The Hebrew University of Jerusalem invites applications for a fully funded PhD position focused on identifying oceanic sources of carbonyl sulfide (COS) and carbon disulfide (CS2) using sulfur stable isotopes. This research is based at the Edmond J. Safra Campus in Jerusalem, within the Institute of Earth Sciences, a leading center for environmental and Earth system research. The project aims to advance understanding of COS and CS2 sources and sinks in the ocean, which are critical for global biogeochemical cycles and climate regulation. COS, the most abundant long-lived sulfur gas in the atmosphere, plays a key role in stratospheric sulfate aerosol formation and is a promising proxy for terrestrial photosynthesis, influencing atmospheric CO2 levels.

The successful candidate will engage in both laboratory and fieldwork, including sea sampling on research cruises departing from Israel and the USA. The research involves cutting-edge stable isotope measurement techniques and advanced analytical systems, such as IRMS, to analyze sulfur isotope ratios and isotopic fractionation processes. The project is led by Professors Alon Angert and Alon Amrani, both renowned for their expertise in biogeochemical cycles, environmental processes, and geochemistry. Students will benefit from mentorship, interdisciplinary collaboration, and access to state-of-the-art facilities.

The position offers a competitive annual stipend ranging from 96,000 NIS to 120,000 NIS (~29,000 USD to ~36,000 USD) for the initial stage, with increases in advanced stages. The Hebrew University fosters a diverse and inclusive academic environment, welcoming students from all backgrounds and nationalities. Applicants should hold an MSc (with thesis) in a relevant field, possess experience with advanced analytical equipment, and demonstrate motivation, initiative, and teamwork skills.

To apply, candidates must submit a letter of motivation, CV (including publications), and copies of academic degrees via the online application portal. The deadline for applications is December 15, 2025. This opportunity allows students to contribute to impactful research on global change and climate science, while enjoying the vibrant academic and cultural life of Jerusalem.