For thousands of years, the Arctic has quietly stored an enormous reserve of carbon beneath its frozen ground. But as the region warms, that long-locked vault is beginning to open.

In this episode of The Climate Translation, Dr. Mac explores the science of permafrost, which is permanently frozen soil that contains nearly twice as much carbon as currently exists in the atmosphere. He explains how this carbon accumulated over thousands of years, what happens chemically when frozen soils thaw, and why the gases released can include both carbon dioxide and methane.

We examine how thawing ground is already reshaping Arctic landscapes and infrastructure, while also introducing one of climate science’s most important concepts: feedback loops. Permafrost thaw doesn’t trigger sudden collapse, but it can amplify warming over time, tightening the margins scientists use to estimate future climate change.

CC0 Music from Charles Korpics - I want to Live! (Again)

Climate systems rarely operate in isolation. What happens in one part of the planet can quietly push another system closer to change.

In this episode of The Climate Translation, Dr. Mac explores the growing concern among scientists that several major Earth systems may be more tightly connected than we once understood. Beginning with melting in Greenland, he explains how freshwater entering the North Atlantic can influence ocean circulation, alter tropical rainfall patterns that affect the Amazon rainforest, and contribute to changes in heat distribution that reach all the way to Antarctica’s vulnerable ice shelves.

We break down what scientists actually mean when they talk about “tipping points.” Rather than sudden collapse, these thresholds describe shifts in stability, where gradual change can begin to accelerate once certain limits are crossed. Understanding these connections helps explain why the speed of climate change matters as much as the total amount of warming itself.

CC0 Music from Charles Korpics - I want to Live! (Again)

Climate change isn’t driven by gases alone. Tiny particles in the air quietly shape how much energy reaches the planet.

In this episode of The Climate Translation, Dr. Mac explores aerosols: microscopic particles that can cool or warm the Earth by reflecting sunlight or absorbing heat. From volcanic eruptions that temporarily dim the planet, to soot that accelerates ice melt, to aircraft contrails that subtly trap heat, these “invisible mirrors” play an outsized role in the climate system.

This episode explains how aerosols differ from greenhouse gases, why their effects are short-lived but powerful, and why cleaning up air pollution can briefly reveal warming that was already there. Understanding aerosols helps clarify year-to-year climate variability, and why long-term warming is still driven by greenhouse gases.

CC0 Music from Charles Korpics - I want to Live! (Again)