Activities

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Global ONCE's Upcoming Events at OOSC and the United Nations Ocean Conference 2025: A Preview

Town hall meetings – TM12

Enhanced Carbon Dioxide Removal Through Ocean Negative Carbon Emission Approaches
Convener: Chuanlun Zhang | Co-convener: Eliza Northrop, Steve Giovannoni, Lina Hansson, Juan Buceta
Time:
Wed, 04 Jun, 12:45–13:45
Location: Port Lympia, Room 1

Session description

As global warming intensifies, innovative carbon dioxide removal (CDR) technologies are increasingly recognized as critical and marine CDR (mCDR) or ocean negative carbon emission (ONCE) approaches have shown great potential for using the ocean reservoirs for long term carbon sequestration. On the other hand, such technologies need to be developed and applied with a strong sense of responsibility, transparency, equitability, and inclusiveness, to ensure minimal negative impacts on the marine environment. This town hall event aims to bring together scientists, engineers, private sector leaders, governmental officials, and philanthropists to discuss the current state of mCDR research and explore strategies to implement and scale ONCE technologies in alignment with global climate goals and to safeguard marine ecosystem services. In particular, the town hall session will address the growing interest in Ocean Alkalinity Enhancement (OAE), and the need for responsible research, transparent data sharing, and international coordination to ensure that these technologies are implemented equitably with appropriate monitoring, reporting and verification (MRV) put into place. This exchange of ideas is crucial for advancing mCDR research and ONCE technologies, prioritizing both scientific rigor and environmental protection. By leveraging public-private partnerships and fostering cross-sectoral collaboration, the event will help accelerate the development and responsible research into and deployment of mCDR, enhancing its potential to contribute to global climate resilience that can be sustained by an equitable and robust carbon market.

Science Session

Theme 2: Effectiveness, equitability and safety of ocean-based approaches to reach the mitigation and adaptation goals of the Paris Climate Agreement
Time：June 4,14：00-17：30
Location: Port Lympia, Room 2

Session description

The ocean plays a pivotal role in mitigating climate change, absorbing about 25% of anthropogenic CO2 emissions and most of the excess heat resulting from changes in the Earth’s radiative imbalance. However, this immense climate mitigation service comes at the expense of profound alterations in its physical, chemical and biological environment. With record high temperatures, acidification, deoxygenation and sea level rise, and associated increase in extreme events such as marine heatwaves, the ocean faces unprecedented challenges. Climate change is already impacting marine biodiversity, ecosystem services, and human communities that are dependent on them. Vulnerable ecosystems and people are also at high risk of climate impacts in the next decades from committed climate change. In response to the urgency of combating climate change, there is a growing interest in exploring ocean-based carbon dioxide removal strategies and alternative renewable energy sources, as well as adaptation and resilience-building interventions for natural and human systems. However, the potential, benefits, side-effects and risks associated with these strategies and options remain largely unknown, both for marine ecosystems and for society at large.


Azam Symposium

Azam Symposium on Microbial Structuring of Marine Ecosystems and Global Carbon Cycle
Time：June 5,16:45-19:30
Location: The Whale—Auditorium

Session description

The Azam Symposium celebrates transformative advances in marine ecology, with particular emphasis on their critical connections to oceanic carbon sequestration and global climate change. This event will examine paradigm shifts in biological oceanography over the past four decades, driven by three pivotal conceptual frameworks: the biological carbon pump, the microbial loop, and the microbial carbon pump. These interconnected paradigms have fundamentally reshaped our understanding of marine carbon cycling, revealing how biological processes govern the transport, storage, and fate of organic carbon in the ocean. By synthesizing historical insights and contemporary discoveries, the symposium will highlight the evolving role of marine ecosystems in climate regulation and explore future directions for research and policy in this urgent interdisciplinary field.

UNOC3 Side Event

This side event highlights global collaborative research on ocean-based carbon dioxide removal (mCDR) and its relationship with the conservation and sustainable use of the ocean in line with SDG 14.
Time：June 9,15:45-17:00
Location:Blue Zone Port Lympia, Room 1

Session description

To keeping global temperature increase below 1.5ºC by the end of this century, an international community teaming with the Global Ocean Negative Carbon Emissions program aims to address the most critical issues facing the marine sustainable development. Here, we announce commitments for sharing information and data on: 1. Land-Ocean Integration: Reducing land fertilization and actively restoring blue carbon habitats to improve the efficiency of ocean carbon sequestration and the resilience of coastal habitats. 2. Sea-Farming ‘Fields’: Controlling algal blooms and enhancing carbon sequestration through artificial upwelling, optimizing multiple carbon pump processes. 3. Ocean Alkalinity Enhancement: Applying geological materials to increase seawater
The event will feature high-level leaders from the United Nations, China, the European Commission, France, Monaco, and representatives of the Ocean Panel. The event will include: A 5-min introduction by a high-level UN representative (Thomson); a 30-min science session led by world-renowned experts (Boyd, Gattuso, Jiao, and Webb), addressing practices and key issues from recent collaborative efforts on mCDR; a 25-min panel discussion on monitoring, reporting, verification and governance of mCDR; a 15-min open discussion with the audience leading to ocean literacy and capacity building of mCDR.
Agenda

Scan the following QR code to learn about the event schedule and other Global ONCE related activities:


Event Webpage

https://one-ocean-science-2025.org/

https://sdgs.un.org/conferences/ocean2025/side-events


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