Lower trophic level marine ecosystem

Ice algae

Ocean modelling

Ocean Biogeochemistry

Natural sciences, Atmospheric and hydrospheric science

Jan. 2026 - Present
Japan Agency for Marine-Earth Science and Technology, Research Institute for Marine Technology and Engineering (RIMTE), Smart Sensing Technology Development Center, Adjunct Researcher

Apr. 2022 - Present
Japan Agency for Marine-Earth Science and Technology, Research Institute for Value-Added-Information Generation (VAiG), Application Laboratory (APL), Researcher

Mar. 2022 - Jan. 2025
University of Tasmania, Institute for Marine and Antarctic Studies (IMAS), Adjunct Researcher

Oct. 2018 - Feb. 2022
University of Tasmania, Institute for Marine and Antarctic Studies, Research Associate

Sep. 2013 - May 2019, University of Victoria, Faculty of Graduate Studies, School of Earth and Ocean Sciences

Sep. 2011 - Oct. 2013, Memorial University of Newfoundland, Faculty of Science, Physical Oceanography

Sep. 2007 - May 2011, Memorial University of Newfoundland, Faculty of Science, Environmental Physics (major) & Mathematics (minor)

Aug. 2024 - Present
Marine Ecosystem Analysis and Prediction Task Team (MEAP-TT) member, OceanPredict

Apr. 2024 - Present
Early Career HotspOttErS (ECHOES) Representative, Grant-in-Aid for Transformative Research Areas (A) Habitable Japan: Sustainability of atmospheric and oceanic environment as a survival basis of island country Japan

Apr. 2023 - Present
Western Pacific and Marginal seas of South and East Asia (WPMSEA) topic leader for ocean forecasting: biogeochemistry, OceanPrediction Decade Collaborative Center (DCC-OP)

Aug. 2025 - Nov. 2026
DITTO Summit 2026 LOC, Japan Agency for Marine Earth-Science and Technology

Nov. 2024 - Jul. 2025
Committee for the Habitable Japan International Workshop, Grant-in-Aid for Transformative Research Areas (A) Habitable Japan: Sustainability of atmospheric and oceanic environment as a survival basis of island country Japan

Jan. 2019 - Dec. 2021
Diversity and Culture Committee, Australian Research Council Centre of Excellence for Climate Extremes

Sakiko Ishino; Megan D. Willis; Hélène Angot; Thorsten Bartels-Rausch; Odile Crabeck; Bruno Delille; Erin Dunne; Emily Franklin; Antoine Haddon; Hakase Hayashida; Sankirna D. Joge; Rémy Lapere; Hyung-Gyu Lim; Anoop S. Mahajan; Marc D. Mallet; George Manville; Louis Marelle; Daiki Nomura; Kerri A. Pratt; Ilka Peeken; Ruth Price; Rafel Simó; Jacqueline Stefels; Jennie L. Thomas; Cort L. Zang; Nadja Steiner
The biogenic sulfur cycle in the coupled ocean–sea ice–atmosphere system
Elem Sci Anth, 16 Feb. 2026
14, 1, 1, 60

Sonya L. Fiddes; Matthew T. Woodhouse; Marc D. Mallet; Liam J. Lamprey; Ruhi S. Humphries; Alain Protat; Simon P. Alexander; Hakase Hayashida; Samuel Putland; Branka Miljevic; Robyn Schofield
The ACCESS-AM2 climate model underestimates aerosol concentration in the Southern Ocean; improving aerosol representation could be problematic for the global energy balance
Atmospheric Chemistry and Physics, 24 Nov. 2025

Denisse Fierro-Arcos; Stuart Corney; Amelie Meyer; Hakase Hayashida; Andrew E. Kiss; Louise Emmerson; Colin Southwell; Petra Heil
High-resolution ocean sea ice model outputs to predict species distribution: case study of crabeater seal Lobodon carcinophagus in East Antarctica
MARINE ECOLOGY PROGRESS SERIES, 30 Oct. 2025
772, 193, 214

