I’m supervised by Professor Ros Rickaby and Professor Gideon Henderson, working as part of the NERC GGREW (Greenhouse Gas Removal by Enhanced Weathering) consortium. The wider aim of this broad project is to establish whether mine waste could be treated with microbes or spread over agricultural land to artificially accelerate the natural weathering process. This would draw down atmospheric carbon dioxide and store carbon as bicarbonate ions in the ocean, in order to achieve negative emissions. My DPhil research investigates the biological response of the ocean in the event that this geoengineering scheme were implemented, including the effect of raised alkalinity on coccolithophores and other calcifying surface ocean organisms through laboratory culturing experiments both in Oxford and Eilat (Israel), field experiments, and ocean modelling.
I graduated from the University of Cambridge in 2017 with MSci in Natural Sciences (Earth Sciences) and BA in Geography & Earth Sciences.
I am also keen on science communication and outreach.
View Selected Publications
Bach, L. T., Gill, S. J., Rickaby, R. E. M., Gore, S., Renforth. P. (in review) ‘CO2 removal with enhanced weathering and ocean alkalinity enhancement: Potential risks and co-benefits for marine pelagic ecosystems’, Frontiers in Climate
‘Chapter 5.13: Enhancing ocean alkalinity’ in GESAMP (2019). “High level review of a wide range of proposed marine geoengineering techniques”. (Boyd, P.W. and Vivian, C.M.G., eds.). (IMO/FAO/UNESCO-IOC/UNIDO/WMO/IAEA/UN/UN Environment/ UNDP/ISA Joint Group of Experts on the Scientific Aspects of Marine Environmental Protection). Rep. Stud. GESAMP No. 98, 144 p.
View Extended Publications
Gill, S. J., Rickaby, R. E. M., Henderson, G. M., 2019. The calcification response of multiple species of coccolithophore to elevated ocean alkalinity. Shackleton Meeting, London.
Gill, S. J., Rickaby, R. E. M., Henderson, G. M., 2019. The calcification response of coccolithophores to elevated ocean alkalinity. Goldschmidt Conference, Barcelona.
Gill, S. J., Rickaby, R. E. M., Henderson, G. M., 2019. The calcification response of coccolithophores to elevated ocean alkalinity. US OCB Summer Workshop, Woods Hole.
“Are Negative Emissions Positive? Geoengineering, climate change, and public perception.” Anthroposphere, the Oxford Climate Society journal, Hilary Term 2018.
Mohadjer, S., Mutz, S., Amey, R., Drews, R., Kemp, M., Kloos, P., Mitchell, L., Nettesheim, M., Gill, S. J., Starke, J. & Ehlers, T. A., 2018. Using Paired Teaching for Earthquake Education in Schools. EGU General Assembly, Vienna.
Gill, S. J., Edmonds, M. & Turchyn, A. V., 2017. Global trends in volcanic arc sulfur outgassing. Joint Assembly TSG-VMSG-BGA, Liverpool.