Ocean Acidification Week 2025
OA Week is a virtual multi-day forum highlighting ocean acidification knowledge from around the world. Stay tuned for more information about opportunities to get involved, session topics, speakers, and more!
Monday 13 October - Friday 17 October 2025
Goals
Rising to the challenge of ocean acidification: using science and knowledge to drive action
OA Week debuted in 2020, and returned in 2021, when events and conferences were postponed due to COVID-19. Following the successful in-person Symposium on the Ocean in a High CO2 World in 2022, GOA-ON brought back OA Week in 2023 to maintain momentum around OA research and provide a virtual platform for the ocean acidification community to exchange their latest findings. Since then, OA Week has been an annual GOA-ON tradition with an overarching goal of strengthening cross-regional connections and collaboration among the OA research community.
This virtual symposium will bring together researchers around the world with sessions, plenary speakers, and engaging discussions about ocean acidification research. If you have specific questions or suggestions, please contact us at secretariat@goa-on.org.
Image Credit: Kimberly Jeffries/ Ocean Image Bank
Schedule
13 October
ICONA Research: From Understanding and Predicting to Action
Monday
13 October 2025 at 7:00 UTC View in various time zones
The International CO2 Natural Analogues Network (ICONA) project aims at facilitating innovative research on the ecosystem-level effects of ocean acidification using natural analogues. This allows us to efficiently disseminate the findings that can underpin adaptive management strategies in order to mitigate the impacts of rapidly changing ocean conditions.
Additional speakers and titles to be confirmed.
Moderator(s)
Sylvain Agostini
Entropie, IRD, New Caledonia
Speakers
Britta Fiedler
PhD student University of the Ryukyus
Potential winners of ocean acidification: Benthic communities at a CO₂ vent in Papua New Guinea
Michael Izumiyama
Postdoctoral Researcher, University of the Ryukyus
Exploring volcanic CO₂ seeps to determine the genomic responses of fishes to ocean acidification
Marco Milazzo
University of Palermo
Arctic Hub
Monday
13 October 2025 at 9:00 UTC View in various time zones
The Arctic Hub session will present new insights into Arctic Ocean acidification on various aspects such as observations, case studies, biological effect studies, and modelling.
Speakers
Yun Li
University of Delaware, USA
Beyond Long-Term Trend: Interannual Variability of Oceanic Carbon Uptake due to Sea Ice Loss in the Western Arctic Ocean
Sayaka Yasunaka
Tohoku University, Japan
CO2 uptake in the Arctic Ocean
Henry Henson
Aarhus University, Denmark
Glacial meltwater increases coastal carbon dioxide uptake and sensitivity to biogeochemical change
Ahra Mo
KOPRI, Korea
pCO2 variability in the Ice-Covered Arctic Ocean
North East Atlantic Hub
Monday
13 October 2025 at 13:00 UTC View in various time zones
Speakers and titles to be confirmed.
14 October
Research in Emerging Regions - Community Discussion
Tuesday
14 October 2025 at 8:00 UTC View in various time zones
Ocean acidification experts from Egypt, South Africa, Namibia, the Pacific Islands, and Argentina share experiences in establishing and running monitoring programs in emerging regions. Panelists discuss institutional approaches to data collection, motivations for starting monitoring, and regional research priorities. Technical and logistical challenges, including sensor maintenance, sample transport, and access to resources, are highlighted alongside innovative solutions. Audience interaction encourages knowledge exchange and comparison of experiences. Key takeaways will provide practical insights for strengthening regional OA monitoring networks, improving data quality, and supporting global efforts to understand and respond to ocean acidification.
