Access

You are not currently logged in.

Access your personal account or get JSTOR access through your library or other institution:

login

Log in to your personal account or through your institution.

If you need an accessible version of this item please contact JSTOR User Support

Spectral Quality and Absorption of Solar Radiation in a Mountain Birch Forest, Abisko, Sweden

M. Ovhed and B. Holmgren
Arctic and Alpine Research
Vol. 27, No. 4 (Nov., 1995), pp. 380-388
DOI: 10.2307/1552031
Stable URL: http://www.jstor.org/stable/1552031
Page Count: 9
  • Read Online (Free)
  • Subscribe ($19.50)
  • Cite this Item
If you need an accessible version of this item please contact JSTOR User Support
Spectral Quality and Absorption of Solar Radiation in a Mountain Birch Forest, Abisko, Sweden
Preview not available

Abstract

Field measurements of the spectral (300-1100 nm) distribution of the incoming and reflected solar radiant energy above and below the canopy of mountain birch (Betula pubescens ssp. tortuosa) carried out at Abisko, during 1989 and 1990, in the subalpine/subarctic region above the Arctic Circle in northern Scandinavia are used to analyze the solar radiation balance of the birch canopy and the undergrowth, respectively. Complementary laboratory measurements of the optical properties of mountain birch leaves and the woody biomass make it possible to estimate the radiant energy absorbed separately by the leaves and the woody biomass. Depending on forest density, the leaves absorb about 52 to 65% of the incoming photosynthetically active radiation (PAR) above the birch canopy, whereas the woody biomass absorbs 9 to 18%. For the near infrared radiation (NIR, 700-1100 nm) case, the leaves absorb 14% and the woody biomass 19-34%

Page Thumbnails

  • Thumbnail: Page 
380
    380
  • Thumbnail: Page 
381
    381
  • Thumbnail: Page 
382
    382
  • Thumbnail: Page 
383
    383
  • Thumbnail: Page 
384
    384
  • Thumbnail: Page 
385
    385
  • Thumbnail: Page 
386
    386
  • Thumbnail: Page 
387
    387
  • Thumbnail: Page 
388
    388