Welcome to ICP Forests

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

The International Co-operative Programme on Assessment and Monitoring of Air Pollution Effects on Forests (ICP Forests) was launched in 1985 under the Convention on Long-range Transboundary Air Pollution (Air Convention, formerly CLRTAP) of the United Nations Economic Commission for Europe (UNECE).

ICP Forests monitors forest condition at two monitoring intensity levels:

The Level I monitoring is based on 5852 observation plots (as at 2019) on a systematic transnational grid of 16 x 16 km throughout Europe and beyond to gain insight into the geographic and temporal variations in forest condition.

The Level II intensive monitoring comprises 623 plots (as at 2018) in selected forest ecosystems with the aim to clarify cause-effect relationships.

At present 42 countries in Europe and beyond participate in ICP Forests.

Blog Posts

ICP Forests Brief No. 4 now available online

We are happy to announce the online publication of the ICP Forests Brief No. 4 titled Increased evidence of nutrient imbalances in forest trees across Europe. You can download this brochure from the ICP Forests website. Printed copies will be available soon.

With best wishes
Alexa Michel, Programme Co-ordinating Centre of ICP Forests

Posted by Alexa Michel on October 23, 2020 at 14:42

10th Deposition and soil solution Working Ring Test 2020

Dear participants of the 10th Deposition and soil solution WRT 2020,

The automatic data evaluation based on the median values has been completed and cross-checked. In total 37 laboratories participated in the exercise.

You can check now the results and qualification report of your laboratory at http://bfw.ac.at/depo/ring_depo.login by entering your laboratory code and your password.

The report can be downloaded at http://icp-forests.net/group/qualityinlaboratories/page/deposition-and-soil-solution-ringtest-and-qa-qc-information 

From now on the requalification procedure starts for the failed parameters for all laboratories that participate in the ICP Forests program, i.e. you need to find the reason for the failed results. The laboratories which did not pass the ring-test…


Posted by Alfred FÜRST on July 9, 2020 at 7:00

36th Task Force Meeting of ICP Forests successfully held online

We would like to express our sincere gratitude to the Swiss Federal Research Institute WSL for a smooth virtual TFM with 76 participants from 28 countries, including presenters from other bodies under the Convention and external guests.

Major results/developments:

  • Adoption of the revisions of all parts of the new ICP Forests Manual 2020.
  • Re-establishment of the Quality Assurance Committee.
  • Serious effects of the COVID-19 pandemic on the forest monitoring activities only in very few countries.
  • New “Data Availabilty Reports" to identify gaps and inconsistencies in the database.
  • New "…

Posted by Alexa Michel on June 16, 2020 at 16:00

36th Task Force Meeting by video conference - 9th ICP Forests Scientific Conference postponed to June 2021

Because of the severe restrictions many countries have imposed to slow the spread of COVID-19, the organizing team of the 9th Scientific Conference and 36th Task Force Meeting of ICP Forests have decided

to hold the 36th ICP Forests Task Force Meeting as a video conference on 11-12 June 2020, and

to postpone the 9th ICP Forests Scientific Conference to 7-9 June 2021

with a post-conference excursion on 11-12 June 2021.

We deeply regret these circumstances but will be happy to welcome you to Zurich in 2021.

Best wishes
Alexa Michel
on behalf of the ICP Forests Programme Co-ordinating Centre

Posted by Alexa Michel on April 3, 2020 at 20:30


Soil spectroscopy

Dear colleagues,as topicality is rising on application of soil spectroscopy for routine analysis by utilizing own created or shared spectral libraries, I am interested if someone could share their knowledge on instrumentation choice? Could someone…Continue

Started by Aldis Butlers Dec 19, 2019.

Choosing brands for some instruments 1 Reply

Dear colleagues,It is planned to purchase a new mill, Kjeldahl Steam Distillation System for N analysis and combined system to analyze pH, EC and alkalinity for water samples for my lab. 1. There are two mills in our lab. One of them is Retsch ZM200…Continue

Started by Rabia GUNHAN. Last reply by Robert Menegotto Apr 30, 2018.


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