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23. October, 12:30 24. October 2019, 17:30

Empa Dübendorf

Scope and focus

The main objective of this user workshop is to foster knowledge exchange and collaboration among experts from multiple research fields, related to the N2O cycle. This includes research topics like advanced analytical methods, reaction kinetics and theory of isotope effects of N2O up to data inter-pretation by applying up-to-date modelling approaches. The following scientific questions will be ad-dressed:


Which analytical techniques should I select for my experiment?

Provide information on state of the art techniques, pros and cons and their benchmark performance.


What are the reaction mechanisms responsible for N2O production / destruction?

Provide know-how on reaction pathways, intermediates and associated isotope fractionation effects.


Which experimental design/modelling approach will answer my research questions?

Provide an overview on natural abundance and 15N tracer techniques as well as modelling approaches.


Introductory Presentation

Naohiro Yoshida / Tokyo Institute of Technology: N2O isotope researches from bulk d15N and d18O to clumped D458, D548, D556


Invited Presentations

Sakae Toyoda / Tokyo Institute of Technology: N2O isotopocule analysis by IRMS to

detect and interpret long-term trends in atmospheric N2O


Stephen Harris / University of New South Wales: Performance of state-of the art laser

spectroscopy for N2O isotopes


Margareta R. A. Blomberg / University of Stockholm: Mechanism for N2O generation

by bacterial NO reductase


Matthew Johnson / University of Copenhagen: Isotopic fractionation in N2O photolysis

in the stratosphere


Nathaniel Ostrom / Michigan State University: Understanding the conservative and

non-conservative behavior of stable isotopes as tracers of microbial N2O production



Christoph Müller / University of Giessen: Quanti?cation of N transformation pathways

via 15N tracer modelling



Registration and Oral/Poster Presentations

Participants may register until August 31, 2019. Please follow this link to proceed with registration. You will be forwarded to Xing Events.


If you would like to present your research in a talk or a poster, please submit a one-page abstract, available via N2Oworkshop@empa.ch. Please also send the completed form to N2Oworkshop@empa.ch until August 31, 2019.


Fees and Payment

The workshop fee of CHF 130.– will cover lunch, Fondue dinner event and snacks during coffee breaks. Unfortunately the number of participants for the Fondue event is limited to 50 and will be handled on a first come / first served base, so be quick!


For cancellations after August 31, 2019, 50% of the fee will be charged. After October 2, 2019, or in case of non appearance, we will charge the full fee. A substitute will be accepted anytime



Overnight accommodation should be arranged individually. Hotels around the Empa campus can be found via this link. Please mention your participation at the Empa workshop to get a discount.


Scientific Committee:

Dr Joachim Mohn / Empa

Prof. Johan Six / ETH Zürich

Prof. Moritz F. Lehmann / University of Basel


Key Dates

April 15, 2019 Start of registration

August 31, 2019 Deadline abstract submission to N2Oworkshop@empa.ch

August 31, 2019 Deadline registration

October 23 – 24, 2019 Workshop