Mori, Tatsuhiro

写真a

Affiliation

Faculty of Science and Technology, Department of Applied Chemistry (Yagami)

Position

Assistant Professor (Non-tenured)/Research Associate (Non-tenured)/Instructor (Non-tenured)

External Links
Page Top ▲

Career 【 Display / hide 】

  • 2016.04
    -
    2017.03

    The University of Tokyo, Graduate School of Science, 日本学術振興会 特別研究員(DC2)

  • 2017.04
    -
    2021.03

    Tokyo University of Science, Physics, Faculty of Science, Division 1, 嘱託助教

  • 2021.04
    -
    2022.03

    The University of Tokyo, Department of Earth and Planetary Science, 特任助教

  • 2021.04
    -
    Present

    Tokyo University of Science, 客員研究員

  • 2022.04
    -
    Present

    Keio University, Faculty of Science and Technology Department of Applied Chemistry, Assistant professor

Page Top ▲
 

Research Areas 【 Display / hide 】

  • Natural Science / Atmospheric and hydrospheric sciences

Page Top ▲

Research Keywords 【 Display / hide 】

  • Aerosol, charging states, East Asia, Arctic, Health effect

Page Top ▲
 

Papers 【 Display / hide 】

  • High-resolution analyses of concentrations and sizes of refractory black carbon particles deposited in northwestern Greenland over the past 350 years - Part 2: Seasonal and temporal trends in refractory black carbon originated from fossil fuel combustion and biomass burning

    Goto-Azuma K., Ogawa-Tsukagawa Y., Fukuda K., Fujita K., Hirabayashi M., Dallmayr R., Ogata J., Moteki N., Mori T., Ohata S., Kondo Y., Koike M., Matoba S., Kadota M., Tsushima A., Nagatsuka N., Aoki T.

    Atmospheric Chemistry and Physics 25 ( 1 ) 657 - 683 2025.01

    Research paper (scientific journal), Joint Work, Lead author, Corresponding author, Accepted,  ISSN  16807316

    　View Summary

    The roles and impacts of refractory black carbon (rBC), an important aerosol species affecting Earth's radiation budget, are not well understood owing to a lack of accurate long-term observations. To study the temporal changes in rBC since the pre-industrial period, we analyzed rBC in an ice core drilled in northwestern Greenland. Using an improved technique for rBC measurement and a continuous flow analysis (CFA) system, we obtained accurate and high-temporal-resolution records of rBC particle size and mass/number concentrations for the past 350 years. Number and mass concentrations, which both started to increase in the 1870s associated with the inflow of anthropogenically derived rBC, reached their maxima in the 1910s-1920s and then subsequently decreased. Backward-trajectory analyses suggest that North America was likely the dominant source region of the anthropogenic rBC in the ice core. The increase in anthropogenic rBC shifted the annual concentration peaks of rBC from summer to winter-early spring. After rBC concentrations diminished to pre-industrial levels, the annual peak concentration of rBC returned to the summer. We found that anthropogenic rBC particles were larger than biomass burning rBC particles. By separating the rBC in winter and summer, we reconstructed the temporal variations in rBC that originated from biomass burning, including the period with large anthropogenic input. The rBC that originated from biomass burning showed no trend in increase until the early 2000s. Finally, possible albedo reductions due to rBC are discussed. Our new data provide key information for validating aerosol and climate models, thereby supporting improved projections of future climate and environment.

  • Microbiostatic effect of indoor air quality management with low-concentration gaseous chlorine dioxide on fungal growth

    Mitani R., Yamanaka H., Ishigaki Y., Nakayama D., Sakamoto M., Watanabe C., Mori T., Okuda T.

