Dear Colleagues,

Typically, the Arctic environment (including atmosphere) has been regarded as pristine, which is related to its remoteness and relatively low anthropogenic impact. However, the situation is changing due to a number of stressors, with climate-change-related unusual aerosol events (including biomass burning), among many others. We have recently observed that beside the persistent and accelerated natural and anthropogenic processes (both local and regional) which modify the Arctic atmosphere, the extreme aerosol events are becoming a very serious large-scale source of adverse impact on the Arctic atmosphere. These aerosols and other pollutants are commonly transported from lower latitudes into the Arctic where they remain in the atmosphere, change their properties, and are deposited to the surface.

The physical, optical, and chemical properties of atmospheric aerosols are difficult to describe since they are of different origins (sources outside the Arctic or local) and also relate to meteorological conditions, which facilitate or prevent aerosol transport from distant sources or inhibit particle formation from local sources. Therefore, an increasing number of various aerosol events both local and regional (also extreme events) is an emerging issue, which we must now thoroughly study.

We invite research papers, inter- and transdisciplinary as well as review papers, contributing to the description of the Arctic climate issues related to aerosol studies (including extreme aerosol events), and which refer to the themes of the call.

Dr. Tymon P. Zielinski
Dr. Luca Ferrero
Dr. Paulina Pakszys
Dr. Christoph Ritter
Guest Editors

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• Aerosol pathways/sources into the Arctic
• Aerosol chemical composition
• Transformation of aerosol optical properties
• Arctic haze and biomass burning effects
• Long-range transport events
• Aerosol optical properties
• Radiative balance/radiative forcing
• Remote sensing
• Field and theoretical studies
• AERONET (MAN)
• Sustainable studies in the Arctic