(Centre Daily Times) -- Record cold! Ships trapped in Antarctic ice! Even so, we can say with high confidence that the globe is warming because of carbon dioxide from our fossil fuel burning.
While we are writing this, if you head toward the North Pole from the center of this huge blob of cold air, the temperature rises.
An unusual circulation pattern has shifted very cold air down toward Pennsylvania. But the Northern Hemisphere remains most of a degree Fahrenheit above the late-20th-century average, with great warmth in many places including north of Norway.
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