Automated identification of local contamination in remote atmospheric composition time series

Extreme Environments Research Laboratory, École Polytechnique fédérale de Lausanne, Switzerland Institute for Atmospheric and Earth System Research, INAR/Physics, FI-00014 University of Helsinki, Finland Climate & Atmosphere Research Centre (CARE-C), The Cyprus Institute, P.O. Box 27456, Nicosia, 1645, Cyprus 4 Atmospheric Sciences, Department of Environmental Sciences, University of Basel, Switzerland Center for Aerosol Science and Engineering, Department of Energy, Environmental and Chemical Engineering, Washington 10