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Dr Joseph Stewart

Dr Joseph Stewart

Dr Joseph Stewart
PhD (Soton.), MESc (Oxon.)

Senior Research Associate

Area of research

Boron isotopes in deep sea corals

Office G43
Wills Memorial Building,
Queens Road, Clifton BS8 1RJ
(See a map)

Tel. +44 (0) 117 954 5247

Research summary

I am an isotope geochemist studying the chemistry of marine biogenic carbonates to better understand the chemistry of the seawater in which these organisms lived.

My previous research has involved the taxonomic classification and geochemical measurement of ancient calcified plankton (foraminifera) recovered from deep ocean sediment cores to reconstruct ancient seawater temperatures (e.g. Mg/Ca) and changing patterns of continental weathering (e.g. Nd isotopes)

More recently research efforts have been focused on the refinement and application of boron isotope proxy for seawater pH measured in corals and calcified algae. The aims of this research are (i) to identify ...

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2015 – 2017    Postdoctoral Researcher – National Institute of Standards & Technology, USA

  • Development of boron isotope pH-proxy in marine carbonates and application to NIST Environmental Specimen Bank samples
  • Production, bottling, and value certification of two new dissolved carbonate boron-isotope/trace-metal reference materials: NIST RM 8301c and NIST RM 8301f

2012 – 2015   Postdoctoral Research Fellow – Univ. of Southampton (NOCS), UK

  • The influence of seawater pH on the boron isotopic composition of deep sea corals
  • Advisor Prof Gavin Foster

2008 – 2012   PhD Geochemistry/Palaeoceanography – Univ. of Southampton (NOCS), UK  

  • Investigation into the effect of ...

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Recent publications

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View complete publications list in the University of Bristol publications system

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