Biography

I graduated from the University of York in 1985 with an Honours degree in Chemistry. Since then I have worked and studied at UEA, obtaining an M.Sc. in Atmospheric Science in 1987, followed by a Ph.D. I currently have a postdoctoral research position within the Atmospheric Composition Directorate of the National Centre for Atmospheric Science (NCAS) and am based in the Trace Gas Laboratory which forms part of LGMAC.

I have many years experience making measurements of atmospheric trace gases using a variety of analytical techniques, including gas chromatography (GC) and gas chromatography – mass spectrometry (GC-MS). One of my main research interests is in the global distribution and temporal trends of natural and anthropogenic halocarbons in the background atmosphere. Halocarbons are largely responsible for the observed depletion of stratospheric ozone and, as a result, the production of many of these chlorine and bromine-containing compounds has been phased out under the terms of the Montreal Protocol. In addition, some halocarbons are potent greenhouse gases and have been included in the recent Kyoto Protocol, which aims to reduce greenhouse gas emissions over the next 10-20 years. Air samples are routinely collected from various locations and platforms around the world, including aircraft (CARIBICFAAM), ships and selected ground-based stations (Cape Grim, Tasmania; Mace Head, Ireland; Weybourne, UK). The halocarbon data have featured regularly in international scientific assessments, including the quadrennial WMO/UNEP Assessment of Stratospheric Ozone Depletion and various IPCC reports on greenhouse gases and climate change.

More recently I have been using a relatively-new technique (proton transfer reaction mass spectrometry, or PTR-MS) for making measurements of other types of volatile organic compounds (e.g. hydrocarbons, oxygenated hydrocarbons) in the atmosphere. These compounds play an important role in the photochemical production of ozone in the troposphere. Currently we have one ground-based instrument, which is deployed at the Weybourne Atmospheric Observatory for long-term observations; and one aircraft instrument, which operates during intensive flying campaigns on the UK atmospheric research aircraft (FAAM). In recent years these campaigns have included deployments in the Azores (ICARTT, 2004) and West Africa (AMMA, 2006). 

Additional Contacts

Fax: +44 (0)1603 591327

All Publications

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Oram, D. E., Ashfold, M. J., Laube, J. C., Gooch, L. J., Humphrey, S., Sturges, W. T., Leedham-Elvidge, E. C., Forster, G. L., Harris, N. R. P., Mead, M. I., Samah, A. A., Phang, S. M., Ou-Yang, C., Lin, N., Wang, J., Baker, A. K., Brenninkmeijer, C. A. M., Sherry, D.

(2017)

A growing threat to the ozone layer from short-lived anthropogenic chlorocarbons,

in Atmospheric Chemistry and Physics

17

(19)

pp. 11929-11941

Full Text UEA Repository

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Thorenz, U., Baker, A., Elvidge, E. L., Sauvage, C., Riede, H., van Velthoven, P., Hermann, M., Weigelt, A., Oram, D., Brenninkmeijer, C., Zahn, A., Williams, J.

(2017)

Investigating African trace gas sources, vertical transport, and oxidation using IAGOS-CARIBIC measurements between Germany and South Africa between 2009 and 2011,

in Atmospheric Environment

158

pp. 11-26

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Laube, J. C., Mohd Hanif, N., Martinerie, P., Gallacher, E., Fraser, P. J., Langenfelds, R., Brenninkmeijer, C. A. M., Schwander, J., Witrant, E., Wang, J., Ou-Yang, C., Gooch, L. J., Reeves, C. E., Sturges, W. T., Oram, D. E.

(2016)

Tropospheric observations of CFC-114 and CFC-114a with a focus on long-term trends and emissions,

in Atmospheric Chemistry and Physics

16

(23)

pp. 15347-15358

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Baker, A. K., Sauvage, C., Thorenz, U. R., Van Velthoven, P., Oram, D. E., Zahn, A., Brenninkmeijer, C. A. M., Williams, J.

(2016)

Evidence for strong, widespread chlorine radical chemistry associated with pollution outflow from continental Asia,

in Scientific Reports

6

article no. 36821

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Schmidt, J. A., Jacob, D. J., Horowitz, H. M., Hu, L., Sherwen, T., Evans, M. J., Liang, Q., Suleiman, R. M., Oram, D. E., Le Breton, M., Percival, C. J., Wang, S., Dix, B., Volkamer, R.

