Chemical composition of fine aerosol measured by AMS at Fukue Island, Japan during APEX period

Takami, Akinori; Miyoshi, Takao; Shimono, Atsushi; Hatakeyama, Shiro

doi:10.1016/j.atmosenv.2005.04.038

Cited by 113 publications

(97 citation statements)

References 23 publications

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“…The observations were made at the Observatory of the Atmospheric Environment on Fukue Island (32.75°N, 128.68°E) (Takami et al, 2005;Kanaya et al, 2013) from May 1 to June 5, 2009. The island is located between the main Japanese islands and the Asian continent ( Fig.…”

Section: Observations and Model Simulation Inputsmentioning

confidence: 99%

Diagnosis of Photochemical Ozone Production Rates and Limiting Factors in Continental Outflow Air Masses Reaching Fukue Island, Japan: Ozone-Control Implications

Kanaya

Tanimoto

Yokouchi

et al. 2016

Aerosol Air Qual. Res.

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Asian continental outflow air masses reach western Japan in the springtime, carrying high levels of ozone produced over the Asian continent, and facilitating in-situ production. In this study, in-situ production was highlighted; the rate and limiting factors of net ozone production were diagnosed at Fukue Island, a remote island west of Japan, on 17 days during May-June 2009, when the continental outflow air mass arrived, using an observation-based modeling approach. The average ozone production was estimated to be 6.8 ppb per day. Information on the chemical status of the arriving air mass is important, because it affects how further ozone production in the air mass occurs after precursor addition from Japanese domestic emissions. The main limiting factor of ozone production for such air masses was usually nitrogen oxides (NO x ), suggesting that domestic NO x emission control is important in reducing further ozone production. Volatile organic compounds (VOCs) also increased the ozone production rate, and occasionally (14% of time) became the dominant controlling factor. This analysis implies that the VOC reduction legislation recently enacted by the Japanese government should be effective. VOC-limited conditions occurred particularly when the air mass traveled within 6-8 h, via the Korean Peninsula. The uncertainty in the radical chemistry mechanism governing ozone production had a non-negligible impact, but the main conclusion relevant to policy was not altered. When chain termination was augmented by HO 2 + NO/NO 2 reactions in the presence of H 2 O and by heterogeneous loss of HO 2 on aerosol particle surfaces, as recently verified or hypothesized, the daily ozone production rate decreased by up to 24%, and the fraction of hours when the VOC-limited condition occurred varied from 14% to 13-26%.

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Section: Observations and Model Simulation Inputsmentioning

confidence: 99%

Diagnosis of Photochemical Ozone Production Rates and Limiting Factors in Continental Outflow Air Masses Reaching Fukue Island, Japan: Ozone-Control Implications

Kanaya

Tanimoto

Yokouchi

et al. 2016

Aerosol Air Qual. Res.

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“…The aerosol mass spectrometry technique has been used as a powerful tool to determine the chemical constituents of sub-micrometer atmospheric aerosols in real time (Suess and Prather 1999;Jayne et al 2000;McMurry 2000;Noble and Prather 2000;Allan et al 2003;Jimenez et al 2003;Middlebrook et al 2003;Dall'Osto et al 2004;Drewnick et al 2004;Topping et al 2004;Takami et al 2005;Takegawa et al 2005;Nash et al 2006;Canagaratna et al 2007;DeCarlo et al 2007;Liu et al 2007;Kamphus et al 2008). One of the popular methods of aerosol mass spectrometry instruments is to combine thermal vaporization and electron impact ionization (EI) with subsequent mass analysis of the produced ions by mass spectrometer.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Particle Bounce in Various Collection Substrates to be Used as Vaporizer in Aerosol Mass Spectrometer

