Which is true of climate change in polar regions?
A) Temperatures have changed less in the polar regions than the middle and low latitudes.
B) Increased fresh water run off is increasing thermohaline circulation.
C) Both the temperatures and the rate of temperature rise have risen.
D) Sea ice cover has increased at 9% per decade since 1978.

Question

Quizplus · Accepted Answer

Polar regions have experienced some of the most rapid temperature increases in the world, with average temperature increases of 2-5°C in the last century. Additionally, the Arctic has lost about 40% of its sea ice since the late 1970s. This means that both the temperatures and the rate of temperature rise have risen in polar regions. A is incorrect because temperatures have actually changed more in polar regions than in the middle and low latitudes. B is incorrect because increased fresh water run off is actually decreasing thermohaline circulation. D is incorrect because sea ice cover has been decreasing at a rate of about 13.1% per decade since 1979, according to NASA.

Which Is True of Climate Change in Polar Regions