Aerosol distribution around Svalbard during intense easterly winds

• Published in: Atmospheric Chemistry and Physics
• Main Authors: Dörnbrack, A., Stachlewska, I. S., Ritter, C., Neuber, R.
• Format: Text
• Language: English
• Published: 2018
• Subjects: Adventdalen; Arctic; Svalbard; Isfjord*; Isfjorden
• Online Access: https://doi.org/10.5194/acp-10-1473-2010; https://www.atmos-chem-phys.net/10/1473/2010/

This paper reports on backscatter and depolarization measurements by an airborne lidar in the Arctic during the ASTAR 2004 campaign. A unique weather situation facilitated the observation of the aerosol concentration under strongly forced atmospheric conditions. The vigorous easterly winds distorted the flow past Svalbard in such a way that mesoscale features were visible in the remote-sensing observations: The formation of a well-mixed aerosol layer inside the Adventdalen and the subsequent thinning of the aerosol plume were observed over the Isfjorden. Additionally, mobilization of sea salt aerosols due to a coastal low-level jet at the northern tip of Svalbard resulted in a sloped boundary layer toward north. Mesoscale numerical modelling was applied to identify the sources of the aerosol particles and to explain the observed patterns.