met-jobs@lists.reading.ac.uk
January 2013
Message 73

[Periods|Index by:DateThreadSubjectAuthor|Date:PreviousNext|Thread:(Previous)(Next)|List Information]

[Met-jobs] PhD Opportunity at BAS & SAMS (Cambridge/Oban, UK) - Arctic Fjords: simplified modelling and the role of freshwater

From "Abrahamsen, Povl" <epab@bas.ac.uk>
To "met-jobs@lists.reading.ac.uk" <met-jobs@lists.reading.ac.uk>
Date Tue, 22 Jan 2013 16:49:23 +0000

Dear colleagues,

I apologize in advance for any cross-posting...

The British Antarctic Survey is currently advertising for two Arctic PhD 
studentships (to be selected among five projects, with the two best applicants 
selected). This exciting project is between the Polar Oceans programme at BAS, 
and the Scottish Association for Marine Science (SAMS).

Note: there are also Arctic PhD projects available in the subjects of geology, 
biology, atmospheric physics, and climate - see the BAS website for more 
details. The deadline for all of the Arctic PhD projects is Feb. 28th.

The project description is also available at 
http://www.antarctica.ac.uk/employment/vacancies/job.php?JobID=795

-------------------------------------------

Arctic Fjords: simplified modelling and the role of freshwater
(Arctic Project 5)

Supervisors:

Mike Meredith (Primary supervisor at BAS)
Finlo Cottier (Main supervisor at SAMS)
Mark Inall (SAMS)
Povl Abrahamsen (BAS)

Observations show that the Arctic is undergoing unprecedented change, and model 
forecasts indicate that the pace of change will continue unabated. One of the 
major elements of the Arctic marine system that is reacting to change is the 
contribution of freshwater. Glaciers, rivers, sea ice and precipitation are all 
sources of freshwater into the Arctic, and each is susceptible to variations in 
climate. There remain significant uncertainties about the relative 
contributions of freshwater sources within coastal and shelf waters. It is 
important to better determine these, especially in order to understand the 
interaction between warm ocean waters and tidewater glaciers, which is one of 
the most active and exciting areas of oceanography in the Arctic. The delivery 
of heat from the ocean, through the fjord to the glacier is a key process in 
understanding the action of the ocean on glacial melting.

This project will focus on the fjords and coastal waters around the Svalbard 
archipelago, one of the most readily-accessible areas of the high Arctic. Here, 
a systematic characterisation of the freshwater signatures and distribution 
will be undertaken to establish the relative contributions of freshwater 
sources. Simplified box models will be used to represent and constrain the 
freshwater elements of fjord systems, since they can quantify the relative 
importance of the physical processes occurring within the fjord that control or 
modify the delivery of warm water to the glacier. An important constraint in 
such box models is the need to incorporate freshwater processes adequately. 
Salinity measurements can be used to understand the time-varying quantity of 
freshwater in the ocean, but they do not directly reveal the relative 
importance of its sources. The ratios of stable isotopes of oxygen in seawater, 
when measured in addition to salinity, provide a strong constraint on the 
importance of sea ice melt versus glacial melt and other freshwater inputs.

The student will:
1. Construct simplified box models for Svalbard fjordic systems, including a 
coupled sea ice module. Challenge these models with existing datasets from 
Billefjorden.
2. Compile existing oxygen isotope data from Atlantic- and Arctic-dominated 
coastal sites (Kongsfjorden and Rijpfjorden) to establish salinity/δ18O 
relationships and freshwater budgets for these contrasting systems.
3. Obtain new isotope samples from the west and north Svalbard shelves, to 
determine the water mass composition, and the origins and spatial modification 
of the coastal currents in this region.
4. Use the information on the spatial and temporal changes in freshwater inputs 
from different sources to improve their representations in the box models, and 
conduct trial runs for different fjordic systems.
5. Apply knowledge on freshwater components of coastal currents into analysis 
of numerical model output from Norwegian research groups.

Applicants should hold or expect to gain a first or upper-second class 
undergraduate degree or a master's degree in Physics, Mathematics, 
Oceanography, Meteorology, or any other numerate subject. The project will 
involve developing, running, and analysing output from simplified numerical 
models, and comparing these results with existing data. While no fieldwork is 
required, there will be an opportunity to obtain further samples on a research 
cruise around Svalbard during the project.

The successful student will be registered with the Scottish Association for 
Marine Science (SAMS), University of the Highlands and Islands (UHI), with the 
degree accredited by and awarded through the University of Aberdeen.

The NERC PhD Studentship is linked to the British Antarctic Survey Polar Oceans 
programme, which investigates the role of processes and changes both in the 
shelf sea and in open-ocean environments in both Polar Regions, to further our 
understanding of polar control of the Earth System 
(http://www.bas.ac.uk/bas_research/our_research/current/programmes/oceans/index.php).
 We envisage that the student will spend some of the studentship at SAMS in 
Oban, and some at BAS in Cambridge.

Salary: The studentship is expected to last 3.5 years from October 2013. 
Stipend for 2012/2013 was £13,590 p.a. For eligibility go to 
http://www.nerc.ac.uk/funding/available/postgrad/eligibility.asp

Applications should be addressed to Mike Meredith, including a covering letter, 
full CV and the e-mail addresses of two referees and sent to 
basstudentoffice@bas.ac.uk Please quote reference number AP5.

Closing date for applications is 28th February 2013. It is intended that 
initial interviews will be held at BAS week commencing 18th March 2013.

For further details about the British Antarctic Survey please see: 
http://www.antarctica.ac.uk
For further details about the Scottish Association for Marine Science please 
see: http://www.sams.ac.uk



This message (and any attachments) is for the recipient only. NERC is subject 
to the Freedom of Information Act 2000 and the contents of this email and any 
reply you make may be disclosed by NERC unless it is exempt from release under 
the Act. Any material supplied to NERC may be stored in an electronic records 
management system.



Go to: Periods · List Information · Index by: Date (or Reverse Date), Thread, Subject or Author.