EPNB - Expert Panel on Nitrogen Budgets

The Expert Panel on Nitrogen Budgets (EPNB) provides expert guidance to the Task Force on Reactive Nitrogen in providing mass-consistent information of the fate of nitrogen in the environment. It was initiated at the first meeting of the Task Force in Wageningen, Netherlands, in June 2008 as an ad-hoc expert panel. Between 2008 and 2019, 17 meetings of the EPNB have been organized, many of which coinciding with regular task force meetings. EPNB-18 was held online in October 2021, but at least the co-chairs were able to meet in person in Dessau, Germany.

EPNB prepared the “Guidance Document on National Nitrogen Budgets”. The document was presented and approved at the 31st meeting of the Executive Body of the Convention on Long-Range Transboundary Air Pollution. The document can be downloaded from here. There is also a French and a Russian version available.

The detailed provisions of creating N budgets for seven out of eight pools defined in the GD (and a general overview on definitions and principles) have now been provided by EPNB. These Annexes to the GD are now available for public review. Please download and use the annexes provided as one file here (~7 MB file size). This file version includes all comments received by September 21, 2016, and now also includes the Energy Annex that has been made available in September 2019.

User feedback has been received, and any user is advised to consider when taking advantage of guidance. Please look into this document.  Additional feedback especially on topics that appear during use of these documents will continue to be highly valued even after full adoption. Please download and fill in the review sheet for your feedback, and send it by e-mail to the EPNB co-chairs (Wilfried Winiwarter, winiwarter(at)iiasa.ac.at, and Markus Geupel, markus.geupel(at)uba.de). With the upcoming inclusion of the Waste Annex and a general harmonization, a complete version will be issued.

We will continue posting constructive suggestions along with the guiding material, before improvements are taken up by EPNB and integrated in updated Annexes.

Developments since EPNB-17 have been presented at the virtual TFRN-15, February 4, 2021. A handout of this presentation is available.

EPNB-18 was held as an online meeting, with co-chairs participating jointly from an office at UBA Germany, Dessau, October 5-6, 2021. The minutes of this meeting are available here.


AGENDA EPNB-18 (link to presentation where available)

Day 1, 5 October 2021

BLOCK 1 (2.00 – 3:30 pm CEST)

Status Review, Work Plan 2020-2021

National activities

  • Drafting the first Austrian national budget (Ika Djukic)
  • progress with Swedish NNB (Filip Moldan
  • Latest German Budget and upcoming project (Markus Geupel)

Review of the GP protocol 2022

  • Discussion on the EPNB contribution to the review process
  • Review of the current wording in the text of the protocol with respect to N budgets
  • Request to national experts with last the newsletter
    • Why is it useful to do national nitrogen budgeting?
    • What were the main barriers in national application since its implementation in the last revision of the GP 2012?

BLOCK 2 (4.00 – 5:30 pm CEST)

Footprints activities and tentative cooperation

Day 2, 6 October 2021

BLOCK 3 (2.00 – 3:30 pm CEST)

Integrated Nutrient Management Action Plan (INMAP), as specified in the EU Biodiversity Strategy and Farm-to-Fork Strategy

  • Presentation on the scope of the project ‘Knowledge for INMAP’ (Bruna Grizzetti)

  • Discussion on how N-Budgets could play a role
  • implications for EPNB-work

Further developments on implementing NNBs

  • Review of the EPNB-Guidance and its annexes
  • Development of templates for NNB reporting – discussion of technical requirements

BLOCK 4 (4.00 – 5:30 pm CEST)

International Nitrogen Management System (INMS)

indicator work in INMS



General Note:

EPNB sends updates on their activities in an e-mail newsletter, in addition to material posted here (see EPNB Newsletter April '21). If you wish to become involved, please contact the co-chairs via e-mail. Information on past and current activities, e.g. the minutes of all previous EPNB meetings are also available from this site.