User:Evandro C. de Oliveira~enwiki

Part 1: SiB2 Model Formulation
The climatic models in global scale and regional request information accurate of the rates of entrance of heat and humidity and of extraction of amount of movement in the atmosphere limit layer. Such assertions justified the proposal of the Simple Biosphere Model SiB (Sellers et al., 1986), what modeled the vegetation itself and left same the determine the ways as the land surface of the interage with the atmosphere, by means of the radiation absorption, biophysical control of evapotranspiration, momentum transfer, available in the soil humidity and isolation. Ten years later, this representation of the continental surface, where the biosphere had been described in the "realistic" form under the physical aspects and biological for the use in atmospheric general circulation models (GCMs), was reviewed by Sellers et al. (1996a), that incorporated significant improvements whose main changes were: (i) Incorporation of a realistic photosynthesis-conductance canopy model to describe the simultaneous transfers of CO2 and water vapor into out of the vegetation, respectively, doing in this carbon balance in the plant level and not of ecosystem. (ii) Use of data satellite to describe the vegetation phenology, derived of the time-series field of: fraction of photosynthetically active radiation absorbed by the green vegetation canopy, the total LAI and the canopy greenness fraction; (iii) Reduction of the complexity and of the number of entrance parameters; (iv) Reduction of two-story vegetation in SiB for to a single layer in SiB2 was necessary to accommodate the photosynthesis-conductance canopy model and the use of data satellite to specify the parameters of canopy state. In fact, the main motivation for the formulation of the SiB2 was to improve the realism of the model. Providing more realistic estimates of sensible and latent heat fluxes over the continents along with consistent estimates of large-scale carbon assimilation rates, once all those fluxes depend the state of the vegetated surface and of the conditions the atmospheric limit layer.