Kang

Cho

Kwak

et al. 2015

Aerosol Science and Technology

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The determination of the collection efficiency (CE) of particles during transport, vaporization, and ionization in the aerosol mass spectrometer (AMS), which uses vaporizer to evaporate non-refractory particles with subsequent ionization, is important for accurately quantifying the concentrations of chemical constituents. Particle bounce in the vaporizer can be considered as one of the most important parameters influencing the CE of particles. Substrates with various shapes (flat, cylindrical, reverse-conical, cup, trapezoidal, and reverse-T), materials (stainless steel, copper, tungsten, and molybdenum), pores with average sizes of 0.2, 1, 5, 20, and 100 mm, and mesh with a size of 79 mm, which can be a possible candidate for the vaporizer in the AMS, were constructed. Bounce fractions of sub-micrometer particles (polystyrene latex, oleic acid, and dioctyl phthalate) were determined using the differential mobility analyzer (DMA)-impactor technique under a constant impact velocity. For the porous substrate, the particle bounce fraction significantly decreased with increasing pore size and porosity, but there was an upper limit for the pore size above which the particle bounce fraction no longer decreased significantly (i.e., the rebounded particles successfully escaped from the pores). The mesh substrate also had a lower particle bounce fraction than the flat substrate. Among the tested materials, the copper substrate having the lowest hardness and elasticity had the lowest particle bounce fraction. In addition, the reverse-T shape substrate having more available surfaces for particle entrapment led to the reduction of particle bounce fraction. In terms of phase, the liquid particles had lower particle bounce fractions than the solid particles. Our results suggest that the vaporizer in the AMS should provide traps for multiple collisions of the rebounding particles with an appropriate porosity or mesh and should be made of lowhardness materials to minimize particle bounce.

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“…On the 16th and 18th, the concentrations of SO 4 2-were highest. One possibility for the high concentration of SO 4 2-in PM 2.5 is that the PM was transported from the Asian continent (Takami et al, 2005(Takami et al, , 2007Kaneyasu et al, 2010). Another possibility for the high concentration of SO 4 2-in PM 2.5 is the effect of volcanic activity (Katsuno et al, 2002).…”

Section: Factors Leading To High Pm 25 Concentrationsmentioning

confidence: 99%

“…Kaneyasu et al (2010) investigated the air mass including high concentrations of PM 2.5 originating on the Asian continent through observation at Fukuoka and Fukue Island, Japan, and Jeju Island, Korea (Kaneyasu et al, 2010). Takami et al (2005) analyzed the chemical composition of ambient aerosols using an aerosol mass spectrometer (AMS) at Fukue Island, and they investigated whether PM, including sulfates, originated from the Asian continent by long-range transport and whether the organic components in PM were well oxygenated (Takami et al, 2005(Takami et al, , 2007. In addition, when individual particle analysis was performed with a time-of-flight secondary ion mass spectrometer, it was shown that black carbon (BC)-containing particles were relatively more abundant on Fukue Island than in Tokyo (Takami et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

“…This pollution was suspected to be partly due to air pollution traveling from the Asian continent owing to the seasonal monsoons. To investigate the origin of air pollution in the Kyushu region, many studies have been performed using various methods (Takami et al, 2005(Takami et al, , 2007Kaneyasu et al, 2010;Takami et al, 2013). Kaneyasu et al (2010) investigated the air mass including high concentrations of PM 2.5 originating on the Asian continent through observation at Fukuoka and Fukue Island, Japan, and Jeju Island, Korea (Kaneyasu et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

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Continuous Observation of the Mass and Chemical Composition of PM2.5 using an Automatic Analyzer in Kumamoto, Japan

Misawa

Yoshino

Takami

et al. 2017

Aerosol Air Qual. Res.

Self Cite

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Due to economic growth in China, emissions of gaseous components from factories and automobiles have been increasing, which has resulted in severe air pollution. During the winter and spring seasons, Japan, which is on the leeward side of the Asian continent, is on the receiving end of this increasingly problematic transboundary air pollution. In this study, the mass concentration and chemical components of the particulate PM 2.5 were continuously observed using an automatic analyzer at Kumamoto on the west coast of Japan from October 2014 to March 2015. A greater number of high PM 2.5 days were observed in winter than in autumn. This seasonal change in concentrations was believed to be due to transboundary air pollution traveling from the Asian continent due to seasonal monsoons. The analysis of the chemical composition of PM 2.5 supported this idea. The factors leading to high PM 2.5 concentrations were investigated and categorized into transboundary air pollution, local air pollution, and volcanic activity based on the analysis of sulfate (SO 4 2-) and sulfur dioxide (SO 2 ) concentrations and model simulations. The average concentration of chemical components showed that local air pollution also influenced air quality in Kumamoto.

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Chemical composition of fine aerosol measured by AMS at Fukue Island, Japan during APEX period

Cited by 113 publications

References 23 publications

Diagnosis of Photochemical Ozone Production Rates and Limiting Factors in Continental Outflow Air Masses Reaching Fukue Island, Japan: Ozone-Control Implications

Diagnosis of Photochemical Ozone Production Rates and Limiting Factors in Continental Outflow Air Masses Reaching Fukue Island, Japan: Ozone-Control Implications

Evaluation of Particle Bounce in Various Collection Substrates to be Used as Vaporizer in Aerosol Mass Spectrometer

Continuous Observation of the Mass and Chemical Composition of PM2.5 using an Automatic Analyzer in Kumamoto, Japan

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