3European Environment Agency (EEA). Assessment of groundrb . level ozone in EEA member countries, with a focus on long- term trends, EEA Technical Report, No 7/2009, ISBN 978 - 92 - 9213 :- 003 - 9 [ R ]. EEA,2009.
4European Environment Agency (EEA). NEC directive status report 2009, Reporting by the member states under Directive 2001/81/EC of the European parliament and of the council of 23 October 2001 on national emission ceilings for certain atmos- pheric pollutants, EEA Technical Report, No 10/2010, ISBN 978 -92 -9213 - 107 -4[ R]. EEA,2010.
5JONSON J,SIMPSON D ,FAGERLI H ,et al. Can we explain the trends in European ozone levels? [ J ]. Atmospheric Chemistry and Physics, 2006,6 : 51 - 66.
6EMEP. European monitoring and evaluation programme[ R/ OL].[ 2009 - 05 - 29]. http ://www. emep. int.
7European Environment Agency (EEA). Air pollution by ozone across Europe during summer 2008, EEA Technical Report, No 2/2009, ISBN 978 - 92 - 9167 - 987 - 4 [ R ]. EEA,2009.
8JENKIN M E. Trends in ozone concentration distribution in the UK since 1990: Local, regional and global influenees[J].Atmospheric Environment,2008,42:5434 - 5445.
9WANG J L,WANG C H,LAI C H,et al. Characterization of o- zone precursors in the Peal River Delta by time series observation of non-methane hydrocarbons [ J ]. Atmospheric Environment ,2008,42 ( 25 ) :6233.
10ZHANG Y H, SU H, ZHONG L J, et al. Regional ozone pollution and observation- based approach for analyzing ozoneprecursors relationship during the PRIDE-PRD2004 campaign [ J ]. Atmospheric Environment, 2008,42 ( 25 ) : 6203.
