Greenland's Melting Ice: Impact on Sea Levels and Climate Change

Polar explorer John Helscher uses depth survey equipment to estimate melt water volume in ice sheet lakes, which affects ice movement and sea level rise. Coastal temperatures have increased, expanding melt areas and accelerating glacier flows. NASA research shows a 30% increase in melt water production over 17 years. Greenpeace's expedition highlights climate change impacts, urging industrialized nations to reduce emissions. If Greenland's ice sheet melts entirely, sea levels could rise by seven meters.

What is the primary reason for estimating the meltwater volume in lakes within the ice sheet?

• To assess its role in accelerating ice sheet movement

• To understand the color variations in the lakes

• To measure the depth of the lakes

• To calculate the ice sheet's total area

What has been observed in coastal weather over the last two decades?

• A decrease in glacier flows

• An increase in temperatures

• A decrease in temperatures

• No significant change in temperatures

According to Dr. Box's research, by what percentage has meltwater production increased in the last 17 years?

• 10%

• 30%

• 40%

• 20%

What role do lakes play in the context of glacier flows?

• They slow down glacier flows

• They have no impact on glacier flows

• They cause glaciers to melt completely

• They accelerate glacier flows

What could be the potential sea level rise if the entire Greenland ice sheet were to disappear?

• Up to 5 meters

• Up to 7 meters

• Up to 10 meters

• Up to 3 meters