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- Title
ASSESSING THE HEAT FLUX DATASETS MEASURED USING THE EDDY COVARIANCE TECHNIQUE.
- Authors
Dragomir, Carmelia Mariana; Voiculescu, Mirela; Constantin, Daniel Eduard; Georgescu, Lucian Puiu
- Abstract
Fluxes of sensible heat and latent heat storage were analyzed in order to describe the dependence of the energy balance closure on gaps introduced by evaluating for high quality or turbulent conditions. A precise quantification of the ecosystem exchange is important for estimating the natural contribution to climate change. The eddy covariance technique determines the energy balance closure. Uncertain measurements result when underlying hypotheses of the eddycovariance method, like homogeneous atmosphere, are not accomplished. Gaps or missing data derived from instrument failure or unreliable measurements. The main focus of this study is to analyze the quality of datasets for heat fluxes, measured at elevated height above an agricultural area. In this study we used hourly data for three years, measured at the Lutjewad station near the Wadden Sea dike in the north of the Netherlands, at a height of 50 m. We observed that only 42.1% of measurements are valid for sensible heat flux and 37.35% of measurements are valid for latent heat flux. It is also important to note that the average of high quality data was 13.43W/m² instead of 7.58 W/m² for the complete dataset. As concerns latent heat flux, the validated average was 55.1 W/m² instead of 28.18 W/m² for the entire dataset.
- Subjects
HEAT flux measurement; ANALYSIS of covariance; HEAT storage; BIOENERGETICS; EDDY flux
- Publication
Annals of the University Dunarea de Jos of Galati: Fascicle II, Mathematics, Physics, Theoretical Mechanics, 2015, Vol 38, Issue 1, p40
- ISSN
2067-2071
- Publication type
Article