Articles | Volume 10, issue 4
Atmos. Chem. Phys., 10, 1473–1490, 2010

Special issue: The Arctic Study of Aerosol, Clouds and Radiation (ASTAR)

Atmos. Chem. Phys., 10, 1473–1490, 2010

  15 Feb 2010

15 Feb 2010

Aerosol distribution around Svalbard during intense easterly winds

A. Dörnbrack1, I. S. Stachlewska2,3, C. Ritter3, and R. Neuber3 A. Dörnbrack et al.
  • 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

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.

Final-revised paper