Faculty Profiles - TOKINAGA HIROKI

Information

写真a

TOKINAGA HIROKI

Organization

Research Institute for Applied Mechanics Division of Earth Environment Dynamics Professor
Interdisciplinary Graduate School of Engineering Sciences Department of Interdisciplinary Engineering Sciences（Joint Appointment）

Contact information

Profile

My research interests include climate variability and change, with a particular focus on basin-scale ocean-atmosphere interactions over the tropical oceans. We aim to clarify physical mechanisms for and improve future predictions of climate phenomena by synthesizing ocean and atmospheric observations and climate model experiments.

External link

Degree

Ph.D (Environmental Earth Science)

Research History

独立行政法人海洋研究開発機構 (2005年4月-2007年9月)

独立行政法人海洋研究開発機構 (2005年4月-2007年9月)
ハワイ大学国際太平洋研究センター　(2007年10月-2014年3月) 京都大学白眉センター (2014年4月-2019年3月)

Research Interests・Research Keywords

Research theme：Tropical Basin Interaction

Keyword：climate variability, ocean-atmosphere interaction, atmospheric teleconnection, climate change

Research period： 2020.1
Research theme：Influence of persistent El Niño/Southern Oscillation events on the Atlantic Niño

Keyword：El Niño/Southern Oscillation, Atlantic Niño, atmospheric teleconnection

Research period： 2018.4
Research theme：Arctic warming and interdecadal oscillation over the Pacific and Atlantic

Keyword：Arctic amplification, Interdecadal Pacific Oscillation, Atlantic Multidecadal Oscillation

Research period： 2015.4
Research theme：Reconstruction of global marine surface wind dataset from ship observations

Keyword：Marine surface wind, ship observations, climate change

Research period： 2010.9
Research theme：Mechanisms for climate change pattern formation over tropical oceans

Keyword：Climate change, ocean-atmosphere interaction, climate models

Research period： 2009.10
Research theme：Ocean-atmosphere interaction near the mid-latitude sea surface temperature fronts

Keyword：Satellite and ship observations, radiosonde, surface heat flux, atmospheric boundary layer, high-resolution ocean-atmosphere coupled models

Research period： 2003.4

Awards

科学技術分野の文部科学大臣表彰若手科学者賞

2015.4 文部科学省業績名「気候の形成と変動に影響を及ぼす大気海洋相互作用の研究」
岡田賞

2013.3 日本海洋学会業績名「大気海洋相互作用を伴う熱帯海洋の長期変化に関する研究」
山本・正野論文賞

2012.10 日本気象学会受賞対象論文: Tokinaga et al. (2012), Regional patterns of tropical Indo-Pacific climate change: Evidence of the Walker Circulation weakening. Journal of Climate, 25, 1689-1710.
松野記念論文賞

2002.3 北海道大学大学院地球環境科学研究科大気海洋圏環境科学専攻修士論文「インド洋ダイポール現象と熱帯太平洋大気海洋変動との季節的な関係」

Papers

The extraordinary equatorial Atlantic warming in late 2019 Reviewed International journal

Ingo Richter, Hiroki Tokinaga, Yuko M. Okumura

Geophysical Research Letters 49 ( 4 ) e2021GL095918 2022.2 （ ISSN:00948276 eISSN:19448007 ）

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Sea-surface temperatures (SSTs) in the eastern equatorial Atlantic are subject to variability on interannual timescales but during the last 20 years, this variability has shown comparatively little activity. In late 2019, however, the warmest event in the satellite observation period developed. Analysis suggests that zonal wind stress anomalies in the western equatorial Atlantic contributed to the development of the warm SST anomalies. Furthermore, wind stress curl anomalies north of the equator generated downwelling Rossby waves that propagated to the western boundary and were reflected into downwelling Kelvin waves that helped to precondition the event. Neither the contemporaneous positive Indian Ocean Dipole nor the El Niño Modoki appears to have contributed substantially to the Atlantic warming, though some uncertainty remains. Based on large-scale multidecadal variability patterns, a return to enhanced variability is not imminent but careful monitoring will be important.

DOI： 10.1029/2021GL095918

Web of Science

Scopus

CiNii Research

Repository Public URL： https://hdl.handle.net/2324/7161005
An overview of the performance of CMIP6 models in the tropical Atlantic: mean state, variability, and remote impacts Reviewed International journal

Ingo Richter, Hiroki Tokinaga

Climate Dynamics 55 2579 - 2601 2020.8

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DOI： 10.1007/s00382-020-05409-w
ENSO influence on the Atlantic Niño, revisited: Multi-year versus single-year ENSO events Reviewed International journal

32 ( 14 ) 4585 - 4600 2019.6

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The influence of El Niño-Southern Oscillation (ENSO) on the Atlantic Niño over the past 113 years is investigated by comparing multi-year and single-year ENSO events. Multi-year ENSO events sustain an anomalous zonal gradient of sea surface temperature (SST) in the equatorial western to central Pacific even during boreal spring and summer. This SST gradient is coupled with an anomalous Walker circulation and atmospheric deep convection through the Bjerknes feedback. During multi-year La Niñas, for example, a strengthened Pacific Walker circulation extends into the tropical Atlantic in boreal spring, a season when both the Pacific and Atlantic intertropical convergence zones become more symmetric about the equator. As a result, surface westerly wind anomalies appear over the equatorial Atlantic, triggering an Atlantic Niño. By contrast, such a teleconnection is not found in the spring following the peak of single-year ENSO events. A Pacific pacemaker model experiment reproduces the observed atmospheric response and its impact on the Atlantic Niño, further supporting the importance of prolonged ENSO forcing. The contrasting influence of multi-year and single-year events explains the fragile relationship between ENSO and the Atlantic Niño. An empirical orthogonal function (EOF) analysis shows that the leading EOF mode (EOF-1) for the spring tropical western to central Pacific SST anomalies captures the characteristics of multi-year ENSO events. EOF-1 is highly correlated with the summer Atlantic Niño over the past 113 years while the Niño-3 SST is not. These correlations indicate that ocean-atmosphere coupling in the equatorial western to central Pacific plays a major role in shaping ENSO teleconnections in boreal spring.

DOI： 10.1175/JCLI-D-18-0683.1
The Influence of Extratropical Ocean on the PNA Teleconnection: Role of Atmosphere-Ocean Coupling

Mori, M; Tokinaga, H; Kosaka, Y; Nakamura, H; Taguchi, B; Tatebe, H

GEOPHYSICAL RESEARCH LETTERS 51 ( 14 ) 2024.7 （ ISSN:0094-8276 eISSN:1944-8007 ）

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Publisher：Geophysical Research Letters

The Pacific/North American (PNA) pattern is a major low-frequency variability in boreal winter. A recent modeling study suggested that PNA variability increases through extratropical atmosphere-ocean coupling, but the effect was not fully extracted due to a particular experimental design. By comparing coupled and two sets of uncoupled large-ensemble global model simulations, here we show that the PNA-induced horseshoe-shaped sea-surface temperature (SST) anomaly in the North Pacific returns a non-negligible influence on the PNA itself. Its magnitude depends on the presence or absence of atmosphere-ocean coupling. The coupling accounts for ∼16% of the PNA variance, while the horseshoe-shaped SST anomaly explains only 5% under the uncoupled condition. The coupling reduces the damping of available potential energy by modulating turbulent heat fluxes and precipitation, magnifying the PNA variance. Precipitation processes in the extratropics as well as tropics are therefore important for realistically representing PNA variability and thereby regional weather and climate.

