Updated on 2025/04/08

写真a

 
MATSUI Hitoshi
 
Organization
Graduate School of Environmental Studies Department of Earth and Environmental Sciences Climate Science Associate professor
Graduate School
Graduate School of Environmental Studies
Undergraduate School
School of Science Department of Earth and Planetary Science
Title
Associate professor
Homepage
https://has.env.nagoya-u.ac.jp/~matsui/

Degree 1

  1. Doctor (Science) （ 2009.3   The University of Tokyo ） 

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Research Interests 4

  1. Three-dimensional model

  2. Climate Change

  3. Atmospheric Environment

  4. Aerosol

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Research Areas 2

  1. Environmental Science/Agriculture Science / Environmental dynamic analysis

  2. Natural Science / Atmospheric and hydrospheric sciences

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Current Research Project and SDGs 5

  1. 都市域における大気汚染に関する研究

  2. 地球規模でのエアロゾルと気候（放射・雲・雪氷・生態系）との相互作用に関する研究

  3. エアロゾルの半球規模の輸送過程に関する研究

  4. エアロゾルの生成・変質・除去過程に関する研究

  5. エアロゾル・大気化学に関する数値モデル開発

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Research History 2

  1. Nagoya University   Graduate School of Environmental Studies Department of Earth and Environmental Sciences Climate Science   Associate professor

    2020.4

  2. Nagoya University   Graduate School of Environmental Studies Department of Earth and Environmental Sciences Global Environmental Variation   Assistant Professor

    2015.4 - 2020.3

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Professional Memberships 4

  1. 日本気象学会

  2. 日本大気化学会

  3. 日本地球惑星科学連合

  4. American Geophysical Union

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Awards 3

  1. The Award of the Meteorological Society of Japan

    2022.5   Meteorological Society of Japan  

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    Award type：Award from Japanese society, conference, symposium, etc.  Country：Japan

  2. Shono Award of the Meteorological Society of Japan

    2014.11   Meteorological Society of Japan  

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    Award type：Award from Japanese society, conference, symposium, etc.  Country：Japan

  3. Young Scientist Award of the Japan Society of Atmospheric Chemistry

    2014.11   Japan Society of Atmospheric Chemistry  

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    Award type：Award from Japanese society, conference, symposium, etc.  Country：Japan

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Papers 91

  1. Aircraft-Based Observation of Mineral Dust Particles Over the Western North Pacific in Summer Using a Complex Amplitude Sensor Reviewed Open Access

    Ohata, S; Moteki, N; Adachi, K; Tobo, Y; Matsui, H; Kita, K; Mori, T; Koike, M

    JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES   Vol. 130 ( 5 )   2025.3

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    Language：English   Publishing type：Research paper (scientific journal)   Publisher：Journal of Geophysical Research: Atmospheres  

    Mineral dust accounts for a significant fraction of the atmospheric aerosol burden, impacting climate through its interactions with radiation and clouds. However, limited observations of dust particles in the free troposphere hinder our understanding of its spatial distribution and climatic impacts. In this study, aerosols were collected on filters using aircraft over the western North Pacific at 0.2–8 km altitudes in summer 2022. Individual water-insoluble particles dispersed in water were analyzed using a complex amplitude sensor (CAS), which enabled classifying particle type, sizing, and counting from the particle's complex amplitude data. During the eight observation flights, the number and mass concentrations of dust were 1.2 ± 1.0 cm−3 and 0.6 ± 0.4 μg m−3 (mean ± 1σ), respectively, in the 0.3–2.5 μm diameter range, which were 2–3 orders of magnitude lower than previously reported values near the major dust sources in East Asia. A comparison with the total aerosol data from an optical particle counter onboard aircraft suggested that dust dominated aerosols larger than 0.8 μm, consistent with electron microscopy analyses. The observed dust size distributions implied more efficient removal of larger dust during transport. Since our samples were collected at −18°C to 21°C, the free tropospheric dust could contribute to ice formation in clouds. Our observation using the CAS revealed microphysical properties of dust over the western North Pacific when no distinct Asian dust events were observed near the ground, aiding in the validation of models that assess the climatic impacts of dust.

