By Mark Richardson, Keystone State News Connection
Across Pennsylvania and other northern U.S. states, climate change — from burning oil, coal, and methane gas — is increasing the number of winter days with minimum temperatures above freezing.
The phenomenon is known as “lost winter” and a Climate Shift Index analysis of temperatures showed more than 60% of 28 snow belt states are having at least one additional week of days above freezing.
Shel Winkely, a meteorologist and weather and climate engagement specialist for Climate Central, said winter weather will not be as cold for as long as it used to be.
“Temperatures that are below freezing — so, 32 degrees Fahrenheit, or zero degrees Celsius — those are important days,” Winkely explained. “We found out how many days climate change has taken away overnight lows that are at or below the freezing temperature.”
Winkley pointed out that when you look at the 30-year average of snowfall for Pennsylvania, cities like Philadelphia now have only a 9% chance of seeing a white Christmas, with Pittsburgh faring a bit better at about 31%.
Winkley emphasized the loss of cold winter days can negatively affect some regions that depend economically on winter sports for recreation and tourism income. He added that lost winter days can also contribute to a smaller snowpack, meaning less spring-melt water is available for municipal systems or agricultural operations.
“On the whole, the state, when you take the average over this decade — again, 2014 to 2023 — climate change added about 10 days per year above 32 degrees or so above freezing,” Winkley reported.
Winkley noted the report does not mean winters are going away but the warming climate is making winters shorter and less intense.
“This doesn’t mean that there’s not cold, or that we’re losing all of the cold,” Winkley stressed. “We still have cold that is to be found. It just means that we’re losing those classic winters. This isn’t the winters that our parents experienced or that our grandparents experienced.”
The post ‘Lost’ Winter Days: A Side Effect of Climate Change in PA appeared first on BCTV.
Source: bctv
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