Nine Douwes Dekker School of Geography, Earth and Environmental SciencesPhD student Contact details AddressSchool of Geography, Earth and Environmental SciencesUniversity of Birmingham Edgbaston Birmingham B15 2TT UK Nine Douwes Dekker is a PhD candidate in Physical Geography, supervised by Prof Sami Ullah on a project titled: "Identifying tipping points regulating greenhouse gas emission from soils at two forest free air CO2 enrichment experiments". Doctoral research SupervisorProfessor Sami Ullah