Articles | Volume 27, issue 3
https://doi.org/10.5194/hess-27-723-2023
https://doi.org/10.5194/hess-27-723-2023
Research article
 | 
09 Feb 2023
Research article |  | 09 Feb 2023

Signal contribution of distant areas to cosmic-ray neutron sensors – implications for footprint and sensitivity

Martin Schrön, Markus Köhli, and Steffen Zacharias

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Cited articles

Andreasen, M., Jensen, K. H., Desilets, D., Zreda, M., Bogena, H. R., and Looms, M. C.: Cosmic-ray neutron transport at a forest field site: the sensitivity to various environmental conditions with focus on biomass and canopy interception, Hydrol. Earth Syst. Sci., 21, 1875–1894, https://doi.org/10.5194/hess-21-1875-2017, 2017a. a
Andreasen, M., Jensen, K. H., Desilets, D., Franz, T. E., Zreda, M., Bogena, H. R., and Looms, M. C.: Status and Perspectives on the Cosmic-Ray Neutron Method for Soil Moisture Estimation and Other Environmental Science Applications, Vadose Zone J., 16, vzj2017.04.0086, https://doi.org/10.2136/vzj2017.04.0086, 2017b. a
Baroni, G. and Oswald, S. E.: A scaling approach for the assessment of biomass changes and rainfall interception using cosmic-ray neutron sensing, J. Hydrol., 525, 264–276, https://doi.org/10.1016/j.jhydrol.2015.03.053, 2015. a
Bogena, H. R., Huisman, J. A., Baatz, R., Hendricks-Franssen, H.-J., and Vereecken, H.: Accuracy of the cosmic-ray soil water content probe in humid forest ecosystems: The worst case scenario, Water Resour. Res., 49, 5778–5791, https://doi.org/10.1002/wrcr.20463, 2013. a
Coopersmith, E. J., Cosh, M. H., and Daughtry, C. S.: Field-scale moisture estimates using COSMOS sensors: A validation study with temporary networks and Leaf-Area-Indices, J. Hydrol., 519, 637–643, https://doi.org/10.1016/j.jhydrol.2014.07.060, 2014. a
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Short summary
This paper presents a new analytical concept to answer long-lasting questions of the cosmic-ray neutron sensing community, such as what is the influence of a distant area or patches of different land use on the measurement signal? or is the detector sensitive enough to detect a change of soil moisture (e.g. due to irrigation) in a remote field at a certain distance? The concept may support signal interpretation and sensor calibration, particularly in heterogeneous terrain.