Dr Jackie PatesSenior Lecturer
I specialise in the use of radionuclide tracers (234Th, 210Po, 210Pb, 137Cs, 7Be, 222Rn) to study marine and freshwater processes. My PhD was on the development of a method for determining 234Th in marine matrices. I subsequently worked in the Mediterranean on a series of projects which variously highlighted the roles of atmospheric deposition, advective transport and sediment resuspension in controlling the distribution and fate of pollutants and nutrients. My freshwater work includes studies of groundwater surface water interactions, palaeolimnology and contaminated groundwater.
I am a radiochemist, focussing on the environmental behaviour of naturally occurring radionuclides. I have three main strands to my research:
- Development of radioanalytical techniques for artificial and natural radionuclides in environmental matrices;
- Geochemical cycling of radionuclides;
- The use of radionuclides as tracers of environmental processes.
My PhD work, at the SUERC in East Kilbride, focussed on the optimisation of alpha/beta separation liquid scintillation spectrometry (LSS) and the development of a method for determining 234Th in marine systems. I carried out post-doctoral work at Edinburgh University, including an EU project EUROMARGE, in which we studied trace metal biogeochemistry in the Mediterranean shelf seas, and a NERC Post-doctoral Fellowship, entitled “the elucidation of carbon cycle kinetics in the Mediterranean using natural radionuclides”.
I started work at Lancaster in 1999. I continued working in the Mediterranean, through the EU projects INTERPOL (Impact of Trawling and Natural Events on the Resuspension, dispersion and fate of POLlutants) and ADIOS (Atmospheric Deposition and Impact of pollutants, key elements and nutrients on the Open Mediterranean Sea). In INTERPOL, we used 234Th, 210Pb and 137Cs to study the role of sediment resuspension in controlling the distribution and fate of pollutants and nutrients. In ADIOS, we used naturally-occurring 32P to evaluate the role of Saharan dust in controlling P concentrations in the oligotrophic waters of the eastern Mediterranean.
At the same time, I have developed a range of interests in freshwater systems. Together with Prof. Andrew Binley, I have been using 222Rn to study groundwater – surface water interactions, with a current emphasis on understanding hyporheic zone processes. Additionally, I have been using 210Pb and 137Cs to study sediment accumulation and mixing in lakes vulnerable to eutrophication.
These process studies are supported by on-going projects developing novel methods for the determination of both natural and artificial radionuclides in environmental matrices. A current project, with Prof. Hao Zhang, is the development of DGT (Diffusive Gradients in Thim Films) to investigate the extent and impact of contaminated groundwater at nuclear sites. I have recently received funding to develop a novel method for 7Be analysis in soils and sediments, which we will use to study rapid soil erosion and sediment mixing.
Development and characterisation of a new Sr selective resin for the rapid determination of 90Sr in environmental water samples.
Surman, J., Pates, J., Zhang, H., Happel, S. 1/11/2014 In: Talanta. 129, p. 623-628. 6 p.
Humans and climate as drivers of algal community change in Windermere since 1850
McGowan, S., Barker, P., Haworth, E.Y., Leavitt, P.R., Maberly, S.C., Pates, J. 02/2012 In: Freshwater Biology. 57, 2, p. 260-277. 18 p.
Controls on the spatial and temporal variability of Rn-222 in riparian groundwater in a lowland Chalk catchment.
Mullinger, N.J., Pates, J.M., Binley, A.M., Crook, N.P. 30/09/2009 In: Journal of Hydrology. 376, 1-2, p. 58-69. 12 p.
Vertical zonation of testate amoebae in the Elatia Mires, northern Greece : palaeoecological evidence for a wetland response to recent climate change or autogenic processes?
Payne, R.J., Pates, J.M. 08/2009 In: Wetlands Ecology and Management. 17, 4, p. 355-364. 10 p.
Distribution of artificial radionuclides in deep sediments of the Mediterranean Sea.
Garcia-Orellana, J., Pates, J.M., Masqué, P., Bruach, J.M., Sánchez-Cabeza, J.A. 1/01/2009 In: Science of the Total Environment. 407, 2, p. 887-898. 12 p.
Sediment dynamics in an upland temperate catchment : changing sediment sources, rates and deposition.
