Email: ojn@chem.ku.dk

Dr. Ole John Nielsen

Adjunct Professor, Department of Geosciences

Ole John Nielsen (OJ) is a professor of atmospheric chemistry at the University of Copenhagen. Besides being an expert on air pollution and climate change he is interested in leadership, coaching, training (basketball), networking, sustainability, gender equality. He has more than 40 years of experience in natural science research and education. OJ has previously been employed at Risø National Laboratory and Ford Motor Company. He has experience as a board member of foundations and as a member of numerous evaluation committees, advisory boards and funding panels.

Educational Qualification

Ph.D. University of Copenhagen (Atmospheric Chemistry) 1984
M.S. University of Copenhagen (Spectroscopy) 1978

Research Interests

Climate Change
Atmospheric chemistry and hence environmental impact of CFC replacement compounds and of oxygenated species.
Fundamental kinetics and mechanisms of reactions important in atmospheric and combustion chemistry.
Determination of the environmental impact of anthropogenic and natural emissions – out-door as well as in-door chemistry
Atmospheric particulates.
Air pollution chemistry.

Selected Publications

Atmospheric Chemistry of Pentafluorophenol : Kinetics and Mechanism of the Reactions of Cl Atoms and OH Radicals./ Hasager, Freja; Andersen, Simone Thirstrup; Hass, Sofie Askjaer; Sulbaek Andersen, Mads P.; Nielsen, Ole John. In: Journal of Physical Chemistry A, 01.01.2019. Contribution to journal › Journal article › Research › peer-review

Atmospheric Chemistry of Methoxyflurane (CH₃OCF₂CHCl₂) : Kinetics of the gas-phase reactions with OH radicals, Cl atoms and O₃./ Hass, Sofie A.; Andersen, Simone Thirstrup; Sulbaek Andersen, Mads P.; Nielsen, Ole J. In: Chemical Physics Letters, Vol. 722, 2019, p. 119-123. Contribution to journal › Journal article › Research › peer-review

Atmospheric chemistry of CH₃C(O)CN : Kinetics and reaction mechanisms with Cl atoms and OH radicals./ Pedersen, Emilie Bak; Andersen, Simone Thirstrup; Nielsen, Ole John. In: Chemical Physics Letters, Vol. 720, 2019, p. 128-133. Contribution to journal › Journal article › Research › peer-review

Atmospheric chemistry of a cyclic hydro-fluoro-carbon : Kinetics and mechanisms of gas-phase reactions of 1-trifluoromethyl-1,2,2-trifluorocyclobutane with Cl atoms, OH radicals, and O₃./ Andersen, Mads Peter Sulbaek; Nielsen, Ole John. In: Physical Chemistry Chemical Physics, Vol. 21, No. 3, 2019, p. 1497-1505. Contribution to journal › Journal article › Research › peer-review

Quantum yields and N₂O formation from photolysis of solid films of neonicotinoids./ Wang, Weihong; Aregahegn, Kifle Z.; Andersen, Simone T.; Ni, Anton Z.; Rohrbacher, Andrea F.; Nielsen, Ole John; Finlayson-Pitts, Barbara J. In: Journal of Agricultural and Food Chemistry, Vol. 67, No. 6, 2019, p. 1638-1646. Contribution to journal › Journal article › Research › peer-review

Extended Publications (+)

Rate coefficients for reactions of OH radicals with CH ₃D, CH ₂ D ₂ , CHD ₃ , and CD ₄. / Frederickson, Louise Bøge; Andersen, Simone Thirstrup; Nielsen, Ole John. In: International Journal of Chemical Kinetics, Vol. 51, No. 6, 2019, p. 390-394. Contribution to journal › Journal article › Research › peer-review

The Effect of Sampling Inlet Direction and Distance on Particle Source Measurements for Dispersion Modelling./ Jensen, Alexander Christian Osterskov; Poikkimaki, Mikko; Brostrom, Anders; Dal Maso, Miikka; Nielsen, Ole John; Rosenorn, Thomas; Butcher, Andrew; Koponen, Ismo Kalevi; Koivisto, Antti Joonas. In: Aerosol and Air Quality Research, Vol. 19, No. 5, 2019, p. 1114-1125. Contribution to journal › Journal article › Research › peer-review

