Mathematics – Logic
Scientific paper
Mar 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011georl..3806404p&link_type=abstract
Geophysical Research Letters, Volume 38, Issue 6, CiteID L06404
Mathematics
Logic
Biogeosciences: Remote Sensing, Biogeosciences: Biosphere/Atmosphere Interactions (0315), Atmospheric Composition And Structure: Aerosols And Particles (0345, 4801, 4906), Atmospheric Composition And Structure: Radiation: Transmission And Scattering, Hydrology: Snow And Ice (0736, 0738, 0776, 1827)
Scientific paper
The fraction of radiation absorbed in the canopy depends on the amount and angular distribution of the solar irradiance reaching the top of the canopy as well as the fraction of this irradiance that is transmitted through the canopy gaps and reflected back to the vegetation by the background. This contribution shows that the presence of snow on forest floors enhances the fraction of absorbed Photosynthetically Active Radiation (PAR). A global analysis of satellite-derived products reveals that this enhancement affects evergreen and deciduous forests of the boreal zone. This snow-related effect may usefully contribute to the photosynthesis process in evergreen forests especially during spring time when radiation conditions are marginal but other physiological constraints (such as temperature) permit the necessary biochemical functions to take place.
Andredakis I.
Arino Olivier
Clerici Matteo
Kaminski Thomas
Pinty Bernard
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