Hatfield, R., Maher, B., Pates, J., Barker, P. 11/2008 In: Journal of Paleolimnology. 40, 4, p. 1143-1158. 16 p.
U – salinity relationships in the Mediterranean: implications for 234Th:238U particle flux studies.
Pates, J.M., Muir, G.K.P. 08/2007 In: Marine Chemistry. 106, 3-4, p. 530-545. 16 p.
Radon in Chalk streams: Spatial and temporal variation of groundwater sources in the Pang and Lambourn catchments, UK.
Mullinger, N., Binley, A., Pates, J., Crook, N. 20/06/2007 In: Journal of Hydrology. 339, 3-4, p. 172-182. 11 p.
Variability of dissolved CO2 in the Pang and Lambourn Chalk rivers.
Griffiths, J., Nutter, J., Binley, A., Crook, N., Young, A., Pates, J. 17/01/2007 In: Hydrology and Earth System Sciences. 11, 1, p. 328-339. 12 p.
Determination of Rn-222 in freshwater: development of a robust method of analysis by alpha/beta separation liquid scintillation spectrometry.
Pates, J.M., Mullinger, N.J. 23/08/2006 In: Applied Radiation and Isotopes. 65, 1, p. 92-103. 12 p.
234Th:238U disequilibrium as an indicator of sediment resuspension in the Thermaikos Gulf.
Muir, G.K.P., Pates, J.M., Karageorgis, A.P., Kaberi, H. 12/2005 In: Continental Shelf Research. 25, 19-20, p. 2476-2490. 15 p.
Chemical composition of short sediment cores from Thermaikos Gulf (Eastern Mediterranean): sediment accumulation rates, trawling and winnowing effects.
Karageorgis, A.P., Kaberi, H., Price, N.B., Muir, G.K.P., Pates, J.M., Lykousis, V. 12/2005 In: Continental Shelf Research. 25, 19-20, p. 2456-2475. 20 p.
Development and Performance of the Diffusive Gradients in Thin-Films Technique for the Measurement of Technetium-99 in Seawater.
French, M., Zhang, H., Pates, J.M., Bryan, S., Wilson, R. 1/01/2005 In: Analytical Chemistry. 77, 1, p. 135-139. 5 p.
Changing nutrient levels in Grasmere, English Lake District, during recent centuries.
Barker, P.A., Pates, J.M., Payne, R.J., Healey, R.M. 2005 In: Freshwater Biology. 50, 12, p. 1971-1981. 11 p.
A time efficient method for the determination of Pb-210, Bi-210 and Po-210 in seawater using liquid scintillation spectrometry.
Biggin, C.D., Cook, G.T., MacKenzie, A.B., Pates, J.M. 02/2002 In: Analytical Chemistry. 74, 3, p. 671-677. 7 p.
Spatial and temporal changes in concentration of the elements of suspended particulate matter in the Cretan Sea and their export to the eastern Mediterranean basin.
Price, N.B., Lindsay, F.S., Pates, J.M. 12/1999 In: Progress in Oceanography. 44, 4, p. 677-699. 23 p.
Horizontal distributions of biogenic and lithogenic elements of suspended particulate matter in the Mediterranean Sea.
Price, N.B., Brand, T.D., Pates, J.M., Mowbray, S.R., Civitarese, G., Miserocchi, S., Heussner, S., Lindsay, F.S. 08/1999 In: Progress in Oceanography. 44, 1-3, p. 191-218. 28 p.
The implications of beta energy and quenching for alpha/beta liquid scintillation spectrometry calibration.
Pates, J.M., Cook, G.T., MacKenzie, A.B., Passo, C.J. 1998 In: The Analyst. 123, 10, p. 2201-2207. 7 p.
The determination of 234Th in marine samples using liquid scintillation spectrometry.
Pates, J.M., Cook, G.T., MacKenzie, A.B., Anderson, R., Bury, S.J. 1/11/1996 In: Analytical Chemistry. 68, 21, p. 3783-3788. 6 p.
The development of an alpha / beta separation liquid scintillation cocktail for aqueous samples.
Pates, J.M., Cook, G.T., MacKenzie, A.B., Thomson, J. 08/1993 In: Journal of Radioanalytical and Nuclear Chemistry. 172, 2, p. 341-348. 8 p.