A
Akira Oka
Researcher at University of Tokyo
Publications - 204
Citations - 5976
Akira Oka is an academic researcher from University of Tokyo. The author has contributed to research in topics: Glacial period & Ocean current. The author has an hindex of 32, co-authored 194 publications receiving 5055 citations. Previous affiliations of Akira Oka include Tottori University & Kyorin University.
Papers
More filters
Journal ArticleDOI
Investigating the Causes of the Response of the Thermohaline Circulation to Past and Future Climate Changes
Ronald J. Stouffer,Jianjun Yin,Jonathan M. Gregory,Jonathan M. Gregory,Keith W. Dixon,Michael J. Spelman,William J. Hurlin,Andrew J. Weaver,Michael Eby,Gregory M. Flato,Hiroyasu Hasumi,Aixue Hu,Johann H. Jungclaus,Igor Kamenkovich,Anders Levermann,Marisa Montoya,Shingo Murakami,Susanne Nawrath,Akira Oka,W. R. Peltier,Daniel Y. Robitaille,Andrei P. Sokolov,G. Vettoretti,S. L. Weber +23 more
TL;DR: In this article, the authors compare the performance of different models ranging from the earth system models of intermediate complexity (EMICs) to the fully coupled atmosphere-ocean general circulation models (AOGCMs) to document and improve understanding of the causes of wide variations in the modeled THC response.
Journal ArticleDOI
A model intercomparison of changes in the Atlantic thermohaline circulation in response to increasing atmospheric CO2 concentration
Jonathan M. Gregory,Jonathan M. Gregory,Keith W. Dixon,Ronald J. Stouffer,Andrew J. Weaver,E. Driesschaert,Michael Eby,Thierry Fichefet,Hiroyasu Hasumi,Aixue Hu,Johann H. Jungclaus,Igor Kamenkovich,Anders Levermann,Marisa Montoya,Shingo Murakami,S. Nawrath,Akira Oka,Andrei P. Sokolov,Robert Thorpe +18 more
TL;DR: In this article, integrations with a common design have been undertaken with eleven different climate models to compare the response of the Atlantic thermohaline circulation ( THC) to time-dependent climate change caused by increasing atmospheric CO2 concentration.
Journal ArticleDOI
Epidemiology of acute encephalopathy in Japan, with emphasis on the association of viruses and syndromes.
Ai Hoshino,Makiko Saitoh,Akira Oka,Akihisa Okumura,Masaya Kubota,Yoshiaki Saito,Jun-ichi Takanashi,Shinichi Hirose,Takanori Yamagata,Hideo Yamanouchi,Masashi Mizuguchi +10 more
TL;DR: A research committee supported by the Japanese government conducted a nationwide survey on the epidemiology of acute encephalopathy in Japan using a questionnaire, finding that Mortality was high in ANE and HSES, but was low in AESD, MERS and HHV-6-associated encephalopathic syndromes.
Journal ArticleDOI
Mutations of ARX are associated with striking pleiotropy and consistent genotype–phenotype correlation
Mitsuhiro Kato,Soma Das,Kristin Petras,Kunio Kitamura,Ken Ichirou Morohashi,Diane Abuelo,Mason Barr,Dominique Bonneau,Angela F. Brady,Nancy J. Carpenter,Karen L. Cipero,Francesco Frisone,Takayuki Fukuda,Renzo Guerrini,Eri Iida,Masayuki Itoh,Amy Feldman Lewanda,Yukiko Nanba,Akira Oka,Virginia K. Proud,Pascale Saugier-Veber,Susan Schelley,Angelo Selicorni,Rachel Shaner,Margherita Silengo,Fiona Stewart,Noriyuki Sugiyama,Jun Toyama,Annick Toutain,Ana Lía Vargas,Masako Yanazawa,Elaine H. Zackai,William B. Dobyns +32 more
TL;DR: The group of phenotypes associated with ARX mutations demonstrates remarkable pleiotropy, but also comprises a nearly continuous series of developmental disorders that begins with hydranencephaly, lissencephally, and agenesis of the corpus callosum, and ends with a series of overlapping syndromes with apparently normal brain structure.
Journal ArticleDOI
Simultaneous constraints on the growth of structure and cosmic expansion from the multipole power spectra of the SDSS DR7 LRG sample
Akira Oka,Shun Saito,Takahiro Nishimichi,Atsushi Taruya,Atsushi Taruya,Atsushi Taruya,Kazuhiro Yamamoto +6 more
TL;DR: In this paper, the authors examined the validity of a theoretical model for the non-linear RSDs using mock subhalo catalogues from N-body simulations, which are constructed to match with the observed multipole power spectra.