    Asian Journal of Atmospheric Environment 18 ( 1 )  2024.12

    Research paper (scientific journal), Joint Work, Lead author, Corresponding author, Accepted,  ISSN  19766912

    　View Summary

    Biological contamination of fresh produce by fungi in storage is becoming a serious problem. Gaseous chlorine dioxide (ClO2) has been used to prevent fungal growth on fresh produce; however, the specific effects of gaseous ClO2 at concentrations low enough to be safe for the human body on fungal growth remain unknown. Therefore, in this study, we aimed to investigate the effect of low-concentration gaseous ClO2 on fungal growth in sweet potatoes over 1 month. Here, a mechanochemical reaction involving the collision of two types of powders was used to produce low concentrations of gaseous ClO2. The experiment was conducted in a container and chlorine dioxide gas was diffused by a circulator to verify its microbiostatic effect in a large space. A clear microbiostatic effect was observed in potatoes without skin when exposed to low-concentration ClO2 for 3 days. Notably, low concentrations (< 1.0 ppm) of ClO2 reduced Rhizopus stolonifer growth in sweet potatoes with skin over 1 month. Therefore, low concentrations of gaseous ClO2 are sufficient to inhibit fungal growth via gas diffusion.

  • Technical note: High-resolution analyses of concentrations and sizes of refractory black carbon particles deposited in northwestern Greenland over the past 350 years – Part 1: Continuous flow analysis of the SIGMA-D ice core using the wide-range Single-Particle Soot Photometer and a high-efficiency nebulizer

    Kumiko Goto-Azuma, Remi Dallmayr, Yoshimi Ogawa-Tsukagawa, Nobuhiro Moteki, Tatsuhiro Mori, Sho Ohata, Yutaka Kondo, Makoto Koike, Motohiro Hirabayashi, Jun Ogata, Kyotaro Kitamura, Kenji Kawamura, Koji Fujita, Sumito Matoba, Naoko Nagatsuka, Akane Tsushima, Kaori Fukuda, Teruo Aoki

    Atmospheric Chemistry and Physics (Copernicus GmbH)  24 ( 22 ) 12985 - 13000 2024.11

    Research paper (scientific journal), Joint Work, Lead author, Corresponding author, Accepted,  ISSN  16807316

    　View Summary

    Abstract. Ice cores can provide long-term records of refractory black carbon (rBC), an important aerosol species closely linked to the climate and environment. However, previous studies of ice cores only analyzed rBC particles with a diameter of &lt; 500 nm, which could have led to an underestimation of rBC mass concentrations. Information on the size distribution of rBC particles is very limited, and there are no Arctic ice core records of the temporal variation in rBC size distribution. In this study, we applied a recently developed improved technique to analyze the rBC concentration in an ice core drilled at the SIGMA-D site in northwestern Greenland. The improved technique, which uses the modified Single-Particle Soot Photometer (SP2) and a high-efficiency nebulizer, widens the measurable range of rBC particle size. For high-resolution continuous analyses of ice cores, we developed a continuous flow analysis (CFA) system. Coupling of the improved rBC measurement technique with the CFA system allows accurate high-resolution measurements of the size distribution and concentration of rBC particles with a diameter between 70 nm and 4 µm, with minimal particle losses. Using this technique, we reconstructed the size distributions and the number and mass concentrations of rBC particles during the past 350 years. On the basis of the size distributions, we assessed the underestimation of rBC mass concentrations measured using the conventional SP2s. For the period 2003–2013, the underestimation of the average mass concentration would have been 12 %–31 % for the SIGMA-D core.

  • Source contribution of black carbon aerosol during 2020–2022 at an urban site in Indo-Gangetic Plain

    Arpit Malik, Shankar G. Aggarwal, Yutaka Kondo, Baban Kumar, Prashant Patel, Puna Ram Sinha, Naga Oshima, Sho Ohata, Tatsuhiro Mori, Makoto Koike, Khem Singh, Daya Soni, Akinori Takami

    Science of The Total Environment (Elsevier BV)  934   173039 - 173039 2024.07

    Research paper (scientific journal), Joint Work, Lead author, Corresponding author, Accepted,  ISSN  00489697

