Akira Oka

4.4k total citations · 1 hit paper
77 papers, 2.2k citations indexed

About

Akira Oka is a scholar working on Oceanography, Atmospheric Science and Global and Planetary Change. According to data from OpenAlex, Akira Oka has authored 77 papers receiving a total of 2.2k indexed citations (citations by other indexed papers that have themselves been cited), including 40 papers in Oceanography, 39 papers in Atmospheric Science and 23 papers in Global and Planetary Change. Recurrent topics in Akira Oka's work include Geology and Paleoclimatology Research (28 papers), Marine and coastal ecosystems (25 papers) and Oceanographic and Atmospheric Processes (21 papers). Akira Oka is often cited by papers focused on Geology and Paleoclimatology Research (28 papers), Marine and coastal ecosystems (25 papers) and Oceanographic and Atmospheric Processes (21 papers). Akira Oka collaborates with scholars based in Japan, United States and Australia. Akira Oka's co-authors include Ayako Abe‐Ouchi, Hiroyasu Hasumi, Yasuhiro Yamanaka, Rumi Ohgaito, Masakazu Yoshimori, A. Yamamoto, Yoshihiro Niwa, Ronald J. Stouffer, S. Nawrath and E. Driesschaert and has published in prestigious journals such as Nature Communications, Journal of Climate and Geophysical Research Letters.

In The Last Decade

Akira Oka

74 papers receiving 2.2k citations

Hit Papers

align trajectories

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.

A model intercomparison of changes in the Atlantic thermohaline circulation in response to increasing atmospheric CO₂ concentration

2005 501 citations Hiroyasu Hasumi, Akira Oka et al. Geophysical Research Letters profile →

Peers — A (Enhanced Table)

Peers by citation overlap · career bar shows stage (early→late) cites · hero ref

Name	h						Papers	Cites
Akira Oka Japan	24	1.2k	976	929	313	262	77	2.2k
Einar Svendsen Norway	27	971 0.8×	1.1k 1.1×	1.4k 1.5×	238 0.8×	23 0.1×	87	2.7k
P. M. Kelly United Kingdom	27	1.5k 1.3×	1.5k 1.6×	284 0.3×	51 0.2×	171 0.7×	62	2.8k
Robert J. Oglesby United States	36	2.4k 2.1×	1.7k 1.7×	221 0.2×	224 0.7×	84 0.3×	106	3.4k
Justin E. Jones United States	19	2.3k 2.0×	1.9k 2.0×	349 0.4×	119 0.4×	335 1.3×	21	3.5k
Yosuke Fujii Japan	28	1.5k 1.3×	1.4k 1.4×	1.3k 1.4×	61 0.2×	35 0.1×	83	2.5k
Robert A. Eagle United States	32	931 0.8×	408 0.4×	518 0.6×	182 0.6×	1.3k 4.8×	72	3.4k
Hisayuki Inoue Japan	33	975 0.8×	1.5k 1.5×	1.4k 1.6×	178 0.6×	38 0.1×	95	2.6k
Hartmut Peters United States	28	800 0.7×	540 0.6×	1.0k 1.1×	36 0.1×	72 0.3×	61	2.2k
Mingxi Yang United Kingdom	25	1.3k 1.2×	844 0.9×	685 0.7×	116 0.4×	13 0.0×	80	2.2k
Baode Chen China	22	2.0k 1.7×	1.9k 1.9×	264 0.3×	48 0.2×	36 0.1×	67	3.3k

Countries citing papers authored by Akira Oka

Since Specialization

Citations

This map shows the geographic impact of Akira Oka'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 Akira Oka with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Akira Oka more than expected).

Fields of papers citing papers by Akira Oka

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Akira Oka. 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 Akira Oka. The network helps show where Akira Oka may publish in the future.

Co-authorship network of co-authors of Akira Oka

This figure shows the co-authorship network connecting the top 25 collaborators of Akira Oka. A scholar is included among the top collaborators of Akira Oka 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 Akira Oka. Akira Oka is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

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20 of 20 papers shown

1.

Kobayashi, Hidetaka, Akira Oka, Takashi Obase, & Ayako Abe‐Ouchi. (2024). Assessing transient changes in the ocean carbon cycle during the last deglaciation through carbon isotope modeling. Climate of the past. 20(3). 769–787.

2.

Sasaki, Yusuke, Hidetaka Kobayashi, & Akira Oka. (2022). Global simulation of dissolved ²³¹ Pa and ²³⁰ Th in the ocean and the sedimentary ²³¹ Pa∕ ²³⁰ Th ratios with the ocean general circulation model COCO ver4.0. Geoscientific model development. 15(5). 2013–2033. 6 indexed citations

3.

