Updated on 2025/02/05

写真a

 
TAKAHASHI Naoya
 
Organization
Academic Assembly Institute of Science and Technology CHIKYU SEIBUTSU KAGAKU KEIRETU Assistant Professor
Graduate School of Science and Technology Environmental Science and Technology Assistant Professor
Faculty of Science Department of Science Assistant Professor
Title
Assistant Professor
External link

Degree

  • Doctor of Science ( 2020.3   Tohoku University )

Research Interests

  • Extreme events

  • Ocean Mixed Layer

  • Air-Sea Interactions

  • Marine Heat Waves

  • Cloud

Research Areas

  • Natural Science / Atmospheric and hydrospheric sciences

Research History (researchmap)

  • Niigata University   Faculty of Science   Assistant Professor

    2024.4

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  • University of Hawaii at Manoa   International Pacific Research Center   Postdoctoral Researcher

    2020.10 - 2024.3

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    Country：United States

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  • Tohoku University   Graduate School of Science   Researcher

    2020.4 - 2020.9

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    Country：Japan

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Research History

  • Niigata University   Department of Science, Faculty of Science   Assistant Professor

    2024.4

  • Niigata University   Environmental Science and Technology, Graduate School of Science and Technology   Assistant Professor

    2024.4

  • Niigata University   Institute of Science and Technology, Academic Assembly   Assistant Professor

    2024.4

Education

  • Tohoku University   Graduate School of Science   Department of Geophysics

    2015.4 - 2020.3

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    Country： Japan

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  • Tohoku University   Faculty of Science   Department of Astronomy and Geophysics

    2011.4 - 2015.3

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    Country： Japan

    Notes： 地球物理学コース

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Professional Memberships

 

Papers

  • Observed Relative Contributions of Anomalous Heat Fluxes and Effective Heat Capacity to Sea Surface Temperature Variability Reviewed

    Naoya Takahashi, Kelvin J. Richards, Niklas Schneider, Malte F. Stuecker, Hariharasubramanian Annamalai, Masami Nonaka

    Geophysical Research Letters   2023.9

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    Authorship：Lead author   Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1029/2023GL103165

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  • Disentangling the North Pacific Meridional Mode from tropical Pacific variability Reviewed

    Ingo Richter, Malte F. Stuecker, Naoya Takahashi, Niklas Schneider

    npj Climate and Atmospheric Science   2022.11

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

    DOI： 10.1038/s41612-022-00317-8

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  • Formation Mechanism of Warm SST Anomalies in 2010s Around Hawaii Reviewed

    Naoya Takahashi, Kelvin J. Richards, Niklas Schneider, H. Annamalai, Wei‐Ching Hsu, Masami Nonaka

    Journal of Geophysical Research: Oceans   126 ( 11 )   2021.11

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    Authorship：Lead author   Language：English   Publishing type：Research paper (scientific journal)   Publisher：American Geophysical Union ({AGU})  

    Warm sea surface temperature (SST) anomalies have been observed in the subtropical North Pacific around Hawaii in the recent decade, appearing from 2013. We examined the formation mechanisms of the warm SST anomalies in terms of relative contribution of atmospheric surface forcing and oceanic dynamics, using the latest reanalysis products from ECMWF (ERA5 for atmosphere and ORAS5 for ocean). Results of the mixed layer temperature budget diagnosis in the target area (10-20 degrees N and 180 degrees-160 degrees W) indicates that contributions from anomalous latent heat fluxes to the subtropical SST anomalies are dominant. Oceanic advective contributions play a secondary role, dampen the SST anomalies, and are negatively correlated (r = -0.38) with the latent heat fluxes. For example, the +1.0 K SST increased from 2011 to 2015 results from +1.5 K contributions from sum of surface heat flux and -0.5 K from meridional oceanic advection. The anti-correlation between atmospheric forcing and oceanic meridional advection reflects co-variations of wind-driven latent heat flux and meridional Ekman advection due to the weakening of the zonal component of the surface winds.Plain Language Summary Sea surface temperature (SST) is one of the key factors controlling not only local but also global climate variabilities. SST around Hawaii has been higher than the usual state since 2013, and once reached 28.5 degrees C in 2015. SST anomaly also reached twice the standard deviation, indicating that this is a very rare case. In this study, we performed mixed layer temperature budget diagnostics using observational and reanalysis datasets to clarify which mechanism is responsible for the formation of the recent SST anomalies. The temperature budget diagnostics revealed that the weakening of the latent heat release dominantly contributed to the formation of the warm SST anomalies, while oceanic horizontal advective process contributed to the damping of the anomalies. It is also found that the contributions from the two processes compensate each other. This can be explained by the physical connection between the latent heat release and meridional Ekman advection driven by trade wind changes.

