Melissa Thaw completed her PhD in Environmental Systems at the University of California, Merced in 2019. Melissa’s research in isotope hydrology bridged collaboration between the Southern Sierra Critical Zone Observatory and Lawrence Livermore National Laboratory. As a Lawrence Scholar, Melissa contributed to the development of new field and lab methods for hydrologic tracers sodium-22 and sulfur-35 and gained experience with multiple hydrologic tracers from sample collection and processing, to data analysis. Melissa’s previous experience includes international research in hydrology as a National Science Foundation East Asia and Pacific Summer Institute Fellow, where she collaborated with Hohai University in Nanjing, China. She earned a Master of Science in Water Resources Management from the University of Nevada, Las Vegas in 2013. Melissa has professional experience in non-profit environmental advocacy. As a post-doctoral researcher, Melissa is leading hydrology research at the Jack and Laura Dangermond Preserve, which will contribute to the conservation and understanding of this unique landscape.