Endo, Yuki, Sadamu Toki, Akira Oka, et al.. (2022). Pemphigus vegetans with antibodies against desmoglein 1 and desmocollin 1–3: a case report and literature review. Journal of the European Academy of Dermatology and Venereology. 36(12). e998–e1000. 2 indexed citations

4.

Oka, Akira, Ayako Abe‐Ouchi, Sam Sherriff‐Tadano, et al.. (2021). Glacial mode shift of the Atlantic meridional overturning circulation by warming over the Southern Ocean. Communications Earth & Environment. 2(1). 13 indexed citations

5.

Sherriff‐Tadano, Sam, Ayako Abe‐Ouchi, Akira Oka, T. Mitsui, & Fuyuki Saito. (2021). Does a difference in ice sheets between Marine Isotope Stages 3 and 5a affect the duration of stadials?. 1 indexed citations

6.

Sherriff‐Tadano, Sam, Ayako Abe‐Ouchi, & Akira Oka. (2021). Impact of mid-glacial ice sheets on deep ocean circulation and global climate. Climate of the past. 17(1). 95–110. 11 indexed citations

7.

Sherriff‐Tadano, Sam, Ayako Abe‐Ouchi, Akira Oka, T. Mitsui, & Fuyuki Saito. (2021). Does a difference in ice sheets between Marine Isotope Stages 3 and 5a affect the duration of stadials? Implications from hosing experiments. Climate of the past. 17(5). 1919–1936. 2 indexed citations

8.

Lhardy, Fanny, Nathaëlle Bouttes, Didier M. Roche, et al.. (2021). A First Intercomparison of the Simulated LGM Carbon Results Within PMIP‐Carbon: Role of the Ocean Boundary Conditions. Paleoceanography and Paleoclimatology. 36(10). 13 indexed citations

9.

Asakai, Hiroko, Katsutoshi Nakano, Hikoro Matsui, et al.. (2020). Intra-Peritoneal Migration of an Epicardial Pacemaker Causing Recurrent Vomiting. 4(2). 90–92.

10.

Sherriff‐Tadano, Sam, Ayako Abe‐Ouchi, & Akira Oka. (2020). Impact of mid-glacial ice sheets on deep ocean circulation and global climate: Role of surface cooling on the AMOC. 2 indexed citations

11.

Yamamoto, A., Ayako Abe‐Ouchi, Rumi Ohgaito, Akinori Ito, & Akira Oka. (2019). Glacial CO ₂ decrease and deep-water deoxygenation by iron fertilization from glaciogenic dust. Climate of the past. 15(3). 981–996. 36 indexed citations

12.

Oka, Akira & Masahiro Watanabe. (2017). The post‐2002 global surface warming slowdown caused by the subtropical Southern Ocean heating acceleration. Geophysical Research Letters. 44(7). 3319–3327. 11 indexed citations

13.

Kusahara, Kazuya, Tatsuru Sato, Akira Oka, et al.. (2015). Modelling the Antarctic marine cryosphere at the Last Glacial Maximum. Annals of Glaciology. 56(69). 425–435. 15 indexed citations

14.

Chikamoto, M. O., Ayako Abe‐Ouchi, Akira Oka, Rumi Ohgaito, & Axel Timmermann. (2012). Quantifying the ocean's role in glacial CO ₂ reductions. Climate of the past. 8(2). 545–563. 29 indexed citations

15.

Chikamoto, M. O., Ayako Abe‐Ouchi, Akira Oka, Rumi Ohgaito, & Axel Timmermann. (2011). Glacial marine carbon cycle sensitivities to Atlantic ocean circulation reorganization by coupled climate model simulations. 1 indexed citations

16.

Oka, Akira, et al.. (2011). Mechanisms controlling export production at the LGM: Effects of changes in oceanic physical fields and atmospheric dust deposition. Global Biogeochemical Cycles. 25(2). n/a–n/a. 40 indexed citations

17.

Tachiiri, Kaoru, J. C. Hargreaves, J. D. Annan, et al.. (2010). Development of a system emulating the global carbon cycle in Earth system models. Geoscientific model development. 3(2). 365–376. 12 indexed citations

18.

Oka, Akira, et al.. (2006). Deep convection seesaw controlled by freshwater transport through the Denmark Strait. Ocean Modelling. 15(3-4). 157–176. 24 indexed citations

19.

Suzuki, Tatsuo, Hiroyasu Hasumi, T. Nishimura, et al.. (2005). Projection of future sea level and its variability in a high‐resolution climate model: Ocean processes and Greenland and Antarctic ice‐melt contributions. Geophysical Research Letters. 32(19). 23 indexed citations

20.

Kubota, Masaya, Akira Oka, Kin S, & Yoichi Sakakihara. (1996). Generators of rolandic discharges identified by magnetoencephalography.. PubMed. 47. 393–401. 7 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.

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