Moderator(s)
Paula Elaine Sacheus
University of Namibia and Kelp Forest Foundation
Speakers
Carla Florencia Berghoff
Instituto Nacional de Investigación y Desarrollo Pesquero (INIDEP)
Carla Edworthy
Nelson Mandela University, South Africa
Nayrah Shaltout
National Institute of Oceanography and Fisheries, Egypt
Secilia Shilongo
Ministry of Fisheries and Marine Resources, Namibia
Azaria Pickering
Pacific Community - SPC
Beyond Dissolving Shells: Innovative and Collaborative Ways To Improve OA Education
Tuesday
14 October 2025 at 13:00 UTC View in various time zones
We all know the classic outreach experiment of dissolving shells in vinegar to explain Ocean Acidification. This session aims to give a snapshot of what is happening around the world in OA education, sharing examples of innovative approaches, and better understanding the challenges and needs for OA education.
After short talks from our speakers, there will be a panel Q&A and discussion. Finally, we will invite you to engage with the session in an interactive audience experience.
Moderator(s)
Liz Perotti
NOAA Ocean Acidification Program
Speakers
Amy Kenworthy
Probleu
Making Ocean Acidification Relevant and Engaging for School Audiences
Alex Zimmerman
Indiana University
Game-based learning for ocean acidification: an open-source example using 'Ocean Protector'
Sam Dupont
University of Gothenburg & Ocean Acidification International Coordination Center
Beyond knowledge transfer - sensory experience and emotional connection as gateways to action to address ocean acidification
Jessie Turner
OA Alliance, United Nations Foundation
Paola Diaz
IOCARIBE-UNESCO
Francesca Santoro
IOC-UNESCO
Bridging Science and Society: Ocean Literacy for Collective Action
OARS Framework for Action: An Introduction to Co-Designing Ocean Acidification Research for Decision Making Under the UN Decade of Ocean Science
Tuesday
14 October 2025 at 15:00 UTC View in various time zones
In order to encourage a diversity of OA actions across different scales, OARS has developed a framework for co-designing OA Information for Action. The framework identifies categories that guide various user groups in navigating the best opportunities to harness linkages between climate-ocean change science and policy priorities.
Learn about the OARS Decision-Making Framework Working Group which will focus on opportunities to promote the Framework at key events and utilize, apply or improve the framework across relevant projects and case studies in 2026.
We’d love to have you join us!
Moderator(s)
Edith Mari
International Alliance to Combat Ocean Acidification (OA Alliance)
Speakers
Sam Dupont
University of Gothenburg
Punyasloke Bhadury
Indian Institute of Science Education and Research (IISER) Kolkata
Caribbean Hub
Tuesday
14 October 2025 at 17:00 UTC View in various time zones
The OA Caribbean Hub was established in 2023 following a Caribbean OA Needs Based Assessment Survey. The Global Ocean Acidification Observing Network (GOA-ON) has encouraged grass-roots formation of regional hubs to foster communities of practice for the efficient collection of comparable and geographically distributed data to assess ocean acidification and its effects, and to support adaptation tools such as model forecasts. Join us to learn about ocean acidification research and policy in the Caribbean!
Moderator(s)
Dr. Debbie-Ann Gordon-Smith
The University of the West Indies, Mona, Jamaica
Speakers
Dr. Isaiah Bolden
Georgia Institute of Technology
Hidden Ecological Messages within the Chemical “Heartbeat” of Caribbean Reef Ecosystems
Dr. Natalia López Figueroa
Gulf Coastal Ocean Observing System (GCOOS)
Dr. Marko Tosic
IOCARIBE of IOC (UNESCO)
UN Ocean Decade and Ocean Policy in the Wider Caribbean
15 October
6th International Symposium on the Ocean in a High CO2 World Community Meeting
Wednesday
15 October 2025 at 7:00 UTC View in various time zones
The 6th International Symposium on the Ocean in a High CO2 World will be held in Te Whanganui-A-Tara Wellington, Aotearoa New Zealand, 12th-16th October 2026. In this session the organising committee seeks input from the international community to ensure the conference meets the needs of the participants. The session will be interactive, consisting of polls and breakout groups to determine session formats, topics, and what workshops, training, or ECR opportunities could be included.
