作者: MJ Sanz , V Calatayud , G Sánchez-Peña , None
DOI: 10.1016/J.ENVPOL.2006.02.031
关键词:
摘要: Ambient ozone concentrations were measured with passive samplers in the framework of EU and UN/ECE Level II forest monitoring programme. Data from France, Italy, Luxembourg, Spain Switzerland are reported for 2000-2002, covering period April to September. The number plots increased 67 2000 83 2002. year 2001 experienced highest concentrations, reflecting more stable summer meteorological conditions. Average 6-month above 45 ppb this 40.3% plots, contrast less than 21% other 2 years. Gradients increasing levels observed North South altitude. Comments made on regional trends time frame higher episodes. Also, some recommendations enabling a better comparison between provided.