Footprint issues in scintillometry over heterogeneous landscapes

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Abstract

Scintillometry is widely recognized as a potential tool for obtaining spatially aggregated sensible heat fluxes at regional scales. Although many investigations have been made over contrasting component surfaces, few aggregation schemes consider footprint contributions. In this paper, an approach is presented to infer average sensible heat flux over a very heterogeneous landscape by using a large aperture scintillometer. The methodology is demonstrated on simulated data and tested on a time series of measurements obtained during the SPARC2004 experiment in Barrax, Spain. Results show that the two-dimensional footprint approach yields more accurate results of aggregated sensible heat flux than traditional methods.

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Timmermans, W. J., Su, Z., & Olioso, A. (2009). Footprint issues in scintillometry over heterogeneous landscapes. Hydrology and Earth System Sciences, 13(11), 2179–2190. https://doi.org/10.5194/hess-13-2179-2009

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