Speakers
Dr. Christopher Cornwall (Local Organising Committee Chair)
Victoria University of Wellington | Te Herenga Waka
Dr. Christina McGraw (Local Organising Committee Deputy Co-Chair)
University of Otago
Dr. Rachel Hale (Local Organising Committee Deputy Co-chair)
Earth Sciences New Zealand
Dr. Sam Dupont (International Organising Committee
University of Gothenburg & Ocean Acidification International Coordination Center
Lina Hansson
International Atomic Energy Agency Ocean Acidification International Coordination Center
SAROA Hub
Wednesday
15 October 2025 at 11:00 UTC View in various time zones
The South Asia Regional Hub on Ocean Acidification (SAROA) was established to cover the countries surrounded by regional seas and oceans across South Asia. Participating countries include India, Sri Lanka, Bangladesh, Myanmar, Malaysia, Maldives, Pakistan and Oman. SAROA was established to promote the practice of collection of geographically distributed data on ocean acidification encompassing South Asian waters including from vulnerable yet ecologically important coastal biotopes such as mangroves, estuaries, salt marshes, lagoons and coral reefs. SAROA intends to promote the development of national hubs for effective monitoring of OA and carry out capacity building activities geared towards early career researchers.
Speakers and titles to be confirmed.
Mentorship Perspectives: Strengthening Science Capacity Through Relationship Building
Wednesday
15 October 2025 at 13:30 UTC View in various time zones
Mentorship programs can support equitable capacity and career development across a spectrum of ocean professions. Personalized guidance from a mentor can help mentees build their professional networks, develop practical skills, and grow to be leaders in their field. In this session, we’ll hear from program coordinators, mentors, and mentees, to discuss the role of mentorship in building a career in ocean science and industry.
Moderator(s)
Carly LaRoche
GOA-ON Secretariat
Speakers
Comfort Opoku
Department of Marine and Fisheries Sciences, University of Ghana | Pier2Peer Alumna
Dr. Sally Salaah
National Institute of Oceanography and Fisheries, Egypt | Women in Marine Science (WiMS) Womentoring Program
Meagan Gary
The Ocean Foundation
Co-development of Research
Wednesday
15 October 2025 at 15:00 UTC View in various time zones
This session will focus on co-development of ocean acidification research in different local and regional contexts. We will hear from researchers on the ground in Africa, Asia and North America. Speakers will discuss what co-development means to them and will cover best practices, as well as obstacles and challenges.
Moderator(s)
Erica Ombres
NOAA OAP
Alexandra Puritz
UCAR
Speakers
Jan Newton
University of Washington
Magak Adell
Global Coast Pilot Sites, Kenya
Punyasloke Bhadury
Indian Institute of Science Education and Research Kolkata, India
North American Hub
Wednesday
15 October 2025 at 18:00 UTC View in various time zones
The North American Hub is one of the earliest formed hubs within GOA-ON and it includes over 225 members from Canada, the US, and Mexico. The North American Hub has been integral to GOA-ON, with members serving not only within the hub, but also as GOA-ON Co-Chairs and Secretariat members. The theme of the 2025 GOA-ON OA week sessions is ‘Rising to the challenge of ocean acidification: using science and knowledge to drive action’. This year’s sessions will focus on new information on the OA science, knowledge mobilization and action from Canada, Mexico, and the US.
Moderator(s)
Dr. Helen Gurney-Smith
Fisheries and Oceans Canada
Speakers
Kristina Barclay
Canadian Ocean Acidification Community of Practice, Tula Foundation, Canada
The state of Canada’s ocean acidification knowledge
Leticia Espinosa Carreon
Instituto Politécnico Nacional CIIDIR Sinaloa, Mexico
Advances in the understanding of the carbonate system in the Mexican Tropical Pacific
Kate Hewett
University of Washington, USA
Patterns in Corrosive Water Across the Washington and Oregon Shelf
16 October
Southern Ocean Carbon Through Time
Thursday
16 October 2025 at 10:00 UTC View in various time zones
The Southern Ocean plays a central role in global carbon cycling and is an important carbon sink. However, it also ranks amongst the most vulnerable oceanic region to acidification, with observations showing that open waters across the Southern Ocean have experienced faster rates of acidification over the past four decades than non-polar waters. Bringing together water chemistry, biology and paleo data, this webinar will explore and discuss the temporal patterns and pathways of carbon in the Southern Ocean across various time scales.
