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Towards a Flux-Partitioning Procedure Based on the Direct Use of High-Frequency Eddy-Covariance Data |
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| Authors: | Luigi Palatella Gianfranco Rana Domenico Vitale |
| Institution: | 1. ISAC-CNR, Istituto di Scienze dell’Atmosfera e del Clima, U.O.S. di Lecce, Str. Prov. Lecce-Monteroni km 1,200, Lecce, Italy 2. INFN sez. Lecce, Lecce, Italy 3. CRA-SCA, Consiglio per la Ricerca e la Sperimentazione in Agricoltura, Unità di Ricerca per i Sistemi Colturali degli Ambienti Caldo-Aridi, via C. Ulpiani 5, Bari, Italy 4. DIBAF, Dipartimento per l’Innovazione nei sistemi Biologici, Agroalimentari e Forestali, University of Tuscia, via C. de Lellis, 01100?, Viterbo, Italy |
| Abstract: | Scanlon and Sahu (Water Resour Res 44(10):W10418, 2008) proposed an interesting method to estimate assimilation, respiration, evaporation and transpiration directly using high-frequency eddy-covariance measurements. In this note we critically revise this method and, in particular, using the Descartes’ rule of sign, we show that one branch of solutions can be directly neglected reducing the analytical complexity of the procedure. We also discuss the stability of the results of the method with respect to the input parameters, especially to the water-use efficiency. |
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