Isamu Hirota

4.7k total citations · 1 hit paper
65 papers, 3.6k citations indexed

About

Isamu Hirota is a scholar working on Atmospheric Science, Global and Planetary Change and Astronomy and Astrophysics. According to data from OpenAlex, Isamu Hirota has authored 65 papers receiving a total of 3.6k indexed citations (citations by other indexed papers that have themselves been cited), including 55 papers in Atmospheric Science, 35 papers in Global and Planetary Change and 31 papers in Astronomy and Astrophysics. Recurrent topics in Isamu Hirota's work include Atmospheric Ozone and Climate (45 papers), Ionosphere and magnetosphere dynamics (29 papers) and Climate variability and models (27 papers). Isamu Hirota is often cited by papers focused on Atmospheric Ozone and Climate (45 papers), Ionosphere and magnetosphere dynamics (29 papers) and Climate variability and models (27 papers). Isamu Hirota collaborates with scholars based in Japan, Slovakia and United States. Isamu Hirota's co-authors include K. Sato, Toshihiko Hirooka, James R. Holton, Masaaki Takahashi, M. Joan Alexander, William J. Randel, Takeshi Horinouchi, Jonathan S. Kinnersley, Lesley J. Gray and Peter Haynes and has published in prestigious journals such as Nature, Journal of Geophysical Research Atmospheres and Journal of the Atmospheric Sciences.

In The Last Decade

Isamu Hirota

65 papers receiving 3.3k citations

Hit Papers

The quasi‐biennial oscillation 2001 2026 2009 2017 2001 500 1000 1.5k
What are hit papers?

Hit papers significantly outperform the citation benchmark for their cohort. A paper qualifies if it has ≥500 total citations, achieves ≥1.5× the top-1% citation threshold for papers in the same subfield and year (this is the minimum needed to enter the top 1%, not the average within it), or reaches the top citation threshold in at least one of its specific research topics.

  1. The quasi‐biennial oscillation
    2001 1.6k citations Isamu Hirota, K. Sato et al. profile →

Peers

Isamu Hirota
J. J. Barnett United Kingdom
Taroh Matsuno Japan
Murry L. Salby United States
Marie‐Lise Chanin France
Takeshi Horinouchi Japan
Douglas V. Hoyt United States
J. E. Geisler United States
A. O’Neill United Kingdom
Lawrence Coy United States
Peter Thejll Denmark
J. J. Barnett United Kingdom
Isamu Hirota
Citations per year, relative to Isamu Hirota Isamu Hirota (= 1×) peers J. J. Barnett

Countries citing papers authored by Isamu Hirota

Since Specialization
Citations

This map shows the geographic impact of Isamu Hirota's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by Isamu Hirota with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Isamu Hirota more than expected).

Fields of papers citing papers by Isamu Hirota

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Isamu Hirota. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by Isamu Hirota. The network helps show where Isamu Hirota may publish in the future.

Co-authorship network of co-authors of Isamu Hirota

This figure shows the co-authorship network connecting the top 25 collaborators of Isamu Hirota. A scholar is included among the top collaborators of Isamu Hirota based on the total number of citations received by their joint publications. Widths of edges represent the number of papers authors have co-authored together. Node borders signify the number of papers an author published with Isamu Hirota. Isamu Hirota is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

