Prospects and Challenges of Investigating Ocean-Based Negative Emission Technologies: Insights from the OceanNETs Project

This OceanNETs synthesis report offers a condensed synopsis of major outcomes and key conclusions obtained from the different work packages of the project. It is designed to inform and engage scientists across a wide range of disciplines, thereby contributing to capacity building in the field of marine carbon dioxide removal (CDR). It synthesizes the complex findings of OceanNETs in a condensed format. Alongside the synthesis of key insights, the report provides direct references and links to the full suite of OceanNETs deliverables and peer-reviewed publications, enabling readers to further explore the underlying data, methodologies, and details of the analyses. The introduction, which provides general information about the project, is followed by key messages that convey important lessons learned, points out significant findings, and provides recommendations for possible actions and research activities. Thereafter, the report provides a summary of insights documented in greater detail in OceanNETs deliverables and publications. That part is split into two thematic sections: Section A addresses Society and ONETs, and section B covers Scalability and responses to ONETs (OAE). Each section is further divided into research topics, each of which first provides information on the research approaches and then describes key findings. This synthesis report closes with a series of synopses presented in the form of four ONET research briefs. They provide more complementary and comprehensive insights that go beyond the outcomes of OceanNETs by incorporating results from other relevant publications and reports that often emerged in parallel during the course of the project.