(2016)

Modeling the observed tropospheric BrO background: Importance of multiphase chemistry and implications for ozone, OH, and mercury,

in Journal of Geophysical Research: Atmospheres

121

(19)

pp. 11819-11835

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Hossaini, R., Patra, P. K., Leeson, A. A., Krysztofiak, G., Abraham, N. L., Andrews, S. J., Archibald, A. T., Aschmann, J., Atlas, E. L., Belikov, D. A., Bönisch, H., Carpenter, L. J., Dhomse, S., Dorf, M., Engel, A., Feng, W., Fuhlbrügge, S., Griffiths, P. T., Harris, N. R. P., Hommel, R., Keber, T., Krüger, K., Lennartz, S. T., Maksyutov, S., Mantle, H., Mills, G. P., Miller, B., Montzka, S. A., Moore, F., Navarro, M. A., Oram, D. E., Pfeilsticker, K., Pyle, J. A., Quack, B., Robinson, A. D., Saikawa, E., Saiz-Lopez, A., Sala, S., Sinnhuber, B., Taguchi, S., Tegtmeier, S., Lidster, R. T., Wilson, C., Ziska, F.

(2016)

A multi-model intercomparison of halogenated very short-lived substances (TransCom-VSLS): linking oceanic emissions and tropospheric transport for a reconciled estimate of the stratospheric source gas injection of bromine,

in Atmospheric Chemistry and Physics

16

(14)

pp. 9163-9187

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Dunmore, R., Hopkins, J., Lidster, R., Mead, M. I., Bandy, B., Forster, G., Oram, D., Sturges, W., Phang, S., Samah, A. A., Hamilton, J.

(2016)

Development of a Combined Heart-Cut and Comprehensive Two-Dimensional Gas Chromatography System to Extend the Carbon Range of Volatile Organic Compounds Analysis in a Single Instrument,

in Separations

3

(3)

article no. 21

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Umezawa, T., Baker, A. K., Brenninkmeijer, C. A. M., Zahn, A., Oram, D. E., van Velthoven, P. F. J.

(2015)

Methyl chloride as a tracer of tropical tropospheric air in the lowermost stratosphere inferred from IAGOS-CARIBIC passenger aircraft measurements,

in Journal of Geophysical Research: Atmospheres

120

(23)

pp. 12313–12326

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Vollmer, M., Rigby, M., Laube, J., Henne, S., Rhee, T. S., Gooch, L., Wenger, A., Young, D., Steele, P., Langenfelds, R., Brenninkmeijer, C., Wang, J., Ou-Yang, C., Wyss, S., Hill, M., Oram, D., Krummel, P., Schoenenberger, F., Zellweger, C., Fraser, P., Sturges, W., O'Doherty, S., Reimann, S.

(2015)

Abrupt reversal in emissions and atmospheric abundance of HCFC-133a (CF3CH2Cl),

in Geophysical Research Letters

42

(20)

pp. 8702–8710

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Lennartz, S. T., Krysztofiak, G., Marandino, C. A., Sinnhuber, B., Tegtmeier, S., Ziska, F., Hossaini, R., Krüger, K., Montzka, S. A., Atlas, E., Oram, D. E., Keber, T., Bönisch, H., Quack, B.

(2015)

Modelling marine emissions and atmospheric distributions of halocarbons and dimethyl sulfide: the influence of prescribed water concentration vs. prescribed emissions,

in Atmospheric Chemistry and Physics

15

(20)

pp. 11753-11772

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Ganesan, A., Manning, A., Grant, A., Young, D., Oram, D., Sturges, B., Moncrieff, J., O'Doherty, S.

(2015)

Quantifying methane and nitrous oxide emissions from the UK and Ireland using a national-scale monitoring network,

in Atmospheric Chemistry and Physics

15

pp. 6393–6406

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Leedham Elvidge, E., Oram, D. E., Laube, J. C., Baker, A., Montzka, S. A., Humphrey, S., O'Sullivan, D. A., Brenninkmeijer, C. A. M.

(2015)

Increasing concentrations of dichloromethane, CH2Cl2, inferred from CARIBIC air samples collected 1998–2012,

in Atmospheric Chemistry and Physics

15

(4)

pp. 1939-1958

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Taylor, J., Allan, J., Allen, G., Coe, H., Williams, P., Flynn, M., Le Breton, M., Muller, J., Percival, C., Oram, D., Forster, G., Lee, J., Rickard, A., Parrington, M., Palmer, P.

(2014)

Size-dependent wet removal of black carbon in Canadian biomass burning plumes,

in Atmospheric Chemistry and Physics

14

(24)

pp. 13755-13771

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Allan, J., Morgan, W., Darbyshire, E., Flynn, M., Williams, P., Oram, D., Artaxo, P., Brito, J., Lee, J., Coe, H.

(2014)

Airborne observations of IEPOX-derived isoprene SOA in the Amazon during SAMBBA,

in Atmospheric Chemistry and Physics

14

(20)

pp. 11393-11407

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Baker, A., Traud, S., Brenninkmeijer, C., Hoor, P., Neumaier, M., Oram, D., Rauthe-Schöch, A., Sprung, D., Schloegl, S., Slemr, F., van Velthoven, P., Wernli, H., Zahn, A., Ziereis, H.