Shenghui Li; Charles I. Addey; Raphael Roman; Hakase Hayashida; Chunhua Jiang; Chen Hu; Luz de Lourdes Aurora Coronado-Alvarez; Hyung-Gyu Lim; Surya Gentha Akmal; Chukwuka Moses Orji; Parth Arora; Ruiqi Li; P. M. Sohan; Rasheed B. Adesina; Christian Lindemann; Deqiang Ma; Saydul Sarkar; Martina Mascioni; Thiago Monteiro; Chao Liu; Renis Auma Ojwala; Matthew Vincent Tabilog; Kakaskasen Andreas Roeroe; Hafeez O. Oladejo; Samuel O. Daramola; Delio Da Costa; Ting Guo; Cristhian Chicaiza-Ortiz; Abiola A. Adebiyi; Md Rasel Ahmed; Aidah Baloch; Santiago Thome Andueza; Joseph Kofi Ansong; Sura Appalanaidu; Furqan Asif; Andrew Taylor Awa; Elnalee Baguya; Matheus Batista; Okeke Ebuka Benedict; Fulton Bobby; Peter Teye Busumprah; Marta Cardoso; Andrea da Consolacao de Oliveira Carvalho; Terrence Daniel Crea; Ky Channimol; Wee Cheah; Igbodiegwu Gloria Chinwendu; Alessia Dinoi; King-James I. Egbe; Joseph Eshun; Juan Diego Gaitan Espitia; Dorcas Akua Essel; Natalie Fox; Kate Fraser; Martina Gaglioti; Koren Gerbrand; Laura Gusatu; Diego Alexander Hernandez Contreras; Theddy-Michel Iradukunda; Zahor Mwalim Khalfan; Laura Khatib; Minkyoung Kim; Marta Koch; Jihua Liu; Shailendra K. Mandal; Soukphansa Manivong; Benedict McAteer; Chiamaka Linda Mgbechidinma; Thuy Hao Ngo; Manasi Suhas Nirmale; Ronnie Noonan Birch; Tolulope E. Oginni; Isa Elegbede Olalekan; Lord Offei-Darko; Viena Puigcorbe; Rishi Rajendra Gandhi; Mohammad Rozaimi; Edmond Sanganyado; Debarati Sengupta; Priyatma Singh; Dumpala Sridhar; N. Sunanda; Falguni Tailor; Beatriz Tintore; Okoli Moses Ugochukwu; Khanittha Uthaipan; O. Alejandra Vargas-Fonseca; Anmol Verma; Clara R. Vives; Sina Wallschuss; Lin Wang; Yuhao Wang; Yuntao Wang; Yabing Meng; Maria Schoenbeck; Wei Yan; Hanna Yen; Tingwei Luo
Early career ocean professionals' declaration on ocean negative carbon emissions for our ocean and future
INNOVATION, 08 Sep. 2025
6, 9

Hakase Hayashida; Peter G. Strutton; Fuminori Hashihama; Naho Horimoto-Miyazaki; Toshiya Katano; Saori Yasui-Tamura
Status and prospects of biogeochemical Argo observations of chlorophyll-a in the northwest Pacific
Journal of Oceanography, Aug. 2025
[Reviewed]
Lead, Corresponding

Hakase Hayashida; Yasumasa Miyazawa; Toru Miyama; Yuya Baba; Shoichiro Kido
Ocean weather forecasts
Oceanography in Japan, 15 Nov. 2024
33, 5-6, 89, 101
[Reviewed]
Lead, Corresponding

Richard A. Wood; Jonathan A. Baker; Grégory Beaugrand; Jacqueline Boutin; Alessandra Conversi; Reik V. Donner; Ivy Frenger; Eric Goberville; Hakase Hayashida; Wolfgang Koeve; Karin Kvale; Angela Landolfi; Wieslaw Maslowski; Andreas Oschlies; Anastasia Romanou; Christopher J. Somes; Thomas F. Stocker; Didier Swingedouw
Opportunities for Earth Observation to Inform Risk Management for Ocean Tipping Points
Surveys in Geophysics, Nov. 2024
[Reviewed]

Gabrielle Burke; Pat Wongpan; Delphine Lannuzel; Hakase Hayashida
Data collation for climate-cooling gas dimethylsulfide in Antarctic snow, sea ice and underlying seawater.
Scientific data, 31 Oct. 2024
11, 1, 1185, 1185
[Reviewed]

Yasumasa Miyazawa; Max Yaremchuk; Sergey M. Varlamov; Toru Miyama; Yu-Lin K. Chang; Hakase Hayashida
An ensemble-based data assimilation system for forecasting variability of the Northwestern Pacific ocean
Ocean Dynamics, 09 May 2024
[Reviewed]

Jiaxin Shi; Jules B. Kajtar; Hakase Hayashida; Sarah C. Ugalde
Relationships between high temperatures and Pacific Oyster disease and mortality in southeast Tasmania, Australia
Continental Shelf Research, Feb. 2024
273