    DOI： 10.1029/2024JD043063

    Open Access

    Web of Science

    Scopus

  2. AERO-MAP: A data compilation and modelling approach to understand spatial variability in fine and coarse mode aerosol composition Reviewed International coauthorship

    Natalie M. Mahowald, Longlei Li, Julius Vira, Marje Prank, Douglas S. Hamilton, Hitoshi Matsui, Ron L. Miller, Louis Lu, Ezgi Akyuz, Daphne Meidan, Peter G. Hess, Heikki Lihavainen, Christine Wiedinmyer, Jenny Hand, Maria Grazia Alaimo, Célia Alves, Andres Alastuey, Paulo Artaxo, Africa Barreto, Francisco Barraza, Silvia Becagli, Giulia Calzolai, Shankararaman Chellam, Ying Chen, Patrick Chuang, David D. Cohen, Cristina Colombi, Evangelia Diapouli, Gaetano Dongarra, Konstantinos Eleftheriadis, Johann Engelbrecht, Corinne Galy-Lacaux, Cassandra Gaston, Dario Gomez, Yenny González Ramos, Roy M. Harrison, Chris Heyes, Barak Herut, Philip Hopke, Christoph Hüglin, Maria Kanakidou, Zsofia Kertesz, Zbigniew Klimont, Katriina Kyllönen, Fabrice Lambert, Xiaohong Liu, Remi Losno, Franco Lucarelli, Willy Maenhaut, Beatrice Marticorena, Randall V. Martin, Nikolaos Mihalopoulos, Yasser Morera-Gomez, Adina Paytan, Joseph Prospero, Sergio Rodríguez, Patricia Smichowski, Daniela Varrica, Brenna Walsh, Crystal Weagle, and Xi Zhao

    ATMOSPHERIC CHEMISTRY AND PHYSICS     2025

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    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： https://doi.org/10.5194/egusphere-2024-1617

  3. Representation of iron aerosol size distributions of anthropogenic emissions is critical in evaluating atmospheric soluble iron input to the ocean Reviewed International coauthorship

    Liu, MX; Matsui, H; Hamilton, DS; Rathod, SD; Lamb, KD; Mahowald, NM

    ATMOSPHERIC CHEMISTRY AND PHYSICS   Vol. 24 ( 22 ) page： 13115 - 13127   2024.11

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    Authorship：Corresponding author   Language：English   Publishing type：Research paper (scientific journal)   Publisher：Atmospheric Chemistry and Physics  

    Atmospheric aerosol deposition acts as a major source of soluble (bioavailable) iron in open ocean regions where it limits phytoplankton growth and primary production. The aerosol size distribution of emitted iron particles, along with particle growth from mixing with other atmospheric components, is an important modulator of its long-range transport potential. There currently exists a large uncertainty in the particle size distribution of iron aerosol, and the extent to which such uncertainty shapes global soluble iron deposition remains unclear. Here, we couple a sophisticated microphysical, size-resolved aerosol model with an iron-speciated and iron-processing module to disentangle the impact of iron emission size distributions on soluble iron input to the ocean, with a focus on anthropogenic combustion and metal smelting sources. We evaluate our model results against a global-scale flight measurement dataset for anthropogenic iron concentration and show that the different representations of iron size distribution upon emission, as adopted in previous studies, introduce a variability in modeled iron concentrations over remote oceans of a factor of 10. Shifting the iron aerosol size distribution toward finer particle sizes (< 1 μm) enables a longer atmospheric lifetime (a doubling), promoting atmospheric processing, which enhances the soluble iron deposition to ocean basins by up to 50 % on an annual basis. The monthly enhancements reach 110 % and 80 % over the Southern Ocean and North Pacific Ocean, respectively. Uniquely, our results highlight that compared with emission flux variability, iron emission size distribution plays an equally important role in regulating soluble iron deposition, especially to the remote oceans. Our new findings can help to interpret inter-model differences in iron deposition estimation and to better quantify the effects of atmospheric nutrient input on marine biogeochemistry, including but not limited to iron and phosphorus.

    DOI： 10.5194/acp-24-13115-2024

    Web of Science

    Scopus

  4. Increasing Arctic dust suppresses the reduction of ice nucleation in the Arctic lower troposphere by warming Reviewed

    Matsui, H; Kawai, K; Tobo, Y; Iizuka, Y; Matoba, S

    NPJ CLIMATE AND ATMOSPHERIC SCIENCE   Vol. 7 ( 1 )   2024.11

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    Authorship：Lead author,　Corresponding author   Language：English   Publishing type：Research paper (scientific journal)   Publisher：npj Climate and Atmospheric Science  

    Ice nucleating particles (INPs) affect the cloud radiative budget in the rapidly warming Arctic by changing the cloud liquid/ice phase balance. Dust emitted in the Arctic (Arctic dust) has been suggested to be a major contributor to INPs in the Arctic lower troposphere. However, how Arctic dust and its impacts on ice nucleation change with Arctic warming has not been explored. Here we find that the simulated dust emission flux in the Arctic (>60°N) in global model simulations increases by 20% from 1981–1990 to 2011–2020. This increase weakens the sensitivity of ice nucleation in Arctic lower tropospheric clouds to warming by 40% compared to the case without considering Arctic dust emission increases. Our results demonstrate a better understanding of the counterbalancing feedbacks of Arctic dust (i.e., increasing emissions and decreasing ice nucleation efficiency) is needed for more accurate estimates of changes in ice nucleation in the rapidly changing Arctic climate.

