NERC ONE Planet DTP
The project aims to understand the impact of subglacial geochemical processes on global chemical cycling and how these impacts will change in an increasingly deglaciating world. Past research has identified large chemical fluxes emerging at glacial termini and in the subglacial environments of large ice bodies. However, questions remain regarding the degree to which the chemical activity beneath glaciers is driven by atmospheric CO2 drawdown or by oxidation of sulfur and organic matter, which have opposing effects for global geochemical cycling. Deglaciated proglacial forelands can also be areas of active chemical weathering and may substantailly contrast with the subglacial environment.
Research will focus on the world’s largest ice bodies in Greenland and Antarctica, alongside glaciated volcanic islands, newly emerging lands which are hotspots of chemical weathering. Fieldwork in Greenland, Iceland, and/or Jan Mayen may be planned as part of the project. Water, sediment, and sediment-bearing ice will be collected from glaciers and ice caps at these sites. Existing samples from Greenland, Antarctica, and Jan Mayen will also be available. Analyses will focus on the chemistry, sedimentology and mineralogy of these samples, as relevant to determining the underlying chemical pathways active in the subglacial or proglacial system. The doctoral student will have broad freedom to develop a plan for analysis, including employing a range of stable or radioisotopes. Of particular interest are the isotopic constituents of dissolved inorganic carbon, glacial ice, and newly formed minerals such carbonates and clays.
The project will train the doctoral student in a wide range of field and analytical skills relating the geochemical analysis of rock, sediment, and water. It will be connected with ongoing research in Greenland and Antarctica led by supervisor Graly and will include collaborations with international colleagues. The student may have the opportunity to participate in a monitoring study in West Greenland, together with an international (USA – UK) team. Upon completion, the student will be qualified to pursue an academic career employing chemical and isotopic methods to analyse earth system feedbacks or to pursue a range of industry or government positions (e.g. energy, environmental) that depend on the analysis of geochemical or mineralogical data.
Key Research Gaps and Questions:
Does glaciation enhance the cycling of atmospheric carbon to the lithosphere? Which glacial settings have the greatest impact on the global geochemical system? How do glacial and deglaciated landscapes differ in rates of chemical cycling?
Prerequisites:
Degree in geology, physical geography, or other relevant fields. Coursework or research experience in geochemistry, mineralogy, and/or isotopes is strongly recommended. Field experience in an academic or industry setting is desirable. For more information, please contact Joseph Graly ([Email Address Removed]).