Manual measurements taken by Stevens Hydra Probes II, which instantly calculates soil moisture, conductivity, salinity, and temperature as well as supplying the raw voltages and complex permittivity for research applications

Cosmic ray neutron sensors (CRNS) allow to determine field-scale soil moisture content non-invasively due to the dependence of aboveground measured epithermal neutrons on the amount of hydrogen. Because other pools besides soil contain hydrogen (e.g. biomass), it is necessary to consider these for accurate soil moisture content measurements, especially when they are changing dynamically (e.g., arable crops, de- and reforestation). In this study, we compare four approaches for the correction of biomass effects on soil moisture content measurements with CRNS using experiments with three crops (sugar beet, winter wheat and maize) on similar soils: I) site-specific functions based on in-situ measured biomass, II) a generic approach, III) the thermal-to-epithermal neutron ratio (Nr) and IV) the thermal neutron intensity. Calibration of the CRNS during bare soil conditions resulted in root mean square errors (RMSE) of 0.097, 0.041 and 0.019 m3/m3 between estimated and reference soil moisture content of the cropped soils, respectively. Considering in-situ measured biomass for correction reduced the RMSE to 0.015, 0.018 and 0.009 m3/m3. When thermal neutron intensity was considered for correction, similarly accurate results were obtained. Corrections based on Nr and the generic approach were less accurate. We also explored the use of CRNS for biomass estimation. The use of Nr only provided accurate biomass estimates for sugar beet. However, significant site-specific relationships between biomass and thermal neutron intensity were obtained for all three crops. It was concluded that thermal neutron intensity can be used to correct soil moisture content estimates from CRNS and to estimate biomass.

This dataset contains the RAW data of all Cosmic-ray rover measurements during the MOSES test campaign. In total 9 measurements were made.

Manual pyrometers measurement transects of surface temperature at field F10, F11 (vegetated) and F46 (bare soil) (4.7.2018-5.7.2018). Data provided in shapefile format.

RGB and surface temperature maps partially covering the test sites F10 (KIT tower) and F11 (ICOS site) (4.7.2018-5.7.2018).

This meta data entry describes the measurement data from the mobile EC tower of the IBG-3 (FZJ) that was set up in Kleinhau during the 2020 MOSES campaign.

Automated measurements of soil near surface temperature at field F46 that had bare soil conditions at the time of the filed campaign. 5 HOBO Pendant® Temperature loggers were used to take temperature [°C] measurements in a 5 minutes interval (3.7.2018-5.7.2018).

This meta data entry describes all chamber-based soil CO2 efflux measurements in Kleinhau during the 2020 MOSES campaign.

Dati relativi al posizionamento delle stazioni di monitoraggio del sito montano LTER-Italia

abstract