Levke Caesar: "Oceanic Slowdown: Decoding the AMOC"
The Great Simplification with Nate Hagens
Nate Hagens
4.8 • 552 Ratings
🗓️ 22 May 2024
⏱️ 90 minutes
🧾️ Download transcript
Summary
(Conversation recorded on April 23rd, 2024)
Show Summary:
On this episode, Nate is joined by climate physicist Levke Caesar for a comprehensive overview of the Atlantic Meridional Overturning Circulation (AMOC) and its connections to broader planetary systems. Amid a complex and heavily interconnected climate system, the AMOC is a powerful force for regulating temperature between the Northern and Southern Hemispheres along the Atlantic Ocean - yet it's estimated to have slowed down by about 15% over the last few decades. What are the possible domino effects of this slowing oceanic powerhouse at a regional and global scale? How well do we understand what drives the AMOC, its cyclical patterns, and connections with other currents? More importantly, how does the AMOC interact with other biospheric mechanisms that have shaped our stable, life-supporting planetary home?
About Levke Caesar:
Levke Caesar is a climate physicist at the Potsdam Institute for Climate Impact Research, mainly known for her studies on the Atlantic Meridional Overturning Circulation (AMOC) and its pivotal role in the climate system. Her research primarily focuses on the past, present, and future evolution of the AMOC and its intricate interactions within the North Atlantic region. Caesar's seminal work on the historical evolution of the AMOC has been featured in prestigious journals such as Nature and Nature Geoscience, garnering hundreds of citations. Since October 2023, she has assumed the role of scientific lead for the newly launched Planetary Boundary Science Initiative (PBScience) at PIK.
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00:00 - Intro
1:59 - Levke's Background
4:29 - What is the AMOC?
10:45 - AMOC Risks
15:25 - Ocean Salinity
20:47 - Three Potential Scenarios
31:11 - Canfield Ocean
36:46 - Effects in Europe and Globally
45:31 - Public Awareness
49:02 - Measuring AMOC
52:40 - The Gulf Stream
56:24 - AMOC Feedbacks
1:00:18 - Scientific Consensus
1:04:53 - Levke's Work
1:10:02 - Interventions and Suggestions
1:16:52 - How to Live a Normal Life
1:21:38 - Personal Advice
1:26:35 - What Would You Do with a Magic Wand?
1:27:36 - Closing Thoughts
Transcript
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| 0:00.0 | You're listening to the Great Simplification. |
| 0:04.6 | I'm Nate Hagen's. |
| 0:06.2 | On this show, we describe how energy, the economy, the environment, and human behavior all fit together and what it might mean for our future. |
| 0:15.2 | By sharing insights from global thinkers, we hope to inform and inspire more humans to play emergent roles in the |
| 0:22.7 | coming great simplification. Today's conversation is with climate physicist Levka Caesar. |
| 0:33.0 | Levka works at the Potsdam Institute for Climate Impact Research in Potsdam, Germany. |
| 0:39.3 | Her current work primarily focuses on the Atlantic meridional overturning circulation, |
| 0:45.4 | aka the AMAC, and its pivotal role in our climate system. |
| 0:50.5 | Lefka's research has produced seminal work on the past evolution of this important |
| 0:56.3 | ocean current. In October of 2003, she also assumed the role of scientific lead for the newly |
| 1:03.8 | launched planetary boundary science initiative at the Pottsdam Institute. This conversation was a deep dive on all things AMAC, what we know, what we don't know, |
| 1:16.0 | and what speculations are for the future of this critical component of our planetary systems. |
| 1:21.9 | Please welcome Levka Caesar. |
| 1:30.7 | Levka Caesar. Levka, great to see you. |
| 1:34.5 | Yeah, great to talk to you, Nate. |
| 1:36.7 | Thanks for inviting me. |
| 1:37.8 | You are welcome. |
| 1:38.7 | So usually when I host guests, I have their location on my globe. |
| 1:45.5 | But since we're going to be talking about the AMOC, |
| 1:48.6 | the Atlantic meridian overturning circulation of the Atlantic Ocean, |
| 1:52.9 | I highlighted the Atlantic Ocean as the theme location of the podcast. |
| 1:59.3 | So you are a world-renowned expert on ocean issues, especially the AMOC, and that's |
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