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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ICP Forests 2015 Technical Report available online

Dear members and friends of the ICP Forests community,

We are happy to inform you about the online publication of the 2015 Technical Report of ICP Forests - Forest Condition in Europe.

You can download the report (25 MB) under this link until September 6. The password is TR2015.

It will then be available on the ICP Forests website at:…


Posted by Alexa Michel on August 26, 2015 at 13:56

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: 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


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


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

ROCIO GARCIA MARTINEZ is now a member of ICP Forests
Alexa Michel posted an event

Final COST STReESS meeting at Ringhotel Schorfheide

April 12, 2016 to April 14, 2016
Final meeting of the COST Action STReESS – Studying Tree Responses to extreme Events: a SynthesiSSee More
Tommaso La Mantia is now a member of ICP Forests
Marcus Schaub joined Walter Seidling's group

WGE Trend Report

Forum around the trend Report inintiated by WGESee More
Profile IconDaniele Pezzotta, Reinhard Kallweit and Silvano Fares joined ICP Forests
Oct 7
Silvano Fares joined Marcus Schaub's group

Ozone exposures

The group focuses on the evaluation of tropospheric ozone exposures from passive samplers and real-time monitors (see ICP Forests Manual part XV). We aim at investigating temporal and spatial trends of ozone concentrations, based on Level II data from the last 10 years. The analyses are embedded in a broader evaluation and publication concept on ozone risk assessment across Europe. For detailed info, see…See More
Oct 6
Silvano Fares joined Marcus Schaub's group

Ozone flux

The group focuses on the assessment of ozone flux into forest ecosystems. We aim at applying the DO3SE model for Level II plots across Europe. The analyses are embedded in a broader evaluation and publication concept on ozone risk assessment across Europe. For detailed info, see EP Ambient Air Quality.See More
Oct 6
James Johnson joined Canullo Roberto's group

Internal Evaluation L1-Biodiversity

The discussion group is intended as a showcase to appreciate the state of the art on the internal evaluation process handling L1-Biodiversity datasets.The topics which have been launched by the EP on Biodiversity and Ground Vegetation, together with EP on Growth, will be described, and updated.Each research topic, leaded by an internal member of the ICP Forests community, will be afforded within a strict Working Group (private), edited for merely information. Only invited members, contributing…See More
Oct 5

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