Modeling Water and Heat Balance of the Boreal Landscape—Comparison of Forest and Arable Land in Scandinavia

• DOI: 10.1175/jam2163.1
• Publication Date: 2004-12-17T20:25:15Z
• Authors: David Gustafsson; Elisabet Lewan; Per-Erik Jansson
• Keywords: Arable land; Interception; Water balance

Abstract The water and heat balances of an arable field a forest in the boreal zone Scandinavia were explored using 3 yr observations simulations with two different soil–vegetation–atmosphere transfer (SVAT) models over 30-yr period. Results from detailed mechanistic model [coupled mass (COUP)] compared those obtained large-scale type SVAT used weather prediction at European Centre for Medium-Range Weather Forecasts [ECMWF tiled land surface scheme (TESSEL)]. COUP agreed well seasonal perspective. TESSEL differed significantly measurements when standard operational parameter values used. introduction variation leaf-area index values, tuned canopy resistance forest, reduced roughness length snow-covered open discrepancies. Net radiation was 40% higher land, based on both models. Furthermore, net source sensible flux, whereas sink. Because treatment winter interception evaporation, latent flux considerably exceeded that model, suggested total annual evaporation than land. representation winter, as dynamics vegetation properties are, thus, considerable importance adequate simulation energy fluxes within zone.