Moderator(s)
Katherina Petrou
University of Technology Sydney, Australia
Speakers
Dr. Elizabeth Shadwick
CSIRO, Tasmania, Australia
The Southern Ocean Time Series (SOTS): the emergence of trends in upper ocean biogeochemistry
Dr. Clara Manno
British Antarctic Survey, UK
From Shell to Sink: Seasonal Pteropod Dynamics and Their Role in Carbon Export in the Southern Ocean
Dr. Jessie Turner
Old Dominion University, VA, USA
Changing phenologies of chlorophyll and surface ocean carbon uptake in the West Antarctic Peninsula region of the Southern Ocean
Dr. Carles Pelejero
ICREA and Institut de Ciències del Mar, CSIC, Barcelona, Spain
Southern Ocean carbon rhythms: Glacial-Interglacial pH, CO₂ exchange, and calcifiers
OA Med Hub
Thursday
16 October 2025 at 13:00 UTC View in various time zones
The Mediterranean Ocean Acidification Hub is a network that connects Mediterranean scientists who are working and are interested in ocean acidification in the Mediterranean Sea. The OA Mediterranean Hub includes scientists from fourteen countries in the region: Algeria, Croatia, Cyprus, Egypt, France, Greece, Italy, Lebanon, Malta, Morocco, Slovenia, Spain, and Türkiye.
Speakers and titles to be confirmed.
mCDR: Impacts and Opportunities for Ocean Acidification
Thursday
16 October 2025 at 16:00 UTC View in various time zones
In addition to strong emission reductions, Carbon dioxide removal (CDR) strategies may become critical to avoid exceeding the temperature limits of the Paris Agreement. Robust and optimised monitoring is essential to enable reliable carbon accounting and guarantee the capacity to continuously and consistently detect the early emergence of CDR-related signals and potential side-effects. In this session we will hear from researchers across the world working to advance our knowledge on the potential opportunities and biogeochemical impacts of marine CDR, particularly concerning ocean acidification.
More speakers to be announced.
Moderator(s)
Ana C. Franco
Barcelona Supercomputing Center
Speakers
Brendan Carter
UW/CICOES
Monitoring and modeling for ocean alkalinity enhancement in the Pacific Northwest
Nina Bednaršek
Jožef Stefan Institute, Slovenia
Patrick Duke
Carbon Run
PI-TOA Session
Thursday
16 October 2025 at 21:00 UTC View in various time zones
The PI-TOA (Pacific Islands & Territories Ocean Acidification) Network works collectively to better understand and combat the impacts of ocean acidification in the region. As capacity for ocean acidification monitoring increases in the region, there is an increasing need for collaboration and communication among the various islands and territories.
Speakers
Sebastiaan van de Velde
University of Otago
Anthropogenically stimulated carbonate dissolution in the global shelf seafloor is an important and fast climate feedback
Rachel Hale
Earth Sciences New Zealand
Future actions for the ocean acidification research community of the Pacific
Conference Local Organising Committee
Te Whanganui-a-Tara Wellington, Aotearoa New Zealand
The Ocean in a High CO2 World Symposium, 12-16th October 2026
17 October
International Carbon Ocean Network for Early Career (ICONEC) Community Meeting
Friday
17 October 2025 at 0:00 UTC View in various time zones
Are you an early career ocean professional looking for community within the OA world? Then the ICONEC community may be for you! Join us for an ICONEC Community Meeting during OA Week to learn about ICONEC’s goals and activities and see how you can get involved in OA research as an early career. We’ll also host Christina McGraw, a representative from The Ocean in a High CO2 World Planning Committee, to discuss the role of early career scientists at the upcoming 2026 International Symposium.
