Water Stable Isotopes in Ecohydrological Field Research: Comparison Between and Destructive Monitoring Methods to Determine Soil Water Isotopic Signatures.

Ecohydrological isotope based field research is often constrained by a lack of temporally explicit soil water data, usually related to the choice of destructive sampling in the field and subsequent analysis in the laboratory. New techniques based on gas permeable membranes allow to sample soil water vapor and infer soil liquid water isotopic signatures. Here, a membrane-based soil water vapor sampling method was tested at a grassland site in Freiburg, Germany.