Sea sends early warning of heatwaves
Feeling the heat as New York City swelters in extreme summer temperatures. Image: Bill via Flickr
LONDON, 8 April, 2016 – Americans could have as many as seven weeks’ advance notice of devastating heatwaves. A telltale pattern of sea surface temperatures in the Pacific Ocean could presage weeks of intolerable temperatures in the cities and plains of the US.
Research published in Nature Geoscience reveals that a “fingerprint” of sea surface temperatures about 20 degrees north of the Equator – and dubbed the Pacific Extreme Pattern – meant that the chances of sustained and extreme heat 50 days later in the US Midwest and East Coast stepped up from one in six to one in four. And 30 days ahead, the same pattern brought the odds to better than one in two.
Critical aspects
“Summertime heatwaves are among the deadliest weather events, and they can have big impacts on farming, energy use, and other critical aspects of society,” says Karen McKinnon, a post-doctoral fellow at the National Centre for Atmospheric Research in Boulder, Colorado.
“If we can give city planners and farmers a heads up that extreme heat is on the way, we might be able to avoid some of the worst consequences.”
Climate scientists have consistently predicted that climate change will be driven by global warming that will manifest itself in ever more intense, and more frequent, extremes of heat.
In 2012, the US was hit by an unprecedented and sustained heatwave that broke thousands of local temperature records, and claimed an estimated 100 lives.
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