20 of 20 papers shown
1.
Hayashida, Sachiko, Tatsuya Nagashima, Kengo Sudo, et al.. (2012). Enhanced Mid-Latitude Tropospheric Column Ozone over East Asia: Coupled Effects of Stratospheric Ozone Intrusion and Anthropogenic Sources. Journal of the Meteorological Society of Japan Ser II. 90(2). 207–222. 6 indexed citations
2.
Hirota, Isamu, et al.. (2002). Interannual Variations of Planetary Waves in the Southern Hemisphere Stratosphere.. Journal of the Meteorological Society of Japan Ser II. 80(4B). 1013–1027. 17 indexed citations
3.
Hirota, Isamu, et al.. (1998). Quasi-Stationary Planetary Waves in the Southern Hemisphere Troposphere. Journal of the Meteorological Society of Japan Ser II. 76(4). 581–596. 1 indexed citations
4.
Sato, K., et al.. (1997). A Study on Seasonal Variation of Upper Tropospheric Medium-Scale Waves over East Asia based on Regional Climate Model Data. Journal of the Meteorological Society of Japan Ser II. 75(1). 13–22. 10 indexed citations
5.
Naito, Yoko & Isamu Hirota. (1997). Interannual Variability of the Northern Winter Stratospheric Circulation Related to the QBO and the Solar Cycle. Journal of the Meteorological Society of Japan Ser II. 75(4). 925–937. 81 indexed citations
6.
Hirota, Isamu, Kazutaka YAMADA, & K. Sato. (1995). Medium-Scale Travelling Waves over the North Atlantic. Journal of the Meteorological Society of Japan Ser II. 73(6). 1175–1179. 10 indexed citations
7.
Hirota, Isamu, et al.. (1988). The Influence of the Southern Oscillation on Extratropical Circulations during the Northern Hemisphere Winter. Journal of the Meteorological Society of Japan Ser II. 66(3). 419–432. 6 indexed citations
8.
Asô, T., J. Röttger, P. Czechowsky, et al.. (1986). A cooperative synchronous observation of winds and tides in the tropical lower stratosphere and mesosphere using VHF radars at Jicamarca and Arecibo.. Earth Planets and Space. 38(2). 81–97. 1 indexed citations
9.
Mukougawa, Hitoshi & Isamu Hirota. (1986). Nonlinear Evolution of Forced Rossby Waves in a Barotropic Atmosphere Part II: Initial-value Problems. Journal of the Meteorological Society of Japan Ser II. 64(2). 213–225. 4 indexed citations
10.
Mukougawa, Hitoshi & Isamu Hirota. (1986). Nonlinear Evolution of Forced Rossby Waves in a Baro tropic Atmosphere Part I: Stability Properties of Forced Rossby Waves. Journal of the Meteorological Society of Japan Ser II. 64(2). 197–211. 5 indexed citations
11.
Hirota, Isamu, et al.. (1985). A Statistical Study of Inertia-Gravity Waves in the Middle Atmosphere. Journal of the Meteorological Society of Japan Ser II. 63(6). 1055–1066. 101 indexed citations
12.
Yoshida, Atsushi & Isamu Hirota. (1979). Diurnal Wind Variation in the Troposphere and Lower Stratosphere over Japan. Journal of the Meteorological Society of Japan Ser II. 57(1). 29–38. 3 indexed citations
13.
Hirota, Isamu. (1975). Spectral Analysis of Planetary Waves in the Summer Stratosphere and Mesosphere. Journal of the Meteorological Society of Japan Ser II. 53(1). 33–44. 15 indexed citations
14.
Hirota, Isamu, et al.. (1973). Structure and Behavior of the Aleutian Anticyclone as Revealed by Meteorological Rocket and Satellite Observations. Journal of the Meteorological Society of Japan Ser II. 51(5). 353–363. 5 indexed citations
15.
Hirota, Isamu. (1971). Excitation of Planetary Rossby Waves in the Winter Stratosphere by Periodic Forcing. Journal of the Meteorological Society of Japan Ser II. 49(6). 439–449. 37 indexed citations
16.
Hirota, Isamu. (1971). On the Response of Forced Rossby Waves to the Time Change of Zonal Wind and Forcing. Journal of the Meteorological Society of Japan Ser II. 49A(0). 545–552. 5 indexed citations
17.
Hirota, Isamu & Yasuo Satô. (1969). Periodic Variation of the Winter Stratospheric Circulation and Intermittent Vertical Propagation. Journal of the Meteorological Society of Japan Ser II. 47(5). 390–402. 52 indexed citations
18.
Hirota, Isamu. (1968). Planetary Waves in the Upper Stratosphere in Early 1966. Journal of the Meteorological Society of Japan Ser II. 46(5). 418–430. 24 indexed citations
19.
Hirota, Isamu. (1967). Dynamic Instability of the Stratospheric Polar Vortex. Journal of the Meteorological Society of Japan Ser II. 45(5). 409–421. 17 indexed citations
20.
Hirota, Isamu. (1967). The Vertical Structure of the Stratospheric Sudden Warming. Journal of the Meteorological Society of Japan Ser II. 45(5). 422–435. 8 indexed citations

Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive bibliographic database. While OpenAlex provides broad and valuable coverage of the global research landscape, it—like all bibliographic datasets—has inherent limitations. These include incomplete records, variations in author disambiguation, differences in journal indexing, and delays in data updates. As a result, some metrics and network relationships displayed in Rankless may not fully capture the entirety of a scholar's output or impact.

Explore authors with similar magnitude of impact

Breakdown of academic impact, for papers by J. J. Barnett Breakdown of academic impact, for papers by Taroh Matsuno Breakdown of academic impact, for papers by Murry L. Salby Breakdown of academic impact, for papers by Marie‐Lise Chanin Breakdown of academic impact, for papers by Takeshi Horinouchi Breakdown of academic impact, for papers by Douglas V. Hoyt Breakdown of academic impact, for papers by J. E. Geisler Breakdown of academic impact, for papers by A. O’Neill Breakdown of academic impact, for papers by Lawrence Coy Breakdown of academic impact, for papers by Peter Thejll
Rankless by CCL
2026