Congratulations to Phoebe Aron who defended her dissertation on Wednesday, July 29, 2020

Advisor: Chris Poulsen


This dissertation presents new stable water isotope data to better understand water cycling in deciduous forests (Chapters 2 and 3) and in the central Andes in South America (Chapter 4). Chapter 5 presents and explains variation in the triple oxygen isotope system, which until recently had not been applied to hydrologic problems but can add important information about water cycling. These chapters include new observations of high temporal resolution water vapor isotopes and a global dataset of precipitation and surface water isotope variability that is built on citizen science and crowdsourced sample collection. Results and implications help constrain local and regional uncertainties in the terrestrial hydrologic cycle.


Note: This defense was held as a Zoom meeting, with 163 participants. This is a record attendance.