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We present results from a systematic study of vertical profiles ofaerosol number size distribution and black carbon (BC) concentrationsconducted in the Arctic, over Ny-Ålesund (Svalbard). The campaign lasted2 years (2011–2012) and resulted in 200 vertical profiles measured by meansof a tethered balloon (up to 1200 m a.g.l.) during the spring and summerseasons. In addition, chemical analysis of filter samples, aerosol sizedistribution and a full set of meteorological parameters were determined atground. The collected experimental data allowed a classification of thevertical profiles into different typologies, which allowed us to describethe seasonal phenomenology of vertical aerosol properties in the Arctic.  During spring, four main types of profiles were found and their behaviorwas related to the main aerosol and atmospheric dynamics occurring at themeasuring site. Background conditions generated homogenous profiles.Transport events caused an increase of aerosol concentration with altitude.High Arctic haze pollution trapped below thermal inversions promoted adecrease of aerosol concentration with altitude. Finally, ground-basedplumes of locally formed secondary aerosol determined profiles withdecreasing aerosol concentration located at different altitude as a functionof size.  During the summer season, the impact from shipping caused aerosol and BCpollution plumes to be constrained close to the ground, indicating that increasingshipping emissions in the Arctic could bring anthropogenic aerosol and BC inthe Arctic summer, affecting the climate

Vertical profiles of aerosol and black carbon in the Arctic: a seasonal phenomenology along 2 years (2011–2012) of field campaigns