About the Project
Sand strips are an ephemeral aeolian bedform that typically form in beach and desert environments when surfaces are temporarily moistened due to rain or tidal inputs (Kocurek et al. 1992, Nield et al., 2011). Dry sand accumulates and migrates in these low amplitude features that merge, interact and eventually either extenuate or form protodunes depending on flow-form feedbacks. We know very little about the dynamic nature of these strips, and the feedbacks and controls on their development (Nield, 2011). Yet, they are typically the precursor to dunes and better understanding of their dynamics will help to improve modelling and management of aeolian systems. Environmental Sensing at Southampton (https://esas.soton.ac.uk/), within the Geography and Environment Academic Unit operates three terrestrial lasers scanners (TLS). Use of this TLS technology through dedicated field campaigns on beaches where sand strips commonly form (e.g. Ynyslas, Brancaster) will enable examination of feedback processes at high spatial and temporal resolution.
This studentship will explore the complex relationships between surface properties and sedimentation through (1) field experiments, including the collection of collocated high resolution datasets using TLS, saltation sensors and anemometry, and (2) computer simulation models that incorporate key processes and feedback. This study aims to highlight the importance of considering geomorphic feedback when assessing the influence of surface moisture in aeolian process dominated systems.
Candidates must have or expect to gain a first or strong upper second class degree, in an appropriate discipline, not necessarily Geography. Details on how to apply are available from Julie Drewitt, email [Email Address Removed]. Informal enquiries may be made to Dr Jo Nield (email [Email Address Removed]). For the latest information on postgraduate opportunities within Geography and Environment, please visit our website at http://www.southampton.ac.uk/geography/postgraduate/research_degrees/studentships.page?
Funding Notes
This is one of a range of topics currently being advertised. Funding will go to the project(s) with the best applicant(s). The studentship is funded at RCUK level, currently £14,296 per annum, with an RTSG of £750, together with home rate tuition fees. The studentship is for three years. The studentship will fully support British and EU nationals only. International students can apply but they must be able to meet the difference between home/EU and International tuition fees themselves.
References
Kocurek, G., Townsley, M., Yeh, E., Havholm, K.G., and Sweet, M.L., 1992, Dune and dune-field development on Padre Island, Texas, with implications for interdune deposition and water-table-controlled accumulation: Journal of Sedimentary Research, v. 62, p. 622-635.
Nield, J.M., Wiggs, G.F.S., and Squirrell, R.S., 2011, Aeolian sand strip mobility and protodune development on a drying beach: examining surface moisture and surface roughness patterns measured by terrestrial laser scanning: Earth Surface Processes and Landforms, v. 36, p. 513-522.
Nield, J.M., 2011, Surface moisture induced feedback in aeolian environments: Geology, v. 39, p. 915-918.
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