Estimation of stomatal resistance and canopy evaporation during the HAPEX-MOBILHY experiment

摘要: Abstract Surface energy fluxes can be evaluated from remotely sensed data using models describing the transfers of energy, mass and radiation between soil, vegetation atmosphere. To applied over partial canopies where soil evaporation is comparable with that foliage, these need three key parameters: thermal inertia P , hydraulic diffusivity D w limit E lim which depend on type its moisture parameters; height h leaf area index L minimum resistance to transpiration r s,min physiology vegetation. In this paper, we propose a methodology estimate parameters. The parameters are fitted during period bare soil. parameters, may estimated remote sensing in optical bands mean biophysical relationships. single parameter remains . Assuming constant growing period, it adjusted dense canopy contribution total negligible. This method tested Special Observing Period (SOP) (7 May–15 July 1986) international HAPEX-MOBILHY experiment sites ranged soils covered areas. It shown model able reproduce surface flux components both canopies, partition foliage made, leading monitoring global stomatal through season.