How hot could our planet get The Climate Question podcast BBC World Service

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We know the planet is getting hotter because of emissions from greenhouse gases such as Carbon Dioxide. But just how hot could it get?

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In this edition of The Climate Question, Graihagh Jackson and Jordan Dunbar chat to NASA scientist, Kate Marvel, about the world of climate modelling.

Kate has spent decades trying to work out what will happen to our planet as emissions of carbon dioxide increase.

Although the basic facts of climate change are clear, modellers like her are trying to understand how photosynthesis by plants will change in a warmer world. And they’re also puzzling over the crucial role played by clouds!

Recently, Kate has written Human Nature, a book about how climate change affects our emotions.

She tells Jordan and Graihagh about the mix of feelings people get when they think about global warming – from fear and grief to pride and hope!

00:00 Introduction
01:35 What are climate models and how do they work?
03:55 Carbon cycle feedbacks and why modelling the global temperature is difficult
05:10 Photosynthesis in a warmer world
06:45 A perfect climate model is impossible
08:22 The role of clouds in our climate
10:15 Human behaviour is the biggest unknown
13:15 The basic facts about climate change are beyond doubt
14:55 Climate scientists also feel emotions
18:20 Kate’s grief at the loss of California’s sequoia trees
19:55 The nine emotions we all feel about climate change
21:40 Climate solutions are a cause for hope
23:35 The solar power revolution