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306 | Helen Czerski on Our Energetic Oceans

Feb 24, 2025

Helen Czerski, an ocean physicist and Associate Professor at UCL, dives into the complexities of our oceans. She dispels the myth that we understand them less than the moon, highlighting their intricate ecosystems and unique interspecies relationships. Czerski discusses the challenges of traditional physics in studying ocean dynamics, stressing the role of temperature and salinity in creating distinct layers. She underscores the impact of human activities on these vital systems and calls for advancements in ocean science to ensure a sustainable future.

01:12:19

Episode guests

Helen Czerski

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Episode notes

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Quick takeaways

The Earth's oceans are complex systems with many interacting components, highlighting the need for interdisciplinary approaches to understand their dynamics.

Oceans play a critical role in regulating climate by absorbing 90% of excess heat from climate change, affecting global ecosystems.

Human activities like overfishing and pollution severely impact ocean health, necessitating community engagement for effective conservation efforts.

Deep dives

Understanding Complexity

Complex systems contain many interacting components that contribute to the overall behavior of the system. Unlike complicated systems, where the parts can often be analyzed in isolation, complex systems require an understanding of how those parts interact to form a cohesive whole. This concept is important when considering both human behaviors in economies and individual contributions in societal systems. The Earth's oceans represent a prime example of such a complex system, where myriad factors interact with climate and biosphere, emphasizing the significance of interdisciplinary study.

Intro

5min

Debunking Myths about Ocean Knowledge

3min

Exploring Ocean Dynamics and Ecosystems

8min

Navigating the Complexity of Ocean Dynamics

4min

The Complexities of Ocean Dynamics

23min

The Human Connection to Ocean Exploration

5min

Ocean Dynamics and Human Impact

24min

Prioritizing Ocean Science for a Vibrant Future

2min

It is commonplace to refer to the Earth's oceans as vast and largely unexplored. But we do understand some aspects, and improving that understanding is crucial to ensuring the continued viability and success of life on this planet. The oceans are a paradigmatic complex system: there are many components, distinct but mutually interacting, that add up to a nuanced whole. We talk with ocean physicist Helen Czerski about what the ocean is and how it's changing.

Blog post with transcript: https://www.preposterousuniverse.com/podcast/2025/02/24/306-helen-czerski-on-our-energetic-oceans/

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Helen Czerski received her Ph.D. in physics from the University of Cambridge. She is currently an Associate Professor at the Department of Mechanical Engineering at University College London. She is the author of several books, most recently The Blue Machine: How the Ocean Works. She is a frequent television presenter for the BBC and elsewhere.

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