Which of the following is correct regarding Arctic sea ice?
A) Until recently, seasonal variations in sea ice extent were rare.
B) Summer sea ice reached its minimum extent in 2001 and has gradually increased since then.
C) Since 1979, summer sea ice minimum extent and winter sea ice maximum extent have declined.
D) In the summer, most to all sea ice melts, only to refreeze in the winter. However, less water has been refreezing over the past decade.

Question

Quizplus · Accepted Answer

According to the information given, since 1979, both summer sea ice minimum extent and winter sea ice maximum extent have declined. This is the only option that accurately reflects this information. A is incorrect because seasonal variations in sea ice extent have been occurring for a long time. B is incorrect because it is stated that summer sea ice minimum extent has been declining since 1979, and has not reached its minimum extent in 2001. D is incorrect because it is stated that less ice is refreezing in the winter, not that most to all ice is melting in the summer.

Which of the Following Is Correct Regarding Arctic Sea Ice