Global research alliance N2O chamber methodology guidelines: Considerations for automated flux measurement

Peter Grace*, Tony van der Weerden, David Rowlings, Clemens Scheer, Christian Brunk, Ralf Kiese, Klaus Butterbach-Bahl, RM Rees, Philip Robertson, Ute M. Skiba

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

28 Citations (Scopus)
65 Downloads (Pure)


Nitrous oxide (N 2O) emissions are highly episodic in response to nitrogen additions and changes in soil moisture. Automated gas sampling provides the necessary high temporal frequency to capture these emission events in real time, ensuring the development of accurate N 2O inventories and effective mitigation strategies to reduce global warming. This paper outlines the design and operational considerations of automated chamber systems including chamber design and deployment, frequency of gas sampling, and options in terms of the analysis of gas samples. The basic hardware and software requirements for automated chambers are described, including the major challenges and obstacles in their implementation and operation in a wide range of environments. Detailed descriptions are provided of automated systems that have been deployed to assess the impacts of agronomy on the emissions of N 2O and other significant greenhouse gases. This information will assist researchers across the world in the successful deployment and operation of automated N 2O chamber systems.

Original languageEnglish
Pages (from-to)1126-1140
Number of pages15
JournalJournal of Environmental Quality
Issue number5
Early online date17 Jul 2020
Publication statusPrint publication - Sept 2020

Bibliographical note

© 2020 The Authors. Journal of Environmental Quality published by Wiley Periodicals LLC on behalf of American Society of Agronomy, Crop Science Society of America, and Soil Science Society of America.


  • Greenhouse Gases
  • Nitrogen
  • Nitrous Oxide/analysis
  • Soil


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