    DOI： 10.1029/2021JC017763

    Web of Science

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  • Observed response of marine boundary layer cloud to the interannual variations of summertime Oyashio extension SST front Reviewed

    Naoya Takahashi, Tadahiro Hayasaka, Bo Qiu, Ryohei Yamaguchi

    Climate Dynamics   56 ( 11-12 )   3511 - 3526   2021.6

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    Authorship：Lead author   Language：English   Publishing type：Research paper (scientific journal)   Publisher：Springer Science and Business Media {LLC}  

    DOI： 10.1007/s00382-021-05649-4

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  • Air–Sea Interactions among Oceanic Low-Level Cloud, Sea Surface Temperature, and Atmospheric Circulation on an Intraseasonal Time Scale in the Summertime North Pacific Based on Satellite Data Analysis Reviewed

    Takahashi, Naoya, Hayasaka, Tadahiro

    Journal of Climate   33 ( 21 )   9195 - 9212   2020.11

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    Authorship：Lead author   Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1175/JCLI-D-19-0670.1

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  • Impact of the Oyashio Extension SST Front on Synoptic Variability of Oceanic Low‐Level Cloud in Summertime Based on WRF Numerical Simulation Reviewed

    Takahashi, Naoya, Hayasaka, Tadahiro, M, a, Atsuyoshi, Schneider, Niklas

    Journal of Geophysical Research: Atmospheres   125 ( 17 )   2020.9

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    Authorship：Lead author   Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1029/2020JD032518

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  • Characteristics of Diurnal Pulses Observed in Typhoon Atsani Using Retrieved Cloud Property Data Reviewed

    Xinyue Wang, Hironobu Iwabuchi, Naoya Takahashi

    SOLA   15   137 - 142   2019

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    Language：English   Publishing type：Research paper (scientific journal)   Publisher：Meteorological Society of Japan  

    DOI： 10.2151/sola.2019-025

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  • Ice cloud microphysical properties in tropical Pacific regions derived from CloudSat and CALIPSO measurements Reviewed

    Naoya Takahashi, Tadahiro Hayasaka, Hajime Okamoto

    AIP Conference Proceedings   1810   2017.2

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    Authorship：Lead author   Language：English   Publishing type：Research paper (international conference proceedings)   Publisher：AMER INST PHYSICS  

    © 2017 Author(s). We revealed the difference in tropical ice cloud microphysical properties between the western Pacific (WP) and the eastern Pacific (EP), based on satellite retrievals. Vertical profile of effective particle radius of ice cloud (re) was estimated from active sensors on board CloudSat and CALIPSO satellites. In this study, we focused only on ice cloud which is defined as clouds with the cloud top temperature lower than 0°C. To investigate the relationship between cloud optical properties and cloud vertical structures, these ice clouds were classified into five types based on cloud optical thickness values. Compared the vertical profile of re in WP with that in the EP, re around the freezing level within convective cloud in EP slightly larger than that in WP. This analysis also shows that re of optically thick cloud is larger than that of optically thin cloud. The difference in re may be caused by differences in moisture convergence, upward motion, aerosols.

