Given that the ice cap expands and contracts annually, one can measure how much the ice cap has melted from the annual minimum or the annual average. In this case, you can see a picture of the 2007 annual minimum compared with earlier years. The ice cap has lost about thirty percent of its mass since the mid 1970’s. The ice cap is actually larger right now than it was in 2007. This does not mean that global warming has stopped. Rather, other factors in Earth’s climate may be responsible for a temporary increase in the size of the ice cap.
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