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• 東アジアから輸送される炭素質エアロゾルの動態把握

  2013.03

Published Papers 【 display / non-display 】

Published Papers 【 display / non-display 】

• Size-segregated sulfate on top of Mt. Fuji transported from Sakurajima volcano eruption

  Kojiro Shimada, Kei Suzuki, Shungo Kato, Shuuichi Itahashi, Shiro Hatakeyama

  ■■■     2024.05

  Type of publication: Research paper (other science council materials etc.)

  　View Summary

  Size-segregated aerosol samples were collected on Mt. Fuji with a cascade impactor during daytime and nighttime. We analyzed for their ionic and element compositions. Samples were collected from 29 July to 2 August (first period) and from 19 to 21 August 2013 (second period). Based on combined chemical components and CMAQ, in the first period, the air masses had been transported from East Asia. In the second period, the Sakurajima volcano eruption had been transported. NH4+, SO42–and elements were the major ions in 2.5 < Dp ≤ 10 during the second period. The slope of a linear regression of non-sea-salt (nss)-SO42– versus NH4+ was nearly unity, particularly during the first period. However, nss-SO42– in coarse aerosol was shifted in great excess in the second period. We have observed a rare phenomenon in which sulfate shifts to 2.5 < Dp ≤ 10. Although the formation process of (NH4)2SO4 in coarse particle is hypothesized two mechanisms, we hypothesize the third mechanism in this study. Currently, radiative forcing is being discussed for the detection of volcanic aerosols using satellites with particle sizes of 1.2 µm. If this can be clarified, it will improve the reproducibility of sulfate radiative forcing.

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• Possibility of condensation of nitric acid for cloud condensation nucleus in the summer at Mt. Fuji

  Kojiro Shimada, Yoshun Geka, Shungo Kato, Chak K. Chan, Yong Pyo Kim, Chang-Feng Ou-Yang, Neng-Huei Lina, Shiro Hatakeyama

  Atmospheric Pollution Research     2023.09 [ Peer Review Accepted ]

  Type of publication: Research paper (scientific journal)

• Possibility of condensation of nitric acid for cloud condensation nucleus in the summer at Mt. Fuji

  Kojiro Shimada, Yoshun Geka, Shungo Kato, Chak K. Chan, Yong Pyo Kim, Chang-Feng Ou-Yang, Neng-Huei Lina, Shiro Hatakeyama

  ■■■     2023.09 [ Peer Review Accepted ]

  Type of publication: Research paper (scientific journal)

• Evaluation of oxidative ability after photoirradiation using urban aerosols

  Yurie Gotoh, Kojiro Shimada, Shuhei Murakami, Takumi Yamawaki, Ayaka Mitsukawa, Hiroshi Okochi

      2023.07 [ Peer Review Accepted ]

  Type of publication: Research paper (scientific journal)

• Evaluation of oxidative ability after photoirradiation using urban aerosols

  Yurie Gotoh, Kojiro Shimada, Shuhei Murakami, Takumi Yamawaki, Ayaka Mitsukawa, Hiroshi Okochi

      2023.07 [ Peer Review Accepted ]

  Type of publication: Research paper (scientific journal)

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Presentations 【 display / non-display 】

• Analysis of chemical properties of organic aerosols during long-range transport from Tuoji island, China to Okinawa, Japan

  Shuzo hojo, genki oho, nikita komuta, nobuaki yoshino, eisaku ishikawa, michihiro mochida, chenran wei, qianzhe sun, ruichen zhou, syuichi itahashi, akinori takami, atsushi shimizu, kei sato, omoki nakayama, masahiro yamaguchi, keiichi sato, siro hatakeyama, kojiro Shimada

  International Symposium on plant phenology and climate feedbacks mediated by BVOCs (PCF2024)  2024.10  -  2024.10 

• Evaluation of aerosol acidity changesduring during long range transport based on simultaneous measurements at Tuoji Island, China, Nagasaki University and Cape Hedo, Japan.

  Nikita Komuta, Shuzo Hojo, Genki Oho, Nobuaki Yoshino, Michihiro Mochida, Chenran Wei, Qianzhe Sun, Syuichi Itahashi, Atsushi Shimizu, Kei Sato, Tomoki Nakayama, Masahiro Yamaguchi, Keiichi Sato, Siro Hatakeyama, Kojiro Shimada

  International Symposium on plant phenology and climate feedbacks mediated by BVOCs (PCF2024)”  2024.10  -  2024.10 

• Development of a method for measuring isoprene generated by the photodegradation of 'plant grime'.

  Genki Oho, Kojiro Shimada

  International Symposium on plant phenology and climate feedbacks mediated by BVOCs (PCF2024)  2024.10  -  2024.10 

• Development of instrument for measuring the release rate of volatile compounds generated by photodegradation of deposited PM2.5

  Kojiro Shimada

  2024 Annual Meeting of the Chinese Society for Atmospheric Environment  2024.10  -  2024.10 

• Development of a method for measuring isoprene generated by photodegradation of "plant grime"

  Kojiro Shimada

  The Hong Kong Polytechnic University  2024.09  -  2024.09 

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Academic Awards 【 display / non-display 】

Academic Awards 【 display / non-display 】

• 第2回(2023年度)日本大気化学会論文賞

  2024.05     Degradation of PAHs during long range transport based on simultaneous measurements at Tuoji Island, China, and at Fukue Island and Cape Hedo, Japan.

