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Source identification and airborne chemical characterisation of aerosol pollution from long-range transport over Greenland during POLARCAT summer campaign 2008

Schmale, J. and Schneider, J. and Ancellet, G. and Quennehen, B. and Stohl, A. and Sodemann, H. and Burkhart, J.F. and Hamburger, T. and Arnold, S.R. and Schwarzenboeck, A. and Borrmann, S. and Law, K.S. (2011) Source identification and airborne chemical characterisation of aerosol pollution from long-range transport over Greenland during POLARCAT summer campaign 2008. Atmospheric Chemistry and Physics, 11, pp. 10097-10123. DOI: 10.5194/acp-11-10097-2011.

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Official URL: http://www.atmos-chem-phys.net/11/10097/2011/

Abstract

We deployed an aerosol mass spectrometer during the POLARCAT (Polar Study using Aircraft, Remote Sensing, Surface Measurements and Models, of Climate, Chemistry, Aerosols, and Transport) summer campaign in Greenland in June/July 2008 on the research aircraft ATR-42. Online size resolved chemical composition data of submicron aerosol were collected up to 7.6 km altitude in the region 60 to 71� N and 40 to 60�W. Biomass burning (BB) and fossil fuel combustion (FF) plumes originating from North America, Asia, Siberia and Europe were sampled. Transport pathways of detected plumes included advection below 700 hPa, air mass uplifting in warm conveyor belts, and high altitude transport in the upper troposphere. By means of the Lagrangian particle dispersion model FLEXPART, trace gas analysis of O3 and CO, particle size distributions and aerosol chemical composition 48 pollution events were identified and classified into five chemically distinct categories. Aerosol from North American BB consisted of 22% particulate sulphate, while with increasing anthropogenic and Asian influence aerosol in Asian FF dominated plumes was composed of up to 37% sulphate category mean value. Overall, it was found that the organic matter fraction was larger (85 %) in pollution plumes than for background conditions (71 %). Despite different source regions and emission types the particle oxygen to carbon ratio of all plume classes was around 1 indicating low-volatility highly oxygenated aerosol. The volume size distribution of out-of-plume aerosol showed markedly smaller modes than all other distributions with two Aitken mode diameters of 24 and 43 nm and a geometric standard deviation �g of 1.12 and 1.22, respectively, while another very broad mode was found at 490 nm (�g =2.35). Nearly pure BB particles from North America exhibited an Aitken mode at 66 nm (�g =1.46) and an accumulation mode diameter of 392 nm (�g =1.76). An aerosol lifetime, including all processes from emission to detection, in the range between 7 and 11 days was derived for North American emissions.

Document Type:Article
Title:Source identification and airborne chemical characterisation of aerosol pollution from long-range transport over Greenland during POLARCAT summer campaign 2008
Authors:
AuthorsInstitution or Email of Authors
Schmale, J.MPI Mainz
Schneider, J.MPI Mainz
Ancellet, G.Univ. Versailles St-Quentin, Paris, F
Quennehen, B.Univ. Blaise Pascal, Aubière, F
Stohl, A.NILU, Kjeller, N
Sodemann, H.NILU, Kjeller, N
Burkhart, J.F.NILU, Kjeller, N
Hamburger, T.DLR
Arnold, S.R.Univ. of Leeds, UK
Schwarzenboeck, A.Univ. Blaise Pascal, Aubière, F
Borrmann, S.MPI Mainz
Law, K.S.Univ. Versailles St-Quentin, Paris, F
Date:2011
Journal or Publication Title:Atmospheric Chemistry and Physics
Refereed publication:Yes
In Open Access:Yes
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:11
DOI:10.5194/acp-11-10097-2011
Page Range:pp. 10097-10123
Status:Published
Keywords:aerosol pollution
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Earth Observation
DLR - Research area:Raumfahrt
DLR - Program:R EO - Erdbeobachtung
DLR - Research theme (Project):R - Vorhaben Atmosphären- und Klimaforschung
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Atmospheric Physics > Atmospheric Trace Species
Deposited By: Jana Freund
Deposited On:19 Oct 2011 16:09
Last Modified:12 Dec 2013 21:23

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