More speakers to be announced.
Speakers
Conference Local Organising Committee
Te Whanganui-a-Tara Wellington, Aotearoa New Zealand
The Ocean in a High CO2 World Symposium, 12-16th October 2026
Turning Science Into Policy: Advancing Ocean Acidification Action in Africa
Friday
17 October 2025 at 11:00 UTC View in various time zones
Moderator(s)
Sheck Sherif
Nayrah Shaltout
Roshan Ramessur
Speakers
George Rushingisha
Frédéric Bonou
Joseph Charles
Samuel Koenig
Anthony Akpan
Marine Organism Response to Multiple Environmental Stressors
Friday
17 October 2025 at 13:00 UTC View in various time zones
Environmental stressors rarely occur in isolation, and as such, it is crucial to understand how multiple stressors interact in order to accurately predict and protect marine organisms under a changing climate. The goal of this session is to share knowledge on ongoing ocean acidification research across diverse marine organisms, with a focus on how additional environmental stressors shape their responses. We will explore the synergistic stressors facing marine organisms, and delve into specific marine organism responses to combined stressors
Speakers
Sally Salaah
National Institute of Oceanography and Fisheries, Egypt
Ocean Acidification and Emerging Pollutants: Synergistic Stressors Challenging Marine Organisms
Emma Pontes
University of Miami, Cooperative Institute for Marine and Atmospheric Studies
The physiological impact of ocean acidification and hypoxia on Orbicella faveolata
Dr. Doaa A. Kassem
National Institute of Oceanography and Fisheries, Egypt
The Impact of Ocean Acidification and Multiple Stressors on Microalgae and Macroalgae
LAOCA Session
Friday
17 October 2025 at 15:00 UTC View in various time zones
The Latin American and Caribbean (LAOCA) Network integrates the activities of the Latin American participants active in GOA-ON, representing the importance of the diversity of Latin American ecosystems, the richness of marine organisms in large coastal and oceanic regions vulnerable to the deleterious effects of increased carbon dioxide (CO2) absorption by oceans, and the social, economic, and political impacts of ocean acidification.
Moderator(s)
Cecilia Chapa Balcorta
Universidad del Mar, Oaxaca, México
Speakers
Valentina Amaral
Universidad del Magdalena, Colombia
Carbonate chemistry variability and environmental conditions influencing coral reef composition along the Pacific coast of Costa Rica
Natalia Rincón Diaz
Universidad del Magdalena, Colombia
Carbonate chemistry variability and environmental conditions influencing coral reef composition along the Pacific coast of Costa Rica
Luzmery Jiménez
Universidad Tecnológica de Panamá, Panamá
Carbonate system variability and its role in acidification and hypoxia in tropical mangroves and estuaries
Celeste Sanchez Noguera
Universidad de Costa Rica, Centro de Investigación en Ciencias del Mar y Limnología, Costa Rica
Environmental conditions and carbonate chemistry variability influencing coral reef composition along the Pacific coast of Costa Rica
Alejandro Preciado
Universidad de Zhejiang, China
Variabilidad espacio temporal anual de TA, DIC y OA (pH y pCO2) en el Parque Nacional Natural Gorgona, Pacífico tropical oriental de Colombia, bahía de Panamá, durante un fuerte episodio de La Niña
Technology Development in Ocean Acidification Research
Friday
17 October 2025 at 15:00 UTC View in various time zones
Ocean acidification research faces numerous challenges stemming from high spatiotemporal variability, subtle long-term trends, and complex species responses. Addressing these issues requires high-precision measurement of multiple carbonate parameters across space and time, coupled with high-replication assessments of biological sensitivities. Technical, financial, and logistical hurdles remain, but emerging technologies are helping to close these gaps. This session will highlight advances in sensor technologies, autonomous platforms for large-scale monitoring, and open-source experimental systems designed to enable high-replication acidification research. Collectively, these innovations are accelerating our ability to understand and respond to ocean acidification.