(2014)

Pollution patterns in the upper troposphere over Europe and Asia observed by CARIBIC,

in Atmospheric Environment

96

pp. 245-256

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Mohd Nadzir, M. S., Phang, S. M., Abas, M. R., Abdul Rahman, N., Abu Samah, A., Sturges, W. T., Oram, D. E., Mills, G. P., Leedham, E. C., Pyle, J. A., Harris, N. R. P., Robinson, A. D., Ashfold, M. J., Mead, M. I., Latif, M. T., Khan, M. F., Amiruddin, A. M., Banan, N., Hanafiah, M. M.

(2014)

Bromocarbons in the tropical coastal and open ocean atmosphere during the 2009 Prime Expedition Scientific Cruise (PESC-09),

in Atmospheric Chemistry and Physics

14

(15)

pp. 8137-8148

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Sala, S., Bönisch, H., Keber, T., Oram, D., Mills, G., Engel, A.

(2014)

Deriving an atmospheric budget of total organic bromine using airborne in situ measurements from the western Pacific area during SHIVA,

in Atmospheric Chemistry and Physics

14

(13)

pp. 6903-6923

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Kloss, C., Newland, M., Oram, D., Fraser, P. J., Brenninkmeijer, C. A. M., Röckmann, T., Laube, J.

(2014)

Atmospheric Abundances, Trends and Emissions of CFC-216ba, CFC-216ca and HCFC-225ca,

in Atmosphere

5

(2)

pp. 420-434

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Umezawa, T., Baker, A., Oram, D., Sauvage, C., O'Sullivan, D., Rauthe-Schöch, A., Montzka, S., Zahn, A., Brenninkmeijer, C.

(2014)

Methyl chloride in the upper troposphere observed by the CARIBIC passenger aircraft observatory: Large-scale distributions and Asian summer monsoon outflow,

in Journal of Geophysical Research: Atmospheres

119

(9)

pp. 5542-5558

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Wisher, A., Oram, D., Laube, J., Mills, G., Van Velthoven, P., Zahn, A., Brenninkmeijer, C.

(2014)

Very short-lived bromomethanes measured by the CARIBIC observatory over the North Atlantic, Africa and Southeast Asia during 2009-2013,

in Atmospheric Chemistry and Physics

14

(7)

pp. 3557-3570

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Key Research Interests

Atmospheric composition and chemistry; global distribution, sources and temporal trends of ozone-depleting chemicals and greenhouse gases; role of volatile organic compounds (VOCs) and oxygenated VOCs in tropospheric chemistry; analytical techniques for atmospheric measurements including GC, GC-MS and PTR-MS.

Significant Publications

  • Oram, D.E., (2005). Chlorofluorocarbons and other halocarbons, in Encyclopedia of Analytical Science, Second Edition (Paul J. Worsfold, Alan Townshend and Colin F. Poole, eds.), Elsevier, Oxford, Vol. 2, pp. 80-89.
  • Krol, M.C., J. Lelieveld, D.E. Oram, G.A. Sturrock, S.A. Penkett, C.A.M. Brenninkmeijer, V. Gros, J. Williams and H.A. Scheeren (2003). Continuing emissions of methyl chloroform from Europe, Nature, 421, 131-135.
  • Sturges, W.T., T.J. Wallington, M.D. Hurley, K.P. Shine, K. Sihra, A. Engel, D.E. Oram, S.A. Penkett, R. Mulvaneyand C.A.M. Brenninkmeijer (2000). A potent greenhouse gas identified in the atmosphere: SF5CF3Science, 289, 611-613, DOI: 10.1126/science.289.5479.611.
  • Fraser, P.J., D.E. Oram, C.E. Reeves, S.A. Penkett and A. McCulloch (1999). Southern hemispheric halon trends (1978-1998) and global halon emissions, J. Geophys. Res., 104, 15985-15999, DOI: 10.1029/1999JD900113.
  • Oram, D.E., W.T. Sturges, S.A. Penkett, A. McCulloch and P.J. Fraser (1998). Growth of fluoroform (CHF3, HFC-23) in the background atmosphere, Geophys. Res. Lett., 25, 35-38, DOI: 10.1029/97GL03483.
  • Oram, D.E., C.E. Reeves, P.J. Fraser and S.A. Penkett (1995). Measurements of HCFC-142b and HCFC-141b in the Cape Grim air archive: 1978-1993, Geophys. Res. Lett., 22, 2741-2744, DOI: 10.1029/95GL02849.