1 / 7

SimSphere SVAT model

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

pamelahill
Download Presentation

SimSphere SVAT model

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

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

  2. SimSphere SVAT model • It is a 1-D SVAT, describes the transport of water and energyin 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 • SimSphere requires 52 input parameters & produces29outputs • 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, SimSphere workbook

  3. SimSphere 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, SimSphere workbook)

  4. ETbare ETveg Fraction of bare soil: 1.0 - fveg Fraction of vegetation: fveg SimSphere 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) Source: Nishida et al. 2003 • Mixed cover: • 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

  5. SimSphere SVAT model INPUT PARAMETERS REQUIREMENT FROM THE SVAT

  6. SimSphere SVAT model OUTPUTS SIMULATED FROM THE SVAT

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

More Related