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Works (31)

Bottom–up approach for mitigating extreme events under limited intervention options: a case study with Lorenz 96

2025-03-21 | Preprint
DOI: 10.5194/egusphere-2025-987
Contributors: Takahito Mitsui; Shunji Kotsuki; Naoya Fujiwara; Atsushi Okazaki; Keita Tokuda
Source: check_circle
Crossref

Mitigating extreme events through multi-scenario ensemble forecasts and local interventions in the Lorenz 96 model

2025-03-18 | Preprint
DOI: 10.5194/egusphere-egu25-8594
Contributors: Takahito Mitsui; Shunji Kotsuki; Naoya Fujiwara; Atsushi Okazaki; Keita Tokuda
Source: check_circle
Crossref

Bridging Data Assimilation and Control: Ensemble Model Predictive Control for High-Dimensional Nonlinear Systems

2025-02-21 | Preprint
DOI: 10.5194/egusphere-2025-595
Contributors: Kenta Kurosawa; Atsushi Okazaki; Fumitoshi Kawasaki; Shunji Kotsuki
Source: check_circle
Crossref

Diurnal, seasonal, and interannual variations in δ(18O) of atmospheric O2 and its application to evaluate natural and anthropogenic changes in oxygen, carbon, and water cycles

Atmospheric Chemistry and Physics
2025-02-14 | Journal article
DOI: 10.5194/acp-25-1965-2025
Contributors: Shigeyuki Ishidoya; Satoshi Sugawara; Atsushi Okazaki
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Crossref

Development of the Isotope-enabled Fully Coupled Model MIROC6-iso

2025-01-20 | Preprint
DOI: 10.5194/egusphere-egu24-11691
Contributors: Yifan Li; Alexandre Cauquoin; Atsushi Okazaki; Kei Yoshimura
Source: check_circle
Crossref

Seasonally Resolved Age Scale based on Oxygen Isotope Record from SE-Dome II Ice Core, Greenland

2025-01-20 | Preprint
DOI: 10.5194/egusphere-egu24-14086
Contributors: Saaya Hamamoto; Sumito Matoba; Kaoru Kawakami; Mahiro Sasage; Mai Matsumoto; Kei Yoshimura; Atsushi Okazaki; Hayoung Bong; Yoshinori Iizuka; Ryu Uemura
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Crossref

Simulation of tritium releases into the atmosphere during the Fukushima accident and into the ocean due to planned discharge of treated water

2025-01-20 | Preprint
DOI: 10.5194/egusphere-egu24-7089
Contributors: Alexandre Cauquoin; Maksym Gusyev; Yoshiki Komuro; Hayoung Bong; Atsushi Okazaki; Kei Yoshimura
Source: check_circle
Crossref

Modeling tritium release to the atmosphere during the Fukushima Daiichi Nuclear Power Plant accident and application to estimating post-accident water system transit times

Environmental Science and Pollution Research
2025-01-16 | Journal article
DOI: 10.1007/s11356-025-35919-1
Contributors: Alexandre Cauquoin; Maksym Gusyev; Hayoung Bong; Atsushi Okazaki; Kei Yoshimura
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Crossref

Evaluation of carbon flux through groundwater and river water at the western foothills of Mt. Chokai

GEOCHEMICAL JOURNAL
2024 | Journal article
DOI: 10.2343/geochemj.GJ24021
Contributors: Mukuto Morita; Hiroto Kajita; Atsushi Okazaki; Nanami Ueda; Koji Umeda; Etsuo Uchida; Hodaka Kawahata
Source: check_circle
Crossref

Synoptic Moisture Intrusion Provided Heavy Isotope Precipitations in Inland Antarctica During the Last Glacial Maximum

Geophysical Research Letters
2024-04-28 | Journal article
DOI: 10.1029/2024GL108191
Contributors: K. Kino; A. Cauquoin; A. Okazaki; T. Oki; K. Yoshimura
Source: check_circle
Crossref

