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Tracing atmospheric transport of soil microorganisms and higher plant waxes in the East Asian outflow to the North Pacific Rim by using hydroxy fatty acids: Year-round observations at Gosan, Jeju Island

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Title: Tracing atmospheric transport of soil microorganisms and higher plant waxes in the East Asian outflow to the North Pacific Rim by using hydroxy fatty acids: Year-round observations at Gosan, Jeju Island
Authors: Tyagi, Poonam Browse this author
Kawamura, Kimitaka Browse this author →KAKEN DB
Kariya, Tadashi Browse this author
Bikkina, Srinivas Browse this author
Fu, Pingqing Browse this author
Lee, Meehye Browse this author
Keywords: Hydroxy fatty acids
Gram-negative bacteria
Seasonal variation
long-range atmospheric transport
East Asian outflow
Issue Date: 16-Apr-2017
Publisher: American Geophysical Union
Journal Title: Journal of geophysical research atmospheres
Volume: 122
Issue: 7
Start Page: 4112
End Page: 4131
Publisher DOI: 10.1002/2016JD025496
Abstract: Atmospheric transport of soil microorganisms and higher plant waxes in East Asia significantly influences the aerosol composition over the North Pacific. This study investigates the year-round atmospheric abundances of hydroxy fatty acids (FAs), tracers of soil microorganisms (-isomers), and plant waxes (- and -isomers), in total suspended particles collected at Gosan, Jeju Island, during April 2001 to March 2002. These hydroxy FAs showed a pronounced seasonality, higher concentrations in winter/spring and lower concentrations in summer/autumn, which are consistent with other tracers of soil microbes (trehalose), resuspended dust (nss-Ca2+), and stable carbon isotopic composition (C-13) of total carbon. The molecular distributions of -hydroxy FAs (predominance of C-12 and C-16 in winter/spring and summer/autumn, respectively) are consistent with those from a remote island (Chichijima) in the North Pacific and Asian dust standards (CJ-1 and CJ-2). This observation together with back trajectories over Gosan reveal that desert sources in China during winter and arid regions of Mongolia and Russian Far East during spring are the major contributors of soil microbes over the North Pacific. Predominance of -isomers (83%) over -hydroxy FAs (16%) revealed a major contribution of terrestrial lipids from higher plant waxes over soil microbes in the East Asian outflow.
Rights: Copyright 2017 American Geophysical Union.
Type: article
URI: http://hdl.handle.net/2115/68835
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: 河村 公隆

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