In a warming Pacific Northwest, summers are getting hotter and winters less cold, but the atmospheric patterns that influence the weather aren't necessarily expected to become stronger or more frequent by the end of the century, according to a new Portland State University study.
, models suggest we'll have the same variety of atmospheric patterns as we have now but the weather we experience from them will be warmer and, in some cases, wetter. Graham Taylor, a Ph.D. student in PSU's Earth, Environment and Society program, and Paul Loikith, associate professor of geography at PSU, applied a novel machine-learning approach to assess to what degree the range of weather patterns over the Pacific Northwest will change under a high-end scenario of future warming using a suite of state-of-the-artThe study's aim was to look at whether a warming climate would make certain types of weather patterns—movements of air that on a large scale can influence whether it's hotter than average, colder than average, dry or wet—become more or less frequent or stronger or weaker.
"We get a certain number of patterns that bring us rain, patterns that bring us heat waves and patterns that are average," Taylor said."The range and strength of those patterns isn't projected to necessarily change, but they will be within a much warmer climate." For example, the study does not show that heat domes—which became part of the public's vocabulary after the deadly weather event in June 2021—will become more common or stronger, only that they will be hotter when they do occur.
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