Laurie Menviel; Paul Spence; Andrew Kiss; Matthew Chamberlain; Hakase Hayashida; Matthew H. England; Darryn Waugh
Enhanced Southern Ocean CO₂ outgassing as a result of stronger and poleward shifted southern hemispheric westerlies
Biogeosciences, 06 Nov. 2023
20, 21, 4413, 4431

Megan D. Willis; Delphine Lannuzel; Brent Else; Hélène Angot; Karley Campbell; Odile Crabeck; Bruno Delille; Hakase Hayashida; Martine Lizotte; Brice Loose; Klaus M. Meiners; Lisa Miller; Sebastien Moreau; Daiki Nomura; John Prytherch; Julia Schmale; Nadja Steiner; Letizia Tedesco; Jennie Thomas
Polar oceans and sea ice in a changing climate
Elem Sci Anth, 18 Oct. 2023

Denisse Fierro-Arcos; Stuart Corney; Amelie Meyer; Hakase Hayashida; Andrew E. Kiss; Petra Heil
Analysis of ecologically relevant sea ice and ocean variables for the Southern Ocean using a high-resolution model to inform ecosystem studies
Progress in Oceanography, Jul. 2023
215

Hakase Hayashida; Andrew E. Kiss; Toru Miyama; Yasumasa Miyazawa; Sayaka Yasunaka
Anomalous Nutricline Drives Marked Biogeochemical Contrasts During the Kuroshio Large Meander
Journal of Geophysical Research: Oceans, Jul. 2023
128, 7

Takano, Yohei; Ilyina, Tatiana; Tjiputra, Jerry; Eddebbar, Yassir; Berthet, Sarah; Bopp, Laurent; Buitenhuis, Erik; Butenschön, Momme; Christian, James; Dunne, John; Gröger, Matthias; Hayashida, Hakase; Hieronymus, Jenny; Koenigk, Torben; Krasting, John; Long, Matthew; Lovato, Tomas; Nakano, Hideyuki; Palmieri, Julien; Schwinger, Jörg; Séférian, Roland; Suntharalingam, Parvadha; Tatebe, Hiroaki; Tsujino, Hiroyuki; Urakawa, Shogo; Watanabe, Michio; Yool, Andrew
Simulations of Ocean Deoxygenation in the Historical Era: Insights from Forced and Coupled Models
Front. Mar. Sci., 2023
10

Hangyu Meng; Hakase Hayashida; Nor Hakim Norazmi-Lokman; Peter G. Strutton
Benefits and detrimental effects of ocean warming for Tasmanian salmon aquaculture
Continental Shelf Research, Sep. 2022
246, 104829, 104829

C. Mackallah; M. A. Chamberlain; R. M. Law; M. Dix; T. Ziehn; D. Bi; R. Bodman; J. R. Brown; P. Dobrohotoff; K. Druken; B. Evans; I. N. Harman; H. Hayashida; R. Holmes; A. E. Kiss; A. Lenton; Y. Liu; S. Marsland; K. Meissner; L. Menviel; S. O’Farrell; H. A. Rashid; S. Ridzwan; A. Savita; J. Srbinovsky; A. Sullivan; C. Trenham; P. F. Vohralik; Y.-P. Wang; G. Williams; M. T. Woodhouse; N. Yeung
ACCESS datasets for CMIP6: methodology and idealised experiments
Journal of Southern Hemisphere Earth Systems Science, Jul. 2022
72, 2, 93, 116

James R. Christian; Kenneth L. Denman; Hakase Hayashida; Amber M. Holdsworth; Warren G. Lee; Olivier G. J. Riche; Andrew E. Shao; Nadja Steiner; Neil C. Swart
Ocean biogeochemistry in the Canadian Earth System Model version 5.0.3: CanESM5 and CanESM5-CanOE
Geoscientific Model Development, 09 Jun. 2022
15, 11, 4393, 4424

Fuminori Hashihama; Shinya Kouketsu; Yoshiko Kondo; Yoshi N. Sasaki; Shusaku Sugimoto; Kazutaka Takahashi; Takeyoshi Nagai; Jun Nishioka; Hakase Hayashida; and Junya Hirai
Decadal vision in oceanography 2021: Mid-latitude ocean
Oceanography in Japan, 15 Nov. 2021
30, 5, 127, 154
[Reviewed]

Hakase Hayashida; Meibing Jin; Nadja S. Steiner; Neil C. Swart; Eiji Watanabe; Russell Fiedler; Andrew McC. Hogg; Andrew E. Kiss; Richard J. Matear; Peter G. Strutton
Ice Algae Model Intercomparison Project phase 2 (IAMIP2)
Geoscientific Model Development, 11 Nov. 2021
14, 11, 6847, 6861

