Advertisement

Theoretical and Applied Climatology

, Volume 50, Issue 1–2, pp 73–82 | Cite as

Cloud optical properties at Bergen (Norway) based on the analysis of long-term solar irradiance records

  • E. Leontieva
  • K. Stamnes
  • J. A. Olseth
Article

Summary

Ground-based measurements of incoming solar irradiance and cloud observations during a 26 year period (1965–1990) at Bergen, Norway were used in conjunction with a comprehensive radiation model to infer the cloud optical depthτ under completely overcast conditions.

Month-to-month and year-to-year (April through October) statistics of the cloud optical depth and observed cloud forms are presented. Some climate-related features, specifically, diurnal and seasonal variabilities inτ are examined. The effects of local cloudiness are pointed out and discussed. There appears to be a slight trend towards increasing cloud optical depth at noon during the warm period of the year. The possible uncertainties due to unknown size of cloud droplets are analyzed by model simulations. Possible directions for future research are suggested provided more meteorological and/or satellite information is available.

Keywords

Seasonal Variability Solar Irradiance Warm Period Cloud Droplet Radiation Model 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. Borresen, J. A., 1967: Local clouds in the Bergen area.Studies in Meteorology of the Bergen Region., N 3, Norwegian Universities Press. Google Scholar
  2. Coulson, K. L., 1975:Solar and Terrestrial Radiation: Methods and Measurements. New York, Academic Press, 332pp.Google Scholar
  3. Hansen-Bauer, I., 1985: A simple model for diffusion of SO2 in Bergen.Atmos. Environ. 14, 415–422.Google Scholar
  4. Hu, Y. X., Stamnes, K., 1993: An accurate parameterization of the radiative properties of water clouds suitable for use in climate models.J. Climate 6, 728–742.Google Scholar
  5. Leontyeva, E., Stamnes, K., 1994: Estimations of cloudoptical thickness from ground-based measurements of incoming solar radiation in the Arctic.J. Climate 7, 566–578.Google Scholar
  6. Olseth, J. A., Skartveit, A., 1984: A probability density function for daily insolation within the temperate storm belts.Solar Energy 33, 533–542.Google Scholar
  7. Olseth, J. A., Skartveit, A., 1989: Observed and modelled hourly luminous efficacies under arbitrary cloudiness.Solar Energy 42, 221–233.Google Scholar
  8. Røyland, G., 1993:Estimation of Cloud Liquid Water Content by use of Radiative Transfer Model and Observed Global Irradiance. Thesis (in Norwegian), University of Bergen.Google Scholar
  9. Stamnes, K., Tsay, S. C., Wiscombe, W., Jayaweera, K., 1988: Numerically stable algorithm for discrete-ordinate-method radiative transfer in multiple scattering and emitting layered media.Appl. Opt. 27, 2502–2509.Google Scholar
  10. Tsay, S. C., Stamnes, K., Jayaweera, K., 1989: Radiative energy budget in a cloudy and hasy Arctic.J. Atmos. Sci. 46, 1002–1018.Google Scholar
  11. Tselioudis, G., Rossow, W. B., Rind, D., 1992: Global patterns of cloud optical thickness variation with temperature.J. Climate 5, 1484–1495.Google Scholar
  12. University of Bergen, 1965–1990:Radiation Observations in Bergen, Norway. Google Scholar

Copyright information

© Springer-Verlag 1994

Authors and Affiliations

  • E. Leontieva
    • 1
  • K. Stamnes
    • 1
  • J. A. Olseth
    • 2
  1. 1.Geophysical Institute and Department of PhysicsUniversity of Alaska FairbanksUSA
  2. 2.Geophysical InstituteUniversity of Bergen and Norwegian Meteorological InstituteNorway

Personalised recommendations