Displaying items by tag: heat wave

This story was originally published by The Conversation.  Michael Wysession is Professor of Earth, Environmental and Planetary Sciences, Arts & Sciences at Washington University in St. Louis.

Between the record-breaking global heat and extreme downpours, it’s hard to ignore that something unusual is going on with the weather in 2023.

People have been quick to blame climate change – and they’re right: human-caused global warming plays the biggest role. The weekslong heat wave that started in June 2023 in Texas, the U.S. Southwest and Mexico would have been virtually impossible without it, one study found.

However, the extremes this year are sharper than anthropogenic global warming alone would be expected to cause. September temperatures were far above any previous September, and around 3.1 degrees Fahrenheit (1.75 degrees Celsius) above the preindustrial average, according to the European Union’s earth observation program.

July was Earth’s hottest month on record, also by a large margin, with average global temperatures more than half a degree Fahrenheit (a third of a degree Celsius) above the previous record, set just a few years earlier in 2019.

The Earth’s sun is seen in this NASA image. Scientists said July might be the hottest month in 100,000 years.  

The global heat wave of July 2023 has spared Southern Appalachia. So far.

KNOXVILLE — July 2023 has so far offered a scary look at global climate change around the world, and the month is already one for the record books.

This month will likely end up being the hottest July on record, globally speaking. That comes after quantitative conclusions from multiple scientists that the past week was, globally, the warmest in 100,000 years.

The Southern Appalachians have generally been spared from the heat settling on vast portions of the country and world, but that will soon change. The National Weather Service predicts higher than average temperatures flirting with 100 degrees in the Tennessee Valley next week. Record-breaking temperatures are possible. The average high temperature for July in Knoxville is 87 degrees.

Wild turkeys forage in charred hardwood forest soon after the 2016 Gatlinburg fires, which moved from the Smokies to developed areas in Sevier County. An ORNL model predicts wildfire threats will increase in the Southern Appalachians because of climate change. Thomas Fraser/Hellbender Press via Knoxville Mercury

ORNL report: Local wildfire danger will likely loom larger because of climate change

OAK RIDGE — This cruel summer, the Southern Appalachian region is already baking in above-normal temperatures and basking in poor air quality. 

Air temperatures in Knoxville flirted with 100 degrees on July 6, which were well above average and prompted the National Weather Service to issue a heat advisory for much of the metropolitan area.

It’s hard to definitively link a heat wave to global warming, but one oft-cited consequence of climate change is the growing intensity of wildfires, even in the traditionally moisture-rich Appalachians. The range of climate change effects is difficult to pin down, but one constant in the study of climate change is an expected increase in overall temperatures, which can power wildfires via both fuel increases and volatility.

Thomas Fraser/Hellbender Press

TVA sets record power day for June as region swelters and common sense degrades

This story was originally published by Hard Knox Wire.

KNOXVILLE — City residents this week joined scores of others around the world — from the Southwest United States to the Indian subcontinent — sweltering through late spring with eyes toward a summer that portends to be very hot.

Whether directly attributed to climate change or not, the heat waves are causing untold misery in locations across the Northern Hemisphere, straining power grids to the brink and causing a sharp rise in heat-related illnesses. 

Knoxville Utilities Board asked this week that consumers curtail their electricity use by setting their thermostats a little higher and holding off until night on energy-sucking tasks like doing laundry or running the dishwasher. That request was met in many cases with derision and unsubstantiated claims that charging electric vehicles had overburdened energy infrastructure.

So exactly how hot is it in East Tennessee and how bad is it going to get?