Arctic sea ice thins in 2 big jumps, and now more vulnerable

Study: Arctic sea ice thins in 2 big jumps, now more vulnerable

Arctic sea ice is in trouble. A new study says its thickness dropped sharply in two sudden events about 15 years ago.

Study: Arctic sea ice thins in 2 big jumps, now more vulnerable

Arctic sea ice is in trouble. A new study says its thickness dropped sharply in two sudden events about 15 years ago.

Study: Arctic sea ice thins in 2 big jumps, now more vulnerable

Arctic sea ice is in trouble. A new study says its thickness dropped sharply in two sudden events about 15 years ago.

Study: Arctic sea ice thins in 2 big jumps, now more vulnerable

Arctic sea ice is in trouble. A new study says its thickness dropped sharply in two sudden events about 15 years ago.

Study: Arctic sea ice thins in 2 big jumps, now more vulnerable

Arctic sea ice is in trouble. A new study says its thickness dropped sharply in two sudden events about 15 years ago.

Study: Arctic sea ice thins in 2 big jumps, now more vulnerable

Arctic sea ice is in trouble. A new study says its thickness dropped sharply in two sudden events about 15 years ago.