1. Department of Environmental Systems Science, ETH Zürich, Physics of Soil and Terrestrial Ecosystems, Zürich, Switzerland
2. Department of Hydrology, University of Bayreuth, Bayreuth Center for Ecology and Environmental Research (BayCEER), Bayreuth, Germany
3. Laboratory for Neutron Scattering and Imaging, Paul Scherrer Institute, Villigen, Switzerland
4. Department of Physical Chemistry II, University of Bayreuth, Bayreuth, Germany