| Concept URI | http://dd.eionet.europa.eu/vocabulary/aq/reportingmetric/AOT40f | 
|---|---|
| Preferred label | AOT 40 forest protection | 
| Definition | Accumulated Ozone Exposure 40 (expressed in (μg/m3) ∙ hours) means the sum of the difference between hourly concentrations greater than 80 μg/m3 and 80 μg/m3 between 1 April to 31 September using only the one-hour values measured between 8.00 and 20.00 Central European Time (CET) each day. | 
| Notation | AOT40f | 
| Status | Valid | 
| Status Modified | 2013-03-22 | 
| Accepted Date | 2013-03-22 | 
| Not Accepted Date | 
European Environment Agency
                        
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