Sim Sphere SVAT model Sim Sphere is available

Sim. Sphere SVAT model Sim. Sphere is available for free from Aberystwyth University, UK: www. aber. ac. uk/simsphere

Sim. Sphere SVAT model It is a 1 -D SVAT, describes the transport of water and energy in a column from the root-zone below the Surface, through the Vegetation, to the lower Atmosphere The processes and quantities are allowed to evolve in time during a day and night (up to 24 hours) – clear sky model Sim. Sphere requires 52 input parameters & produces 29 outputs The underlying constraint in the model is taken as the balance between all the energy fluxes at the earth’s surface Source: Dutton e-education institute, Sim. Sphere workbook

Sim. Sphere SVAT model VERTICAL STRUCTURE: the PBL is divided in 4 layers, of depths variable in time The transition layer: the vertical exchanges are dominated by molecular and radiative effects as well as by vertical wind changes The substrate layer: varies in depth, assumed to have homogeneous properties The surface layer: extends from the top of the transition layer to ~ 50 meters fluxes of heat and water vapor do not vary more than 10% The mixing layer: its height depends upon forcing from below, especially the amount of H Basic structure of the SVAT model (source: Dutton e-education institute, Sim. Sphere workbook)

Sim. Sphere SVAT model Vegetation component: Consists of a single layer of vegetation between atmospheric surface layer and the soil surface layer The vegetation components closely follows the description of Taconet et al. , 1986; Lynn and Carlson (1990) and Carlson and Lynn (1991) Mixed cover: ETbare ETveg Fraction of bare soil: 1. 0 - fveg Fraction of vegetation: fveg Source: Nishida et al. 2003 To account for heterogeneous areas, need to set a fractional vegetation cover Then, the model operates separately for bare soil and vegetation and then blends the radiometric temperatures and the atmospheric fluxes above the canopy according to the bare soil and vegetation fractions

Sim. Sphere SVAT model INPUT PARAMETERS REQUIREMENT FROM THE SVAT

Sim. Sphere SVAT model OUTPUTS SIMULATED FROM THE SVAT

Sim. Sphere SVAT model Sim. Sphere is already used as an educational tool in at least 5 Universities worldwide For a full list of Sim. Sphere publications to day see also: http: //www. aber. ac. uk/simsphere Also, you can join the Linked. In Group: The Sim. Sphere Land * Biosphere Model Users Group *https: //www. linkedin. com/groups? most. Recent=&gid=8238128&trk=my_groups-tile-flipgrp