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The rates of sea salt sulfatization in the atmosphere and surface snow of inland Antarctica

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Title: The rates of sea salt sulfatization in the atmosphere and surface snow of inland Antarctica
Authors: Iizuka, Yoshinori Browse this author →KAKEN DB
Tsuchimoto, Akira Browse this author
Hoshina, Yu Browse this author
Sakurai, Toshimitsu Browse this author
Hansson, Margareta Browse this author
Karlin, Torbjörn Browse this author
Fujita, Koji Browse this author
Nakazawa, Fumio Browse this author
Motoyama, Hideaki Browse this author
Fujita, Shuji Browse this author
Issue Date: 28-Feb-2012
Publisher: American Geophysical Union
Journal Title: Journal of Geophysical Research, Atmospheres
Volume: 117
Start Page: D04308
Publisher DOI: 10.1029/2011JD016378
Abstract: Most of the aerosol particles present in the surface snow and ice of inland Antarctica come from primary sea salt (sodium chloride) and marine biological activity (methansulfonic and sulfuric acids). Melted water from surface snow, firn, and Holocene ice contains mainly sodium, chloride, and sulfate ions. Although it is well known that sea salt aerosols react rapidly with sulfuric acid, a process known as sulfatization, it is not known when this process takes place. In this research we undertake to measure the proportion of sea salt aerosols that undergo sulfatization in the atmosphere and surface snow, as opposed to deeper ice, in order to understand the suitability of sea salt aerosols as a proxy for past climates in deep ice cores. We directly measure the sulfatization rates in recently fallen snow (0-4 m in depth) collected at the Dome Fuji station, using X-ray dispersion spectroscopy to determine the constituent elements of soluble particles and computing the molar ratios of sodium chloride and sodium sulfate. We estimate that about 90% of the initial sea salt aerosols sulfatize as they are taken up by precipitation over Dome Fuji or in the snowpack within one year after being deposited on the ice sheet.
Rights: Copyright 2012 by the American Geophysical Union.
Type: article
Appears in Collections:低温科学研究所 (Institute of Low Temperature Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 飯塚 芳徳

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