  Winner: Shimada K, Nohchi M Yang, Sugiyama T Miura, K, Takami A Sato, K Chen, X Kato, S, Kajii Y Meng, F, Hatakeyama S

• Oral presentation award

  2019.06     The Impact of Particulate Matters on the Formation and Chemistry of Tropical Heavy Rain Accompanied by Squall

• Oral presentation award

  2018.09    

• Oral presentation award

  2018.09    

• Oral presentation award

  2018.05    

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Grant-in-Aid for Scientific Research 【 display / non-display 】

Grant-in-Aid for Scientific Research 【 display / non-display 】

• Development of a method for measuring isoprene generated by photodegradation of "plant grime"

  Grant-in-Aid for Transformative Research Areas (A)

  Project Year: 2024.04  -  2026.03 

  Direct: 6,600,000 (YEN)  Overheads: 8,580,000 (YEN)  Total: 1,980,000 (YEN)

• Elucidation of the formation process of organic aerosols transported during long distances from Tuoji Island, China to Cape Hedo, Okinawa

  Grant-in-Aid for Scientific Research(C)

  Project Year: 2022.04  -  2025.03 

  Direct: 3,200,000 (YEN)  Overheads: 4,160,000 (YEN)  Total: 960,000 (YEN)

• Study on atmospheric environmental problems in megacities that consider the surface of paved roads as a new reaction field

  Challenging research (sprout)

  Project Year: 2018.06  -  2021.03 

  Investigator(s): Shimada Kojiro 

  Direct: 3,800,000 (YEN)  Overheads: 4,940,000 (YEN)  Total: 1,140,000 (YEN)

  　View Summary

  In megacities around the world, atmospheric environmental problems are being addressed in both developed and developing countries.Among them, even Tokyo, which is one of the most regulated megacities, has not been able to solve the atmospheric environmental problem of photochemical oxidants (ozone).In this study, we changed the "reaction field" of VOCs generated by photolysis of organic aerosol from the atmosphere to paved roads, instead of the overlooked "source" of VOCs required for ozone generation. As a result, it was discovered that the organic aerosol deposited on the paved road was photodecomposed to release VOCs. VOC emissions were high, and it was found that the current simulation model underestimated VOC emissions by more than three times.

• Analysis of the effect of nanoparticles to the respiratory system

  Grant-in-Aid for Scientific Research(C)

  Project Year: 2018.04  -  2021.03 

  Investigator(s): NISHIMURA Yoshihiro 

  Direct: 3,300,000 (YEN)  Overheads: 4,290,000 (YEN)  Total: 990,000 (YEN)

  　View Summary

  Dust emitted from factories and particulate matter (Particulate Matter; PM) contained in diesel exhaust, especially fine particles with a particle size of 2.5 μm or less (PM2.5), cause asthma when exposed to living organisms. It is known to be at risk of exacerbation of bronchitis. In recent years, the effects of nanoparticles (PM0.1) with a particle size of 0.1 μm or less on living organisms have been attracting attention, but their role in asthma exacerbation and intractability is unknown. From this study, it was suggested that PM0.1 in central Tokyo may not be involved in worsening asthma or steroid resistance, but the component analysis of PM0.1 used this time, the route of administration of PM0.1, and the dose need further study.

• A new development of stone deterioration and multidiscipinaly research on conservation in Angkor monument group

  Grant-in-Aid for Scientific Research(A)

  Project Year: 2017.04  -  2022.03 

  Direct: 31,700,000 (YEN)  Overheads: 41,210,000 (YEN)  Total: 9,510,000 (YEN)

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• 2024.12

  　

  　

• エアロゾルの化学分析

  環境省環境研研究センター 

  2017.04

  -

  2018.03

• 東アジアの越境大気汚染

  沖縄県立読谷高校 

  2013.12

  　

  　

Media Coverage 【 display / non-display 】

Media Coverage 【 display / non-display 】

• 東アジア大陸から輸送される大気微粒子の吸湿性 ～化学組成との関係を明らかに・ラボ分析に基づく実験手法の有用性も提示～  Internet

  名古屋大学  名古屋大学研究成果発信サイト  https://www.nagoya-u.ac.jp/researchinfo/result/2022/05/post-249.html  2022.5

  Author： Other 

Academic Activities 【 display / non-display 】

Academic Activities 【 display / non-display 】

• 2022.9

  　

  　

  種別： Academic society, research group, etc. 

• 2021.9

  　

  　

  種別： Academic society, research group, etc. 

• 大気環境学会 

  2019.9

  　

  　

  種別： Academic society, research group, etc. 

• 2017.11

  　

  　

  種別： Academic society, research group, etc. 

• 2014.4

  -

  2016.3

  種別： Competition, symposium, etc. 

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