    DOI： 10.1063/1.4975529

    Web of Science

    Scopus

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  • Differences in Ice Cloud Microphysical Properties between Western and Eastern Tropical Pacific Regions Derived from CloudSat and CALIPSO Measurements Reviewed

    Takahashi, Naoya, Hayasaka, Tadahiro, Okamoto, Hajime

    SOLA   12   91 - 95   2016

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    Authorship：Lead author   Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.2151/sola.2016-021

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Presentations

  • Relative Contributions Of Anomalous Heat Fluxes And Effective Heat Capacity To Sea Surface Temperature Variability In The Extra-tropics

    Naoya Takahashi, Kelvin Richards, Niklas Schneider, H. Annamalai, Malte Stuecker, Masami Nonaka

    Ocean Science Meeting 2024  2024.2 

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    Language：English   Presentation type：Oral presentation (general)  

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  • Role of Ocean Mixed Layer Processes in the SST Anomalies Around Hawaii

    Naoya Takahashi, Kelvin Richards, Niklas Schneider, Malte Stuecker, H. Annamalai, Masami Nonaka

    The 2nd international workshop of Hotspot2  2023.6 

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    Language：English   Presentation type：Poster presentation  

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  • Role of Mixed Layer Processes in the Formation of Recent SST Anomalies Around Hawaii

    Naoya Takahashi, Kelvin Richards, Niklas Schneider, Malte Stuecker, H. Annamalai, Masami Nonaka

    IRRC-KIST-IPRC Workshop  2023.1 

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    Language：English   Presentation type：Oral presentation (general)  

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  • Role of Oceanic Processes in the Formation Mechanism of Warm SST Anomalies in 2010s Around Hawaii Invited

    Naoya Takahashi, Kelvin Richards, Niklas Schneider, H. Annamalai, Wei-Ching Hsu, Masami Nonaka

    JpGU meeting 2022  2022.5 

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    Language：English   Presentation type：Oral presentation (invited, special)  

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  • Formation Mechanism of Warm SST Anomalies in 2010s Around Hawaii

    Naoya Takahashi, Kelvin Richards, Niklas Schneider, H. Annamalai, Wei-Ching Hsu, Masami Nonaka

    Ocean Science Meeting 2022  2022.2 

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    Language：English   Presentation type：Oral presentation (general)  

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  • 夏季北太平洋における下層雲と海面水温の相互作用に関する研究 Invited

    高橋直也

    日本気象学会2021年度秋季大会  2021.12 

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    Language：Japanese   Presentation type：Symposium, workshop panel (nominated)  

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  • Intra-Seasonal Variability of Oceanic Low-level Cloud Cover in Summertime North Pacific and its Interaction with Sea Surface Temperature

    Naoya Takahashi, Tadahiro Hayasaka

    AGU Fall Meeting 2019  2019.12 

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    Language：English   Presentation type：Poster presentation  

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  • 親潮に伴う海面水温前線の夏季下層雲への影響

    高橋直也, 早坂忠裕, 万田敦昌, Niklas Schneider

    日本気象学会2019年度秋季大会  2019.10 

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    Language：Japanese   Presentation type：Poster presentation  

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  • Intra-Seasonal Variability of Oceanic Low-level Cloud Cover in Summertime North Pacific and its Interaction with Sea Surface Temperature Invited

    Naoya Takahashi, Tadahiro Hayasaka

    JpGU Meeting 2019  2019.5 

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    Language：English   Presentation type：Oral presentation (invited, special)  

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  • Seasonality and Co-variability of Sea Surface Temperature Front and South Boundary of Low-Cloud Cover in the Mid-latitude North Pacific

    Naoya Takahashi, Tadahiro Hayasaka, Bo Qiu, Toshio Suga, Ryohei Yamaguchi

    AGU Fall meeting 2018  2018.12 

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    Language：English   Presentation type：Poster presentation  

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  • 夏季北太平洋の海面前線帯における下層雲変動と温度移流の関係

    高橋直也, 早坂忠裕

    日本気象学会2018年度秋季大会  2018.10 

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    Language：Japanese   Presentation type：Poster presentation  

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  • 北太平洋における下層雲と海面水温前線の季節変化と共変動性

    高橋直也, 早坂忠裕

    日本海洋学会2018年度秋季大会  2018.9 

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    Language：Japanese   Presentation type：Poster presentation  