    DOI： 10.1038/s41612-024-00811-1

    Web of Science

    Scopus

  5. Surface warming in Svalbard may have led to increases in highly active ice-nucleating particles Reviewed International coauthorship Open Access

    Tobo, Y; Adachi, K; Kawai, K; Matsui, H; Ohata, S; Oshima, N; Kondo, Y; Hermansen, O; Uchida, M; Inoue, J; Koike, M

    COMMUNICATIONS EARTH & ENVIRONMENT   Vol. 5 ( 1 )   2024.9

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    Language：English   Publishing type：Research paper (scientific journal)   Publisher：Communications Earth and Environment  

    The roles of Arctic aerosols as ice-nucleating particles remain poorly understood, even though their effects on cloud microphysics are crucial for assessing the climate sensitivity of Arctic mixed-phase clouds and predicting their response to Arctic warming. Here we present a full-year record of ice-nucleating particle concentrations over Svalbard, where surface warming has been anomalously faster than the Arctic average. While the variation of ice-nucleating particles active at around −30 °C was relatively small, those active at higher temperatures (i.e., highly active ice-nucleating particles) tended to increase exponentially with rising surface air temperatures when the surface air temperatures rose above 0 °C and snow/ice-free barren and vegetated areas appeared in Svalbard. The aerosol population relevant to their increase was largely characterized by dust and biological organic materials that likely originated from local/regional terrestrial sources. Our results suggest that highly active ice-nucleating particles could be actively released from Arctic natural sources in response to surface warming.

    DOI： 10.1038/s43247-024-01677-0

    Open Access

    Web of Science

    Scopus

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Books 2

  1. Impacts of climate change on particulate matter (PM) Reviewed

    Liu M. and Matsui H.（ Role： Joint author）

    Handbook of Air Quality and Climate Change, Springer Nature Singapore Pte Ltd  2023.5 

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    Language：English Book type：Scholarly book

    DOI： doi.org/10.1007/978-981-15-2527-8_39-1

  2. Impacts of Climate Change on Particulate Matter

    Liu M., Matsui H.（ Role： Sole author）

    Handbook of Air Quality and Climate Change  2023.1  （ ISBN:9789811527609, 9789811527593 ）

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    Language：Japanese

    Climate change affects the interannual and decadal variabilities of airborne particulate matters (PM) through modifications to a variety of climate factors including solar radiation, temperature, wind speeds, precipitation, etc. The complicated responses of PM to climate change and their feedbacks within the Earth system have yet to be resolved. Here, the recent research progress is summarized for the following three points: (1) climate impacts on PM sources, (2) climate impacts on PM distributions and lifetimes, and (3) interactions between PM and climate change. First, the emissions of PM from wind erosion in deserts, vegetation wildfires, terrestrial biosphere, and oceans are of great potential to be susceptible to climate anomalies. Climate change can induce changes in both physical and biological processes in natural ecosystems that drive the production of PM or their precursors. Second, the climate-driven changes in atmospheric circulation and precipitation influence the atmospheric transport of PM and their lifetimes. Third, these changes in PM could initiate climate feedback mechanisms through direct interactions with shortwave and longwave radiation and indirect interactions with clouds, biological activities, and the cryosphere. The PM-climate feedbacks in the Arctic region may contribute to the Arctic amplification via aerosol-cloud interactions and snow/ice albedo feedbacks. Earth system models are a powerful tool to examine the sensitivity of PM emissions and global distributions to isolated or coupled climate factors and to project trends in PM under a changing climate. Process-level understanding on PM-climate feedbacks is required to improve the credibility of PM projection by models.

