THE CONVERSATION COLLABORATION

KNOXVILLE, Tenn. - The tornadoes that ripped through multiple states, killing more than 100 people, were created by a very specific set of climate conditions, according to two Tennessee climatologists.

Kelsey Ellis, an associate professor of geography at the University of Tennessee, explained that December tornadoes are not unusual in the Southeast, and said these types of storms occur when cold, dense air interacts with warm air, creating unstable climate conditions. However, Ellis noted the fact that one of the powerful tornadoes traveled more than 230 miles is, as she put it, an "extreme anomaly."

"The time of year is not, the time of day is not, even though both of those can surprise people, that it's a cool season and that it's overnight," she said, "but the long track of this one is extremely rare, and it requires a very specific set of environmental conditions."

The previous record for a long-track tornado is from 1925, when an F-5 "Tri-State Tornado" traveled 219 miles through Missouri, Illinois and Indiana. Now, the so-called "Quad-State Tornado" is expected to break that record.

In the Department of Geosciences at Middle Tennessee State University, professor Alisa Haas pointed out that because tornadoes can occur any time of day, it's important to have multiple reliable methods for receiving warnings, since power and cellphone service often go down during severe weather. She added that increasing research on these events could help with preparedness.

"We don't know every single thing that goes into the formation of a tornado," she said, "and that can affect whether we have timely warnings or not."

So far, the National Weather Service has reported at least 38 tornadoes occurred simultaneously during the outbreak.

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This story is a collaboration with The Conversation. Read the full article here


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Clean-energy companies and supporters are calling on federal officials to prioritize the development of charging infrastructure for EV powered medium and heavy duty trucks in Pennsylvania and across the nation.

Trucks transported more than 11 billion tons of freight last year, spewing air pollutants and greenhouse gases along the way.

John Boesel, CEO of CALSTART, a clean-transportation nonprofit group, said the EPA's "Phase 3" program would greatly reduce greenhouse gas emissions from all commercial vehicles, improving the health and safety of communities.

"Going forward in the future, we can see a society where we have trucks rolling around with zero-emission and zero-noise and really benefiting communities over the decades that have been hard hit by diesel pollution and emission," Boesel explained.

Pennsylvania has taken a significant step toward electrifying its transportation system with the installation of its first federally funded electric-vehicle charging station in Pittston. Some in the trucking industry have concerns about EV costs, mileage, range, battery safety, charging time and availability.

Boesel emphasized the importance of the Biden administration implementing robust regulations to strengthen the United States' position as a global leader and drive meaningful progress toward the Paris Agreement's objectives. He contends the Inflation Reduction Act provides a lot of incentives for investment in U.S. electric battery technology and production.

"The Inflation Reduction Act will really help spur the growth of the zero-emission commercial vehicle industry. And I think this will end up being a real benefit for the United States from an economic perspective, and from an environmental perspective," Boesel added.

Boesel pointed out the United States is one of 27 nations that have agreed to non-binding targets, which suggests that 30% of all new commercial vehicles sold could be zero emission by 2030.

A new plan takes an interconnected approach to saving Virginia's coastal wetlands.

The aim of Virginia's York River and Small Coastal Basin Roundtable is to conserve tidal wetlands and increase coordination among regional stakeholders. Virginia's wetlands face multiple threats, from rising sea levels due to climate change to invasive species and commercial development. But 99% of the state's coastal land is privately owned.

Andrew Larkin, senior program analyst at the Chesapeake Bay Office for the National Oceanic and Atmospheric Administration, said public-private partnerships are a key component to making the plan work.

"There are funding opportunities, both at the state and federal level, where property owners can seek funds to help construct or maintain living shorelines on their property," Larkin explained. "A living shoreline would be a desire to incorporate natural elements into a shoreline, rather than a traditional sea wall or something along those lines that doesn't provide as many benefits."

As beneficial as partnerships can be, having most coastal wetlands on private land still poses a challenge. He advised people to consider the benefits wetlands provide against climate change. The U.S. Geological Survey said wetlands can capture greenhouse gases and store them for hundreds of thousands of years.

The U.S. Environmental Protection Agency said wetlands cover 5.5% of the 48 contiguous states, with one million wetland acres in Virginia alone.

Pamela Mason, senior research scientist for the Virginia Institute of Marine Science at the College of William and Mary, said the plan will affect stewardship of those wetlands in numerous ways.

"The plan helps frame specific places, like wetlands complexes that exist in the Middle Peninsula, as places to focus some of the research," Mason pointed out. "To build on the wetlands that are already there; maybe do something that some people call pre-restoration; so, planning for wetlands migration."

She stressed if implemented, the plan can create wetland growth. The plan was being developed before the U.S. Supreme Court ruling this spring in Sackett v. EPA, which ended federal protections for most wetlands. But Mason noted some state laws are still in place to protect them.

Support for this reporting was provided by The Pew Charitable Trusts.


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Wildlife corridor conservation is in the spotlight in Congress.

Last week, the Senate Environment and Public Works Subcommittee on Fisheries, Water and Wildlife held a hearing on wildlife corridors, which are important for animal migration in the winter and summer months and can be impeded by fractured landscapes. Sen. Cynthia Lummis, R-Wyo., is a member of the subcommittee.

Madeleine West, director of the Center for Public Lands at the Theodore Roosevelt Conservation Partnership, said protecting wildlife corridors is the top issue for hunting and fishing organizations.

"Abundant wildlife populations of big game species and small game species even, like waterfowl, are important to the TRCP and our partners and the 14 million hunters in this country," West explained.

Corridor conservation has been a bipartisan issue. It was a priority at a recent meeting in Wyoming of the Western Governors' Association. A Department of the Interior Secretarial Order from 2018 under the Trump administration provided financial support for research and on-the-ground work to conserve corridors. The order was expanded under the Biden administration.

West acknowledged the support has been helpful but argued the federal government could make more strategic investments.

"Dedicated and consistent federal funding would be very valuable," West pointed out. "Importantly, it's critical that coordination between federal, state and tribal agencies, as well as private landowners and hunting, fishing and conservation organizations continue and be fostered."

West noted conservation work has not just happened on the federal level. She added there are lots of opportunities to work with private landowners on voluntary conservation projects.

"Some of the best wildlife habitat and corridor habitat is on private land in this country," West stressed. "Because private landowners have done so much proactive, voluntary conservation work on their own to have outstanding habitat quality."