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Horizontal Distributions of Aerosol Constituents and Their Mixing States in Antarctica During the Jase Traverse : Volume 14, Issue 8 (07/05/2014)

By Hara, K.

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Book Id: WPLBN0003996827
Format Type: PDF Article :
File Size: Pages 53
Reproduction Date: 2015

Title: Horizontal Distributions of Aerosol Constituents and Their Mixing States in Antarctica During the Jase Traverse : Volume 14, Issue 8 (07/05/2014)  
Author: Hara, K.
Volume: Vol. 14, Issue 8
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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Fujita, S., Nakazawa, F., Hara, K., Enomoto, H., Sugiyama, S., & Fukui, K. (2014). Horizontal Distributions of Aerosol Constituents and Their Mixing States in Antarctica During the Jase Traverse : Volume 14, Issue 8 (07/05/2014). Retrieved from

Description: Department of Earth System Science, Faculty of Science, Fukuoka University, Fukuoka, Japan. Measurements of aerosol number concentrations and direct aerosol sampling were conducted on continental Antarctica during the traverse of Japanese–Swedish joint Antarctic expedition (JASE) from 14 November 2007 until 24 January 2008. Aerosol concentrations in background conditions decreased gradually with latitude in inland regions during the traverse. The lowest aerosol number concentrations were 160 L−1 in Dp > 0.3 Μm, and 0.5 L−1 in Dp > 2 Μm. In contrast, aerosol concentrations reached 3278 L−1 in Dp > 0.3 Μm, and 215 L−1 in Dp > 2 Μm under strong wind conditions. The estimated aerosol mass concentrations were 0.04–5.7 Μg m−3. Single particle analysis of aerosol particles collected during the JASE traverse was conducted using a scanning electron microscope equipped with an energy dispersive X-ray spectrometer. Major aerosol constituents were sulfates in fine mode, and sulfate, sea-salts, modified sea-salts, and fractionated sea-salts in coarse mode. K-rich sulfates, Mg-rich sulfate, Ca-rich sulfates, and minerals were identified as minor aerosol constituents. Sea-salt particles were modified greatly with SO42− and NO3 in coarse mode, and dominantly with SO42− in fine mode during the traverse. Most sea-salt particles in the continental region were modified with sulfate and methanesulfonate near the coast, although NO3 contributed markedly to sea-salt modification in inland areas during summer. Mg-rich sea-salt particles and Mg-free sea-salt particles were present in coarse and fine modes from the coast to inland areas. These sea-salt particles might be associated with sea-salt fractionation on the snow surface of continental Antarctica.

Horizontal distributions of aerosol constituents and their mixing states in Antarctica during the JASE traverse

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