Nonisothermal effects on water potential measurement in a simple geometry

In nature, unsaturated porous media, like soils or plant tissues, are often submitted to temperature gradients which can trigger water transport. A nanofluidic tool is employed here measure the changes in potential response variations a model geometry. Variations of -7.9 MPa/K observed agreement with previous measurements but differ from simple modeling, pointing at subtle couplings between natural convection and Soret effect play setup.