Diurnal, seasonal, and interannual variations in δ(18O) of atmospheric O2 and its application to evaluate changes in oxygen, carbon, and water cycles

2024-04-03 | Preprint
DOI: 10.5194/egusphere-2024-654
Contributors: Shigeyuki Ishidoya; Satoshi Sugawara; Atsushi Okazaki
Source: check_circle
Crossref

Supplementary material to "Diurnal, seasonal, and interannual variations in δ(18O) of atmospheric O2 and its application to evaluate changes in oxygen, carbon, and water cycles"

2024-04-03 | Preprint
DOI: 10.5194/egusphere-2024-654-supplement
Contributors: Shigeyuki Ishidoya; Satoshi Sugawara; Atsushi Okazaki
Source: check_circle
Crossref

Modeling Natural Tritium in Precipitation and its Dependence on Decadal Solar Activity Variations Using the Atmospheric General Circulation Model MIROC5‐Iso

Journal of Geophysical Research: Atmospheres
2024-03-16 | Journal article
DOI: 10.1029/2023JD039745
Contributors: A. Cauquoin; É. Fourré; A. Landais; A. Okazaki; K. Yoshimura
Source: check_circle
Crossref

Synoptic Moisture Intrusion Provided Heavy Isotope Precipitations in Inland Antarctica during the Last Glacial Maximum

2024-02-02 | Preprint
DOI: 10.22541/essoar.170689105.54469821/v1
Contributors: Kanon Kino; Alexandre Cauquoin; Atsushi Okazaki; Taikan Oki; Kei Yoshimura
Source: check_circle
Crossref

Process‐Based Intercomparison of Water Isotope‐Enabled Models and Reanalysis Nudging Effects

Journal of Geophysical Research: Atmospheres
2024-01-16 | Journal article
DOI: 10.1029/2023JD038719
Contributors: Hayoung Bong; Alexandre Cauquoin; Atsushi Okazaki; Eun‐Chul Chang; Martin Werner; Zhongwang Wei; Namgu Yeo; Kei Yoshimura
Source: check_circle
Crossref

Heavy Water Isotope Precipitation in Inland East Antarctica Accompanied by Strong Southern Westerly Winds during the Last Glacial Maximum

2023-05-15 | Preprint
DOI: 10.5194/egusphere-egu23-4775
Contributors: Kanon Kino; Alexandre Cauquoin; Atsushi Okazaki; Taikan Oki; Kei Yoshimura
Source: check_circle
Crossref

Impact of Proxies and Prior Estimates on Data Assimilation Using Isotope Ratios for the Climate Reconstruction of the Last Millennium

Earth and Space Science
2022-05 | Journal article
DOI: 10.1029/2020EA001618
Contributors: Satoru Shoji; Atsushi Okazaki; Kei Yoshimura
Source: check_circle
Crossref

Contribution of the Southern Annular Mode to Variations in Water Isotopes of Daily Precipitation at Dome Fuji, East Antarctica

Journal of Geophysical Research: Atmospheres
2021-12-16 | Journal article
DOI: 10.1029/2021JD035397
Contributors: Kanon Kino; Atsushi Okazaki; Alexandre Cauquoin; Kei Yoshimura
Source: check_circle
Crossref

Contribution of the Southern Annular Mode to variations in water isotopes of daily precipitation at Dome Fuji, East Antarctica

2021-09-15 | Other
DOI: 10.1002/essoar.10507344.3
Contributors: Kanon Kino; Atsushi Okazaki; Alexandre Cauquoin; Kei Yoshimura
Source: check_circle
Crossref

Revisiting Online and Offline Data Assimilation Comparison for Paleoclimate Reconstruction: An Idealized OSSE Study

Journal of Geophysical Research: Atmospheres
2021-08-27 | Journal article
DOI: 10.1029/2020JD034214
Contributors: Atsushi Okazaki; Takemasa Miyoshi; Kei Yoshimura; Steven J. Greybush; Fuqing Zhang
Source: check_circle
Crossref

