Project Scientist

Research Interests

  • AGAGE (Advanced Global Atmospheric Gases Experiment) http://agage.eas.gatech.edu/
  • Global Warming, Climate Change, Greenhouse Gases (GHGs)
  • Stratospheric Ozone Depletion, Ozone Depleting Substances (ODSs)
  • Global and regional emissions, loss processes, and lifetimes of ODSs and GHGs
  • Top-down (measurement based) verification of bottom-up emission estimates
  • Top-down (measurement based) verification of compliance with the Montreal Protocol on Substances that Deplete the Ozone Layer and the Paris Agreement
  • Halogenated trace gases
  • Perfluorinated Compounds (PFCs) and their emissions from global aluminium, rare-earth, and semi-conductor industries
  • Trace gas measurement techniques (GC-FID/ECD, GC/MSD, GC/TOF-MS, PTR-TOF-MS, CRDS)
  • Atmospheric chemistry
  • Wildfire emissions
  • Long-range transport of pollutants

Degrees

  • Diploma in Chemistry, University of Wuppertal
  • Doctor of Natural Sciences, Max Planck Institute for Chemistry, Mainz and Johannes Gutenberg University Mainz

Recent Publications

Prinn, RG, Weiss RF, Arduini J, Arnold T, DeWitt HL, Fraser PJ, Ganesan AL, Gasore J, Harth CM, Hermansen O, Kim J, Krummel PB, Li S, Loh ZM, Lunder CR, Maione M, Manning AJ, Miller BR, Mitrevski B, Mühle J, O'Doherty S, Park S, Reimann S, Rigby M, Saito T, Salameh PK, Schmidt R, Simmonds PG, Steele LP, Vollmer MK, Wang RH, Yao B, Yokouchi Y, Young D, Zhou L.  2018.  History of chemically and radiatively important atmospheric gases from the Advanced Global Atmospheric Gases Experiment (AGAGE). Earth Syst. Sci. Data. 10:985-1018.: Copernicus Publications   10.5194/essd-10-985-2018   AbstractWebsite
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Park, S, Li S, Mühle J, O'Doherty S, Weiss RF, Fang X, Reimann S, Prinn RG.  2018.  Toward resolving the budget discrepancy of ozone-depleting carbon tetrachloride (CCl4): an analysis of top-down emissions from China. Atmospheric Chemistry and Physics. 18:11729-11738.: Copernicus Publications   10.5194/acp-18-11729-2018   AbstractWebsite
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Arnold, T, Manning AJ, Kim J, Li S, Webster H, Thomson D, Mühle J, Weiss RF, Park S, O'Doherty S.  2018.  Inverse modelling of CF4 and NF3 emissions in East Asia. Atmospheric Chemistry and Physics. 18:13305-13320.: Copernicus Publications   10.5194/acp-18-13305-2018   AbstractWebsite
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Park, S, Li S, Mühle J, O'Doherty S, Weiss RF, Fang X, Reimann S, Prinn RG.  2018.  Toward resolving the budget discrepancy of ozone-depleting carbon tetrachloride (CCl4): an analysis of top-down emissions from China. Atmospheric Chemistry and Physics. 18:11729-11738.: Copernicus Publications   10.5194/acp-18-11729-2018   AbstractWebsite
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Leedham Elvidge, E, Bönisch H, Brenninkmeijer CAM, Engel A, Fraser PJ, Gallacher E, Langenfelds R, Mühle J, Oram DE, Ray EA, Ridley AR, Röckmann T, Sturges WT, Weiss RF, Laube JC.  2018.  Evaluation of stratospheric age of air from CF4, C2F6, C3F8, CHF3, HFC-125, HFC-227ea and SF6; implications for the calculations of halocarbon lifetimes, fractional release facto. Atmospheric Chemistry and Physics. 18:3369-3385.: Copernicus Publications   10.5194/acp-18-3369-2018   AbstractWebsite

In a changing climate, potential stratospheric circulation changes require long-term monitoring. Stratospheric trace gas measurements are often used as a proxy for stratospheric circulation changes via the “mean age of air” values derived from them. In this study, we investigated five potential age of air tracers – the perfluorocarbons CF4, C2F6 andC3F8 and the hydrofluorocarbons CHF3 (HFC-23) and HFC-125 – and compare them to the traditional tracer SF6 and a (relatively) shorter-lived species, HFC-227ea. A detailed uncertainty analysis was performed on mean ages derived from these “new” tracers to allow us to confidently compare their efficacy as age tracers to the existing tracer, SF6. Our resultsshowed that uncertainties associated with the mean age derived from these new age tracers are similar to those derived from SF6, suggesting that these alternative compounds are suitable in this respect for use as age tracers. Independent verification of the suitability of these age tracers is provided by a comparison between samples analysed at the Universityof East Anglia and the Scripps Institution of Oceanography. All five tracers give younger mean ages than SF6, a discrepancy that increases with increasing mean age. Our findings qualitatively support recent work that suggests that the stratospheric lifetime of SF6 is significantly less than the previous estimate of 3200 years. The impact of these younger meanages on three policy-relevant parameters – stratospheric lifetimes, fractional release factors (FRFs) and ozone depletion potentials – is investigated in combination with a recently improved methodology to calculate FRFs. Updates to previous estimations for these parameters are provided.

Vollmer, MK, Young D, Trudinger CM, Mühle J, Henne S, Rigby M, Park S, Li S, Guillevic M, Mitrevski B, Harth CM, Miller BR, Reimann S, Yao B, Steele LP, Wyss SA, Lunder CR, Arduini J, McCulloch A, Wu S, Rhee TS, Wang RHJ, Salameh PK, Hermansen O, Hill M, Langenfelds RL, Ivy D, O'Doherty S, Krummel PB, Maione M, Etheridge DM, Zhou L, Fraser PJ, Prinn RG, Weiss RF, Simmonds PG.  2018.  Atmospheric histories and emissions of chlorofluorocarbons CFC-13 (CClF3), ΣCFC-114 (C2Cl2F4), and CFC-115 (C2ClF5). Atmospheric Chemistry and Physics. 18:979-1002.: Copernicus Publications   10.5194/acp-18-979-2018   AbstractWebsite
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