HIROKI TOKINAGA

Research Institute for Applied Mechanics, Kyushu University
6-1 Kasuga-koen, Kasuga, Fukuoka, 816-8580 Japan
Tel: +81-92-583-7240, Fax: +81-92-584-2570
E-mail: tokinaga@riam.kyushu-u.ac.jp, Web: http://www.riam.kyushu-u.ac.jp/oed/tokinaga/
Publons: https://publons.com/researcher/2684710/hiroki-tokinaga/

Education
Hokkaido University, Japan
2002 – 2005
Ph.D. in Environmental Earth Science
Dissertation title: “Lower atmospheric response to the extratropical ocean fronts”
Hokkaido University, Japan
2000 – 2002
M.S. in Environmental Earth Science
Thesis title: “Seasonal linkage between the Indian Ocean Dipole and ocean-atmosphere variability over the tropical Pacific”
University of Tsukuba, Japan
1996 – 2000
B.S. in Geoscience
Thesis title: “Interaction between baroclinic instability waves and polar vortex associated with the Arctic Oscillation”

Professional Experience
Research Institute for Applied Mechanics, Kyushu University, Kasuga, Fukuoka, Japan
Professor
Hakubi Center for Advanced Research, Kyoto University, Kyoto, Japan
Associate Professor
International Pacific Research Center, Honolulu, HI, USA
Assistant Researcher
Visiting Assistant Researcher
Postdoctoral Fellow
Japan Agency for Marine-Earth Science and Technology, Yokosuka, Japan
Postdoctoral Fellow
Hokkaido University, Sapporo, Japan
Research Assistant2019-present
2014 – 20192012 – 20142009 – 20122007 – 20092005 – 2007
2002 – 2005

HonorsThe Young Scientists’ Prize of "Commendations for Science and Technology” from the Japan Ministry of Education,
Culture, Sports, Science and Technology, 2015.
The Okada prize from the Oceanographic Society of Japan, 2013.
The Yamamoto-Shyono Medal from Society of Japan for the 2012 Journal of Climate paper entitled “Regional patterns oftropical Indo-Pacific climate change: Evidence of the Walker Circulation weakening”, 2012.

Professional Memberships
American Meteorological Society
American Geophysical Union
Meteorological Society of Japan
Oceanographic Society of Japan
Japan Geoscience Union

2008 – present
2002 – present
2000 – present
2004 – present2017 – present

ServiceReviewer for Nature, Nature Climate Change, Scientific Reports, Journal of Climate, Climate Dynamics, Quart. J. Roy.

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Meteor. Soc., Monthly Weather Review, Journal of Geophysical Research-Oceans, Journal of GeophysicalResearch-Atmosphere, Geophysical Research Letters, Journal of the Meteorological Society Japan, Journal ofOceanography, SOLA, Advances in Space Research, Pacific Science, and National Science Fundation
Session convener for Asia Oceania Geosciences Society-American Geophysical Union Joint Assembly (2012), Japan
Geoscience Union Meeting (2013-2016), The Oceanographic Society of Japan Fall Meeting (2016)