Hakase Hayashida; Richard J. Matear; Peter G. Strutton; Xuebin Zhang
Insights into projected changes in marine heatwaves from a high-resolution ocean circulation model
Nature Communications, Dec. 2020
11, 1

Hakase Hayashida; Gauthier Carnat; Martí Galí; Adam H. Monahan; Eric Mortenson; Tessa Sou; Nadja S. Steiner
Spatiotemporal Variability in Modeled Bottom Ice and Sea Surface Dimethylsulfide Concentrations and Fluxes in the Arctic During 1979–2015
Global Biogeochemical Cycles, 09 Oct. 2020
34, 10

Hakase Hayashida; Richard J. Matear; Peter G. Strutton
Background nutrient concentration determines phytoplankton bloom response to marine heatwaves
Global Change Biology, 15 Sep. 2020
26, 9, 4800, 4811

Eric Mortenson; Nadja Steiner; Adam H. Monahan; Hakase Hayashida; Tessa Sou; Andrew Shao
Modeled Impacts of Sea Ice Exchange Processes on Arctic Ocean Carbon Uptake and Acidification (1980–2015)
Journal of Geophysical Research: Oceans, 28 Jul. 2020
125, 7

Eiji Watanabe; Meibing Jin; Hakase Hayashida; Jinlun Zhang; Nadja Steiner
Multi‐Model Intercomparison of the Pan‐Arctic Ice‐Algal Productivity on Seasonal, Interannual, and Decadal Timescales
Journal of Geophysical Research: Oceans, Dec. 2019
124, 12, 9053, 9084

Hakase Hayashida; James R. Christian; Amber M. Holdsworth; Xianmin Hu; Adam H. Monahan; Eric Mortenson; Paul G. Myers; Olivier G. J. Riche; Tessa Sou; Nadja S. Steiner
CSIB v1 (Canadian Sea-ice Biogeochemistry): a sea-ice biogeochemical model for the NEMO community ocean modelling framework
Geoscientific Model Development, 15 May 2019
12, 5, 1965, 1990

Jonathan P. D. Abbatt; W. Richard Leaitch; Amir A. Aliabadi; Allan K. Bertram; Jean-Pierre Blanchet; Aude Boivin-Rioux; Heiko Bozem; Julia Burkart; Rachel Y. W. Chang; Joannie Charette; Jai P. Chaubey; Robert J. Christensen; Ana Cirisan; Douglas B. Collins; Betty Croft; Joelle Dionne; Greg J. Evans; Christopher G. Fletcher; Mart{\'{\i } } Gal{\'{\i } }; Roghayeh Ghahremaninezhad; Eric Girard; Wanmin Gong; Michel Gosselin; Margaux Gourdal; Sarah J. Hanna; Hakase Hayashida; Andreas B. Herber; Sareh Hesaraki; Peter Hoor; Lin Huang; Rachel Hussherr; Victoria E. Irish; Setigui A. Keita; John K. Kodros; Franziska Köllner; Felicia Kolonjari; Daniel Kunkel; Luis A. Ladino; Kathy Law; Maurice Levasseur; Quentin Libois; John Liggio; Martine Lizotte; Katrina M. Macdonald; Rashed Mahmood; R; all V. Martin; Ryan H. Mason; Lisa A. Miller; Alex; er Moravek; Eric Mortenson; Emma L. Mungall; Jennifer G. Murphy; Maryam Namazi; Ann-Lise Norman; Norman T. O{\textquotesingle}Neill; Jeffrey R. Pierce; Lynn M. Russell; Johannes Schneider; Hannes Schulz; Sangeeta Sharma; Meng Si; Ralf M. Staebler; Nadja S. Steiner; Jennie L. Thomas; Knut von Salzen; Jeremy J. B. Wentzell; Megan D. Willis; Gregory R. Wentworth; Jun-Wei Xu; Jacqueline D. Yakobi-Hancock
Overview paper: New insights into aerosol and climate in the Arctic
Atmospheric Chemistry and Physics, 28 Feb. 2019
19, 4, 2527, 2560

Steiner, NS; Cheung, WWL; Cisneros-Montemayor, AM; Drost, H; Hakase Hayashida; Hoover, C; Lam, J; Sou, T; Sumaila, UR; Suprenand, P; Tai, TC; VanderZwaag, DL
Impacts of the changing ocean-sea ice system on the key forage fish arctic cod (Boreogadus saida) and subsistence fisheries in the Western Canadian arctic-evaluating linked climate, ecosystem and economic (CEE) models
Frontiers in Marine Science, 2019
6, APRIL

