Observations of radiation exchange above and below Amazonian forest

W. James Shuttleworth

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87 Scopus citations


Measurements of shortwave and longwave components of the radiation budget were made above and below tropical forest in the Amazon Basin for a total duration of 203 hours in September 1983. Albedo was (12.25±0.2)%, and showed a small variation with solar altitude. The net outward flux of longwave radiation was around 30 W m−2, and fairly constant over the day. The relationship between net radiation, R, and solar radiation, S, was adequately described by the expression R = (0.858±0.006)S ‐ (35.0±1.9) (W m−2). The fraction of solar radiation reaching the bottom of the canopy was low, about one per cent: net radiation in this position was consistent with low soil heat flux and low soil evaporation.

Original languageEnglish (US)
Pages (from-to)1163-1169
Number of pages7
JournalQuarterly Journal of the Royal Meteorological Society
Issue number466
StatePublished - Oct 1984

ASJC Scopus subject areas

  • Atmospheric Science


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