TED: What's hidden under the Greenland ice sheet? | Kristin Poinar

The video explores the fascinating world of glaciology, focusing on the Greenland ice sheet. It discusses the use of radar and satellites to uncover hidden features and dynamics of the ice sheet, including the discovery of a glacier aquifer. The video highlights the importance of numeric models in predicting future sea level rise and the role of glaciologists in understanding these changes. The potential impact of the aquifer on ice flow and sea level rise is also examined.

What is the significance of satellite observations in the study of the Greenland ice sheet?

• They provide real-time weather updates.

• They help in predicting volcanic eruptions.

• They reveal hidden facts about the ice sheets.

• They are used for tracking migratory birds.

What was a surprising discovery about the Greenland ice sheet?

• It has no impact on sea levels.

• It is smaller than Antarctica.

• It contains liquid water within.

• It is entirely static.

How does radar help in studying the Greenland ice sheet?

• By detecting wildlife.

• By melting the ice.

• By revealing the bedrock beneath the ice.

• By measuring air temperature.

What role do crevasses play in the movement of water within the ice sheet?

• They prevent water from reaching the ocean.

• They are used for human transportation.

• They act as barriers to ice flow.

• They provide pathways for water to reach the ocean.

What is the purpose of numeric models in glaciology?

• To predict weather patterns.

• To describe ice cracking and dynamics.

• To measure ice thickness.

• To track animal movements.

What is the potential impact of the Greenland ice sheet on global sea levels?

• It has no impact.

• It will stabilize sea levels.

• It could cause a significant rise in sea levels.

• It will decrease sea levels.

Why is it important to predict future sea level rise accurately?

• To help communities prepare for changes.

• To enhance tourism.

• To improve fishing techniques.

• To plan for agricultural expansion.