Dr Jonathan Richard Dean

Dr Jonathan Richard Dean

Post Doctoral Research Assistant

Location: Keyworth

Tel: 0115 936 3037

E-mail Dr Jonathan Richard Dean

ORCID: 000000018071000X

Summary

I am a palaeoclimatologist using stable isotope analysis of lake sediments to reconstruct past changes in hydroclimate. I am currently working on two projects, one using sediments from Chew Bahir in Ethiopia over multiple glacial-interglacial cycles and the other using sediments from Nar Gölü in Turkey over the late glacial and Holocene.

Biography

  •  2015 – ongoing : NERC Postdoctoral Research Assistant, NERC Isotope Geosciences Facilities, British Geological Survey
  •  2015 – ongoing : Honorary Fellow, School of Geography, University of Nottingham
  •  2014 –2015 : Stable Isotope Apprentice, NERC Isotope Geosciences Facilities, British Geological Survey
  •  2010 –2014 : PhD, School of Geography, University of Nottingham
  •  2007 –2010 : BSc Geography, University of Nottingham
  •  2000 –2007 : Longsands Academy

Current projects and collaboration

  •  2015 – ongoing : Stable isotope analysis of carbonates and organics from a ~280 metre core sequence drilled from Chew Bahir, a palaeo-lake in southern Ethiopia, as part of NERC Standard Grant "A 500,000-year environmental record from Chew Bahir, south Ethiopia: testing hypotheses of climate-driven human evolution, innovation, and dispersal". PI: Henry Lamb, Aberystwyth. This project is part of the wider Hominin Sites and Paleolakes Drilling Project, which aims to produce palaeoenvironmental records from five sites in east Africa, each being close to globally significant hominin sites.
  •  2015 – ongoing : Stable isotope analysis of carbonates from a ~40 metre core sequence from Chew Bahir, a palaeo-lake in southern Ethiopia, as part of the Collaborative Research Centre 806 Our Way to Europe project at the University of Cologne. PIs: Prof. Frank Schäbitz and Dr. Bernd Wagner, Cologne
  •  2012 – ongoing : Stable isotope analysis of carbonates as part of the NERC small grant "Climate change and the Plague of Justinian", using sediments from Nar Gölü to examine the changes in climate that took place at the same time as the Plague of Justinian. It has been hypothesised that a shift to wetter climate could have increased the numbers of rodents which carry fleas, which in turn carry the plague bacterium. PI: Neil Roberts, Plymouth
  •  2010 – ongoing : Stable isotope analysis of carbonates, diatoms and organics from a ~22 metre core sequence taken from Nar Gölü, a lake in Cappadocia in central Turkey, that extends from the present day back to ~14,000 years ago. We have been able to analyse the sediments at a very high resolution, enabling us to identify changes on decadal- and centennial-scales. Our limnological monitoring programme, which began in 1997, has enabled us to test how climate changes influence limnology and how these changes are recorded in sediment records. We have developed methods of reconstructing changes in palaeoseasonality by comparing the oxygen isotope records from the carbonates and diatoms. PI: Neil Roberts, Plymouth

Research interests

  • Quaternary palaeoclimatology, especially in the Near East and East Africa
  • Light element stable isotope geochemistry, especially oxygen and carbon isotopes in carbonates and oxygen isotopes in biogenic silica
  • Palaeolimnology
  • Links between human biological and cultural evolution and climate change
  • The Anthropocene

Experience

  • Peer-reviewer for National Science Foundation, Quaternary Science Reviews, Quaternary Research, Journal of Quaternary Science, Journal of Paleolimnology, Fundamental and Applied Limnology, Geological Quarterly
  • Invited guest lectures at Dame Alice Owen’s School and Simon Langton Grammar School for Boys
  • Interview with German science magazine ‘Bild der Wissenshaft’ on the Anthropocene, published in February 2015 edition
  •  2013 –2014 : Teaching/co-leading School of Geography, Earth and Environmental Sciences, University of Birmingham BSc level field course to Turkey, involving lecturing, assessment writing and marking
  •  2010 –2013 : Teaching at BSc and MSc level in the School of Geography, University of Nottingham, including taking tutorials, marking, laboratory supervision and field course assistance

Published outputs

Key papers

Dean, J.R., Leng, M.J., Mackay, A.W. 2016. Isotopic signatures. In: The Encyclopedia of the Anthropocene. Elsevier, Oxford.

Roberts, C.N., Allcock, S.L., Arnaud, F., Dean, J.R., Eastwood, W.J., Jones, M.D., Leng, M.J., Metcalfe, S.E., Malet, E., Woodbridge, J., Yiğitbaşıoğlu, H., 2016. A tale of two lakes: a multi-proxy comparison of Late Glacial and Holocene environmental change in Cappadocia, Turkey. Journal of Quaternary Science 31, 348-362.

Lewis, J.P., Leng, M.J., Dean, J.R., Marciniak, A., Bar-Yosef Mayer, D.E., Wu, X., 2016. Early Holocene palaeoseasonality inferred from the stable isotope composition of Unio shells from Çatalhöyük, Turkey. Environmental Archaeology, 1-17.

Dean, J.R., Jones, M.D., Leng, M.J., Noble, S.R., Metcalfe, S.E., Sloane, H.J., Sahy, D., Eastwood, W.J., Roberts, C.N. 2015. Eastern Mediterranean hydroclimate over the late glacial and Holocene, reconstructed from the sediments of Nar lake, central Turkey, using stable isotopes and carbonate mineralogy. Quaternary Science Reviews 124, 162-174.

Yiğitbaşıoğlu, H., Dean, J.R., Eastwood, W.J., Roberts, C.N., Jones, M.D., Leng, M.J. 2015. A 600 year-long drought index for central Anatolia. Journal of the Black Sea/Mediterranean Environment 2, 84-88.

Dean, J.R., Eastwood, W.J., Roberts, C.N., Jones, M.D., Yiğitbaşıoğlu, H., Allcock, S.L., Woodbridge, J., Metcalfe, S.E., Leng, M.J. 2015. Tracking the hydro-climatic signal from lake to sediment: a field study from central Turkey. Journal of Hydrology 529, 608-621.

Dean, J.R., Leng, M.J., Mackay, A.W. 2014. Is there an isotopic signature of the Anthropocene? The Anthropocene Review 1, 276-287.

Dean, J.R. 2014. Stable isotope analysis and U-Th dating of late glacial and Holocene lacustrine sediments from central Turkey. PhD thesis, University of Nottingham

Dean, J.R., Jones, M.D., Leng, M.J., Sloane, H.J., Roberts, C.N., Woodbridge, J., Swann, G.E.A., Metcalfe, S.E., Eastwood, W.J., Yiğitbaşıoğlu, H. 2013. Palaeo-seasonality of the last two millennia reconstructed from the oxygen isotope composition of carbonates and diatom silica from Nar Gölü, central Turkey. Quaternary Science Reviews 66, 35-44.