DOI： 10.1029/2024GL110234

Web of Science

Scopus
What determines the East Asian winter temperature during El Niño? - Role of the early-onset El Niño and tropical Indian Ocean warming Reviewed International journal

Shiozaki, M; Tokinaga, H; Mori, M

JOURNAL OF CLIMATE 37 ( 15 ) 4031 - 4043 2024.4 （ ISSN:0894-8755 eISSN:1520-0442 ）

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Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Journal of Climate

Atmospheric teleconnections from the Pacific El Niño are key to determining the East Asian winter climate. Using the database for policy decision-making for future climate change (d4PDF) large-ensemble simulations, the present study investigates a mechanism for the warm and cold East Asian winters during El Niño with a focus on atmospheric teleconnections triggered by anomalous sea surface temperature (SST) patterns in the tropical Indo-Pacific. Our results show that the western Pacific (WP) teleconnection pattern plays a primary role in the warm winters in East Asia. The WP pattern tends to appear in years when both an early El Niño and the positive phase of the Indian Ocean dipole (IOD) mode develop in boreal autumn. In those years, the tropical Indian Ocean (TIO) strongly warms in the following winter, forming a distinct zonal contrast in precipitation anomalies over the tropical Indo-Pacific through a reduced Walker circulation. The Rossby wave source anomalies indicate that the WP pattern is associated with the weakened Indo-Pacific Walker circulation. By contrast, the WP pattern does not dominate in the cold winters due to the absence of strong TIO warming. The present study proposes a mechanism that promotes the excitation of the WP pattern through the upper-troposphere divergence in East Asia associated with the Walker circulation modulated by the tropical Indo-Pacific interbasin interaction. SIGNIFICANCE STATEMENT: The East Asian winter temperature variability is controlled not only by the strong atmospheric internal variability in the midlatitudes and high latitudes but also by remote forcing from the tropical ocean. Our study investigates how El Niño exerts diverse impacts on the East Asian winter temperature, depending on where atmospheric convection intensifies in the tropical Pacific Ocean and the Indian Ocean. Our results show that an intense warming of the tropical Indian Ocean and the early development of El Niño are the major factors for warm winters in East Asia. Given that a precursor of the intense Indian Ocean warming appears in boreal autumn, our findings should contribute to the improvement of seasonal prediction for the East Asian winter climate.

DOI： 10.1175/JCLI-D-23-0627.1

Web of Science

Scopus

Repository Public URL： https://hdl.handle.net/2324/7179494
Northern Hemisphere winter atmospheric teleconnections are intensified by extratropical ocean-atmosphere coupling Reviewed International journal

Masato Mori, @Yu Kosaka, @Bunmei Taguchi, Hiroki Tokinaga, @Hiroaki Tatebe, @Hisashi Nakamura

Communications Earth & Environment 5 ( 1 ) 2024.3 （ eISSN:2662-4435 ）

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DOI： 10.1038/s43247-024-01282-1

Web of Science

Scopus

Repository Public URL： https://hdl.handle.net/2324/7178881
The tropical Atlantic as a negative feedback on ENSO Reviewed International journal

Ingo Richter, Yu Kosaka, Shoichiro Kido, Hiroki Tokinaga

Climate Dynamics 61 ( 1-2 ) 309 - 327 2022.11 （ ISSN:0930-7575 eISSN:1432-0894 ）

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DOI： 10.1007/s00382-022-06582-w

Web of Science

Scopus
Revisiting the tropical Atlantic influence on El Niño-Southern Oscillation Reviewed International journal

34 8533 - 8548 2021.11

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The influence of the tropical Atlantic on El Niño-Southern Oscillation (ENSO) is examined using sensitivity experiments with the SINTEX-F general circulation model with prescribed sea surface temperature (SST) distributions based on observations for the period 1982-2018. In the control experiment (CTRL) observed SSTs are prescribed over the global oceans; in the sensitivity experiment observed SSTs are prescribed in the tropical Atlantic only, while in other regions the climatological annual cycle is prescribed. A composite analysis of the model output suggests that cold SST events in the northern tropical Atlantic during boreal spring are associated with near-surface wind changes over the equatorial and subtropical Pacific that are conducive to the development of El Niño, consistent with previous studies. The amplitude of these changes, however, is at most 20% of those observed during typical El Niño events. Likewise, warm events in the equatorial Atlantic produce only about 10% of the wind changes seen in the western equatorial Pacific during the developing phase of typical La Niña events. Similar results are obtained from a partial regression analysis performed on an ensemble of atmosphere-only simulations from phase 6 of the Atmospheric Model Intercomparison Project (AMIP) although the equatorial Atlantic influence is stronger in AMIP. Further analysis of the AMIP models indicates that model biases do not have a major impact on the Atlantic-to-Pacific influence. Overall, the results suggest that the tropical Atlantic has a rather weak influence on ENSO development and mostly acts to modulate ongoing events rather than initiate them.

DOI： 10.1175/JCLI-D-21-0088.1

Repository Public URL： https://hdl.handle.net/2324/7179497
Multidecadal modulations of key metrics of global climate change Invited Reviewed International journal

N. C. Johnson, D. J. Amaya, Q. Ding, Y. Kosaka, H. Tokinaga, S.-P. Xie

Global and Planetary Change 2020.5

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Hydrological cycle changes under global warming and their effects on multiscale climate variability Invited Reviewed International journal

J. Ma, L. Zhou, G.R. Foltz, X. Qu, J. Ying, H. Tokinaga, C. R. Mechoso, J. Li, X. Gu

Annals of New York Academy of Sciences 2020.3

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Systematic scatterometer wind errors near coastal mountains Reviewed International journal

Earth and Space Science 6 ( 10 ) 1900 - 1914 2019.9

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DOI： 10.1029/2019EA000757
Eastern pacific ITCZ dipole and ENSO diversity Reviewed

Shang Ping Xie, Qihua Peng, Youichi Kamae, Xiao Tong Zheng, Hiroki Tokinaga, Dongxiao Wang

Journal of Climate 31 ( 11 ) 4449 - 4462 2018.6

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DOI： 10.1175/JCLI-D-17-0905.1
Early 20th-century Arctic warming intensified by Pacific and Atlantic multidecadal variability Reviewed

Hiroki Tokinaga, Shang Ping Xie, Hitoshi Mukougawa

Proceedings of the National Academy of Sciences of the United States of America 114 ( 24 ) 6227 - 6232 2017.6

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DOI： 10.1073/pnas.1615880114
Detecting cross-equatorial wind change as a fingerprint of climate response to anthropogenic aerosol forcing Reviewed

Hai Wang, Shang Ping Xie, Hiroki Tokinaga, Qinyu Liu, Yu Kosaka

Geophysical Research Letters 43 ( 7 ) 3444 - 3450 2016.4

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DOI： 10.1002/2016GL068521
Mechanisms and predictability of multiyear ecosystem variability in the North Pacific Reviewed

Megumi O. Chikamoto, Axel Timmermann, Yoshimitsu Chikamoto, Hiroki Tokinaga, Naomi Harada

Global Biogeochemical Cycles 29 ( 11 ) 2001 - 2019 2015.11

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DOI： 10.1002/2015GB005096
Interdecadal difference of interannual variability characteristics of South China Sea SSTs associated with ENSO Reviewed