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  • 北太平洋における下層雲と海面水温前線の季節変化と共変動性

    高橋直也, 早坂忠裕

    日本気象学会2018年度春季大会  2018.5 

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    Language：Japanese   Presentation type：Poster presentation  

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  • 熱帯海洋上の対流雲から派生するアンビルの雲微物理特性と海面水温依存性

    高橋直也, 早坂忠裕

    日本気象学会2017年度秋季大会  2017.10 

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    Language：Japanese   Presentation type：Oral presentation (general)  

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  • Studies on horizontal scale, vertical scale, and microphysical properties of convective cloud in tropical Pacific by using Cloud Object analysis method

    Naoya Takahashi, Tadahiro Hayasaka

    JpGU-AGU Joint Meeting  2017.5 

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    Language：English   Presentation type：Poster presentation  

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  • Cloud Object解析手法を用いた熱帯域の雲特性と環境場の関係の解明

    高橋直也, 早坂忠裕

    日本気象学会2016年度秋季大会  2016.10 

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    Language：Japanese   Presentation type：Poster presentation  

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  • 東西熱帯太平洋における降水と雲物理特性の関係

    高橋直也, 早坂忠裕

    日本気象学会2016年度春季大会  2016.5 

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    Language：Japanese   Presentation type：Poster presentation  

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  • Cloud microphysical properties in tropical Pacific regions derived from CloudSat and CALIPSO

    Naoya Takahashi, Tadahiro Hayasaka, Hajime Okamoto

    International Radiation Symposium  2016.4 

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    Language：English   Presentation type：Poster presentation  

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  • 東西熱帯太平洋における雲微物理特性の違い

    高橋直也, 早坂忠裕, 岡本創

    日本気象学会2015年度秋季大会  2015.10 

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    Language：Japanese   Presentation type：Poster presentation  

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  • The Difference of Cloud Microphysics in the West-East Tropical Pacific

    Naoya Takahashi, Tadahiro Hayasaka, Hajime Okamoto

    Tropical Meteorology Workshop  2015.9 

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    Language：English   Presentation type：Oral presentation (general)  

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Awards

  • Yamamoto Award

    2021.12   The Meteorological Society of Japan   Interaction between low-level cloud and sea surface temperature in the North Pacific during summertime

    Naoya Takahashi

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Research Projects

  • 塩分により海洋熱波が変調するプロセスを紐解く

    Grant number：24K22899

    2024.7 - 2026.3

    System name：科学研究費助成事業

    Research category：研究活動スタート支援

    Awarding organization：日本学術振興会

    高橋 直也

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    Grant amount：\2730000 （ Direct Cost: \2100000 、 Indirect Cost：\630000 ）

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  • Heavy rainfall and heavy snowfall associated with rapid warming of the ocean front around Japan

    Grant number：24H02222

    2024.4 - 2029.3

    System name：Grants-in-Aid for Scientific Research

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

    Awarding organization：Japan Society for the Promotion of Science

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    Grant amount：\164970000 （ Direct Cost: \126900000 、 Indirect Cost：\38070000 ）

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  • Study on three dimensional cloud structure and cloud microphysical process using satellite-based passive and active sensors

    Grant number：18J10606

    2018.4 - 2020.3

    System name：Grants-in-Aid for Scientific Research Grant-in-Aid for JSPS Fellows

    Research category：Grant-in-Aid for JSPS Fellows

    Awarding organization：Japan Society for the Promotion of Science

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    Grant amount：\1500000 （ Direct Cost: \1500000 ）

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Teaching Experience

  • 環境ガバナンス概論

    2024
    Institution name：新潟大学

  • 気象解析実習

    2024
    Institution name：新潟大学

  • 自然環境科学実験A2

    2024
    Institution name：新潟大学

  • 自然環境科学総論

    2024
    Institution name：新潟大学

  • 地域災害環境システム学演習

    2024
    Institution name：新潟大学

  • 自然環境科学研究演習

    2024
    Institution name：新潟大学

  • 環境物理学

    2024
    Institution name：新潟大学

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