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UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS Guest
2024-11-23 17:49 |
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Conference: Bucharest University Faculty of Physics 2017 Meeting
Section: Atmosphere and Earth Science; Environment Protection
Title:
Surface albedo and vegetation cover importance in atmospheric thermals genesis
Authors:
Cristian V. VRACIU (1), Sabina STEFAN (1)
Affiliation:
1) University of Bucharest, Faculty of Physics, P.O.BOX MG-11, Magurele, Bucharest, Romania
E-mail
cv_vraciu@yahoo.com
Keywords:
albedo,atmospheric thermals,vegetation cover
Abstract:
The aim of this paper is to study how thermal genesis depends on the albedo and the vegetation of the surface. Therefore we analyzed the dependence of difference between the surface and air temperature on albedo and vegetation cover. Soil temperature was calculated using the model of Parton (1984), using data from ERA-Interim. It is noted that auspicious is a soil with large albedo (characteristic of agricultural lands), because they provide a higher heat transfer but also a more chaotic one, an essential condition for the formation of temperature and density gradients. Differences given by albedo are more important as the vegetation is lower, so we have analyzed how the temperature difference between soil and air is influenced by vegetation în different locations and it has been observed that small vegetation differentials on soils with small biomass create more heat transfer that small vegetation differentials on soils with large biomass, which shows that the areas with low vegetation and high albedo (agricultural lands) are most suitable surface for the creation of the thermal convection.
References:
Parton, W.J.1984, Predicting soil temperature in a short grass step. Soil Sci 138, 93-100 pg.
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