If you made any changes in Pure these will be visible here soon.

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.

  • 5 Similar Profiles
stratosphere Earth & Environmental Sciences
planetary wave Earth & Environmental Sciences
Rossby wave Earth & Environmental Sciences
winter Earth & Environmental Sciences
Northern Hemisphere Earth & Environmental Sciences
planetary waves Physics & Astronomy
troposphere Earth & Environmental Sciences
warming Earth & Environmental Sciences

Network Recent external collaboration on country level. Dive into details by clicking on the dots.

Research Output 1983 2019

  • 607 Citations
  • 14 h-Index
  • 35 Article

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

stratospheric warming
Upper atmosphere
Eastern Hemisphere

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
jet stream
polar vortex

Analysis of the Ozone Reduction Event Over the Southern Tip of South America in November 2009

Akiyoshi, H., Kadowaki, M., Nakamura, H., Sugita, T., Hirooka, T., Harada, Y. & Mizuno, A., Nov 27 2018, In : Journal of Geophysical Research: Atmospheres. 123, 22, p. 12,523-12,542

Research output: Contribution to journalArticle

total ozone
geopotential height
3 Citations (Scopus)
planetary wave
planetary waves
Wave propagation
wave propagation
2 Citations (Scopus)

Stratospheric tropical warming event and its impact on the polar and tropical troposphere

Kodera, K., Eguchi, N., Mukougawa, H., Nasuno, T. & Hirooka, T., Jan 12 2017, In : Atmospheric Chemistry and Physics. 17, 1, p. 615-625 11 p.

Research output: Contribution to journalArticle

planetary wave
polar region