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Hourly observations of eddy-covariance water vapour fluxes obtained over a Douglas-fir forest are used to evaluate three transpiration models. The models are (1) the Penman–Monteith model with a Jarvis type of formulation for the canopy resistance, including an explicit function for specific...
Eddy co-variance measurements of water vapour and CO 2 fluxes were performed for 15 months at the Vielsalm experimental site (Belgian Ardennes). The forest is patchy, made up of mixed coniferous (Douglas fir) and deciduous (beech) plots. The experiment was developed as a part of the EUROFLUX and...
Tower and aircraft data from a number of field studies are analyzed to: (1) estimate the roughness lengths for local and area-averaged momentum fluxes over various surface types; (2) examine the applicability of the ψ -stability formulations of Paulson and Dyer for momentum fluxes; (3)...
Surface temperature is a crucial variable linking surface–atmospheric energy exchange, but it is difficult to measure accurately. Remote measurement by infrared (IR) thermometry is often the only viable choice, but is plagued by problems that limit its absolute accuracy. Primary among these are...
Temperate grassland ecosystems are an important component of the global carbon (C) cycle. The Bowen ratio/energy balance (BREB) technique was used to measure CO 2 fluxes over a mixed-grass prairie at Mandan, ND from 24 April to 26 October in 1996–1999. Above-ground biomass and leaf area index...
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