Early career ocean professionals' declaration on ocean negative carbon emissions for our ocean and future
This paper highlights the urgent need to accelerate research and action on ocean carbon sinks through human intervention, known as the Global Ocean Negative Carbon Emissions (Global-ONCE) Programme, as a vital strategy in global efforts to mitigate climate change. Achieving “net zero” by 2050 cannot rely on emission reductions alone, emphasizing the necessity of complementary approaches. Global-ONCE’s mission extends beyond scientific exploration. It embodies a profound commitment to protecting and restoring blue carbon ecosystems, as well as implementing ocean-based solutions that are sustainable, equitable, and inclusive. Early career ocean professionals (ECOPs) are at the heart of these efforts, and their innovative approaches, technical expertise, and passion make them indispensable leaders in advancing ONCE initiatives. ECOPs bridge the gap between science and society, playing a relevant role in integrating cutting-edge research, technological advancements, and community-driven action to address climate threats. By bringing together diverse perspectives and leveraging their interdisciplinary expertise, ECOPs ensure that ONCE strategies are grounded in scientific rigor and practical feasibility. Through advocacy, education, and collaboration, ECOPs not only spearhead research and innovation but also inspire collective action to safeguard our oceans. This paper amplifies the critical role of ECOPs as agents of change and calls for a unified global commitment to harness the ocean’s potential for a climate-resilient future.
Introduction
Through various international conferences (e.g., the United Nations Ocean Conferences and the Integrated Marine Biosphere Research [IMBeR] IMBIZO conferences) and regional workshops (e.g., the Asia-Pacific Climate Week and the Southern Ocean Observing System symposium), the early career ocean professionals (ECOP) programme has emerged as a prominent advocate for ocean conservation and climate action. ECOPs drive transformative changes and work toward a sustainable future for our oceans and planet through advocacy, innovation, and collaboration.
The global ocean plays a crucial role in the Earth’s climate system, significantly mitigating climate change through its capacity to act as a heat and carbon sink while shaping atmospheric and biogeochemical circulation patterns. It is essential for maintaining climate stability. However, anthropogenic impacts have progressively undermined the ocean’s efficacy in performing its natural functions.4 Thus, initiating coordinated scientific and technological action is paramount to tackling climate change. In response to this need, the Global Ocean Negative Carbon Emissions (Global-ONCE) programme was established in June 2022 under the United Nations Decade of Ocean Science for Sustainable Development (2021–2030). This international programme aggregates 79 research groups from 33 countries, engaging over 1,500 dedicated participants. Global-ONCE advocates for negative carbon emission strategies and develops ecological geoengineering solutions that are scientifically sound, reasonable, and legally compliant.5 It is dedicated to advancing the harmonious coexistence between humanity and the marine ecosystem, fostering an ecologically sustainable civilization. In June 2025, Global-ONCE co-released the OOSC (One Ocean Science Congress) manifesto “Science for Ocean Action,” which presents actionable scientific recommendations ahead of the Third United Nations Ocean Conference to guide global ocean stewardship and climate solutions.