Atmospheric Chemistry of n-CH₂=CH(CH₂)_xCN (x=0-4) : Kinetics and Mechanisms. / Andersen, Simone Thirstrup; Hass, Sofie Askjæer; Frederickson, Louise Bøge; Nielsen, Ole John. In: Journal of Physical Chemistry A, Vol. 122, No. 28, 2018, p. 5983-5992. Contribution to journal › Journal article › Research › peer-review

Atmospheric chemistry of (Z)-CF₃CH=CHCl : products and mechanisms of the Cl atom, OH radical and O3 reactions, and role of (E)-(Z) isomerization./ Andersen, Mads P. Sulbaek; Solling, Theis I.; Andersen, Lene Loffler; Volkova, Aleksandra; Hovanessian, Dvien; Britzman, Connor; Nielsen, Ole John; Wallington, Timothy J. In: Physical Chemistry Chemical Physics, Vol. 20, No. 44, 2018, p. 27949-27958. Contribution to journal › Journal article › Research › peer-review.
Atmospheric chemistry of n-CH₃(CH₂)_xCN (x=0-3) : Kinetics and mechanisms./ Andersen, Simone Thirstrup; Kyte, Mildrid; Andersen, Lene Loffler; Nielsen, Ole John ; Andersen, Mads P. Sulbæk. In: International Journal of Chemical Kinetics, Vol. 50, No. 11, 2018, p. 813-826. Contribution to journal › Journal article › Research › peer-review

Atmospheric chemistry of hexa- and penta-fluorobenzene: UV photolysis and kinetics and mechanisms of the reactions of Cl atoms and OH radicals./ Andersen, Mads P. Sulbaek; Lengkong, Jonathan W.; Wallberg, Jens; Hasager, Freja; Vo, Karen; Andersen, Simone Thirstrup; Kjaergaard, Henrik G.; Wallington, Timothy J.; Nielsen, Ole John. In: Physical Chemistry Chemical Physics, Vol. 20, No. 45, 2018, p. 28796-28809. Contribution to journal › Journal article › Research › peer-review
Atmospheric chemistry of halogenated organic compounds./ Wallington, Timothy J.; Sulbaek Andersen, Mads P.; Nielsen, Ole John. Advances in Atmospheric Chemistry. ed. / J R Barker; A L Steiner; T J Wallington. Vol. 1 World Scientific, 2017. p. 305-402. Chapter in Book/Report/Conference proceeding › Book chapter › Research › peer-review

Atmospheric Chemistry of (CF₃)₂CF-C≡N : A Replacement Compound for the Most Potent Industrial Greenhouse Gas, SF₆./ Andersen, Mads Peter Sulbæk; Kyte, Mildrid; Thirstrup Andersen, Simone ; Nielsen, Claus J.; Nielsen, Ole John. In: Environmental Science & Technology (Washington), Vol. 51, No. 3, 2017, p. 1321-1329. Contribution to journal › Journal article › Research › peer-review

Atmospheric Chemistry of CH₃CH₂OCH₃: Kinetics and Mechanism of Reactions with Cl Atoms and OH Radicals. / Andersen, Mads Peter Sulbæk; Bjørn Svendsen, Sissel ; Østerstrøm, Freja From; Nielsen, Ole John. In: International Journal of Chemical Kinetics, Vol. 49, No. 1, 2017, p. 10-20. Contribution to journal › Journal article › Research › peer-review

Atmospheric chemistry of Z– and E-CF₃CH=CHCF₃./ Østerstrøm, Freja From; Andersen, Simone Thirstrup; Sølling, Theis Ivan ; Nielsen, Ole John; Andersen, Mads Peter Sulbæk. In: Physical Chemistry Chemical Physics, Vol. 19, No. 1, 2017, p. 735-750. Contribution to journal › Journal article › Research › peer-review