    　View Summary

    The extensive emissions of black carbon (BC) from the Indo-Gangetic Plain (IGP) region of India have been well recognized. Particularly, biomass emissions from month-specific crop-residue burning (April, May, October, November) and heating activities (December–February) are considered substantial contributors to BC emissions in the IGP. However, their precise contribution to ambient BC aerosol has not been quantified yet and remains an issue of debate. Therefore, this study aims to fill this gap by quantifying the contribution of these month-specific biomass emissions to ambient BC at an urban site in IGP. This study presents the analysis of BC mass concentrations (MBC) measured for 3 years (2020−2022) in Delhi using an optical photometer i.e., continuous soot monitoring system (COSMOS). A statistical analysis of monthly mean MBC and factors affecting the MBC (ventilation coefficients, air mass back trajectories, fire counts) is performed to derive month-wise contribution due to background concentration, conventional emission, regional transport, crop-residue burning, and heating activities. The yearly mean MBC (5.3 ± 4.7, 5.6 ± 5.0, and 5.3 ± 3.5 μg m−3 during 2020, 2021, and 2022, respectively) remained relatively consistent with repetitive monthly patterns in each year. The peak concentrations were observed from November to January and low concentrations from June to September. Anthropogenic activities contributed significantly to MBC over Delhi with background concentration contributing only 30 % of observed MBC. The percentage contribution of emissions from crop-residue burning varied from 15 % (May) to 37 % (November), while the contribution from heating activities ranged from 25 % (December) to 39 % (January). This source quantification study highlights the significant impact of month-specific biomass emissions in the IGP and can play a vital role in better management and control of these emissions in the region.

  • High-resolution analyses of concentrations and sizes of black carbon particles deposited on northwest Greenland over the past 350 years – Part 2: Seasonal and temporal trends in black carbon originated from fossil fuel combustion and biomass burning

    Kumiko Goto-Azuma, Yoshimi Ogawa-Tsukagawa, Kaori Fukuda, Koji Fujita, Motohiro Hirabayashi, Remi Dallmayr, Jun Ogata, Nobuhiro Moteki, Tatsuhiro Mori, Sho Ohata, Yutaka Kondo, Makoto Koike, Sumito Matoba, Teruo Aoki

    (Copernicus GmbH)   2024.05

    Research paper (scientific journal), Joint Work, Lead author, Corresponding author, Accepted

    　View Summary

    Abstract. The roles and impacts of black carbon (BC), an important aerosol species affecting Earth’s radiation budget, are not well understood owing to lack of accurate long-term observations. To study the temporal changes in BC since the pre-industrial period, we analysed BC in an ice core drilled in northwest Greenland. Using an improved technique for BC measurement and a continuous flow analysis system, we obtained accurate and high temporal resolution records of BC particle size and mass/number concentrations for the past 350 years. Number and mass concentrations, which both started to increase in the 1870s associated with inflow of anthropogenically derived BC, reached their maxima in the 1910s–1920s and then subsequently decreased. On the basis of backward trajectory analyses, we found that North America was the dominant source region of the anthropogenic BC in the ice core. The increase in anthropogenic BC shifted the annual concentration peaks of BC from summer to winter–early spring. After BC concentrations diminished to pre-industrial levels, the annual peak concentration of BC returned to the summer. We found that anthropogenic BC particles were larger than biomass burning BC particles. By separating the BC in winter and summer, we reconstructed the temporal variations in BC that originated from biomass burning, including the period with large anthropogenic input. The BC that originated from biomass burning showed no trend of increase until the early 2000s. Finally, possible albedo reductions due to BC are discussed. Our new data provide key information for validating aerosol and climate models, thereby supporting improved projections of future climate and environment.

display all >>

Page Top ▲

Papers, etc., Registered in KOARA 【 Display / hide 】

Page Top ▲

Reviews, Commentaries, etc. 【 Display / hide 】

  • Long-term variation in atmospheric aerosol particles over the central Tokyo and the summit of Mt. Fuji

