NASA | Sea Ice Max 2013: An Interesting Year for Arctic Sea Ice

The Arctic Ocean's ice has reached its maximum extent, marking the 5th smallest winter peak in 35 years. Seasonal changes show a trend of decreasing ice, with the lowest extent recorded in 2012. Factors like warm temperatures and cyclones contribute to ice melt, while thinner ice leads to fracturing events. Despite this year's smaller maximum, it doesn't guarantee a record low in summer, but the thinning ice cap increases vulnerability to future melting, potentially leading to ice-free Arctic summers in a few decades.

What is the significance of the Arctic Ocean's maximum ice extent being the fifth smallest in 35 years?

• It means the ice extent is at its historical maximum.

• It shows a decrease in winter ice expansion.

• It suggests a stable ice extent over the years.

• It indicates a trend of increasing ice coverage.

What factors contributed to the record low Arctic sea ice extent in 2012?

• Increased snowfall and colder temperatures.

• Thinning ice caps, warm temperatures, and a strong Arctic cyclone.

• Decreased ocean currents and winds.

• A lack of satellite measurements.

How did the strong Arctic cyclone in August 2012 affect the sea ice?

• It caused the ice to freeze more rapidly.

• It helped break up the ice north of the Bering Strait.

• It caused the ice to thicken.

• It had no impact on the sea ice.

What is a common cause of ice fracturing in the Arctic?

• Increased snowfall.

• Human activities on the ice.

• Ocean currents and winds.

• Volcanic activity under the ice.

What is the potential future scenario for the Arctic Ocean due to thinning ice?

• Permanent ice coverage throughout the year.

• Virtually ice-free summers in a few decades.

• No change in ice extent.

• Increased ice thickness in winter.