Greifswald 2024 – scientific programme
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UP: Fachverband Umweltphysik
UP 2: Soil and Water
UP 2.4: Talk
Monday, February 26, 2024, 17:30–17:45, ELP 6: HS 4
Metrology for multi-scale monitoring of soil moisture — •Markus Köhli for the SoMMet collaboration — Physikalisches Institut, Heidelberg University, Germany
Soil moisture as a key variable in agriculture, forestry, groundwater recharge, weather, climate, and greenhouse gases emission in the environment. Several measurement methods exist on multiple scales, however, poorly harmonized. Despite its significance this lack of precision marginalized the topologically complex assessment of soil moisture. Thus, there is a need to establish the chain of traceability - the metrological determination of uncertainties. In addition, there is an urgent need for real-time, high-quality, temporally and spatially consistent data on soil moisture. Such are needed to optimise water management strategies as well as climate change monitoring, modelling and mitigation. To address these needs, the project ’Soil Moisture Metrology’ (SoMMet) has been set up in the framework of the European Partnership on Metrology. The consortium consists of nine National Metrology Institutes and nine research institutions. Its aim is to develop sound metrological tools and establish a metrological foundation for soil moisture measurement methods. On the point scale (10−1 m - 101 m), novel primary and secondary standards of measurements will be developed specifically for soil samples. On the intermediate range (102 m - 103 m), the metrological basis of the cosmic-ray neutron sensing method will be established, in laboratory and outdoors. On the large scale (103 m - 104 m), satellite-based remote sensing products will be utilized to derive the soil moisture products.
Keywords: Soil Moisture; Metrology; Cross-disciplinary methodology; Cosmic-Ray Neutron Sensing; Remote Sensing