    三浦和彦, 三浦和彦, 森樹大, 森樹大, 岩本洋子, 岩本洋子, 上田紗也子, 上田紗也子, 五十嵐博己, 桃井裕広, 桃井裕広, 青木一真, 青木一真, 齋藤天眞, 齋藤天眞, 伊藤佳樹, 伊藤佳樹, 大河内博, 加藤俊吾, 和田龍一

    日本地球惑星科学連合大会予稿集(Web) 2022 2022

    Lead author, Corresponding author

  • 東京におけるエアロゾル・雲相互作用のレジーム分類

    三隅良平, 宇治靖, 當房豊, 三浦和彦, 森樹大, 岩本洋子

    日本気象学会大会講演予稿集(CD-ROM)  ( 120 )  2021

    Lead author, Corresponding author

  • 東京スカイツリーにおける降水経験の有無によるエアロゾル粒子の吸湿性の違い

    田柳紗英, 森樹大, 三浦和彦, 岩本洋子, 速水洋, 三隅良平, 宇治靖, 當房豊

    大気電気学会誌(Web) 15 ( 1 )  2021

    Lead author, Corresponding author,  ISSN  1882-0549

  • Evaluation of surface condition on non-hygroscopic soot particles in urban

    上田紗也子, 森樹大, 岩本洋子, 丑久保裕太, 丑久保裕太, 三浦和彦

    エアロゾル科学・技術研究討論会(CD-ROM) 37th 2020

    Lead author, Corresponding author

  • 東京スカイツリーにおける新粒子生成及び粒子成長イベントの観測

    丑久保裕太, 五十嵐博己, 佐藤丈徳, 森樹大, 三浦和彦, 三隅良平, 宇治靖, 速水洋

    大気電気学会誌(Web) 14 ( 1 )  2020

    Lead author, Corresponding author,  ISSN  1882-0549

display all >>

Page Top ▲

Presentations 【 Display / hide 】

  • 水中に含まれる黒色酸化鉄粒子の測定法の確立

    森樹大, 近藤豊, 東久美子, 茂木信宏, 吉田淳, 福田かおり, 塚川佳美, 大畑祥, 小池真

    第39回エアロゾル学会・技術研究討論会, 

    2022.08
    , 

    Oral presentation (general)

Page Top ▲

Research Projects of Competitive Funds, etc. 【 Display / hide 】

  • ブラックカーボンの帯電状態の測定法の開発とその変動要因の観測的解明

    2024.04
    -
    2027.03

    日本学術振興会, Grants-in-Aid for Scientific Research, Grant-in-Aid for Scientific Research (C), Principal investigator

    　View Summary

    実環境大気中の微小粒子状物質の電荷数を推算する測定技術と、ブラックカーボン（BC）粒子の大きさごとの数・質量濃度を測定する装置を組み合わせることで、BC 粒子の帯電状態を高い時間分解能で観測可能な、新たな手法の確立を目指す。さらに、本測定手法を実大気観測に適用することで、実環境大気中のBCの帯電状態の変動要因を明らかにする。本研究の遂行により、数値モデルで表現されるエアロゾルの帯電メカニズムの表現を適切に精緻化することで、生体内に沈着する BC の粒子数の予測精度が一層向上すると期待される。

  • 北極気候に関わるエアロゾルの長期的変化の把握と放射・気候影響評価

    2023.04
    -
    2026.03

    環境再生保全機構, 環境省環境研究総合推進費, Principal investigator

  • 北極混相雲の動態と維持メカニズムの解明

    2022.04
    -
    2025.03

    日本学術振興会, Grants-in-Aid for Scientific Research, Grant-in-Aid for Scientific Research (B), Principal investigator

