Dr Peter Wynn

Senior Lecturer

Research Interests

Natural environmental isotopes are used as an advanced method for tracing the dynamics of solutes and nutrients within earth systems. Within glaciated environments, natural isotopes of 15N/14N, 18O/16O, 34S/32S and 13C/12C have been used to fingerprint sources and sinks of nutrients within High Arctic and Icelandic glaciers. Fluorescence of compounds within snow and ice is currently being used as a method for establishing the organic component of the glacial ecosystem. Within karst environments, sulphur isotopes are currently being used to identify causes of variations in the sulphur content of stalagmites over time. Identification of how sulphur is cycled through the overlying ecosystem and karst environment allows transfer functions between climate and speleothems to be quantified. Compound specific analysis of organic matter contained within speleothem calcite is currently being investigated as a biomarker of past anthropogenic activity.

Current research includes funding from NERC to address archives of sulphur contained within trees (‘Interrogating trees as archives of environmental Sulphur variability’). In collaboration with the University of Swansea and the University of Birmingham, we aim to produce a high resolution record of changes in sulphur concentration and isotopic composition and link these to speleothem records from the same region. P. Wynn is also co-investigator on NERC grant ‘The Svalbard Exemplar for Neoproterozoic glaciation’, led by the University of Birmingham. This project uses the geochemical composition of glacial lake carbonates from NE Svalbard to infer palaeo atmospheric conditions during the Cryogenian glaciations of the Neoproterozoic.


Sulphate partitioning into calcite: Experimental verification of pH control and application to seasonality in speleothems
Wynn, P.M., Fairchild, I., Borsato, A., Spötl, C., Hartland, A., Baker, A., Frisia, S., Baldini, J.U.L. 1/04/2018 In: Geochimica et Cosmochimica Acta. 226, p. 69-83. 15 p.
Journal article

Lateral variations in vegetation in the Himalaya since the Miocene and implications for climate evolution
Vogeli, N., Najman, Y.M.R., van der Beek, P., Huyghe, P., Wynn, P.M., Govin, G., van der Veen, I., Sachse, D. 1/08/2017 In: Earth and Planetary Science Letters. 471, p. 1-9. 9 p.
Journal article

Roles of forest bioproductivity, transpiration and fire in a nine-year record of cave dripwater chemistry from southwest Australia
Treble, P.C., Fairchild, I.J., Baker, A., Meredith, K.T., Andersen, M.S., Salmon, S.U., Bradley, C., Wynn, P.M., Hankin, S., Wood, A., McGuire, E. 1/07/2016 In: Geochimica et Cosmochimica Acta. 184, p. 132-150. 19 p.
Journal article

Interpretation and application of carbon isotope ratios in freshwater diatom silica
Webb, M., Barker, P.A., Wynn, P.M., Heiri, O., van Hardenbroek, M., Frances, P., Russell, J., Stott, A.W., Leng, M. 05/2016 In: Journal of Quaternary Science. 31, 4, p. 300-309. 10 p.
Journal article

North Atlantic forcing of moisture delivery to Europe throughout the Holocene
Smith, A., Wynn, P.M., Barker, P.A., Leng, M., Noble, S., Tych, W. 25/04/2016 In: Scientific Reports. 6, 7 p.
Journal article

Continental carbonate facies of a Neoproterozoic panglaciation, north-east Svalbard
Fairchild, I.J., Fleming, E.J., Benn, D.I., Boomer, I., Dublyansky, Y.V., Halverson, G.P., Hambrey, M.J., Hendy, C., McMillan, E.A., Spötl, C., Stevenson, C.T.E., Wynn, P.M. 4/02/2016 In: Sedimentology. 63, 2, p. 443-497. 55 p.
Journal article

Pointcatcher software: analysis of glacial time-lapse photography and integration with multi-temporal digital elevation models
James, M., How, P., Wynn, P.M. 02/2016 In: Journal of Glaciology. 62, 231, p. 159-169. 11 p.
Journal article

Cave monitoring and the potential for palaeoclimate reconstruction from Cueva de Asiul, Cantabria (N. Spain)
Smith, A., Wynn, P., Barker, P., Leng, M., Noble, S., Stott, A. 01/2016 In: International Journal of Speleology. 45, 1, p. 1-9. 9 p.
Journal article

Drip water electrical conductivity as an indicator of cave ventilation at the event scale
Smith, A., Wynn, P., Barker, P., Leng, M. 1/11/2015 In: Science of the Total Environment. 532, p. 517-527. 11 p.
Journal article

Sulphate concentration in cave dripwater and speleothems: long-term trends and overview of its significance as proxy for environmental processes and climate changes
Borsato, A., Frisia, S., Wynn, P.M., Fairchild, I.J., Miorandi, R. 1/11/2015 In: Quaternary Science Reviews. 127, p. 48-60. 13 p.
Journal article

Orbitally forced ice sheet fluctuations during the Marinoan Snowball Earth glaciation
Benn, D.I., Le Hir, G., Bao, H., Donnadieu, Y., Dumas, C., Fleming, E.J., Hambrey, M.J., McMillan, E.A., Petronis, M.S., Ramstein, G., Stevenson, C.T.E., Wynn, P.M., Fairchild, I.J. 09/2015 In: Nature Geoscience. 8, 4 p.

