Validation practices for satellite soil moisture retrievals: What are (the) errors?

This paper presents a community effort to develop good practice guidelines for the validation of global coarse-scale satellite soil moisture products. We provide theoretical background, a review of state-of-the-art methodologies for estimating errors in soil moisture data sets, practical recommendat...

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Hauptverfasser:	Gruber, Alexander, de Lannoy, Gabriëlle J.M, Albergel, Clément, Al-Yaari, Amen, Brocca, Luca, Calvet, Jean-Christophe, Colliander, Andreas, Cosh, Michael H, Crow, Wade T, Dorigo, Wouter Arnaud, Draper, Clara Sophie, Hirschi, Martin, Kerr, Yann H, Konings, Alexandra G, Lahoz, William A, McColl, Kaighin Alexander, Montzka, Carsten, Muñoz-Sabater, Joaquín, Peng, Jian, Reichle, Rolf H, Richaume, Philippe, Rüdiger, Christoph, Scanlon, Tracy, van der Schalie, Robin, Wigneron, Jean Pierre, Wagner, Wolfgang
Format:	Artikel
Sprache:	eng
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Zusammenfassung:	This paper presents a community effort to develop good practice guidelines for the validation of global coarse-scale satellite soil moisture products. We provide theoretical background, a review of state-of-the-art methodologies for estimating errors in soil moisture data sets, practical recommendations on data pre-processing and presentation of statistical results, and a recommended validation protocol that is supplemented with an example validation exercise focused on microwave-based surface soil moisture products. We conclude by identifying research gaps that should be addressed in the near future.