjær, K., J. E. Kristjansson, Ø. Seland (2012), Sensitivity to deliberate sea salt seeding of marine clouds - observations and model simulations, Atmos. Chem. Phys., 12

    • 2011:


    2010:

  • Alterskjær, K., J. E. Kristjansson, C. Hoose (2010), Do anthropogenic aerosols enhance or suppress the surface cloud forcing in the Arctic?, J. Geophys. Res. - Atm., 115.

  • Myhre, G., K. Alterskjær, D. Lowe (2010), Addendum to 'A fast method for updating global fossil fuel carbon dioxide emissions', . Env. Res. Lett., 5.(3)

    • 2009:
  • Myhre, G., K. Alterskjær and D. Lowe (2009), A fast method for updating global fossil fuel carbon dioxide emissions, Env. Res. Lett., 4.(3)

  • Kristjansson, J. E., H. Corinna, K. Alterskjær, T. Iversen, A. Kirkevåg, Ø. Seland, J.-P. Chen and A. Hazra (2009), Aerosol indirect effect of the 'wrong' sign. Geochimica et Cosmochimica Acta, 73.(13) s. A697-A697

  • Kristjansson, J. E., C. Hoose, K. Alterskjær (2009), Aerosol indirect effect of the 'wrong' sign. Goldschmidt Conference, 2009-06-21 - 2009-06-26

  • Alterskjær, K. (2009), Simulated Changes in the Radiative Properties of Arctic Stratus due to Anthropogenic Forcing, Master thesis

    Presentations

    Oral presentations:

  • Ungforsk, Oslo 2012: Kan vi motvirke global oppvarming ved å endre skyene?
  • NGF, Geilo 2012: Kan vi motvirke global oppvarming ved å endre skyene?
  • AGU, San Francisco 2011: Global Simulations of Radiative Forcing from Sea Salt Injections: The Effect of Injection Rate and Particle Size
  • KISS workshop on Geo-engineering, Cal. Tech., Pasadena 2011: "Sensitivity to deliberate injections of sea salt into marine clouds - observations and model simulations"
  • Seminar at the University of Washington, Seattle 2011: "Sensitivity to deliberate injections of sea salt into marine clouds - observations and model simulations"
  • AeroCom, Fukuoka 2011: Susceptibility of marine clouds to emission increases - observations and model simulations
  • EGU, Vienna 2011: Sensitivity to deliberate injections of sea salt into marine clouds - observations and simulations
  • NorClim, Voss 2010: "Do Anthropogenic Aerosols Enhance or Suppress the Surface Cloud Forcing in the Arctic?"
  • MOCA-09, the IAMAS-IAPSO-IACS 2009 Joint Assembly, Montreal 2009: "Simulated Changes in the Radiative Properties of Arctic Stratus Due to Anthropogenic Forcing"

    • Posters:

  • ResClim, Bergen 2011: Sensitivity to deliberate injections of sea salt into marine clouds - observations and model simulations
  • ResClim, Geilo 2010: Do anthropogenic aerosols enhance or suppress the surface cloud forcing in the Arctic?


    • Media

  • BBC world news interview: Climate 'technical fix' may yield warming, not cooling
  • NRK P2. Radio interview about climate engineering on the show "Ekko".

    • Teaching

  • GEF4310 - Cloud physics

    • Course notes: GEF4310

  • GEF4510 - Atmosphere and Oceans on Computers: Fundamentals



    • Postal address:
    Kari Alterskjær
    Department of Geosciences
    P.O. box 1022, Blindern
    N-0315 Oslo, Norway     		Visiting address:
    CIENS-building
    Oslo Innovation Centre, house 8, level 4
    Gaustadalleen 21
    N-0349 Oslo, Norway