Knowledge of past deep-ocean current speeds has the potential to inform our understanding of changes in the climate system on glacial-interglacial timescales as these may be used to help constrain changes in deep-ocean circulation rates and pathway. The Rockall Trough, a deep water basin offshore Ireland and UK, is known to be the pathway for the exchange of water masses in the North Atlantic (New & Smythe-Wright, 2001), but limited data exists to date on the changes in ocean circulation over time in this part of the Atlantic Ocean.
Previous works on deep-water sedimentation in the region have recognised the presence of thick sediment bodies related to the flow of deep-ocean currents, including the Feni Drift and contouritic deposits on the eastern side of the Rockall Trough (Stoker, 1998). Proxies obtained from deep-water sediment cores, such as the mean size and percentage of sortable silt, can be used to assess the variations in the speed of bottom currents (Mao et al., 2018; Spooner et al., 2018).
This project will utilise a series of sediment cores from the continental slope and deep Rockall Trough, for which a chronostratigraphy is already established, to investigate fluctuations in current vigour using grain size measurements with a focus on the sortable silt fraction.
The project is suitable for a self-motivated applicant with Earth Science, Geology, Geography, Environmental Science or Marine Science background, with capacity to learn new analytical techniques and basic statistical analysis.
References:
Mao L., Piper D.J.W., Saint-Ange F., & Andrews J.T. (2018). Labrador Current fluctuation during the last glacial cycle. Marine Geology, 395: 234-246.
New A.L. & Smythe-Wright D. (2001). Aspects of the circulation in the Rockall Trough. Continental Shelf Research 21: 777–810
Spooner P. T., Thornalle, D. J. R., & Ellis, P. (2018). Grain size constraints on glacial circulation in the Southwest Atlantic. Paleoceanography and Paleoclimatology, 33,21–30. https:doi. org10.10022017PA003232
Stoker M.S. (1998). Sediment-drift development on the continental margin off NW Britain. Geological Society, London, Special Publications 1998; v. 129; p. 229-254 doi:10.1144GSL.SP.1998.129.01.15
Applicants should hold, or expect to obtain, a First or Upper Second Class Honours Degree in a subject relevant to the proposed area of study.
We may also consider applications from those who hold equivalent qualifications, for example, a Lower Second Class Honours Degree plus a Master’s Degree with Distinction.
In exceptional circumstances, the University may consider a portfolio of evidence from applicants who have appropriate professional experience which is equivalent to the learning outcomes of an Honours degree in lieu of academic qualifications.
If the University receives a large number of applicants for the project, the following desirable criteria may be applied to shortlist applicants for interview.
The University offers the following levels of support:
The following scholarship options are available to applicants worldwide:
These scholarships will cover full-time PhD tuition fees for three years (subject to satisfactory academic performance) and will provide a £900 per annum research training support grant (RTSG) to help support the PhD researcher.
Applicants who already hold a doctoral degree or who have been registered on a programme of research leading to the award of a doctoral degree on a full-time basis for more than one year (or part-time equivalent) are NOT eligible to apply for an award.
Please note: you will automatically be entered into the competition for the Full Award, unless you state otherwise in your application.
The scholarship will cover tuition fees at the Home rate and a maintenance allowance of £19,000 (tbc) per annum for three years (subject to satisfactory academic performance).
This scholarship also comes with £900 per annum for three years as a research training support grant (RTSG) allocation to help support the PhD researcher.
Due consideration should be given to financing your studies. Further information on cost of living
Submission deadline
Friday 7 February 2020
12:00AM
Interview Date
March 2020
Preferred student start date
September 2020
Telephone
Contact by phone
Email
Contact by email