About this book:

"Oceans and Climate Change: Past, Present, and Future Interactions" synthesizes extensive scientific evidence to illustrate the ocean's fundamental role in regulating Earth's climate and its vulnerability to anthropogenic change. The book traces ocean-climate feedbacks from deep geological history through glacial-interglacial cycles and abrupt events, utilizing marine paleoclimate archives to establish context for current and projected changes. It then examines the industrial era, detailing how modern observations from ships, satellites, and autonomous systems have unequivocally documented accelerating trends in ocean heat uptake, sea-level rise through thermal expansion and ice melt, and the profound chemical shift of ocean acidification, alongside deoxygenation.

The book delves into the intricate mechanisms of the ocean-climate system, explaining how large-scale circulation patterns like the Atlantic Meridional Overturning Circulation (AMOC) and wind-driven gyres redistribute heat and carbon, and how these systems are being altered by warming and freshwater inputs. It also explores the critical roles of air-sea CO2 exchange, the solubility pump, and the biological pump in governing the ocean's capacity to absorb atmospheric carbon. The text further highlights the increasing frequency and intensity of marine heatwaves, storms, and compound coastal extremes, demonstrating how these events are reshaping marine ecosystems, fisheries, and biodiversity, threatening species distributions, and impacting human livelihoods.

Crucially, the book translates global processes into regional and local impacts, focusing on "hotspots" like the Arctic, small island states, and vulnerable coastal cities, where the consequences of ocean change are most acutely felt. It analyzes the complex interplay of sea-level rise, land subsidence, and extreme weather in these areas, outlining various urban adaptation pathways from hard engineering to nature-based solutions and managed retreat. Finally, it explores ocean-based mitigation strategies, including offshore renewable energy, blue carbon ecosystem restoration, and emerging carbon removal technologies, alongside the complex interplay of risk, economics, governance, and financing needed to implement resilient solutions.

The concluding chapters synthesize these elements, presenting plausible future scenarios for 2050 and 2100 that underscore the profound trade-offs inherent in different emissions pathways. It emphasizes that while some level of ocean change is already "locked in" due to past emissions, ambitious mitigation efforts remain the most powerful lever to limit future impacts. The book advocates for integrated action agendas that combine robust scientific observation and modeling with flexible governance, innovative finance, and equitable decision-making, recognizing the ocean's long memory and its pivotal, yet increasingly strained, role in sustaining a habitable planet.