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Biogeochemical cycling of trace metals in a changing Arctic Ocean


Project Description

Project Rationale:
The Arctic Ocean is the most rapidly warming ocean on our planet, but the consequences of ice melt on primary productivity, which underpins the entire Arctic ecosystem, are not clear. Although primary productivity has already increased [1], future trends have proven hard to predict because of ongoing debate on the supply of trace metals that are essential for phytoplankton growth. For example, retreat of sea ice may reduce supplies of iron to growth-limiting levels in the central Arctic Ocean [2], whereas increased mixing between onshore and offshore waters may enhance metal input from shelf seas.
The aim of this study is to determine the processes that control the availability of trace metals in the Arctic Ocean. This will be done via collection of seawater samples and observational data across environmental gradients (temperature, nutrients, metals) in the eastern Arctic Ocean, employing state-of-the-art metal isotope analyses. This work will provide a robust framework for understanding the importance of trace metal supply on primary productivity and the carbon cycle in the Arctic Ocean under future ice-free conditions.

Funding Notes

You can apply for fully-funded studentships (stipend and fees) from INSPIRE if you:
Are a UK or EU national.
Have no restrictions on how long you can stay in the UK.
Have been 'ordinarily resident' in the UK for 3 years prior to the start of the project.

Please click View Website for more information on eligibility and how to apply

References

[1] Arrigo, K.R., van Dijken, G.L. (2015) Continued increases in Arctic Ocean primary production. Progress in Oceanography, 136, 60-70.
[2] Wang, S., Bailey, D., Lindsay, K., Moore, J.K., Holland M. (2014) Impact of sea ice on the marine iron cycle and phytoplankton productivity. Biogeosciences, 11, 4713-4731.
[3] Goring-Harford, H.J., Klar, J.K., Pearce, C.R., Connelly, D.P., Achterberg, E.P., James, R.H. (2018) Behaviour of chromium isotopes in the eastern sub-tropical Atlantic Oxygen
Minimum Zone. Geohimica et Cosmochimica Acta, 236, 41-59.

How good is research at University of Southampton in Earth Systems and Environmental Sciences?

FTE Category A staff submitted: 68.62

Research output data provided by the Research Excellence Framework (REF)

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