Publications
1. Tokinaga, H., I. Richter and Y. Kosaka, 2019: ENSO influence on the Atlantic Niño, revisited: Multi-year versus
single-year ENSO events, J. Climate, in press, doi:10.1175/JCLI-D-18-0683.1.
2. Xie, S.-P., Q. Peng, Y. Kamae, X.T. Zheng, H. Tokinaga, and D. Wang, 2018: Eastern Pacific ITCZ dipole and ENSO
diversity, J. Climate, 31, 4449–4462.
3. Wang, H., S.-P. Xie, H. Tokinaga, Q. Liu and Y. Kosaka, 2016: Detecting cross-equatorial wind change as afingerprint of climate response to anthropogenic aerosol forcing. Geophys. Res. Lett., 43,
doi:10.1002/2016GL068521.
4. Chikamoto, M. O., A. Timmermann, Y. Chikamoto, H. Tokinaga, and N. Harada, 2015: Mechanisms andpredictability of multiyear ecosystem variability in the North Pacific. Global Biogeochem. Cycles, 29, 2001–2019,
doi:10.1002/2015GB005096.
5. Yang, Y., S.-P. Xie, Y. Du, H. Tokinaga, 2015: Interdecadal difference of interannual variability characteristics ofSouth China Sea SSTs associated with ENSO. J. Climate, 28, 7145-7160.
6. Tomita, H., S.-P. Xie, H. Tokinaga, and Y. Kawai, 2013: Cloud response to the meandering Kuroshio Extension
front. J. Climate, 26, 9393-9398.
7. Tokinaga, H., S.-P. Xie, C. Deser, Y. Kosaka and Y. M. Okumura, 2012: Slowdown of the Walker circulation driven bytropical Indo-Pacific warming. Nature, 491, 439-443, doi: 10.1038/nature11576.
8. Tokinaga, H., S.-P. Xie, A. Timmermann, S. McGregor, T. Ogata, H. Kubota, and Y. M. Okumura, 2012: Regional
patterns of tropical Indo-Pacific climate change: Evidence of the Walker Circulation weakening. J. Climate, 25,1689-1710.
(This paper has been highlighted in Nature Geoscience and awarded as the 2012 Yamamoto-Shyono Medal from
the Meteorological Society of Japan)
9. Chowdary, J. S., S.-P. Xie, H. Tokinaga, , Y. M. Okumura, H. Kubota, N. C. Johnson, and X.-T. Zheng, 2012:
Inter-decadal variations in ENSO teleconnection to the Indo-western Pacific for 1870-2007. J. Climate, 25, 1722-1744.
10. Tokinaga, H., and S.-P. Xie, 2011: Weakening of the equatorial Atlantic cold tongue over the past six decades. NatureGeosci., 4, 222-226, doi:10.1038/ngeo1078.
11. Tokinaga, H., and S.-P. Xie, 2011: Wave and Anemometer-based Sea-surface Wind (WASWind) for climate change
analysis. J. Climate, 24, 267-285.
12. Cheng, X., S.-P. Xie, H. Tokinaga, and Y. Du, 2011: Interannual variability of high-wind occurrence over the North
Atlantic. J. Climate, 24, 6515-6527.
13. Tanimoto, Y., T. Kanenari, H. Tokinaga, and S.-P. Xie, 2011: Sea level pressure minimum along the Kuroshio and its
extension. J. Climate, 4419-4434.
14. Xu, H., H. Tokinaga, and S.-P. Xie, 2010: Atmospheric effects of the Kuroshio large meander during 2004-05. J. Climate,23, 4704-4715.
15. Nagano, A., K. Ichikawa, H. Ichikawa, H. Tomita, H. Tokinaga, and M. Konda, 2010: Stable volume and heat transportsof the North Pacific subtropical gyre reveled by identifying the Kuroshio water in synoptic hydrography south ofJapan, J. Geophys. Res.-Oceans, 115, doi:10.1029/2009JC005747.
16. Minobe, S., A. Kuwano-Yoshida, M. Miyashita, H. Tokinaga, and S.-P. Xie, 2010: Atmospheric response to the Gulf
Stream: Seasonal variations. J. Climate, 23, 3699-3719.
17. Xie, S.-P., Y. Du, G. Huang, X.-T. Zheng, H. Tokinaga, K. Hu, and Q. Liu, 2010: Decadal shift in El Nino influences on
Indo-western Pacific and East Asian climate in the 1970s. J. Climate, 23, 3352-3368.
18. Tokinaga, H., and S.-P. Xie, 2009: Ocean tidal cooling effect on summer sea fog over the Okhotsk Sea. J. Geophys.
Res.-Atmos., D14102, doi:10.1029/2008JD011477.

219. Tokinaga, H., Y. Tanimoto, S.-P. Xie, T. Sampe, H. Tomita, and H. Ichikawa, 2009: Ocean frontal effects on the verticaldevelopment of clouds over the western North Pacific: In situ and satellite observations. J. Climate, 22, 4241-4260.
20. Tanimoto, Y., S.-P. Xie, K. Kai, H. Okajima, H. Tokinaga, T. Murayama, M. Nonaka, and H. Nakamura: Observationsof marine atmospheric boundary layer transitions across the summer Kuroshio Extension. J. Climate, 22, 1360-1374.
21. Xie, S.-P., K. Hu, J. Hafner, H. Tokinaga, Y. Du, G. Huang, and T. Sampe: Indian Ocean capacitor effect on
Indo-western Pacific climate during the summer following El Nino. J. Climate, 22, 730-747.
22. Moteki, Q., R. Shirooka, K. Yoneyama, B. Geng, M. Katsumata, T. Ushiyama, H. Yamada, K. Yasunaga, N. Sato, H.
Kubota, K. K. Reddy, H. Tokinaga, A. Seiki, M. Fujita, Y. N. Takayabu, M. Yoshizaki, H. Uyeda and T. Chuda, 2007:
The impact of the assimilation of dropsonde observations during PALAU2005 in ALERA. SOLA, 3, 97-100.
23. Sato, N., H. Tokinaga, R. Shirooka, and N. Suginohara, 2006: Influence of mechanical mixing on a low summertime
SST in the western North Pacific ITCZ region. Geophys. Res. Lett., 33, doi:10.1029/2006GL025997.
24. Tokinaga, H., Y. Tanimoto, M. Nonaka, B. Taguchi, T. Fukamachi, S.-P. Xie, H. Nakamura, T. Watanabe, and I. Yasuda,
2006: Atmospheric sounding over the winter Kuroshio Extension: Effect of surface stability on atmospheric boundarylayer structure. Geophys. Res. Lett., 33, doi:10.1029/2005GL025102.
25. Tokinaga, H., Y. Tanimoto, and S.-P. Xie, 2005: SST-induced surface wind variations over the Brazil-Malvinas
confluence: Satellite and in situ observations. J. Climate, 18, 3470-3482.
26. Tokinaga, H., and Y. Tanimoto, 2004: Seasonal transition of SST anomalies in the tropical Indian Ocean during El
Nino and Indian Ocean dipole years. J. Meteor. Soc. Japan, 82, 1007-1018.
27. Xie, S.-P., J. Hafner, Y. Tanimoto, W.T. Liu, H. Tokinaga, and H.M. Xu, 2002: Bathymetric effect on the winter sea
surface temperature and climate of the Yellow and East China Seas. Geophys. Res. Lett., 29,
doi:10.1029/2002GL015884R.
28. Tanaka, H.L., and H. Tokinaga, 2002: Baroclinic instability in high latitudes induced by polar vortex: A connection tothe arctic oscillation. J. Atmos. Sci., 59, 69-82.

