‘We’ve lost control’: what happens when the west Antarctic ice sheet melts?
Oct 24, 2023
15:27
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Podcast explores the melting of ice in Antarctica and its implications for sea level rise. Focuses on the melting of the West Antarctic ice sheet, projected to melt three times faster this century. Discusses the urgency of the climate crisis and the need for action. Honors the life and work of John Vidal, a pioneering journalist. Mentions a climate journalism award and a job platform.
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Quick takeaways
The melting rate of ice caps in West Antarctica is three times faster this century compared to the previous century, indicating that we may have lost control over the West Antarctic ice sheet.
The melting of sea ice shelves in West Antarctica will triple in speed this century, leading to a significant rise in sea levels that poses a threat to coastal cities and billions of people living near coasts.
Deep dives
Melting ice caps and rising sea levels
The podcast episode discusses a new study that focuses on the melting of ice caps in West Antarctica, which could result in a sea level rise of about five meters. The study reveals that the rate of melting in this century will be three times faster than in the previous century. Additionally, the study concludes that our actions to reduce carbon emissions will have minimal impact on the melting of the ice caps, suggesting that we may have lost control over the West Antarctic ice sheet.
Implications of melting ice
The melting of the ice caps in West Antarctica, particularly the sea ice shelves, poses a significant threat. These shelves act as buttresses, preventing the flow of land ice into the ocean. As the sea ice shelves melt, this buttressing effect is lost, resulting in the accelerated flow of land ice and subsequent sea level rise. The study predicts that the melting of these sea ice shelves will triple in speed this century. The potential consequences include a significant rise in sea levels, affecting coastal cities and posing a risk to the billions of people living near coasts.
The urgency of adaptation and the legacy of John Vidal
The study highlights the urgency for adaptation measures rather than solely relying on carbon emissions reductions to mitigate the impact. Such measures include building flood defenses and considering the relocation of coastal populations. The episode also pays tribute to the late John Vidal, a pioneering environmental journalist who highlighted the link between environmental problems and issues of poverty and social injustice. Vidal's work and passion for raising awareness about the environment set an example for subsequent generations of journalists.
Madeleine Finlay hears from environment editor Damian Carrington about a new study by the British Antarctic Survey, which shows Antarctic ice may be melting even faster than we thought. He also reflects on the life and career of former environment editor John Vidal, whose death was announced last week. Help support our independent journalism at theguardian.com/sciencepod
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