Related topics: climate change

70 percent of US under winter warning as freeze hits

A historic and brutal winter storm put some 240 million Americans under weather warnings Friday as the United States faced holiday travel chaos, with thousands of flights canceled and major highways closed.

Transport of air masses in connection with El Niño decoded

The El Niño phenomenon influences the weather in distant regions, as far away as the U.S., India or the Mediterranean region. But how exactly these so-called teleconnections actually work has not yet been clarified completely.

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