    DOI： 10.1007/978-981-15-2760-9_39

    Scopus

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Presentations 1

  1. Sulfate aerosol composition and flux during 1970's derived from the SE-Dome ice core, Greenland

    Iizuka Yoshinori, Uemura Ryu, Matsui Hitoshi, Oshima Naga, Matoba Sumito

    Summaries of JSSI and JSSE Joint Conference on Snow and Ice Research  2020  The Japanese Society of Snow and Ice / Japan Society for Snow Engineering

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    Language：Japanese   Presentation type：Oral presentation (general)  

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Research Project for Joint Research, Competitive Funding, etc. 4

  1. 地球温暖化に関わる北極ブラックカーボンとダスト粒子の動態と放射効果

    2017.4 - 2020.3

    環境省環境研究総合推進費・環境問題対応型 

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    Grant type：Competitive

  2. エアロゾルの次世代型全球モデルの開発とその気候影響・多圏相互作用に関する研究

    2016.1 - 2018.1

    日本学術振興会海外特別研究員制度 

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    Grant type：Competitive

  3. 北極気候に関わるブラックカーボン等エアロゾルの動態・発生源と雲・放射影響

    2015.4 - 2020.3

    文部科学省環境技術等研究開発推進事業・北極域研究推進プロジェクト（ArCSプロジェクト） 

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    Grant type：Competitive

  4. 地球温暖化に関わるブラックカーボン放射効果の総合的評価

    2014.4 - 2017.3

    環境省環境研究総合推進費・環境問題対応型 

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    Grant type：Competitive

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KAKENHI (Grants-in-Aid for Scientific Research) 29

  1. Refined evaluation of dynamics of wave-associated aerosol particles and air-sea mass exchange

    Grant number：24H02225  2024.4 - 2029.3

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

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    Authorship：Coinvestigator(s)  Grant type：Competitive

  2. 鉱物ダストの被覆量・組成に着目した気候モデルの開発と気候影響評価の刷新

    Grant number：23K18519  2023.6 - 2026.3

    科学研究費助成事業  挑戦的研究(萌芽)

    松井 仁志

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    Authorship：Principal investigator  Grant type：Competitive

    Grant amount：\6500000 （ Direct Cost: \5000000 、 Indirect Cost：\1500000 ）

    砂漠域などから放出される鉱物ダストは様々な粒子特性（粒径・鉱物組成など）を持つが、それが気候に与える影響の理解は乏しい。本研究では、ダストの個々の粒子の特性を詳細に計算可能な数値モデルを新たに開発する。そして、ダストの粒子特性がダストの時空間分布や長距離輸送過程などに及ぼす影響を評価するとともに、ダストが放射・雲過程に与える影響や、放出源から長距離を輸送されて雪氷圏や生態系に及ぼす影響の推定を高精度化することを目指す。

  3. Exploring new indicators representing the hygroscopicity of atmospheric organic aerosol

    Grant number：23H00515  2023.4 - 2027.3

    Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (A)

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    Authorship：Coinvestigator(s)  Grant type：Competitive

    Grant amount：\3055000 （ Direct Cost: \2350000 、 Indirect Cost：\675000 ）

  4. 温暖化に伴う両極の雲形成過程の変化の影響評価

    Grant number：23H00523  2023.4 - 2026.3

    科学研究費助成事業  基盤研究(A)

    猪上 淳, 庭野 匡思, 松井 仁志, 當房 豊, 佐藤 和敏

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    Authorship：Coinvestigator(s)  Grant type：Competitive

    Grant amount：\16250000 （ Direct Cost: \12500000 、 Indirect Cost：\3750000 ）

    地球温暖化の将来予測モデルでは、観測された北極域での温暖化傾向が過小評価され、一方、温暖化が不明瞭な南極域でその傾向が過大評価されるという、対照的な両極の気温バイアスがある。この一因として、極域の雲の再現性の問題が考えられる。地球表層のエネルギー収支に主要な寄与をする日射量と長波放射量は、雲の相状態（水雲か氷雲か）に強く依存する。雲の相状態は環境場と雲の核となるエアロゾルの組成で決まるが、近年、エアロゾルの供給過程が温暖化の影響で変化している。本研究では、両極の下層雲の形成環境に特化した観測を実施し、先進的な気候モデルの改良を通じて両極の気温バイアスの問題を追究し、気候予測の精緻化に貢献する。

  5. 氷晶核の全球分布とその雲過程を通した気候影響の解明

    Grant number：22H03722  2022.4 - 2025.3

    科学研究費助成事業  基盤研究(B)

    松井 仁志, 茂木 信宏, 當房 豊

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    Authorship：Principal investigator  Grant type：Competitive

    Grant amount：\17290000 （ Direct Cost: \13300000 、 Indirect Cost：\3990000 ）

    大気中の微粒子は、雲の氷晶の核（氷晶核）として働き、雲の放射収支などを変化させる。しかし、この過程についての科学的な知見は限られており、気候変動予測において大きな不確定要素となっている。この過程を解明するため、本研究では氷晶核に着目した新たな気候モデルを開発し、大気中の氷晶核の空間分布の推定を高度化する。そして、氷晶核が雲の放射収支などに与える気候影響の推定精度を向上させる。

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To the head of KAKENHI (Grants-in-Aid for Scientific Research).▲