Brittle-ductile magma deformation and explosive-effusive behaviour: insight from Icelandic rhyolitic dykes
McGowan, E., Tuffen, H., James, M., Wynn, P. 22/07/2015

Seasonal release of anoxic geothermal meltwater from the Katla volcanic system at Sólheimajökull, Iceland
Wynn, P., Morrell, D., Tuffen, H., Barker, P., Tweed, F., Burns, R. 9/03/2015 In: Chemical Geology. 396, p. 228-238. 11 p.
Journal article

Spatial variability and temporal trends in water‐use efficiency of European forests
Saurer, M., Spahni, R., Frank, D.C., Joos, F., Leuenberger, M., Loader, N.J., McCarroll, D., Gagen, M., Poulter, B., Seigwolf, R.T.W., Andreu-Hayles, L., Boettger, T., Dorado Liñán, I., Fairchild, I.J., Friedrich, M., Gutierrez, E., Haupt, M., Hilasvuori, E., Heinrich, I., Helle, G., Grudd, H., Jalkaen, R., Levanič, T., Linderholm, H.W., Robertson, I., Sonninen, E., Treydte, K., Waterhouse, J.S., Woodley, E.J., Wynn, P.M., Young, G.H.F. 1/12/2014 In: Global Change Biology. 20, 12, p. 3700-3712. 13 p.
Journal article

Quaternary climatic instability in south-east Australia from a multi-proxy speleothem record
Webb, M., Dredge, J., Barker, P., Mueller, W., Jex, C., Desmarchelier, J., Hellstrom, J., Wynn, P. 8/08/2014 In: Journal of Quaternary Science. 29, 6, p. 589-596. 8 p.
Journal article

A framework for the extraction and interpretation of organic molecules in speleothem carbonate
Wynn, P.M., Brocks, J. 30/04/2014 In: Rapid Communications in Mass Spectrometry. 28, 8, p. 845-854. 10 p.
Journal article

Interrogating trees for isotopic archives of atmospheric sulphur deposition and comparison to speleothem records
Wynn, P.M., Loader, N.J., Fairchild, I. 30/04/2014 In: Environmental Pollution. 187, p. 98-105. 8 p.
Journal article

Synchrotron X-ray distinction of seasonal hydrological and temperature patterns in speleothem carbonate
Wynn, P., Fairchild, I.J., Spötl, C., Hartland, A., Mattey, D., Fayard, B., Cotte, M. 30/01/2014 In: Environmental Chemistry. 11, 1, p. 28-36. 9 p.
Journal article

Biogeochemical cycling of sulphur in karst and transfer into speleothem archives at Grotta di Ernesto, Italy
Wynn, P., Borsato, A., Baker, A., Frisia, S., Miorandi, R., Fairchild, I.J. 07/2013 In: Biogeochemistry. 114, 1-3, p. 255-267. 13 p.
Journal article

Carbon cycling within an East African lake revealed by the carbon isotope composition of diatom silica: a 25-ka record from Lake Challa, Mt. Kilimanjaro
Barker, P., Hurrell, E., Leng, M., Plessen, B., Wolff, C., Conley, D., Keppens, E., Milne, I., Cumming, B., Laird, K., Kendrick, C., Wynn, P., Verschuren, D. 15/04/2013 In: Quaternary Science Reviews. 66, p. 55-63. 9 p.
Journal article

Cave aerosols: distribution and contribution to speleothem geochemistry
Wynn, P.M. 1/03/2013 In: Quaternary Science Reviews. 63, p. 23-41. 19 p.
Journal article

Natural and anthropogenic factors which influence aerosol distribution in Ingleborough Show Cave, UK
Smith, A.C., Wynn, P.M., Barker, P.A. 2013 In: International Journal of Speleology. 42, 1, p. 49-56. 8 p.
Journal article

Developing a methodology for carbon isotope analysis of lacustrine diatoms
Hurrell, E.R., Barker, P.A., Leng, M.J., Vane, C.H., Wynn, P., Kendrick, C.P., Verschuren, D., Street-Perrott, F.A. 15/06/2011 In: Rapid Communications in Mass Spectrometry. 25, 11, p. 1567-1574. 8 p.
Journal article