Eric Mortenson; Hakase Hayashida; Nadja Steiner; Adam Monahan; Marjolaine Blais; Matthew A. Gale; Virginie Galindo; Michel Gosselin; Xianmin Hu; Diane Lavoie; C. J. Mundy
A model-based analysis of physical and biological controls on ice algal and pelagic primary production in Resolute Passage
Elem Sci Anth, 24 Jul. 2017
5, 39, 39

Hakase Hayashida; Nadja Steiner; Adam Monahan; Virginie Galindo; Martine Lizotte; Maurice Levasseur
Implications of sea-ice biogeochemistry for oceanic production and emissions of dimethyl sulfide in the Arctic
Biogeosciences, 27 Jun. 2017
14, 12, 3129, 3155

Joint work
SOLAS 3.0: 2026-2035: Science Plan and Organisation　　　　　　　　　　　　　　　
SOLAS International Project Office, State Key Laboratory of Marine Environmental Science (Xiamen University), Xiamen, Feb. 2026

Hakase Hayashida; Takeshi Doi; Haruto Fujishima; Shoichiro Kido; Yasumasa Miyazawa
Parameter identification and optimization of an ocean biogeochemical model for sub-seasonal to seasonal prediction
PICES-2025, 13 Nov. 2025

Haruto Fujishima; Hakase Hayashida
Analysis-ready BGC-Argo dataset
Japan Oceanographic Society Fall Meeting 2025, 24 Sep. 2025

Hakase Hayashida; Haruto Fujishima; Shoichiro Kido; Yasumasa Miyazawa
Progress toward BGC-Argo data assimilation: tuning and testing using a one-dimensional model
BACO 2025, Jul. 2025

Haruto Fujishima; Hakase Hayashida
Generating analysis-ready BGC-Argo datasets using Jupyter Notebook
JpGU 2025, 27 May 2025

Hakase Hayashida
What if we can predict phytoplankton blooms two months in advance?　　　　　　　　　　　　　　　
FEC-SIMSEA Joint Youth Seminar, 13 May 2025, [Invited]

Hakase Hayashida
Progress towards operational prediction of ocean biogeochemistry in the northwest Pacific (and beyond)　　　　　　　　　　　　　　　
AIMEC Science Salon, 14 Jan. 2025, [Invited]

Hakase Hayashida; Peter G. Strutton; Fuminori Hashihama; Naho Horimoto-Miyazaki; Toshiya Katano; Saori Yasui-Tamura
From biogeochemical Argo to short-term prediction
Japan Oceanographic Society Fall Meeting 2024, 17 Sep. 2024

Hakase Hayashida; Martí Galí; Daniela A. del Valle; Stephen D. Archer; Hermann W. Bange; Eva Bucciarelli; Elisabeth S. M. Deschaseaux; José M. González; Frances E. Hopkins; Sohiko Kameyama; Brandon McNabb; Erin L. McParland; Ki-Tae Park; Damodar Shenoy; Jacqueline Stefels; Jonathan D. Todd; Lenny H. E. Winkel; Gui-Peng Yang; Marcos Zárate; Miming Zhang
DMS-PRO: Developing resources for the study of Methylated Sulfur compound cycling PROcesses in the ocean
JpGU 2024, 28 May 2024

林田博士; 宮澤泰正; 美山透; 馬場雄也; 木戸晶一郎
海中天気予報の魅力　　　　　　　　　　　　　　　
JpGU, 26 May 2024

Hakase Hayashida; Peter G. Strutton; Fuminori Hashihama; Naho Horimoto-Miyazaki; Toshiya Katano; Saori Tamura-Yasui
Assessment of remote ocean chlorophyll observations and prospects for operational forecasts
International Conference on Marine Science & Aquaculture (ICOMSA), 16 May 2024

Hakase Hayashida
Development of biogeochemical modelling for the northwest Pacific
The 2nd UN Ocean Decade Regional Conference & the 11th WESTPAC International Marine Science Conference, 24 Apr. 2024

Hakase Hayashida
Prospects for operational ocean biogeochemical forecasting at APL　　　　　　　　　　　　　　　
APL-CCC Workshop on Understanding and predicting climate extremes in Arabian Peninsula, 04 Apr. 2024

Apr. 2024 - Present
Japan Geophysical Union (JpGU)　　　　　　　　　　　　　　　

Apr. 2022 - Present
日本海洋学会