The course covers the aspects of biogeochemistry where the oceans are a major reservoir through which elements and compounds derived by weathering of the continental crust, hydrothermal inputs driven by seafloor magmatism and accretionary prisms, interchanges with the atmosphere, and modulation by life all combine. In addition to atmospheric exchange, there are outputs related to sedimentation and diagenetic processes,  evaporative processes in shallow seas,  plus long-term recycling through subduction zones.

A combination of physical, chemical and biological processes within the oceans are crucial in terms of primary production and trace metal limitations, and consequent influences on  global climate. Modern marine geochemistry aims to link direct analytical studies of the oceans and sediments, and interactions with life via proxies to define how the composition of the oceans has changed with time at a variety of timescales, and hence to understand the evolution of the oceans, global climate, and life.

Note: Graduate students attend joint classes with undergraduates but will be assessed separately.

On completion of this course students will achieve:

1. Understanding of how the ocean-atmosphere-biosphere-lithosphere systems interact with particular emphasis on the biogeochemistry of the oceans.   
2. Appreciation of the basic principles of global ocean chemistry, interactions between inorganic and organic components, computer modelling of mass and energy exchanges, calculations of chemical equilibrium and kinetic effects in the seas, and the perturbations to the Earth's climate systems.

Theory Exam (50%)

Practicals (30%)

Research Report (20%)

Bachelor degree; with first year Geology or first year Chemistry.

Geology or Chemistry to a first year level.