NASA | Estado del hielo marino ártico, Agosto 2013

The video discusses the ongoing decline in Arctic sea ice, comparing current trends to previous years. It explains the impact of Arctic ice melt on global weather patterns, including changes in the jet stream. The video also covers the melting of Greenland's ice and its contribution to sea level rise, contrasting it with Antarctic ice changes. NASA's role in monitoring these changes through satellites and expeditions is highlighted. Finally, resources for further learning about these topics are provided.

What was the comparison made about the Arctic ice loss this year to last year?

• This year has seen more ice loss than last year.

• This year has seen less ice loss than last year.

• This year has seen the same amount of ice loss as last year.

• This year has seen no ice loss at all.

What is the long-term trend observed in Arctic ice cover?

• Fluctuations with no clear trend.

• A steady increase in ice cover.

• No significant change in ice cover.

• A steady decline in ice cover.

How does the Arctic function as a planetary air conditioner?

• By absorbing heat from the sun.

• By reflecting sunlight back into space.

• By cooling warm air from the tropics.

• By generating cold air masses.

What is the main reason for the increase in sea ice around Antarctica?

• Differences in geographical and environmental conditions compared to the Arctic.

• Melting of ice on the continent.

• Global cooling trends.

• Increased snowfall in the region.

What happens when Greenland's thick ice melts?

• It decreases the sea level.

• It increases the sea level.

• It has no effect on the sea level.

• It causes more snowfall.

What technology does NASA use to measure the thickness of ice sheets?

• Satellites with infrared sensors.

• Airplanes with lasers and radars.

• Submarines with sonar equipment.

• Drones with thermal cameras.

What is one of the main purposes of NASA's satellite fleet?

• To explore other planets.

• To study different aspects of Earth, including the ocean and atmosphere.

• To monitor space weather.

• To track global wildlife movements.