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Potential Source Regions and Processes of Aerosol in the Summer Arctic : Volume 15, Issue 11 (15/06/2015)

By Heintzenberg, J.

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Book Id: WPLBN0003984888
Format Type: PDF Article :
File Size: Pages 16
Reproduction Date: 2015

Title: Potential Source Regions and Processes of Aerosol in the Summer Arctic : Volume 15, Issue 11 (15/06/2015)  
Author: Heintzenberg, J.
Volume: Vol. 15, Issue 11
Language: English
Subject: Science, Atmospheric, Chemistry
Collections: Periodicals: Journal and Magazine Collection, Copernicus GmbH
Publication Date:
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications


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Leck, C., Tunved, P., & Heintzenberg, J. (2015). Potential Source Regions and Processes of Aerosol in the Summer Arctic : Volume 15, Issue 11 (15/06/2015). Retrieved from

Description: Leibniz Institute for Tropospheric Research, Permoser Str. 15, 04318 Leipzig, Germany. Sub-micrometer particle size distributions measured during four summer cruises of the Swedish icebreaker Oden 1991, 1996, 2001, and 2008 were combined with dimethyl sulfide gas data, back trajectories, and daily maps of pack ice cover in order to investigate source areas and aerosol formation processes of the boundary layer aerosol in the central Arctic. With a clustering algorithm, potential aerosol source areas were explored. Clustering of particle size distributions together with back trajectories delineated five potential source regions and three different aerosol types that covered most of the Arctic Basin: marine, newly formed and aged particles over the pack ice. Most of the pack ice area with < 15% of open water under the trajectories exhibited the aged aerosol type with only one major mode around 40 nm. For newly formed particles to occur, two conditions had to be fulfilled over the pack ice: the air had spent 10 days while traveling over ever more contiguous ice and had traveled over less than 30% open water during the last 5 days. Additionally, the air had experienced more open water (at least twice as much as in the cases of aged aerosol) during the last 4 days before arrival in heavy ice conditions at Oden. Thus we hypothesize that these two conditions were essential factors for the formation of ultrafine particles over the central Arctic pack ice. In a comparison the Oden data with summer size distribution data from Alert, Nunavut, and Mt. Zeppelin, Spitsbergen, we confirmed the Oden findings with respect to particle sources over the central Arctic. Future more frequent broken-ice or open water patches in summer will spur biological activity in surface water promoting the formation of biological particles. Thereby low clouds and fogs and subsequently the surface energy balance and ice melt may be affected.

Potential source regions and processes of aerosol in the summer Arctic

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