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Atmospheric Chemistry and Physics An interactive open-access journal of the European Geosciences Union
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Volume 18, issue 1 | Copyright
Atmos. Chem. Phys., 18, 81-101, 2018
https://doi.org/10.5194/acp-18-81-2018
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 3.0 License.

Research article 04 Jan 2018

Research article | 04 Jan 2018

Thirteen years of observations on primary sugars and sugar alcohols over remote Chichijima Island in the western North Pacific

Santosh Kumar Verma1,2, Kimitaka Kawamura1,a, Jing Chen1,b, and Pingqing Fu1,c Santosh Kumar Verma et al.
  • 1Institute of Low Temperature Science, Hokkaido University, N19, W8, Kita-ku, Sapporo 060-0819, Japan
  • 2State Forensic Science Laboratory, Home (Police) Department, Government of Chhattisgarh, Raipur 49001, India
  • anow at: Chubu Institute for Advanced Studies, Chubu University, Kasugai 487-8501, Japan
  • bnow at: School of Environmental Science and Engineering, Tianjin University, Tianjin 300072, China
  • cnow at: Institute of Surface-Earth System Science, Tianjin University, Tianjin 300072, China

Abstract. In order to understand the atmospheric transport of bioaerosols, we conducted long-term observations of primary sugars and sugar alcohols over remote Chichijima Island in the western North Pacific from 2001 to 2013. Our results showed that concentrations of total sugar compounds for 13 years ranged from 1.2 to 310ngm−3 (average of 46±49ngm−3). We found that atmospheric circulations significantly affect the seasonal variations of bioaerosol distributions over the western North Pacific. The primary sugars (glucose and fructose) maximized in summer, possibly due to an increased emission of the vegetation products from local vascular plants in Chichijima. We also found higher concentrations of sugar components (arabitol, mannitol, and trehalose) in more recent years during summer and autumn, suggesting an enhanced emission of fungal and microbial species over the island. Sucrose peaked in late winter to early spring, indicating a springtime pollen contribution by long-range atmospheric transport, while elevated concentrations of sucrose in early summer could be explained by long-range transport of soil dust from Southeast Asia to Chichijima. Sucrose and trehalose were found to present increasing trends from 2001 to 2013, while total sugar components did not show any clear trends during the 13-year period. Positive matrix factorization analyses suggested the locally emitted sugar compounds as well as long-range-transported airborne pollen grains, microbes, and fungal spores are the major contributors to total sugar compounds in the Chichijima aerosols. Backward air mass trajectories support the atmospheric transport of continental aerosols from the Asian continent during winter and spring over Chichijima.

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East Asia has experienced rapid economic development in the last several decades, of which activities emit bioaerosols. The atmospheric particles are transported to downwind regions in the Pacific. To understand the atmospheric transport of bioaerosols, we conducted long-term observations of sugar components over Chichijima Island from 2001 to 2013. We found that atmospheric circulations significantly affect the seasonal variation of bioaerosol distributions over the western North Pacific.
East Asia has experienced rapid economic development in the last several decades, of which...
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