In the days before last November’s deluge dumped record amounts of rain on the Pacific Northwest coast — 61.5 centimetres on Chilliwack, 54 cm on Abbotsford, 73 cm on Hope and 31.5 cm on Victoria — the news and weather media introduced us to the idea of rivers in the sky, long, narrow flows of moisture-laden air.
“Atmospheric river” is more general. These phenomena don’t just occur in the northeast Pacific, but the general processes and low-latitude ocean origins of the moisture are the same. And although last year’s events brought home to us their potential impacts on people, communities and surrounding environments, the phenomena aren’t new either.
Likewise, heat domes have long histories, even though people usually called them heat waves. The Dust Bowl years of the 1930s were reportedly the result of a sequence of heat domes that stalled over the North American prairies for several years running.
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