Other Publications
1. Tokinaga, H, 2014: Study of long-term tropical ocean changes caused by ocean-atmosphere interaction, Umi no Kenkyu,
23, 111-125.
2. Tokinaga, H., Y. Kosaka, and S.-P. Xie, 2011: Indian Ocean Dipole and Basin-wide modes. Tenki, 53, 231-233 (inJapanese).
3. Tokinaga, H., S.-P. Xie, F. Kobashi, and Y. Tanimoto, 2009: Local and remote influences of the Kuroshio Extension onthe atmosphere. U.S. CLIVAR Variations, 7(1), 1-4.
4. Tomita, H., H. Tokinaga, and Y. Tanimoto, 2008: Estimation of surface air specific humidity using satellite data over theKuroshio Extension region. Monthly Kaiyo, 49, 93-99 (in Japanese).
5. Konda, M., H. Ichikawa, A. Nagano, H. Tokinaga, and I. Yasuda, 2008: Observational analysis of the variability of thesea surface heat flux near the temperature front in the Kuroshio Extension region. Monthly Kaiyo, 49, 83-92 (inJapanese).
6. Kobashi, F., Y. Tanimoto, N. Iwasaka, T. Murayama, M. Nonaka, H. Tokinaga, and M. Konda, 2008: Variation of marine
atmospheric boundary layer observed over the winter Kuroshio Extension. Monthly Kaiyo, 49, 49-56 (in Japanese).
7. Tanimoto, Y., S.-P. Xie, K. Kai, H. Tokinaga, H. Okajima, T. Murayama, M. Nonaka, and H. Nakamura, 2008:
Modifications of marine atmospheric boundary layer across summer Kuroshio Extension. Monthly Kaiyo, 49, 42-48 (inJapanese).
8. Tanimoto, Y., H. Tokinaga, and K. Kai, 2006: In-situ observations of Kuroshio extension's influence on the atmosphere.
Monthly Kaiyo, 44, 75-80 (in Japanese).
9. Xie, S.-P., M. Nonaka, Y. Tanimoto, H. Tokinaga, H.M. Xu, W.S. Kessler, R.J. Small, W.T. Liu, and J. Hafner, 2004: A fineview from space. Bull. Amer. Meteor. Soc., 85, 1060-1062.

Invited and Selected Talks
1. Tokinaga, H., 2016: Patterns and influence of tropical ocean warming: Observtions and simulations, 2nd JSPS Core-to-core
International Workshop, Hanoi, Vietnam, August 2016.

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2. Tokinaga, H., S.-P. Xie, A. Timmermann, S. McGregor, T. Ogata, H. Kubota, and Y. M. Okumura, 2012: Regional
patterns of tropical Indo-Pacific climate change: Evidence of the Walker Circulation weakening. AGU Fall meeting, SanFrancisco, December 2012.
3. Tokinaga, H.: Detection of climate change patterns over the tropical Indo-Pacific: Long-term change in the Walker
Circulation. Award Lecture for the Yamamoto-Shyono Medal (in Japanese), MSJ Fall meeting, Sapporo, Japan, October
2012.
4. Tokinaga, H., S.-P. Xie, C. Deser, Y. Kosaka, Y.M. Okumura, A. Timmermann, S. McGregor, H. Kubota, and T. Ogata:
Observed and simulated patterns of tropical Indo-Pacific climate change over the past six decades: Evidence of theWalker circulation slowdown. The 3rd International Conference on Earth System Modelling, Hamburg, Germany, September
2012.
5. Tokinaga, H.: A long, consistent surface wind dataset for climate change analysis: Application over the tropicalIndo-Pacific, WCRP Open Science Conference, Denver, October 2011 (Selected as an oral presentation at Parallel Session)
6. Tokinaga, H., S. -P. Xie, and S. Minobe: Atmospheric effects of the Gulf Stream and Kuroshio Extension, AGU Fallmeeting, San Francisco, December 2008.

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