Atmospheric chemistry of hexanenitrile : Kinetics and products of the gas-phase reactions of CH₃(CH₂)₄CN with Cl atoms and OH radicals./ Nielsen, Ole John; Carstens, Cecilie Litske; Lengkong, Jonathan Wilson; Vo, Karen L.; Andersen, Simone Thirstrup; Andersen, Mads P. Sulbaek. In: Chemical Physics Letters, Vol. 688, 2017, p. 7-10. Contribution to journal › Journal article › Research › peer-review

Bærbar partikelmåler til luftforureningsmonitering : Håndholdte målere viser partikelniveauer på stationer i København, London og Tokyo./ Fogde, Nickie Heitmann; Sander, Nanna; Ravelo, José Alejandro A.; Gail, Bartosz; Schmidt, Johan Albrecht; Nielsen, Ole John ; Johnson, Matthew Stanley. In: Dansk Kemi, Vol. 98, No. 8, 2017, p. 35-37. Contribution to journal › Journal article › Research

Local problems are a low research priority./ Nielsen, Ole John. In: Nature, Vol. 544, No. 7648, 2017, p. 35.Contribution to journal › Letter › Research › peer-review
On adduct formation and reactivity in the OCS + OH reaction : A combined theoretical and experimental study./ Schmidt, Johan Albrecht; Kyte, Mildrid; Østerstrøm, Freja From; Joelsson, Magnus; Knap, Hasse Christian; Jørgensen, Solvejg; Nielsen, Ole John; Murakami, Tatsuhiro; Johnson, Matthew Stanley.In: Chemical Physics Letters, Vol. 675, 2017, p. 111-117. Contribution to journal › Journal article › Research › peer-review
Reaction kinetics of (CF₃)₂CFCN with OH radicals as a function of temperature (278-358 K) : A good replacement for greenhouse SF₆? ./ Blázquez , Sergio ; Antiñolo, Maria ; Nielsen, Ole John; Albaladejo, José ; Jiménez, Elena. In: Chemical Physics Letters, Vol. 687, 2017, p. 297-302. Contribution to journal › Journal article › Research › peer-review

Reactions of Three Lactones with Cl, OD, and O₃: Atmospheric Impact and Trends in Furan Reactivity. / Ausmeel, Stina; Andersen, C.; Nielsen, Ole John; Østerstrøm, Freja From; Johnson, Matthew Stanley; Nilsson, E. J. K. In: Journal of Physical Chemistry A, Vol. 121, No. 21, 2017, p. 4123-4131. Contribution to journal › Journal article › Research › peer-review

Awards & Honors

Receiver of the 2007 Nobel Peace Prize as an IPCC lead author.
Receiver of the 2006 Danish Academic Union research price.
Receiver of the 1996 Henry Ford Technology Award.
Member of the Royal Danish Academy of Sciences and Letters since 2008.
Member of the Danish Natural Science Research Council, 1998-2005.
Member of the Danish National Committee for IGBP
Member of the Danish National Committee for Climate Research
Member of the Danish Academy of Technical Sciences (ATV)
Danish member of the International Executive Committee for EUROTRAC (1988-1995)
Appointed adjunct professor in chemistry at Roskilde University (1997-2002)
Head of Copenhagen Global Change Initiative network and PhD-board (1999-2008)
Reviewer for NATO, EU, various National and International Sci. Foundations
Referee for J.Phys.Chem., Int.J.Chem.Kinet., Chem.Phys.Lett., ES&T, Nature.
Member of Editorial Advisory Board of the Int.J.Chem.Kinet. (1994-1997).
Member of the NASA expert group on CFCs, Halons and related species (1991-1993)
Board member of the Collstrup Foundation (2007-2019)
Board member of the Carlsberg Memory Stipend Foundation (2011-2018)
IPCC: Lead Author of a chapter in an IPCC Special Report (2003-2005)
252 Peer-reviewed publications, 37 conference abstracts, 15 book chapters, 27 reports, 31 popular writings, +6700 citations and an H-index of 42.
Supervised 90 students and gives approx 30 presentations per year.