Seasonal variations of stable carbon isotopic composition and biogenic tracer compounds of water-soluble organic aerosols in a deciduous forest

Miyazaki, Y.; Fu, P. Q.; Kawamura, K.; Mizoguchi, Y.; Yamanoi, K.

Seasonal variations of stable carbon isotopic composition and biogenic tracer compounds of water-soluble organic aerosols in a deciduous forest

Miyazaki, Y.; Fu, P. Q.; Kawamura, K. et al.

Atmospheric Chemistry and Physics, 2012, 12(3), 1367-1376

Permalink : https://hdl.handle.net/2115/48192

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アクセス権	open access
URI	https://hdl.handle.net/2115/48192
タイトル	Seasonal variations of stable carbon isotopic composition and biogenic tracer compounds of water-soluble organic aerosols in a deciduous forest
著者	Miyazaki, Y. ; Fu, P. Q. ; Kawamura, K. ; Mizoguchi, Y. ; Yamanoi, K.
e-Rad_Researcher 60376655 著者名 Miyazaki, Y.
著者名 Fu, P. Q.
e-Rad_Researcher 70201449 著者名 Kawamura, K.
著者名 Mizoguchi, Y.
著者名 Yamanoi, K.
言語	英語
発行日	2012-02-03
出版者	Copernicus Publications on behalf of the European Geosciences Union (EGU)
収録物名	Atmospheric Chemistry and Physics
巻(号)	12(3)
ページ	1367-1376
抄録	To investigate the seasonal changes in biogenic water-soluble organic carbon (WSOC) aerosols in a boreal forest, aerosol samples were collected continuously in the canopy of a deciduous forest in northern Japan during 2009–2010. Stable carbon isotopic composition of WSOC (δ13CWSOC) in total suspended particulate matter (TSP) exhibited a distinct seasonal cycle, with lower values from June through September (−25.5±0.5 ‰). This cycle follows the net CO2 exchange between the forest ecosystem and the atmosphere, indicating that δ13CWSOC likely reflects the biological activity at the forest site. WSOC concentrations showed the highest values in early summer and autumn. Positive matrix factorization (PMF) analysis indicated that the factor in which biogenic secondary organic aerosols (BSOAs) dominated accounted for ~40 % of the highest concentrations of WSOC, where BSOAs mostly consisted of α-/β-pinene SOA. In addition, primary biological aerosol particles (PBAPs) made similar contributions (~57 %) to the WSOC near the forest floor in early summer. This finding indicates that the production of both primary and secondary WSOC aerosols is important during the growing season in a deciduous forest. The methanesulfonic acid (MSA) maximum was also found in early summer and had a distinct vertical gradient with larger concentrations near the forest floor. Together with the similar vertical gradients found for WSOC and δ13CWSOC as well as the α-/β-pinene SOA tracers, our results indicate that the forest floor, including ground vegetation and soil, acts as a significant source of WSOC in TSP within a forest canopy at the study site.
資源タイプ	学術雑誌論文
出版タイプ	Version of Record
権利情報	Creative Commons Attribution 3.0 Unported
EISSN	1680-7324
関連情報 (isIdenticalTo)	出版社版DOI https://doi.org/10.5194/acp-12-1367-2012