Contribution of the Southern Annular Mode on variations in water isotopes of daily precipitation at Dome Fuji, East Antarctica

2021-06-23 | Other
DOI: 10.1002/essoar.10507344.2
Contributors: Kanon Kino; Atsushi Okazaki; Alexandre Cauquoin; Kei Yoshimura
Source: check_circle
Crossref

Impact of proxies and prior estimates on data assimilation using isotope ratios for the climate reconstruction of the last millennium

2020-12-22 | Other
DOI: 10.1002/essoar.10505417.2
Contributors: Satoru Shoji; Atsushi Okazaki; Kei Yoshimura
Source: check_circle
Crossref

Impact of proxies and prior estimates on data assimilation using isotope ratios for the climate reconstruction of the last millennium

2020-12-16 | Other
DOI: 10.1002/essoar.10505417.1
Contributors: Satoru Shoji; Atsushi Okazaki; Kei Yoshimura
Source: check_circle
Crossref

Revisiting online and offline data assimilation comparison for paleoclimate reconstruction: an idealized OSSE study

2020-11-17 | Other
DOI: 10.1002/essoar.10504749.1
Contributors: Atsushi Okazaki; Takemasa Miyoshi; Kei Yoshimura; Steven J. Greybush; Fuqing Zhang
Source: check_circle
Crossref

Weight structure of the Local Ensemble Transform Kalman Filter: A case with an intermediate atmospheric general circulation model

Quarterly Journal of the Royal Meteorological Society
2020-10 | Journal article
DOI: 10.1002/qj.3852
Contributors: Shunji Kotsuki; Andrew Pensoneault; Atsushi Okazaki; Takemasa Miyoshi
Source: check_circle
Crossref

Global Evaluation of Proxy System Models for Stable Water Isotopes With Realistic Atmospheric Forcing

Journal of Geophysical Research: Atmospheres
2019-08-27 | Journal article
DOI: 10.1029/2018JD029463
Contributors: Atsushi Okazaki; Kei Yoshimura
Source: check_circle
Crossref

Simulating precipitation radar observations from a geostationary satellite

Atmospheric Measurement Techniques
2019-07-19 | Journal article
DOI: 10.5194/amt-12-3985-2019
Contributors: Atsushi Okazaki; Takumi Honda; Shunji Kotsuki; Moeka Yamaji; Takuji Kubota; Riko Oki; Toshio Iguchi; Takemasa Miyoshi
Source: check_circle
Crossref

Simulating precipitation radar observations from a geostationary satellite

2018-11-09 | Preprint
DOI: 10.5194/amt-2018-278
Contributors: Atsushi Okazaki; Takumi Honda; Shunji Kotsuki; Moeka Yamaji; Takuji Kubota; Riko Oki; Toshio Iguchi; Takemasa Miyoshi
Source: check_circle
Crossref

Development and evaluation of a system of proxy data assimilation for paleoclimate reconstruction

Climate of the Past
2017-04-20 | Journal article
DOI: 10.5194/cp-13-379-2017
Contributors: Atsushi Okazaki; Kei Yoshimura
Source: check_circle
Crossref

Development and evaluation of a system of proxy data assimilation for paleoclimate reconstruction

2016-11-22 | Preprint
DOI: 10.5194/cp-2016-121
Contributors: Atsushi Okazaki; Kei Yoshimura
Source: check_circle
Crossref

Supplementary material to "Development and evaluation of a system of proxy data assimilation for paleoclimate reconstruction"

2016-11-22 | Preprint
DOI: 10.5194/cp-2016-121-supplement
Contributors: Atsushi Okazaki; Kei Yoshimura
Source: check_circle
Crossref

Peer review (5 reviews for 4 publications/grants)

Review activity for Climate dynamics. (2)
Review activity for Nature (1)
Review activity for Nature communications (1)
Review activity for Progress in earth and planetary science. (1)
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