Yali Yang, Shang Ping Xie, Yan Du, Hiroki Tokinaga

Journal of Climate 28 ( 18 ) 7145 - 7160 2015.9

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DOI： 10.1175/JCLI-D-15-0057.1
Cloud response to the meandering Kuroshio Extension front Reviewed

Hiroyuki Tomita, Shang Ping Xie, Hiroki Tokinaga, Yoshimi Kawai

Journal of Climate 26 ( 23 ) 9393 - 9398 2013.12

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DOI： 10.1175/JCLI-D-13-00133.1
Slowdown of the Walker circulation driven by tropical Indo-Pacific warming Reviewed

Hiroki Tokinaga, Shang Ping Xie, Clara Deser, Yu Kosaka, Yuko M. Okumura

Nature 491 ( 7424 ) 439 - 443 2012.11

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DOI： 10.1038/nature11576
Interdecadal variations in ENSO teleconnection to the Indo-Western Pacific for 1870-2007 Reviewed

J. S. Chowdary, Shang Ping Xie, Hiroki Tokinaga, Yuko M. Okumura, Hisayuki Kubota, Nat Johnson, Xiao Tong Zheng

Journal of Climate 25 ( 5 ) 1722 - 1744 2012.3

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DOI： 10.1175/JCLI-D-11-00070.1
Regional patterns of tropical indo-pacific climate change Evidence of the walker circulation weakening Reviewed

Hiroki Tokinaga, Shang Ping Xie, Axel Timmermann, Shayne McGregor, Tomomichi Ogata, Hisayuki Kubota, Yuko M. Okumura

Journal of Climate 25 ( 5 ) 1689 - 1710 2012.3

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DOI： 10.1175/JCLI-D-11-00263.1
Interannual variability of high-wind occurrence over the North Atlantic Reviewed

Xuhua Cheng, Shang Ping Xie, Hiroki Tokinaga, Yan Du

Journal of Climate 24 ( 24 ) 6515 - 6527 2011.12

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DOI： 10.1175/2011JCLI4147.1
Sea level pressure minimum along the Kuroshio and its extension Reviewed

Youichi Tanimoto, Tomohisa Kanenari, Hiroki Tokinaga, Shang Ping Xie

Journal of Climate 24 ( 16 ) 4419 - 4434 2011.8

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DOI： 10.1175/2011JCLI4062.1
Weakening of the equatorial Atlantic cold tongue over the past six decades Reviewed

Hiroki Tokinaga, Shang Ping Xie

Nature Geoscience 4 ( 4 ) 222 - 226 2011.4

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DOI： 10.1038/ngeo1078
Wave- and Anemometer-based sea surface wind (WASWind) for climate change analysis Reviewed

Hiroki Tokinaga, Shang Ping Xie

Journal of Climate 24 ( 1 ) 267 - 285 2011.1

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DOI： 10.1175/2010JCLI3789.1
Atmospheric effects of the Kuroshio large meander during 2004-05 Reviewed

Haiming Xu, Hiroki Tokinaga, Shang Ping Xie

Journal of Climate 23 ( 17 ) 4704 - 4715 2010.9

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DOI： 10.1175/2010JCLI3267.1
Atmospheric response to the Gulf Stream Seasonal variations Reviewed

Shoshiro Minobe, Masato Miyashita, Akira Kuwano-Yoshida, Hiroki Tokinaga, Shang Ping Xie

Journal of Climate 23 ( 13 ) 3699 - 3719 2010.7

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DOI： 10.1175/2010JCLI3359.1
Decadal shift in El Niño influences on Indo-western Pacific and East Asian climate in the 1970s Reviewed

23 ( 12 ) 3352 - 3368 2010.6

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El Niño's influence on the subtropical northwest (NW) Pacific climate increased after the climate regime shift of the 1970s. This is manifested in well-organized atmospheric anomalies of suppressed convection and a surface anticyclone during the summer (June-August) of the El Niño decay year [JJA(1)], a season when equatorial Pacific sea surface temperature (SST) anomalies have dissipated. In situ observations and ocean- atmospheric reanalyses are used to investigate mechanisms for the interdecadal change. During JJA(1), the influence of the El Niño-Southern Oscillation (ENSO) on the NW Pacific is indirect, being mediated by SST conditions over the tropical Indian Ocean (TIO). The results here show that interdecadal change in this influence is due to changes in the TIO response to ENSO. During the postregime shift epoch, the El Niño teleconnection excites downwelling Rossby waves in the south TIO by anticyclonic wind curls. These Rossby waves propagate slowly westward, causing persistent SST warming over the thermocline ridge in the southwest TIO. The ocean warming induces an antisymmetric wind pattern across the equator, and the anomalous northeasterlies cause the north Indian Ocean to warm through JJA(1) by reducing the southwesterly monsoon winds. The TIO warming excites a warm Kelvin wave in tropospheric temperature, resulting in robust atmospheric anomalies over the NW Pacific that include the surface anticyclone. During the preregime shift epoch, ENSO is significantly weaker in variance and decays earlier than during the recent epoch. Compared to the epoch after the mid-1970s, SST and wind anomalies over the TIO are similar during the developing and mature phases of ENSO but are very weak during the decay phase. Specifically, the southern TIO Rossby waves are weaker, so are the antisymmetric wind pattern and the North Indian Ocean warming during JJA(1). Without the anchor in the TIO warming, atmospheric anomalies over the NW Pacific fail to develop during JJA(1) prior to the mid-1970s. The relationship of the interdecadal change to global warming and implications for the East Asian summer monsoon are discussed.

DOI： 10.1175/2010JCLI3429.1
Stable volume and heat transports of the North Pacific subtropical gyre revealed by identifying the Kuroshio in synoptic hydrography south of Japan Reviewed

Akira Nagano, Kaoru Ichikawa, Hiroshi Ichikawa, Hiroyuki Tomita, Hiroki Tokinaga, Masanori Konda

Journal of Geophysical Research: Oceans 115 ( 9 ) 2010.1

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DOI： 10.1029/2009JC005747
Ocean frontal effects on the vertical development of clouds over the western North Pacific In situ and satellite observations Reviewed

Hiroki Tokinaga, Youichi Tanimoto, Shang Ping Xie, Takeaki Sampe, Hiroyuki Tomita, Hiroshi Ichikawa

Journal of Climate 22 ( 16 ) 4241 - 4260 2009.8

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DOI： 10.1175/2009JCLI2763.1
Ocean tidal cooling effect on summer sea fog over the Okhotsk Sea Reviewed

Hiroki Tokinaga, Shang Ping Xie

Journal of Geophysical Research Atmospheres 114 ( 14 ) 2009.7

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DOI： 10.1029/2008JD011477
Observations of marine atmospheric boundary layer transitions across the summer Kuroshio extension Reviewed

Youichi Tanimoto, Shang Ping Xie, Kohei Kai, Hideki Okajima, Hiroki Tokinaga, Toshiyuki Murayama, Masami Nonaka, Hisashi Nakamura

Journal of Climate 22 ( 6 ) 1360 - 1374 2009.4

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DOI： 10.1175/2008JCLI2420.1
Indian Ocean capacitor effect on Indo-Western pacific climate during the summer following El Niño Reviewed

