Abstract
Measurements from Northern Finland on radiation and turbulent fluxes over a sparse boreal forest with snow-covered ground were analysed. The measurements represent harsh winter conditions characterized by low sun angles. The absorption of incoming solar radiation in clear skies (turbidity) was found to be a strong function of the solar elevation. At low solar elevation angles, commonly used expressions for turbidity did not fit the measurements well. A simple energy balance type met-processor performed well during daytime, but it was not satisfactory during night time. Simplifications and possible improvements in the energy balance model are discussed.
Original language | English |
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Journal | International Journal of Environment and Pollution |
Volume | 16 |
Issue number | 1-6 |
Pages (from-to) | 550-559 |
ISSN | 0957-4352 |
Publication status | Published - 2001 |
Event | 6th International Conference on Harmonization within Atmospherica Dispersion Modelling for Regulatory Purposes - Rouen, France Duration: 11 Oct 1999 → 14 Oct 1999 Conference number: 6 |
Conference
Conference | 6th International Conference on Harmonization within Atmospherica Dispersion Modelling for Regulatory Purposes |
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Number | 6 |
Country | France |
City | Rouen |
Period | 11/10/1999 → 14/10/1999 |
Keywords
- Meteorological processor
- Sensible and latent heat fluxes
- Solar radiation
- Winter conditions