    　View Summary

    本研究の目的は、急速に進む北極温暖化の予測において重要な混相雲（水雲粒子と氷雲粒子 が共存した雲）が、「どのようなメカニズムによ
    り安定して維持されているのか」という問いに答えることである。本研究では北極域で唯一となる雲微物理量の連続観測を山岳観測所において
    実施し、統計的データに基づき北極混相雲の基本的な動態を明らかにする。そして混相雲の安定性の鍵と考えられる、氷雲粒子を生成するエア
    ロゾル（氷晶核）と氷雲粒子との対応関係を調べ、降雪による氷晶核除去過程や氷粒子の2次生成を評価する。これらの観測的知見に基づいて
    雲微物理モデルを改良することにより、混相雲が安定して維持されるメカニズムの解明を目指す。
    本研究の目的は、急速に進む北極温暖化の予測において重要な混相雲（水雲粒子と氷雲粒子 が共存した雲）が、「どのような微物理的特徴があり、安定して維持されているのか」という問いに答えることである。本研究では北極域で唯一となる雲微物理量の連続観測と氷晶核数濃度観測を山岳観測所において実施し、統計的データに基づき北極混相雲の基本的な動態を明らかにする。そして混相雲の安定性の鍵と考えられる、氷雲粒子を生成するエアロゾル（氷晶核）と氷雲粒子との対応関係を調べ、降雪による氷晶核除去過程や氷粒子の2次生成を評価する。これらの観測的知見に基づいて雲微物理モデルを改良することにより、混相雲が安定して維持されるメカニズムの解明を目指す。
    2023年度も継続してノルウェー領のニーオルスンのゼッペリン山観測所（79°N, 12°E, 海抜474 m）において、雲粒子および降水粒子の直接観測および氷晶核数濃度観測を1年間を通じて実施した。本年度は降水粒子の画像解析を進め、これらの粒子が水滴（球形）であるのか、氷粒子（非球形）であるのかを調べた。また2種類の降水粒子測定装置の間の整合性を調べた。さらに夏季に増大する氷晶核数濃度の季節変動を、雪氷の融解と地表面からの粒子放出の観点から説明した。
    2023年度にはまた、数値モデル計算の混層雲の安定性に関わる氷粒子の形状（晶癖）が雲のマクロな構造にどのような影響を与えるのか評価した。この結果、北極の混層雲の数値モデル計算において、氷晶核（エアロゾル）数濃度とともに、氷粒子の形状が鉛直積算雲水量などの雲の構造に少なからぬ影響を与えることを明らかにした。
    2023年度には、計画通りにニーオルスンのゼッペリン山観測所において、雲粒子・降水粒子の直接観測および氷晶核観測を1年間を通じて実施できた。また混層雲の維持・衰退の鍵となる氷粒子の降水について、粒子形状の観点から研究を進めた。数値北極混相雲のモデル計算についても計画どおりに数値計算を実施し、氷粒子の形状の影響を評価した。これらの成果を論文として発表した。
    本研究では、最終年度である2024年度も継続して北極域では世界唯一となる雲微物理量の直接かつ連続的観測を、ニーオルスンのゼッペリン山観測所で実施する。また氷晶核数濃度の継続的な観測も実施する。これらのデータは世界的にも特色のあるデータであり、我々自身が実施する研究以外にも広く活用されることが期待される。
    また2024年度は本研究の最終年度であるため、より定量的な議論を進め、研究をまとめる予定である。氷晶核として働くエアロゾルは気温が低くなるほど増加するので、その数濃度は各温度で働く氷晶核数濃度と雲頂気温の２つにより決まる。レーダ・ライダから推定される雲頂高度の気温に加えて大気中の氷晶核として働くエアロゾル数濃度の季節変動が明らかになりつつあるため、この両観測から実大気で働く氷晶核数濃度を推定する。そして雲レーダやライダにより氷を含む雲が出現している時間帯を抽出し、降水粒子と氷晶核の数濃度の対応を調べる。
    本研究では、世界最先端の雲微物理モデルAMPSを理化学研究所のSCALE大気モデルに移植した。このモデルを用いて北極混層雲に対する氷晶核数濃度変動の影響や氷粒子形状の影響を評価してきた。2024年度には本研究で観測された氷晶核数濃度と雲微物理量との対応の再現性や混層雲のメカニズムについて調べていく予定である。

