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Fingerprint Dive into the research topics where Toshihiko Hirooka is active. These topic labels come from the works of this person. Together they form a unique fingerprint.

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Research Output

  • 646 Citations
  • 14 h-Index
  • 38 Article

Tropical water vapour in the lower stratosphere and its relationship to tropical/extratropical dynamical processes in ERA5

Wang, T., Zhang, Q., Hannachi, A., Hirooka, T. & Hegglin, M. I., Jan 1 2020, (Accepted/In press) In : Quarterly Journal of the Royal Meteorological Society.

Research output: Contribution to journalArticle

Open Access
  • Diagnostics of a WN2-Type Major Sudden Stratospheric Warming Event in February 2018 Using a New Three-Dimensional Wave Activity Flux

    Harada, Y., Sato, K., Kinoshita, T., Yasui, R., Hirooka, T. & Naoe, H., Jun 27 2019, In : Journal of Geophysical Research: Atmospheres. 124, 12, p. 6120-6142 23 p.

    Research output: Contribution to journalArticle

  • On the dynamics of the spring seasonal transition in the two hemispheric high-latitude stratosphere

    Wang, T., Zhang, Q., Hannachi, A., Lin, Y. & Hirooka, T., Jan 1 2019, In : Tellus, Series A: Dynamic Meteorology and Oceanography. 71, 1, p. 1-18 18 p.

    Research output: Contribution to journalArticle

    Open Access
  • Primary factors behind the Heavy Rain Event of July 2018 and the subsequent heat wave in Japan

    Shimpo, A., Takemura, K., Wakamatsu, S., Togawa, H., Mochizuki, Y., Takekawa, M., Tanaka, S., Yamashita, K., Maeda, S., Kurora, R., Murai, H., Kitabatake, N., Tsuguti, H., Mukougawa, H., Iwasaki, T., Kawamura, R., Kimoto, M., Takayabu, I., Takayabu, Y. N., Tanimoto, Y. & 5 others, Hirooka, T., Masumoto, Y., Watanabe, M., Tsuboki, K. & Nakamura, H., 2019, In : Scientific Online Letters on the Atmosphere. 15, A, p. 13-18 6 p.

    Research output: Contribution to journalArticle

    Open Access
  • 12 Citations (Scopus)

    Troposphere-stratosphere dynamical coupling in regard to the north atlantic eddy-driven jet variability

    Iqbal, W., Hannachi, A., Hirooka, T., Chafik, L. & Harada, Y., Jan 1 2019, In : Journal of the Meteorological Society of Japan. 97, 3, p. 657-671 15 p.

    Research output: Contribution to journalArticle

    Open Access