Atmospheric Chemistry and Physics www.atmos-chem-phys.net 1680-7316 1680-7324 6 10 2006 10.5194/acp-6-2865-2006 http://www.atmos-chem-phys.net/6/2865/2006/ http://www.atmos-chem-phys.net/6/2865/2006/acp-6-2865-2006.html http://www.atmos-chem-phys.net/6/2865/2006/acp-6-2865-2006.pdf 2865 2886 2006-07-12 One year of ²²²Rn concentration in the atmospheric surface layer S. Galmarini stefano.galmarini@jrc.it European Commission – DG Joint Research Centre, Institute for Environment and Sustainability, Ispra, Italy A one-year time series of ²²²Rn measured in a rural area in the North of Italy in 1997 is analyzed. The scope of the investigation is to better understand the behavior of this common atmospheric tracer in relation to the meteorological conditions at the release site. Wavelet analysis is used as one of the investigation tools of the time series. The measurements and scalograms of ²²²Rn are compared to those of wind-speed, pressure, relative humidity, temperature and NO_x. 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