Division I General remarks

Assessment of phenology in accordance with Article 6(c) shall be carried out on an optional basis on Level II plots. Where phenology is assessed the following provisions shall apply.

The following provisions are based on technical recommendations of Expert Panel on Meteorology and Phenology of the UNECE International Cooperative Programme on Assessment and Monitoring of Air Pollution Effects on Forests (ICP Forests). [Reference is made to the sub-manual prepared by this Expert Panel where additional information is made available.]