22 ( 3 ) 730 - 747 2009.2

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Significant climate anomalies persist through the summer (June-August) after El Niño dissipates in spring over the equatorial Pacific. They include the tropical Indian Ocean (TIO) sea surface temperature (SST) warming, increased tropical tropospheric temperature, an anomalous anticyclone over the subtropical northwest Pacific, and increased mei-yu-baiu rainfall over East Asia. The cause of these lingering El Niño effects during summer is investigated using observations and an atmospheric general circulation model (GCM). The results herein indicate that the TIO warming acts like a capacitor anchoring atmospheric anomalies over the Indo-western Pacific Oceans. It causes tropospheric temperature to increase by a moistadiabatic adjustment in deep convection, emanating a baroclinic Kelvin wave into the Pacific. In the northwest Pacific, this equatorial Kelvin wave induces northeasterly surface wind anomalies, and the resultant divergence in the subtropics triggers suppressed convection and the anomalous anticyclone. The GCM results support this Kelvin wave-induced Ekman divergence mechanism. In response to a prescribed SST increase over the TIO, the model simulates the Kelvin wave with low pressure on the equator as well as suppressed convection and the anomalous anticyclone over the subtropical northwest Pacific. An additional experiment further indicates that the north Indian Ocean warming is most important for the Kelvin wave and northwest Pacific anticyclone, a result corroborated by observations. These results have important implications for the predictability of Indo-western Pacific summer climate: the spatial distribution and magnitude of the TIO warming, rather than simply whether there is an El Niño in the preceding winter, affect summer climate anomalies over the Indo-western Pacific and East Asia.

DOI： 10.1175/2008JCLI2544.1
Influence of mechanical mixing on a low summertime SST in the western North Pacific ITCZ region Reviewed

N. Sato, Hiroki Tokinaga, R. Shirooka, N. Suginohara

Geophysical Research Letters 33 ( 14 ) 2006.7

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DOI： 10.1029/2006GL025997
Atmospheric sounding over the winter Kuroshio Extension Effect of surface stability on atmospheric boundary layer structure Reviewed

Hiroki Tokinaga, Youichi Tanimoto, Masami Nonaka, Bunmei Taguchi, Tomohiro Fukamachi, Shang Ping Xie, Hisashi Nakamura, Tomowo Watanabe, Ichiro Yasuda

Geophysical Research Letters 33 ( 4 ) 2006.2

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DOI： 10.1029/2005GL025102
SST-induced surface wind variations over the Brazil-Malvinas confluence Satellite and in situ observations Reviewed

Hiroki Tokinaga, Youichi Tanimoto, Shang Ping Xie

Journal of Climate 18 ( 17 ) 3470 - 3482 2005.9

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DOI： 10.1175/JCLI3485.1
A fine view from space Reviewed

Shang Ping Xie, Masami Nonaka, Youichi Tanimoto, Hiroki Tokinaga, Haiming Xu, William S. Kessler, R. Justin Small, W. Timothy Liu, Jan Hafner

Bulletin of the American Meteorological Society 85 ( 8 ) 1060 - 1062 2004.8

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Seasonal transition of SST anomalies in the tropical Indian Ocean during El Niño and Indian Ocean dipole years Reviewed

82 ( 4 ) 1007 - 1018 2004.8

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We investigated seasonal transition of dominant modes of sea surface temperature anomalies (SSTAs) in the tropical Indian Ocean, analyzing the National Centers for Environmental Prediction/National Center for Atmospheric Research reanalysis products (NCEP/NCAR reanalyses), the Global sea-Ice and SST dataset (GISST2.3b), and the Simple Ocean Data Assimilation (SODA). During the coincidence years when the Indian Ocean Dipole (IOD) is followed by the major El Niño during boreal autumn-winter season, surface dipole structure in the tropical Indian Ocean tends to turn into the basinwide warm pattern in the November-December period. In contrast, the subsurface dipole keeps its structure from boreal autumn to winter. Such a surface-confined transition of SSTA is induced by latent heat flux anomalies in the eastern Indian Ocean. These latent heat flux anomalies are associated with changes in scalar wind speed anomalies. The zonal direction of climatological surface winds changes from easterly into westerly over the eastern Indian Ocean in November-December, while the anomalous Walker circulation during the El Niño induces easterly surface wind anomalies to persist there. As a result, deceleration of scalar wind speed takes place during boreal winter, and leads to warming of SST through suppressed evaporation. In addition to these latent heat flux anomalies, incoming solar radiation anomalies contribute to the net surface warming during this period. Furthermore, we discuss the role of the ocean dynamics for keeping the warm SSTAs in the western Indian Ocean.

DOI： 10.2151/jmsj.2004.1007
Bathymetric effect on the winter sea surface temperature and climate of the yellow and East China seas Reviewed

Shang Ping Xie, Jan Hafner, Youichi Tanimoto, W. Timothy Liu, Hiroki Tokinaga, Hairming Xu

Geophysical Research Letters 29 ( 24 ) 81 2002.12

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Baroclinic instability in high latitudes induced by polar vortex A connection to the arctic oscillation Reviewed

H. L. Tanaka, Hiroki Tokinaga

Journal of the Atmospheric Sciences 59 ( 1 ) 69 - 82 2002.1

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DOI： 10.1175/1520-0469(2002)059<0069:BIIHLI>2.0.CO;2

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Books

The Atlantic zonal mode: dynamics, thermodynamics, and teleconnections: Tropical and Extra-tropical Air-Sea Interactions, S.K.Behera, Ed.

Ingo Richter, Hiroki Tokinaga（ Role： Joint author）

Elsevier 2020.11

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Language：English Book type：Scholarly book

Presentations

Decadal variability of the Benguela Nino/Nina International conference

Hiroki Tokinaga

JpGU-AGU Joint Meeting 2020 2020.7

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Event date： 2020.7

Language：English

Country：Japan
Early 20th-century Arctic warming intensified by Pacific and Atlantic multidecadal variability Invited International conference

Hiroki Tokinaga, Shang-Ping Xie, Hitoshi Mukougawa

9th International Workshop on Tropical-subtropical Weather, Climate and Oceans 2017.11

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Event date： 2019.9

Language：English

Country：China
Atmospheric effects of the Gulf Stream and Kuroshio Extension Invited International conference

Hiroki Tokinaga, Shang-Ping Xie, Shoshiro Minobe

AGU Fall Meeting 2008.12

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Event date： 2019.9

Language：English Presentation type：Oral presentation (general)

Country：United States
A long, consistent surface wind dataset for climate change analysis: Application over the tropical Indo-Pacific International conference

Hiroki Tokinaga, Shang-Ping Xie

WCRP Open Science Conference 2011.10

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Event date： 2019.9

Language：English

Country：United States
Observed and simulated patterns of tropical Indo-Pacific climate change over the past six decades: Evidence of the Walker circulation slowdown Invited International conference

Hiroki Tokinaga, Shang-Ping Xie, Clara Deser, Yu Kosaka, Axel Timmermann, Shayne McGregor, Tomomichi Ogata, Hisayuki Kubota, Yuko M. Okumura

The 3rd International Conference on Earth System Modeling 2012.9

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Event date： 2019.9

Language：English

Country：Germany
熱帯太平洋およびインド洋における気候変化パターンの検出：Walker 循環の長期変化 Invited

時長宏樹

2012年度日本気象学会 2012.10

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Event date： 2019.9

Language：Japanese

Venue：札幌 Country：Japan
Regional patterns of tropical Indo-Pacific climate change: Evidence of the Walker Circulation weakening Invited International conference

Hiroki Tokinaga, Shang-Ping Xie, Axel Timmermann, Shayne McGregor, Tomomichi Ogata, Hisayuki Kubota, Yuko M. Okumura