Biogeochemical weathering under ice: Size matters
Wadham, J.L., Tranter, M., Skidmore, M., Hodson, A.J., Priscu, J., Lyons, W.B., Sharp, M., Jackson, M., Wynn, P. 23/09/2010 In: Global Biogeochemical Cycles. 24, p. -. 11 p.
Journal article

High-resolution sulphur isotope analysis of speleothem carbonate by secondary ionisation mass spectrometry
Wynn, P.M., Fairchild, I.J., Frisia, S., Spoetl, C., Baker, A., Borsato, A., EIMF 30/03/2010 In: Chemical Geology. 271, 3-4, p. 101-107. 7 p.
Journal article

High resolution ion microprobe analysis of sulphur isotopes in speleothem carbonate.
Wynn, P.M., Fairchild, I.J., Baker, A., Frisia, S.R., Borsato, A., Miorandi, R., Spotl, C. 2010
Meeting abstract

Petrology and geochemistry of annually laminated stalagmites from an Alpine cave (Obir, Austria) : seasonal cave physiology.
Fairchild, I.J., Spotl, C., Frisia, S., Borsato, A., Susini, J., Wynn, P.M., Cauzid, J. 2010 In: Geological Society Special Publications. 336, p. 295-321. 27 p.
Journal article

Sulfur fixation in wood mapped by synchrotron X-ray studies: implications for environmental archives
Fairchild, I.I., Loader, N.J., Wynn, P.M., Frisia, S., Thomas, P.A., Lageard, J.G.A., De Momi, A., Hartland, A., Borsato, A., La Porta, N., Susini, J. 1/03/2009 In: Environmental Science and Technology. 43, 5, p. 1310-1315. 6 p.
Journal article

Chronology-building using objective identification of annual signals in trace element profiles of stalagmites.
Smith, C., Fairchild, I.J., Spötl, C., Frisia, S., Borsato, A., Moreton, S.G., Wynn, P.M. 02/2009 In: Quaternary Geochronology. 4, 1, p. 11-21. 11 p.
Journal article

Stretching the envelope of past surface environments : Neoproterozoic glacial lakes from Svalbard.
Bao, H., Fairchild, I.J., Wynn, P.M., Spotl, C. 2/01/2009 In: Science. 323, 5910, p. 119-122. 4 p.
Journal article

Isotopic archives of sulphate in speleothems.
Wynn, P.M., Fairchild, I.J., Baker, A., Baldini, J.U.L., McDermott, F. 15/05/2008 In: Geochimica et Cosmochimica Acta. 72, 10, p. 2465-2477. 13 p.
Journal article

Nitrate production beneath a High Arctic glacier, Svalbard.
Wynn, P.M., Hodson, A.J., Heaton, T.H.E., Chenery, S.R. 30/09/2007 In: Chemical Geology. 244, 1-2, p. 88-102. 15 p.
Journal article

Analysis of the climate signal contained within d18O and growth rate parameters in two Ethiopian stalagmites.
Baker, A., Asrat, A., Fairchild, I.J., Leng, M.J., Wynn, P.M., Bryant, C., Genty, D., Umer, M. 15/06/2007 In: Geochimica et Cosmochimica Acta. 71, 12, p. 2975-2988. 14 p.
Journal article

Atmospheric forcing of sulphate in speleothem carbonate.
Wynn, P.M., Fairchild, I.J., Baker, A., Frisia, S.R., Borsato, A., Miorandi, R. 08/2006
Meeting abstract

Chemical and isotopic switching within the subglacial environment of a high Arctic glacier.
Wynn, P.M., Hodson, A., Heaton, T.H.E. 2006 In: Biogeochemistry. 78, 2, p. 173-193. 21 p.
Journal article

Multi-year water and surface energy budget of a high-latitude polythermal glacier : evidence for overwinter water storage in a dynamic subglacial reservoir.
Hodson, A.J., Kohler, J., Brinkhaus, M., Wynn, P.M. 08/2005 In: Annals of Glaciology. 42, 1, p. 42-46. 5 p.
Journal article

The High Arctic glacial ecosystem : new insights from nutrient budgets
Hodson, A.J., Mumford, P., Kohler, J., Wynn, P.M. 02/2005 In: Biogeochemistry. 72, 2, p. 233-256. 24 p.
Journal article

Low 15N/14N ratios for nitrate in snow in the High Arctic (791N).
Heaton, T.H.E., Wynn, P.M., Tye, A.M. 10/2004 In: Atmospheric Environment. 38, 33, p. 5611-5621. 11 p.
Journal article