Accuracy of the cosmic‐ray soil water content probe in humid forest ecosystems: The worst case scenario

摘要: [1] Soil water content is one of the key state variables in soil-vegetation-atmosphere continuum due to its important role exchange and energy at soil surface. A new promising method measure integral field or small catchment scale cosmic-ray probe (CRP). Recent studies CRP measurements have mainly presented results from test sites located very dry areas agricultural fields with sandy soils. In this study, distributed continuous a wireless sensor network (SoilNet) were used investigate accuracy for determination humid forest ecosystem. Such ecosystems are less favorable applications presence litter layer. addition, lattice carbohydrates organic matter belowground biomass reduce effective depth thus accounted calibration CRP. The hydrogen decreased level neutron count rates also sensitivity probe, which turn resulted an increase measurement uncertainty. This uncertainty was compensated by using longer integration times (e.g., 24 h). For Wustebach site, enabled assessment daily dynamics RMSE about 0.03 cm3/cm3 without explicitly considering By including simulated contents layer calibration, better could be achieved.