1DLR Oberpfaffenhofen, Institut für Physik der Atmosphäre, 82230 Wessling, Germany
2Institute of Geophysics, Faculty of Physics, University of Warsaw, Pasteura 7, 02-093 Warsaw, Poland
3Alfred-Wegener Institut für Polar- und Meeresforschung (AWI), Forschungsstelle Potsdam, Telegraphenberg 43A, 14473 Potsdam, Germany
Received: 30 Jun 2009 – Discussion started: 05 Aug 2009
Abstract. 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.
Revised: 18 Dec 2009 – Accepted: 21 Jan 2010 – Published: 15 Feb 2010
Dörnbrack, A., Stachlewska, I. S., Ritter, C., and Neuber, R.: Aerosol distribution around Svalbard during intense easterly winds, Atmos. Chem. Phys., 10, 1473-1490, doi:10.5194/acp-10-1473-2010, 2010.