AGU Fall Meeting 2012.12

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Event date： 2019.9

Language：English

Country：United States
大気海洋相互作用を伴う熱帯海洋の長期変化に関する研究 Invited

時長宏樹

2013年度日本海洋学会 2013.3

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Event date： 2019.9

Language：Japanese

Venue：東京 Country：Japan
Patterns and influence of tropical ocean warming: Observations and simulations Invited International conference

Hiroki Tokinaga

2nd JSPS Core-to-core International Workshop 2016.8

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Event date： 2019.9

Language：English

Country：Viet Nam
Exploring 6-month lead predictability of the Atlantic zonal mode in CMIP6 International conference

@Ingo Richter, @Tomoki Tozuka, @Yu Kosaka, @Shoichiro Kido, @Hiroki Tokinaga

EGU General Assenmbly 2024 2024.4

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Event date： 2024.4

Language：English Presentation type：Oral presentation (general)

Country：Austria
Future changes in tropical cyclone activity during the summer to fall season following El Niño Invited

日本気象学会秋季大会 2023.10

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Event date： 2023.10

Language：English Presentation type：Oral presentation (general)

Venue：Sendai Country：Japan
Western Pacific teleconnection-induced East Asian warm winter during El Niño: Role of the Indian Ocean warming International conference

2023.5

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Event date： 2023.5

Language：English Presentation type：Oral presentation (general)

Venue：Chiba Country：Japan
Future changes in tropical cyclone activity during the following summer-fall season of El Niño International conference

2023.5

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Event date： 2023.5

Language：English Presentation type：Oral presentation (general)

Venue：Chiba Country：Japan
Western Pacific teleconnection-induced East Asian warm winter during El Niño: Role of the Indian Ocean warming International conference

2023.4

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Event date： 2023.4

Language：English Presentation type：Oral presentation (general)

Venue：Pusan Country：Korea, Republic of
台風の発生と生涯最大強度位置に対する太平洋SST変動と地球温暖化の影響

@時長宏樹, @森正人, #原航太郎, #山口江聖

中緯度大気海洋相互作用 hotspot2研究集会 2023.3

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Event date： 2023.3

Language：Japanese Presentation type：Oral presentation (general)

Venue：九大伊都キャンパス Country：Japan
大気海洋結合による大気低周波変動モードの選択的増幅

@森正人, @小坂優, @田口文明, @時長宏樹, @建部洋晶

中緯度大気海洋相互作用 hotspot2研究集会 2023.3

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Event date： 2023.3

Language：Japanese Presentation type：Oral presentation (general)

Venue：九大伊都キャンパス Country：Japan
Extreme El Niño による大気テレコネクションの変調

#原航太郎, @時長宏樹, @森正人

異常気象研究会2022 2022.12

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Event date： 2022.12

Language：Japanese Presentation type：Oral presentation (general)

Venue：京都大学宇治キャンパス Country：Japan
エルニーニョ発生時におけるWPパターンの励起メカニズムとインド洋の寄与

@塩崎公大, @時長宏樹, @森正人

異常気象研究会2022 2022.12

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Event date： 2022.12

Language：Japanese Presentation type：Oral presentation (general)

Venue：京都大学宇治キャンパス Country：Japan
台風生涯最大強度の北偏化と地球温暖化の影響

#山口江聖, @森正人, @時長宏樹

異常気象研究会2022 2022.12

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Event date： 2022.12

Language：Japanese Presentation type：Oral presentation (general)

Venue：京都大学宇治キャンパス Country：Japan
エルニーニョ発生時におけるテレコネクションと極東域への影響

@塩崎公大, @時長宏樹, @森正人

日本気象学会2022年度秋季大会 2022.10

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Event date： 2022.10

Language：Japanese Presentation type：Oral presentation (general)

Venue：北海道大学 Country：Japan
International Research Cooperations in Climatic Hotspot2 project Invited International conference

@Hiroki Tokinaga, @Masami Nonaka, @Shoshiro Minobe

"Developing International Research Cooperations for the Kuroshio and its Related Studies", The Oceanographic Society of Japan 2022.9

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Event date： 2022.9

Language：English Presentation type：Oral presentation (general)

Country：Japan
WPパターンに対するインド洋昇温の影響

@塩崎公大, @時長宏樹, @森正人

日本気象学会 2022年度春季大会 2022.5

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Event date： 2022.5

Language：Japanese Presentation type：Oral presentation (general)

Venue：オンライン開催 Country：Japan
The extraordinary Atlantic Nino of 2019/2020 International conference

Ingo Richter, Hiroki Tokinaga, Yuko M. Okumura

PIRATA Meeting 2022.5

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Event date： 2022.5

Language：English

Country：Other
The influence of the tropical Indian Ocean warming on the Western Pacific teleconnection pattern International conference

@Shiozaki Masahiro, @Hiroki Tokinaga, @Masato Mori

JpGU Meeting 2022 2022.5

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Event date： 2022.5

Language：English Presentation type：Oral presentation (general)

Country：Japan
Evaluation of the Pacific Decadal Oscillation in the HighResMIP-PRIMAVERA model simulations International conference

@Hiroki Tokinaga, @Shoshiro Minobe, @Youichi Tanimoto, @Malcolm Roberts

JpGU Meeting 2022 2022.5

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Event date： 2022.5

Language：English Presentation type：Oral presentation (general)

Country：Japan
Reexamining the tropical Atlantic influence on ENSO in perfect model prediction experiments International conference

@Ingo Richter, @Yu Kosaka, @Hiroki Tokinaga, @Shoichiro Kido

JpGU Meeting 2022 2022.5

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Event date： 2022.5

Language：English Presentation type：Oral presentation (general)

Country：Japan
Is equatorial Atlantic variability resurging? International conference

@Ingo Richter, @Hiroki Tokinaga, @Yuko Okumura, @Noel Keenlyside

EGU General Assembly 2022 2022.5

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Event date： 2022.5

Language：English Presentation type：Oral presentation (general)

Country：Austria
太平洋十年規模変動の気候影響 Invited

時長宏樹

第43回日本気象学会九州支部発表会 2022.3

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Event date： 2022.3

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

Venue：オンライン Country：Japan
Using perfect model prediction experiments to quantify the tropical Atlantic influence on ENSO Invited International conference

Ingo Richter, Yu Kosaka, Hiroki Tokinaga, Takahito Kataoka

AGU Fall Meeting 2021.12

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Event date： 2021.12

Language：English Presentation type：Oral presentation (general)

Country：United States
Is equatorial Atlantic variability resurging? Invited

Ingo Richter, Hiroki Tokinaga, Yuko M. Okumura

11th International Conference on Tropical Marine Environmental Changes (MEC 2021) 2021.11

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Event date： 2021.11

Language：English Presentation type：Oral presentation (general)

Country：China
ENSO発生時における2種類の冬季遠隔影響 -d4PDFを用いた評価-

塩崎公大, 榎本剛, 高谷康太郎, 時長宏樹, 森正人

京都大学防災研究所異常気象研究会 2021.11

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Event date： 2021.11

Language：Japanese Presentation type：Oral presentation (general)

Venue：オンライン Country：Japan
Recent resurgence of equatorial Atlantic variability International conference

Ingo Richter, Hiroki Tokinaga, Yuko M. Okumura

3rd APL-FIO Workshop on Southern Hemisphere Ocean and Climate Variability 2021.9

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Event date： 2021.9

Language：English

Country：Japan
熱帯太平洋-大西洋海盆間相互作用の長期変動 Invited

@時長宏樹

大槌シンポジウム 2021.7

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Event date： 2021.7

Language：Japanese Presentation type：Oral presentation (general)

