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Directive 2008/50/EC of the European Parliament and of the Council of 21 May 2008 on ambient air quality and cleaner air for Europe article annex_VII CELEX: 02008L0050-20150918 OZONE TARGET VALUES AND LONG-TERM OBJECTIVES
A. Definitions and criteria
1. Definitions
AOT40 (expressed in (μg/m3) · hours) means the sum of the difference between hourly concentrations greater than 80 μg/m3 (= 40 parts per billion) and 80 μg/m3 over a given period using only the one-hour values measured between 8.00 and 20.00 Central European Time (CET) each day. 2. Criteria
The following criteria shall be used for checking validity when aggregating data and calculating statistical parameters:
B. Target values
C. Long-term objectives |