In this episode of The SAGES Climate Science Podcast, we take a closer look at one of the most vital yet underappreciated players in the climate system: the ocean. Joining us are Dr. Philippa Rickard, an environmental scientist specialising in oceanic microscale processes, and Prof. Bill Austin, a marine geoscientist at the University of St Andrews and the Scottish Association for Marine Science, and Chair of the Scottish Blue Carbon Forum. Together, they unravel the complex relationship between the ocean and climate change. We begin by exploring the ocean’s role in regulating Earth’s climate and how Scotland has historically contributed to ocean science. Dr. Rickard dives into the carbon cycle, explaining how oceanic interactions help regulate atmospheric carbon and, ultimately, our climate. We also tackle the surprising fact that our oceans are essential for life, particularly when it comes to the oxygen we breathe. From there, we delve into blue carbon - carbon stored in coastal and marine ecosystems - and discuss the progress of blue carbon research. Prof. Austin sheds light on the UN’s Blue Carbon Programme and how Scotland is playing a leading role in global ocean conservation. How much capacity does the ocean have to continue absorbing greenhouse gases, and are we on the right path to protecting it? Lastly, the episode discusses whether our ocean protection efforts are more technology-focused or nature-based and how everyday individuals can contribute to safeguarding our seas. Join us as we uncover the hidden potential of our oceans in combating climate change and how Scotland’s blue carbon efforts are helping to secure a sustainable future.