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Oxygen flux measurements as a new tracer for the carbon and nitrogen cycles in terrestrialecosystems

Total Cost €


EC-Contrib. €






Project "OXYFLUX" data sheet

The following table provides information about the project.


Organization address
postcode: 37073

contact info
title: n.a.
name: n.a.
surname: n.a.
function: n.a.
email: n.a.
telephone: n.a.
fax: n.a.

 Coordinator Country Germany [DE]
 Project website
 Total cost 1˙999˙502 €
 EC max contribution 1˙999˙502 € (100%)
 Programme 1. H2020-EU.1.1. (EXCELLENT SCIENCE - European Research Council (ERC))
 Code Call ERC-2015-CoG
 Funding Scheme ERC-COG
 Starting year 2016
 Duration (year-month-day) from 2016-10-01   to  2021-09-30


Take a look of project's partnership.

# participants  country  role  EC contrib. [€] 
2    UNIVERSITY OF EAST ANGLIA UK (NORWICH) participant 172˙091.00


 Project objective

Atmospheric oxygen (O2) measurements have proven to be one of the most powerful tools to study the carbon cycle at global scale, quantifying the carbon dioxide (CO2) sink of terrestrial ecosystems and oceans. At ecosystem level, O2 is closely related to CO2 through photosynthesis and respiration, and is influenced by sources of nitrogen during plant uptake. O2 thus carries valuable information about ecosystem processes that cannot be learned from CO2 alone. However, the potential of O2 measurements at ecosystem level has not been exploited. The major hindrance has been the technical challenges faced to measure atmospheric O2 at ppm level against a background concentration of 21%. Motivated by the enormous insights gained from O2 measurements at global level, and with the assistance of proven experts in O2 measurement, OXYFLUX will provide pioneering breakthroughs in both measurement techniques and scientific knowledge of terrestrial ecosystems. Specifically, OXYFLUX will perform the methodological, experimental and modelling work needed to develop O2 as a new tracer for carbon and nitrogen cycle processes at ecosystem level. We will establish the first research group worldwide to perform continuous O2 flux measurements at forest and agricultural field sites, using gas exchange chambers and micrometeorological approaches. These measurements will be utilised further in modelling work where we will integrate O2 into two complementary terrestrial ecosystem models. This will provide the mechanistic understanding for a unique approach to (a) partition CO2 fluxes in e.g. forest ecosystems, (b) improve understanding of the carbon and nitrogen cycle in arable land, and (c) identify the sensitivity of O2 fluxes in terrestrial ecosystems to environmental change. OXYFLUX will firmly establish O2 as a new research tool that can be applied to promote further breakthroughs in a large range of scientific disciplines including environmental, forest and agricultural sciences.


year authors and title journal last update
List of publications.
2018 Alexander Knohl, Emanuel Blei, Jelka Braden-Behrens, Jonathan Jürgensen, Andrew C. Manning, Penelope A. Pickers, Yuan Yan
Oxygen flux measurements as a new tracer for the carbon and nitrogencycles in terrestrial ecosystems
published pages: EGU2018-19833, ISSN: , DOI:
Geophysical Research Abstracts Vol. 20 2019-06-06
2019 Jelka Braden-Behrens, Christian Markwitz, Alexander Knohl
Eddy covariance measurements of the dual-isotope composition of evapotranspiration
published pages: 203-219, ISSN: 0168-1923, DOI: 10.1016/j.agrformet.2019.01.035
Agricultural and Forest Meteorology 269-270 2019-06-06
2017 Alexander Knohl, Emanuel Blei, Andrew C. Manning, Penelope A. Pickers, Yuan Yan
Oxygen flux measurements as a new tracer for the carbon and nitrogen cycles in terrestrial ecosystems
published pages: , ISSN: , DOI:
10th International Carbon Dioxide Conference 2019-06-06

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