Welcome to ICP Forests

– the International Co-operative Programme on Assessment and Monitoring of Air Pollution Effects on Forests operating under the UNECE Convention on Long-range Transboundary Air Pollution (CLRTAP) –

A programme aiming at a comprehensive compilation of information on the condition of forests in Europe and beyond

ICP Forests was launched in 1985 under the Convention on Long-range Transboundary Air Pollution (CLRTAP) of the United Nations Economic Commission for Europe (UNECE) in response to wide public and political concern over extensive forest damage that had been observed in Europe in the beginning of the 1980s. ICP Forests monitors forest condition in Europe at two monitoring intensity levels: The Level I monitoring is based on around 6000 observation plots on a systematic transnational grid of 16 x 16 km throughout Europe to gain insight into the geographic and temporal variations in forest condition while the Level II intensive monitoring comprises around 500 plots in selected forest ecosystems with the aim to clarify cause-effect relationships. At present 42 countries participate in ICP Forests.

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Blog Posts

30 Years Anniversary Report - Photos

Dear All,


While a lot of you received the call below by email I would like to draw your intention to our request for photos. I hope that we can collect pictures from meetings or field trips to show the history of ICP Forests. Please send them to:


Thank you in advance and best wishes,



With the 30 years anniversary of ICP Forests this year we are looking into the past, as well as in the future. The future with our new strategy and the rich past of 30 years of forest monitoring and joint efforts to protect our forests as well as working on the scientific forefront.


To celebrate this occasion we would like to collect your impressions from the last 30 years. Therefore we would like to ask each NFC to provide…


Posted by Tanja Sanders on April 20, 2015 at 11:00

30 Years ICP Forests

Dear all,

ICP Forests has entered its 30th anniversary. ICP Forests has under the CLRTAP achieved quite a lot during the past three decades, however, there is still a lot of challenges left. To get more awareness about both the achievements and the challenges I designed a kind of logo. Please, make extensive use of it in various communications, however, if there are other proposals, please, post them here.

Best regards



Posted by Walter Seidling on March 8, 2015 at 10:30

Announcement 8th ICP Forests soil Interlaboratory comparison

The Croatian Forest Research Institute is glad to be able to invite the Laboratories to participate in 8th ICP Forests soil Interlaboratory comparison. 

All the necessary information you will be able to find in Invitation_letter_SOIL.pdf


For any questions, please get in touch with:

Dr.sc. Tamara Jakovljević

Head of laboratory
Hrvatski šumarski institut/
Croatian Forest Research Institute
Cvjetno naselje 41
10 450 Jastrebarsko

tel: + 385 1 6273 025
GSM: + 385 98 339 860
e-mail: tamaraj@sumins.hr


Posted by Nathalie Cools on February 25, 2015 at 14:44

4th ICP Forests Scientific Conference, Ljubljana, 19-20 May 2015

It is our pleasure to invite you to the

4th ICP Forests Scientific Conference

"Long-term trend and effects of air pollution on forest ecosystems, their services, and sustainability"

that will be held in Ljubljana, Slovenia, from 19-20 May 2015.

Main topics include:

  • The temporal development (possibly with predictions) of air pollution effects on forests, including nitrogen deposition and ozone impacts, on different spatial scales
  • Temporal and spatial development of forest performance indicators, forest ecosystem services, their sustainability and interactions with climate trends
  • Integrative analyses and modeling exercises based on the above indicated data

The Conference will bring together scientists and experts from ICP Forests, the UNECE ICPs community under the Working Group on Effects (WGE), partners and respective stakeholders, as well as interested scientists and…


Posted by Alexa Michel on January 19, 2015 at 15:52


Upcoming workshop: Environmental change and forest ectomycorrhizal fungi. 8-9 October 2015

Dear all,I would like to announce that we will organise a workshop on 8-9 October 2015 at the Royal Botanic Gardens Kew in London, with the topic environmental change and forest ectomycorrhizal…Continue

Started by Sietse van der linde Mar 30.

Soil Sample Laboratory Test 1 Reply

I would like to know about Soil Sample Laboratory Test, are we going to have it in 2014 year. Best regards, Radovan Nevenic, NFC Serbia.Continue

Started by Radovan Nevenic. Last reply by Nathalie Cools May 7, 2014.


Latest Activity

Profile IconChristian Lundmark Jensen and rijan tamrakar joined ICP Forests
Stephan Raspe joined Stavros Veresoglou's group

Study on drivers of phenological change.

EP Pheno, Damages & Foliage: This project aims to study underlying drivers of tree phenology on ICP Forests Level II plots. Data: Phenology, defoliation, foliar N and P from Level II plots in France, Belgium, Germany, Italy, Spain, Luxembourg, Hungary, Romania and Slovenia. Detailed information about the project can be found in the attached document.See More
Profile IconRiccardo Testolin and Covadonga Prendes Pérez joined ICP Forests
Mitja Skudnik joined Peter Waldner's group


Explore the mapping of nitrate leaching risk for Forests (Switzerland + Central Europe)Data: Level IIParticipation: Ask for Group MembershipSee More
Profile IconRodrigo Arantes Reis and Bora Florin Dumitru joined ICP Forests
Jul 23
Nicholas John Clarke joined Karin Hansen's group

Comparison ICP Forests - EMEP deposition

This group discusses three studies that aim on comparing ICP Forests and EMEP deposition estimates with slightly different purposes. Since they all aim at comparisons between ICP Forests and EMEP we joined them in the same group.The objectives of the three studies are:Comparison of measured ICP Forests bulk and throughfall deposition with modelled EMEP (50 x 50 km grid model and if agreed also the 7 x 7 km grid) for the years 2009-11 (Lead: Aldo Marchetto)Comparison of temporal trend of EMEP…See More
Jul 22
Bruno Enrico Leone Cerabolini is now a member of ICP Forests
Jul 16
Profile IconPernille Karlog and Winfried Riek joined ICP Forests
Jul 13

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