  • ニーオルスンにおける黒色酸化鉄粒子の湿性沈着に関する観測的研究

    2022.04
    -
    2024.03

    国立極地研究所一般共同研究, Principal investigator

  • 帯電した化学種ごとの数濃度の測定手法の確立と実大気観測による動態解明

    2022.04
    -
    2023.03

    慶應義塾大学, 慶應義塾大学学術振興資金, Principal investigator

display all >>

Page Top ▲

Awards 【 Display / hide 】

  • Paper Award

    速水洋, 伊賀悠太, 三浦和彦, 森樹大, 櫻井達也, 2023.09, 大気環境学会(AJAE部門), Detection of Ship Fuel Sulfur Contents in Exhaust Plumes at the Kanmon Straits, Japan, before and after the Global Sulfur Limit 2020

  • 第98回研究発表会 学生発表表彰

    五十嵐博己, 森樹大, 三浦和彦, 岩本洋子, 和田龍一, 加藤俊吾, 大河内博, 2021.01, 日本大気電気学会, 富士山頂における日中と夜間の新粒子生成イベントの長期観測

  • 第97回研究発表会 学生発表表彰

    横山慎太郎, 永野勝裕, 三浦和彦, 櫻井達也, 森樹大, 2020.01, 日本大気電気学会, 富士山におけるラドン濃度変動と気塊由来の関係

  • 第96回研究発表会 学生発表表彰

    佐藤丈徳, 三浦和彦, 森樹大, 三隅良平, 宇治靖, 當房豊, 岩本洋子, 2019.01, 日本大気電気学会, 2016-2017年の東京スカイツリーで観測された新粒子生成の季節変化

  • 第12回学術奨励賞

    森樹大, 2018.09, 東京理科大学, 湿潤対流における大気エアロゾル粒子の降水除去効率の支配因子：観測的同定

display all >>

Page Top ▲
 

Courses Taught 【 Display / hide 】

  • LABORATORY IN SCIENCE

    2024

  • LABORATORIES IN APPLIED CHEMISTRY C

    2024

  • LABORATORY IN SCIENCE

    2023

  • LABORATORIES IN APPLIED CHEMISTRY C

    2023

  • LABORATORY IN SCIENCE

    2022

display all >>

Page Top ▲

Courses Previously Taught 【 Display / hide 】

  • 応用化学実験C

    慶應義塾大学

    2022.04
    -
    Present
    , 

    Full academic year, Laboratory work/practical work/exercise

  • 自然科学実験

    慶應義塾大学

    2022.04
    -
    Present
    , 

    Full academic year, Laboratory work/practical work/exercise

  • 物理学実験

    東京理科大学

    2017.04
    -
    2021.03
    , 

    Full academic year, Laboratory work/practical work/exercise

  • 物理数学演習

    東京理科大学

    2017.04
    -
    2021.03
    , 

    Full academic year, Laboratory work/practical work/exercise

Page Top ▲
 

Memberships in Academic Societies 【 Display / hide 】

  • 大気環境学会, 

    2023.04
    -
    Present

  • 富士山測候所を活用する会, 

    2017.04

  • 日本大気化学会, 

    2014
    -
    Present

  • 日本エアロゾル学会, 

    2013
    -
    Present

  • 日本気象学会, 

    2012
    -
    Present
Page Top ▲

Committee Experiences 【 Display / hide 】

  • 2023.09
    -
    Present

    若手会 副代表, 日本エアロゾル学会

  • 2022.09
    -
    Present

    大気環境学会AJAE委員

  • 2017.04
    -
    2017.11

    Committee Member, Symposium on Atmospheric Chemistry and Physics at Mountain Sites

Page Top ▲