Venue：オンライン Country：Japan
An evaluation of the performance of CMIP6 models in the tropical Atlantic: mean state, variability, and remote impacts International conference

Ingo Richter, Hiroki Tokinaga

JpGU Meeting 2020.7

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Event date： 2021.6

Language：English Presentation type：Oral presentation (general)

Country：Japan
Role of surface heat flux in Pacific decadal variability: Observations and CMIP6/HighResMIP climate coupled models International conference

Hiroki Tokinaga, Shoshiro Minobe, Youichi Tanimoto, Malcolm Roberts

International Workshop for Mid-latitude Air-Sea Interaction 2021.6

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Event date： 2021.6

Language：English Presentation type：Oral presentation (general)

Country：Japan
An assessment of the tropical Atlantic influence on El Nino-Southern Oscillation International conference

Ingo Richter, Hiroki Tokinaga, Yu Kosaka, Takeshi Doi, Takahito Kataoka

JpGU Meeting 2021.5

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Event date： 2021.5

Language：English Presentation type：Oral presentation (general)

Country：Japan
Reexamining the tropical Atlantic influence on ENSO using perfect model predictability experiments International conference

Ingo Richter, Yu Kosaka, Hiroki Tokinaga, Shoichiro Kido

EGU General Assembly 2021.4

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Event date： 2021.4

Language：English Presentation type：Oral presentation (general)

Country：Other
An experimental protocol to examine the link between the tropical Atlantic and ENSO International conference

Ingo Richter, Yu Kosaka, Hiroki Tokinaga, Takahito Kataoka

WCRP-CLIVAR Workshop on Climate Interactions among the Tropical Basins 2021.2

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Event date： 2021.2

Language：English

Country：Japan
Revisiting the tropical Atlantic influence on ENSO International conference

Ingo Richter, Hiroki Tokinaga, Takahito Kataoka, Yu Kosaka, Takeshi Doi

AGU Fall Meeting 2020.12

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Event date： 2020.12

Language：English Presentation type：Oral presentation (general)

Country：United States
Impact of springtime cross-equatorial SST gradient on the Atlantic Nino/Nina International conference

Takaaki Yokoi, Hiroki Tokinaga

JpGU-AGU Joint Meeting 2020 2020.7

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Event date： 2020.7

Language：English

Country：Japan
Evaluating the performance of CMIP6 models in the tropical Atlantic: mean state, variability, and remote impacts International conference

Ingo Richter, Hiroki Tokinaga

EGU General Assembly 2020 2020.5

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Event date： 2020.5

Language：English Presentation type：Oral presentation (general)

Country：Other
On the acceleration of ENSO decay by northern tropical Atlantic SST anomalies International conference

Ingo Richter, Hiroki Tokinaga, Yu Kosaka, Takeshi Doi

Ocean Sciences Meeting 2020.2

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Event date： 2020.2

Language：English Presentation type：Oral presentation (general)

Country：United States
Dynamics of Climate Response to Anthropogenic Aerosol Forcing: From Global to Regional Scale International conference

Hai Wang, Shang-Ping Xie, Yu Kosaka, Qinyu Liu, Hiroki Tokinaga, Yan Du

AGU Fall Meeting 2019 2019.12

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Event date： 2019.12

Language：English Presentation type：Oral presentation (general)

Country：United States
SST anomalies in the northern tropical Atlantic as a negative feedback to ENSO development International conference

Ingo Richter, Hiroki Tokinaga, Yu Kosaka, Takeshi Doi

JpGU meeting 2019 2019.5

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Event date： 2019.5

Language：English Presentation type：Oral presentation (general)

Country：Japan

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MISC

研究集会「季節予測システムの進展と異常気象の要因分析」の報告

小林ちあき, 上田学, 竹村和人, 若松俊哉, 小守信正, 時長宏樹, 野口峻佑, 榎本剛

天気 2019.6

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Language：Japanese Publishing type：Internal/External technical report, pre-print, etc.
エルニーニョ/南方振動の持続性と大西洋ニーニョ現象

時長　宏樹, Ingo Richter, 小坂優

平成30年度「異常気象と長期変動」研究集会報告 2019.3

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Language：Japanese Publishing type：Internal/External technical report, pre-print, etc.
研究集会「東アジア域における大気循環の季節内変動に関する研究集会」の報告

西憲敬, 高谷祐平, 原田やよい, 時長宏樹, 竹村和人, 宮坂貴文, 榎本剛

天気 2017.6

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Language：Japanese Publishing type：Internal/External technical report, pre-print, etc.
20世紀前半の北極圏温暖化に対する太平洋・大西洋数十年規模変動の影響

時長宏樹, 謝尚平, 向川均

平成28年度「異常気象と長期変動」研究集会報告 2017.3

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Language：Japanese Publishing type：Internal/External technical report, pre-print, etc.
インド洋ダイポールモードと海盆モード

時長宏樹, 小坂優, 謝尚平

天気 2011.3

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Language：Japanese Publishing type：Article, review, commentary, editorial, etc. (scientific journal)
Local and remote influences of the Kuroshio Extension on the atmosphere

Hiroki Tokinaga, Shang-Ping Xie, Fumiaki Kobashi, Youichi Tanimoto

U. S. CLIVAR Variations 2009.12

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Language：English Publishing type：Article, review, commentary, editorial, etc. (scientific journal)
夏季黒潮続流上における海洋性大気境界層の変質過程

谷本陽一, 謝尚平, 甲斐浩平, 時長宏樹, 岡島秀樹, 村山利幸, 野中正見, 中村尚

月刊海洋 2008.8

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Language：Japanese Publishing type：Internal/External technical report, pre-print, etc.
黒潮続流域における衛星データを用いた海上大気比湿の推定

富田裕之, 時長宏樹, 谷本陽一

月刊海洋 2008.8

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Language：Japanese Publishing type：Internal/External technical report, pre-print, etc.
黒潮続流温度前線周辺における海面熱フラックス変動の観測について

根田昌典, 市川洋, 永野憲, 富田裕之, 時長宏樹, 安田一郎

2008.8

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Language：Japanese Publishing type：Internal/External technical report, pre-print, etc.
冬季黒潮続流域で観測された大気境界層の変動

小橋史明, 谷本陽一, 岩坂直人, 村山利幸, 野中正見, 時長宏樹, 根田昌典

月刊海洋 2008.8

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Language：Japanese Publishing type：Internal/External technical report, pre-print, etc.
黒潮続流域における大気直接観測

谷本陽一, 時長宏樹, 甲斐浩平

月刊海洋 2006.5

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Language：Japanese Publishing type：Internal/External technical report, pre-print, etc.
エルニーニョ発生時におけるWPパターンの励起メカニズムとインド洋の寄与

@塩崎公大, @時長宏樹, @森正人

令和4年度「異常気象と長期変動」研究集会報告 2023.3

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Language：Japanese Publishing type：Internal/External technical report, pre-print, etc.
台風生涯最大強度の北偏化と地球温暖化の影響

#山口江聖, @森正人, @時長宏樹

令和4年度「異常気象と長期変動」研究集会報告 2023.3

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Language：Japanese Publishing type：Internal/External technical report, pre-print, etc.
Extreme El Niñoによる大気テレコネクションの変調

#原航太郎, @時長宏樹, @森正人

令和4年度「異常気象と長期変動」研究集会報告 2023.3

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Language：Japanese Publishing type：Internal/External technical report, pre-print, etc.

