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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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

2014 Technical Report available online

Dear Colleagues,

The ICP Forests 2014 Technical Report is now available online. If you have not received a personal copy of this report by the end of this month but would like to have one, please send a request to

With best wishes

Posted by Alexa Michel on January 19, 2015 at 15:51

17th Needle/Leaf Interlaboratory Test 2014/2015 - Final Report

Dear colleagues,

the results of the 17th Needle/Leaf Interlaboratory Test are available on the FFCC homepage. The qualification reports can be downloaded from the ringtest web-interface. You had to login here with your lab code and your password. The following ICP-Forests laboratories (=laboratories analysing monitoring samples from the vegetation period 2014) had to re-qualify for some parameters:

A47: C

A60: Pb

F06: S, P, Mg

F24: P, K, C

F28: Mg

F29: Ca, Mg, Zn, Cu, Cd

Please, keep in mind that the requalification for ICP-Forests laboratories  must be finished before 1st of September…


Posted by Alfred FÜRST on January 15, 2015 at 9:00

A research on radioactivity in Mount Ida (Kazdagi)/ Turkey

In 2010–2012, an extensive study was performed in forest sites of Mount IDA (Kazdagi)/Edremit 26 years after the Chernobyl accident. The 137Cs activity concentrations were determined by gamma-ray spectrometry in the forest soil layers (OL, OF + OH and A horizons) separately. Based on 341 surface soil samples and 118 soil profiles, activity concentrations of 137Cs in OL horizons varied between 0.25 ± 0.14 and 70 ± 1 Bq kg−1, while the ranges of 137Cs activity concentrations in OF + OH and A horizons were 13 ± 1–555 ± 3 Bq kg−1 and 2 ± 1–253 ± 2 Bq kg−1, respectively. Cesium-137 deposition in the study area was estimated to be in the range of 1–39 kBq m−2 and a linear relationship between the deposition of 137Cs and the altitude was observed. The distributions of 137Cs activities in OL, OF + OH and A horizons throughout the region were mapped in detail. The highest 137Cs activities were found in OF + OH horizons, with markedly lower 137Cs activity in mineral horizons of soil profiles.… Continue

Posted by Hidayet Karakurt on November 7, 2014 at 12:03 — 2 Comments


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.


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Jan 22
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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
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Alexa Michel posted blog posts
Jan 19
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Jan 19
An event by Alexa Michel was featured

4th ICP Forests Scientific Conference at Ljubljana, Slovenia

May 19, 2015 at 4pm to May 21, 2015 at 2pm
The 4th ICP Forests Scientific Conference with the title "Long-term trend and effects of air pollution on forest ecosystems, their services, and sustainability" will be held in Ljubljana, Slovenia, on May 19-20, 2015 in conjunction with the ICP Forests 31st Task Force Meeting. Attendance of the excursion on May 21 is optional.Online Registration…See More
Jan 19

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