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A simple mechanistic model is developed to forecast the minimum temperature reached by the aerial elements of a crop during nocturnal cooling. The model, whose inputs are meteorological data registered at sunset, has two main characteristics: (1) it uses as a framework a two-layer scheme of the...
Advection and inflow effects cause forest edges to experience enhanced dry deposition of atmospheric pollutants. A novel methodology is proposed to parameterise this as a sub-grid scale phenomenon in atmospheric models, based on the calculation of a blending-height based effective roughness...
Understanding how environmental variables affect the processes that regulate the carbon flux over grassland is critical for large-scale modeling research, since grasslands comprise almost one-third of the earth’s natural vegetation. To address this issue, fluxes of CO 2 ( F c , flux toward the...
Soil surface CO 2 efflux ( F c ) in a 45-year-old northern larch forest was continuously measured, using a multichannel automated chamber system, between June and October, 2001. The results were compared with periodic measurements obtained at the same site with an LI-6400 chamber system and an...
Savannas and open grasslands often co-exist in semi-arid regions. Questions that remain unanswered and are of interest to biometeorologists include: how do these contrasting landscapes affect the exchanges of energy on seasonal and annual time scales; and, do biophysical constraints imposed by...
Solar radiation is an important input to crop growth models used for risk management and assessment purposes. Methods are explored to estimate daily solar radiation in the Argentine Pampas, one of the most important agricultural areas in the world. Two scenarios are considered: (i) sunshine...
In this paper, we develop a variant of the energy budget model approach, as presented by Pedro and Gillespie, to model leaf wetness duration for use in forecasting the oilseed diseases, stem canker and light leaf spot. The model overcomes three shortcomings of existing models: (i) the model...
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