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Works

Wave and Anemometer-based Sea Surface Wind (WASWind) dataset

Hiroki Tokinaga, Shang-Ping Xie

2011.1

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Other Link： https://www.riam.kyushu-u.ac.jp/oed/tokinaga/waswind.html

Professional Memberships

Japan Geoscience Union
The Oceanographic Society of Japan
The Meteorological Society of Japan
American Geophysical Union
American Meteorological Society

Committee Memberships

日本海洋学会論文賞受賞候補者選考委員会委員 Domestic

2024.4 - 2026.3
日本海洋学会論文賞受賞候補者選考委員会委員 Domestic

2020.4 - 2022.3
日本気象学会第40期山本賞候補者推薦委員会委員 Domestic

2018.9 - 2020.5
日本学術会議環境学委員会・地球惑星科学委員会合同　FE・WCRP合同分科会CLIVARI小委員会委員 Domestic

2018.4 - Present
日本地球惑星科学連合代議員 Domestic

2018.4 - 2024.3

Academic Activities

共同コンビーナ

日本海洋学会2023年度秋季大会（京都大学） 2023.9

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Type：Competition, symposium, etc.
共同コンビーナ International contribution

2023.5

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Type：Competition, symposium, etc.
Screening of academic papers

Role(s)： Peer review

2023

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Type：Peer review

Number of peer-reviewed articles in foreign language journals：5
Screening of academic papers

Role(s)： Peer review

2022

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Type：Peer review

Number of peer-reviewed articles in foreign language journals：4
共同コンビーナ

日本海洋学会2022年度秋季大会（名古屋大学 (オンライン) ） 2021.9

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Type：Competition, symposium, etc.
共同コンビーナ

日本海洋学会2021年度秋季大会（オンライン） 2021.9

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Type：Competition, symposium, etc.
代表コンビーナ International contribution

2021.5

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Type：Competition, symposium, etc.
Screening of academic papers

Role(s)： Peer review

2021

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Type：Peer review

Number of peer-reviewed articles in foreign language journals：5
共同コンビーナ

日本海洋学会2020年度秋季大会 2020.11

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Type：Competition, symposium, etc.
共同コンビーナ International contribution

2020.7

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Type：Competition, symposium, etc.
共同コンビーナ

日本海洋学会2019年度秋季大会（富山） 2019.9

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Type：Competition, symposium, etc.
共同コンビーナ International contribution

2019.5

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Type：Competition, symposium, etc.

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Research Projects

ハビタブル日本の統括と推進

2024.4 - 2029.3

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Authorship：Coinvestigator(s)
熱帯・極域と双方向作用する中緯度域の気候変動と将来変化

2024.4 - 2029.3

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Authorship：Principal investigator
過去から将来の熱帯太平洋大気海洋系のパターン変化に対する統合的理解と予測

2024.4 - 2028.3

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Authorship：Coinvestigator(s)
Extratropical climate variability and change bi-directionally interacting with the tropics and polar regions

Grant number：24H02229 2024 - 2028

Japan Society for the Promotion of Science・Ministry of Education, Culture, Sports, Science and Technology Grants-in-Aid for Scientific Research Grant-in-Aid for Transformative Research Areas (A)

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Authorship：Principal investigator Grant type：Scientific research funding

CiNii Research
Supervision and promotion of Habitable Japan

Grant number：24H02220 2024 - 2028

Japan Society for the Promotion of Science・Ministry of Education, Culture, Sports, Science and Technology Grants-in-Aid for Scientific Research Grant-in-Aid for Transformative Research Areas (A)

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Authorship：Coinvestigator(s) Grant type：Scientific research funding

CiNii Research
Predictive understanding of warming patterns in the tropical Pacific atmosphere-ocean system from the past to the future

Grant number：24H00261 2024 - 2027

Japan Society for the Promotion of Science Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (A)

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Authorship：Coinvestigator(s) Grant type：Scientific research funding

CiNii Research
A data-driven modeling approach for augmenting climate model simulations and its application to Pacific-Atlantic interbasin interactions International coauthorship

2023.4 - 2027.3

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Authorship：Coinvestigator(s)
A data-driven modeling approach for augmenting climate model simulations and its application to Pacific-Atlantic interbasin interactions

Grant number：23H01250 2023 - 2026

Japan Society for the Promotion of Science Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (B)

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Authorship：Coinvestigator(s) Grant type：Scientific research funding
Tropical Basin Interaction International coauthorship

2020.1 - 2024.12

WCRP/CLIVAR

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Authorship：Coinvestigator(s)
中緯度域の気候変動と将来予測の不確実性

2019.6 - 2024.3

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Authorship：Coinvestigator(s)
Uncertainties of climate variability and change and future projection in mid-latitudes

Grant number：19H05704 2019 - 2023

Japan Society for the Promotion of Science・Ministry of Education, Culture, Sports, Science and Technology Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research on Innovative Areas

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Authorship：Coinvestigator(s) Grant type：Scientific research funding

CiNii Research
大気海洋系内の熱フローの理解に立脚した地球温暖化の加速・減速の要因解明

2018.4 - 2022.3

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Authorship：Coinvestigator(s)
大西洋・太平洋熱帯域における海盆間大気海洋相互作用のミッシングリンク解明

2018.4 - 2022.3

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Authorship：Principal investigator
大西洋・太平洋熱帯域における海盆間大気海洋相互作用のミッシングリンク解明

Grant number：18H01281 2018 - 2021

日本学術振興会科学研究費助成事業基盤研究(B)

時長宏樹, RICHTER INGO, 小坂優

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Authorship：Principal investigator Grant type：Scientific research funding

本研究では、観測データ解析、CMIP気候モデルのマルチモデル相互比較解析、数値モデル実験等を総合的に実施し、経年から数十年規模の熱帯大西洋-太平洋間相互作用の要因とその気候影響を調べ、計22編の査読付関連論文 (うち15編が国際共著論文) を発表し、国内外の学会等でも研究成果を発表してきた。2022年2月には本研究成果のプレスリリースを行ったことに加え、2020年にClimate Dynamics に掲載された論文は Top10% 論文にランクするなど、国際的にも顕著な業績を残したと言える。

CiNii Research
大気海洋系内の熱フローの理解に立脚した地球温暖化の加速・減速の要因解明

Grant number：18H03726 2018 - 2021

日本学術振興会科学研究費助成事業基盤研究(A)

谷本陽一, 富田裕之, 細田滋毅, 時長宏樹, 野中正見, 植原量行

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Authorship：Coinvestigator(s) Grant type：Scientific research funding

本研究では、大気から海洋への長期的な全球規模の熱吸収に海洋中規模渦が果たす役割を明らかにするため、黒潮続流南方の冷水渦に対し海洋プロファイリングフロートを捕捉させ、冷水渦領域における水温プロファイルの時間変化の観測にはじめて成功した。観測された水温プロファイルは、晩冬から早春にかけて海洋亜表層の昇温を示し、この昇温は大気との熱交換が浅い海洋混合層に限定される初夏においても維持されることを見出した。これらの観測事実は、冷水渦領域で海面から混合層に吸収された熱が、大気と直接熱交換できない海洋亜表層に取り込まれ、全球規模の海洋熱吸収に寄与する事を示唆する。

CiNii Research
20世紀前半に起こった北極温暖化の要因解明

2016.4 - 2018.3

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Authorship：Principal investigator
20世紀前半に起こった北極温暖化の要因解明