Moderator(s)
Molly Phillips
University of Southampton, United Kingdom
Speakers
Ian Enochs
Atlantic Oceanographic and Meteorological Laboratory, National Oceanic and Atmospheric Administration
Advancing marine species sensitivity research: open, scalable tools for ocean acidification and multistressor studies
Emily Hammermeister
University of Southampton, United Kingdom
Validating pH sensors on Long Distance Autonomous Deployments
Dr. Zhaohui Aleck Wang
Woods Hole Oceanographic Institution
Simultaneous In-Situ Measurements of Dissolved Inorganic Carbon and pH across Versatile Deployment Platforms
Yui Takeshita
Monterey Bay Aquarium Research Institute
Previous OA Weeks
Excited to dive in? You can view sessions from previous OA Weeks on the GOA-ON Youtube Channel.
Coordinators
The GOA-ON Secretariat is tremendously grateful for the support with the organisation of OA Week 2025. Our OA Week Coordinators, Magak Adel, Maisy Lus, and Molly Phillips, are assisting with session and speaker organisation. ICONEC Steering Committee member Natalie del Carmen Bravo Senmache is the OA Week Graphic Designer, creating the visuals for OA Week.
Meet our amazing OA Week Coordinators:
Magak Adell
Magak Adell is a marine geologist working on the Kenyan Coast Seascape currently serving as the lead partner in the Global Coast Pilot Sites, Kenya. An initiative under the Ocean Decade Program Coast Predict and lead by CMCC Foundation, Magak's area of research revolves around three primary impact areas:
Impact Area 1: Capacity in disaster risk reduction through real-time forecasting of extreme events including, but not limited to, sea level, marine heat waves, algal biomass blooms and oxygen at coastal scales and mCDR work. Impact Area 3: Prevention and mitigation of pollution impacts through pollution hazard/risk mapping and forecasting at coastal scales including, but not limited to, loss of biodiversity, human health, etc. Impact Area 7: Sustainable food production through coastal mariculture support system. His research work drives action by integrating science and knowledge towards the rising challenge of ocean acidification.
Maisy Lus
Maisy Lus is a MSc Applied Marine Science student at the University of Plymouth. Her work spans blue carbon ecosystems, ocean acidification, and nature-based coastal protection, with field experience in mangrove restoration and reef-island resilience. She is the founder of the Coastline Care Project in Papua New Guinea and serves as Executive Director for Fish Reef Project PNG, driving community-led marine conservation. Maisy is passionate about empowering coastal communities and fostering international collaboration to safeguard ocean health.
Molly Phillips
Molly Phillips is a final year PhD researcher from University of Southampton, UK. Her work involves the development and deployment of a novel autonomous total alkalinity sensor; a multidisciplinary mix of engineering and marine biogeochemistry. Molly is passionate about making marine research accessible to her community, and has created courses and festival exhibits to engage the public with ocean science.
Natalie del Carmen Bravo Senmache
Natalie del Carmen Bravo Senmache graduated in Biology, with a focus in Fisheries Biology, based at the Pedro Ruiz Gallo National University in Lambayeque, Peru. Her work has focused on the carbonate system in coastal areas and the impacts of acidification, and other stressors, on calcifying organisms. Additionally, she has used biology and ecology to inform the management of marine resources and search for adaptation and mitigation alternatives in response to climate change. In parallel to her academic work, she also dedicated herself to supporting initiatives to strengthen networks and capacities through her participation in International Carbon Ocean Network for Early Career (ICONEC), Research Network of Marine-Coastal Stressors in Latin America and the Caribbean (REMARCO), and the Peruvian Oceanography network and most recently as the representative of Peru/Ecuador and Early Career in Latin American Ocean Acidification Network (LAOCA) Executive Council.