I look forward to organizing a session for the AGU Fall Meeting 2018 with Natalie Orlowski, Todd Dwason, and Stephen P Good on "Stable Isotopes in the Critical Zone: Methods, Applications and Process Interpretations".
If you use stable isotopes to study the Earth's Critical Zone, we would be happy to receive your abstract before 1st of August here.

The special section on "Stable isotope approaches in vadose zone research" in Vadose Zone Journal is complete and online as open access here, including our study on "Measuring and modelling stable isotopes of mobile and bulk soil water".