Vertical profiles of aerosol and black carbon in the Arctic: a seasonal phenomenology along 2 years (2011–2012) of field campaigns
- 1Department of Earth and Environmental Sciences, University of Milano-Bicocca, Piazza della Scienza 1, 20126 Milan, Italy
- 2Department of Chemistry, Biology and Biotechnology, University of Perugia, 06123 Perugia, Italy
- 3Institute of Atmospheric Sciences and Climate, CNR-ISAC, via Gobetti 101, 40129 Bologna, Italy
- 4European Commission, Joint Research Centre (JRC), Institute for Environment & Sustainability, via E. Fermi, 21027 Ispra, Italy
- 5University of Florence, Via della Lastruccia 3, 50019 Florence, Italy
- 6University of Applied Sciences and Arts Northwestern Switzerland, Windisch, Switzerland
- 7Aerosol d.o.o., Kamniska 41, 1000 Ljubljana, Slovenia
- 8Condensed Matter Physics Department, Jozef Stefan Institute, Jamova 39, 1000 Ljubljana, Slovenia
- 9Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Telegraphenberg 43A, 14473 Potsdam, Germany
Abstract. We present results from a systematic study of vertical profiles of aerosol number size distribution and black carbon (BC) concentrations conducted in the Arctic, over Ny-Ålesund (Svalbard). The campaign lasted 2 years (2011–2012) and resulted in 200 vertical profiles measured by means of a tethered balloon (up to 1200 m a.g.l.) during the spring and summer seasons. In addition, chemical analysis of filter samples, aerosol size distribution and a full set of meteorological parameters were determined at ground. The collected experimental data allowed a classification of the vertical profiles into different typologies, which allowed us to describe the seasonal phenomenology of vertical aerosol properties in the Arctic.
During spring, four main types of profiles were found and their behavior was related to the main aerosol and atmospheric dynamics occurring at the measuring 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 a decrease of aerosol concentration with altitude. Finally, ground-based plumes of locally formed secondary aerosol determined profiles with decreasing aerosol concentration located at different altitude as a function of size.
During the summer season, the impact from shipping caused aerosol and BC pollution plumes to be constrained close to the ground, indicating that increasing shipping emissions in the Arctic could bring anthropogenic aerosol and BC in the Arctic summer, affecting the climate.