Grant number：16K17802 2016 - 2017

科学研究費助成事業若手研究(A,B)

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Authorship：Principal investigator Grant type：Scientific research funding
20世紀全球海上風データセットの作成と気候変化研究への応用

2014.8 - 2016.3

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Authorship：Principal investigator
20世紀全球海上風データセットの作成と気候変化研究への応用

Grant number：26887023 2014 - 2015

日本学術振興会科学研究費助成事業研究活動スタート支援

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Authorship：Principal investigator Grant type：Scientific research funding
Interannual variability of ocean vector winds near ocean fronts and coastal orography

2010.7 - 2014.6

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Authorship：Coinvestigator(s)
Interannual variability of ocean vector winds near ocean fronts and coastal orography

2010 - 2014

Grants-in-Aid for Scientific Research

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Authorship：Coinvestigator(s) Grant type：Competitive funding other than Grants-in-Aid for Scientific Research
黒潮および黒潮続流上の熱放出に対する大気循環変動特性の解明

2006.4 - 2007.9

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Authorship：Principal investigator
黒潮および黒潮続流上の熱放出に対する大気循環変動特性の解明

Grant number：18740307 2006 - 2007

科学研究費助成事業若手研究(A,B)

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Authorship：Principal investigator Grant type：Scientific research funding

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Educational Activities

Descriptive Marine Physics/Earth System Science and Technology/Interdisciplinary Graduate School of Engineering Sciences

Class subject

海洋流体力学II

2024.6 - 2024.8 Summer quarter
大気と海洋の環境学入門Ｂ

2024.6 - 2024.8 Summer quarter
総合理工学セミナーF

2024.4 - 2025.3 Full year
海洋流体力学I

2024.4 - 2024.6 Spring quarter
大気と海洋の環境学入門Ｂ

2023.6 - 2023.8 Summer quarter
総合理工学セミナーF

2023.4 - 2024.3 Full year
総合理工学修士演習

2023.4 - 2024.3 Full year
総合理工学修士実験

2023.4 - 2024.3 Full year
海洋観測実習

2023.4 - 2023.9 First semester
地球惑星科学特別講義IV (海洋物理学)

2022.12 - 2023.2 Winter quarter
地球惑星科学特別講義III (海洋物理学)

2022.10 - 2022.12 Fall quarter
大気と海洋の環境学入門Ｂ

2022.6 - 2022.8 Summer quarter
総合理工学修士演習

2022.4 - 2023.3 Full year
総合理工学修士実験

2022.4 - 2023.3 Full year
総合理工学セミナーF

2022.4 - 2023.3 Full year
大気海洋相互作用II

2021.12 - 2022.2 Winter quarter
大気海洋相互作用I

2021.10 - 2021.12 Fall quarter
大気と海洋の環境学入門Ｂ

2021.6 - 2021.8 Summer quarter
海洋環境解析学セミナー

2021.4 - 2022.3 Full year
大気海洋環境システム学特別研究

2021.4 - 2022.3 Full year
大気と海洋の環境学入門Ｂ

2020.6 - 2020.8 Summer quarter
大気海洋環境システム学特別研究

2020.4 - 2021.3 Full year
海洋環境解析学セミナー

2020.4 - 2021.3 Full year
大気と海洋の環境学入門Ｂ

2019.6 - 2019.8 Summer quarter
大気海洋環境システム学特別研究

2019.4 - 2020.3 Full year
海洋環境解析学セミナー

2019.4 - 2020.3 Full year

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Visiting, concurrent, or part-time lecturers at other universities, institutions, etc.

2024 福岡大学理学部 Classification:Intensive course Domestic/International Classification:Japan
2022 福岡大学理学部 Classification:Intensive course Domestic/International Classification:Japan
2020 北海道大学大学院環境科学院地球圏科学専攻 Classification:Intensive course Domestic/International Classification:Japan

Participation in international educational events, etc.

2020.12

Interdisciplinary Graduate School of Engineering Science, Kyushu University

22nd Cross Straits Symposium on Energy and Environmental Science and Technology

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Venue：オンライン
2020.8

上海交通大学

ESST CAMPUS Asia 2020 Summer School

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Venue：オンライン

Outline of Social Contribution and International Cooperation activities

気候変動及び予測可能性研究計画（CLIVAR) に新しく設立された研究焦点である Tropical Basin Interaction にメンバーとして参画し、熱帯海盆間相互作用に関する国際共同研究を進めている。

Social Activities

第9回海の科学講座 in 九州「海と大気の熱い関係から紐解く気候変動」

福岡管区気象台、九州大学応用力学研究所、水産研究・教育機構、水産資源研究所オンライン 2023.8

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Audience： General,　Scientific,　Company,　Civic organization,　Governmental agency

Type：Lecture

「地球温暖化」と聞けば、地球の至る所で温度が上昇すると思うかもしれません。しかし、その温度の上がり具合は世界的に見ると場所によって大きく異なります。また、地球温暖化の影響は、温度だけにとどまらず、海流や海面高度、さらには雨や風など、海と大気の様々な物理過程に影響を及ぼします。これらの将来変化には、海と大気の相互作用が重要な役割を果たしているのです。本講座では、過去の観測データやIPCC第6次評価報告書における気候モデルの数値シミュレーション結果などを紹介し、気候の将来変化における海の役割を解説します。
第37回夏季大学「熱帯太平洋が引き起こす気候変動」

日本気象学会関西支部京都テルサ, 京都市 2015.8

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Audience： General,　Scientific,　Company,　Civic organization,　Governmental agency

Type：Lecture
第12回海のサイエンスカフェ「激動する熱帯太平洋とアジアの気候」～過去100年の航海から読む気候の歴史〜

日本海洋学会教育問題研究会三省堂札幌店ブックス＆カフェ UCC, 札幌市 2013.9

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Audience： General,　Scientific,　Company,　Civic organization,　Governmental agency

Type：Lecture

Media Coverage

赤道大西洋東部の異常昇温 -局所的な海上風変化が原因- Newspaper, magazine

科学新聞 2022.3

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赤道大西洋東部の異常昇温 -局所的な海上風変化が原因-

Activities contributing to policy formation, academic promotion, etc.

2022.4 - 2026.3 情報・システム研究機構国立極地研究所

南極観測アドバイザー
2022.4 - 2024.12 WCRP/CLIVAR

WCRP/CLIVAR Research Foci 共同メンバー
2021.4 - 2022.3 WCRP/CLIVAR

WCRP/CLIVAR Research Foci 共同メンバー
2020.4 - 2021.3 WCRP/CLIVAR

WCRP/CLIVAR Research Foci 共同メンバー
2015.10 - 2025.3 気象庁異常気象分析作業部会

気象庁異常気象分析作業部会委員

Travel Abroad

2016.2 - 2016.3

Staying countory name 1：United States Staying institution name 1：Scripps Institution of Oceanography

Staying institution name 2：UC San Diego
2012.9 - 2014.3

Staying countory name 1：United States Staying institution name 1：International Pacific Research Center

Staying institution name 2：University of Hawaii at Manoa
2009.9 - 2012.8

Staying countory name 1：United States Staying institution name 1：International Pacific Research Center

Staying institution name 2：University of Hawaii at Manoa
2007.10 - 2009.8

Staying countory name 1：United States Staying institution name 1：International Pacific Research Center

Staying institution name 2：University of Hawaii at Manoa