How to use free satellite data to monitor natural disasters and environmental changes

This story was originally published by The Conversation. Qiusheng Wu is assistant professor of geography and sustainability at University of Tennessee.

KNOXVILLE — If you want to track changes in the Amazon rainforest, see the full expanse of a hurricane or figure out where people need help after a disaster, it’s much easier to do with the view from a satellite orbiting a few hundred miles above Earth.

Traditionally, access to satellite data has been limited to researchers and professionals with expertise in remote sensing and image processing. However, the increasing availability of open-access data from government satellites such as Landsat and Sentinel, and free cloud-computing resources such as Amazon Web Services, Google Earth Engine and Microsoft Planetary Computer, have made it possible for just about anyone to gain insight into environmental changes underway.

I work with geospatial big data as a professor. Here’s a quick tour of where you can find satellite images, plus some free, fairly simple tools that anyone can use to create time-lapse animations from satellite images.

KNOXVILLE — Knox County Mayor Glenn Jacobs is observing Women’s History Month throughout March by sharing videos each Wednesday highlighting time spent in different Knox County Schools’ Science, Technology, Engineering, Art and Math (STEAM) classrooms taught by female teachers.

The March 15 video features a visit with South Doyle High School STEM/Computer Science and 2022 KCS Secondary Teacher of the Year Katie DeVinney who was teaching a class on the principles of advanced manufacturing and practical design. 

“I hope out of courses like this, that young women are able to see the opportunities available in sectors of the economy like advanced manufacturing and hopefully pursue those,” Jacobs said in a press release.

DeVinney is a 10-year educator who began her career as a foreign language instructor but was inspired by her husband who started the Robotics program at South Doyle High School, to switch paths. 

“I just love it. It’s so much fun to see the excitement in kids when they get to take something that they designed on this computer and then hold it in the real world. It’s the coolest process I have ever seen so that’s kind of why I do it.” DeVinney said. 

Mayor Jacobs said celebrating women in STEAM is important for young girls because it shows them that women can succeed in technical fields — industry typically driven by men.

The mayor has already shared his visit with Hardin Valley Elementary STEM Educators Jessica Everitt and Jana Yra and his visit with West Valley Middle science teacher Bethany Saunders.

Later this month, he will share visits with Gibbs Middle School Art Teacher Dorothy Verbick and STEM Teacher Lauren Downs; as well as Karns Middle School Math Teacher Rebecca Layton.

— Knox County Mayors Office

Tennessee Citizens for Wilderness Planning Executive Director Sandra Goss is nearing retirement after decades of tending to the environmental issues facing East Tennessee and the Cumberland Plateau.At cusp of retirement, Sandra Goss reflects on what she and others have saved

This is the latest installment of an occasional series, Hellbent, profiling citizens who work to preserve and improve the Southern Appalachian environment.

OAK RIDGE — I can see the view of Lilly Bluff Overlook at Obed Wild and Scenic River in my mind. The trees are bare save some evergreens. The stream I love to splash around in during warmer times is flowing between the slopes. 

I can see the cliff face in the distance. It would be a great place to interview Tennessee Citizens for Wilderness Planning (TCWP) Executive Director Sandra Goss; after all she and her organization helped preserve the area. It’s also near the places she grew up. She cited the experiences as inspiring her conservation ethic.

Earlier this winter, the Christmas tree in Oak Ridge’s Jackson Square was on its side due to icy gusts and I’ve called off meeting with Goss in person at Panera to avoid torturing her or me with the elements. We could hike, but not stand around.

I’ve seen her at TCWP Christmas parties in Oak Ridge and on hikes though, so just like Lilly Bluff, I can imagine her silver-white hair, smile and glasses as I speak to her by phone. I hear her accent, more Southern Appalachian than the Yankee-ish Oak Ridge accent I speak, nodding to her origin in Crossville.

Goss is retiring Aug. 31, and she’s looking back on her work and forward to the break.

Journalists and park officials document damage from the November 2016 wildfires that killed at least 15 people and left hundreds of dwellings and businesses in ruins. Thomas Fraser/Hellbender Press via Knoxville Mercury

How the 2016 Great Smoky Mountains National Park wildfire affected salamanders and other life, six years on

GATLINBURG — The disastrous Chimney Tops 2 wildfire of 2016 occurred some six years ago, but researchers are still looking at its ecological effects.

The Discover Life in America 2023 Colloquium brought together researchers this month from different fields and universities to present findings on research in Great Smoky Mountains National Park. 

Researchers presented on many topics, ranging from trout to the history of the Mingus family in the park.

One such presentation, the first of the day, from William Peterman, associate professor in wildlife ecology and management at Ohio State University, focused on the effects wildfires had on salamander populations, which he described as negative.

Other presenters touched on the wildfire’s effects as well, including its effects on vegetation and its beneficial effects on the diversity of bird species.

“Smoky Mountains is the self-proclaimed salamander capital of the world,” Peterman said. He focused his study on the plethodontid family of salamanders, which breathe through their skin.

“Kind of think of them as a walking lung,” he said.

Smokey Mountain Smelters site is seen in this EPA file photo. Work has commenced on cleaning up this particular Superfund site, but South Knoxville residents are wondering about the fate of the other highly toxic sites along Maryville Pike.

Vestal community leans into future of multiple South Knoxville Superfund sites 

KNOXVILLE — City residents are discussing the future of the Vestal community’s toxic sites after a long history of industrial use and activism that recently led to federally funded action to clean up at least one infamous Superfund site.

Vestal community resident Cathy Scott shared the history of each of these sites near Maryville Pike at South Knox Community Center during two Vestal Community Organization meetings related to the cleanup of multiple Superfund sites on the south side of the city.

She said in an email to Hellbender Press that much of her information came from John Nolt, formerly of the University of Tennessee Philosophy Department and author of the essay “Injustice in the Handling of Nuclear Weapons Waste: The Case of David Witherspoon Inc.,” which is chapter three of the book “Mountains of Injustice: Social and Environmental Justice in Appalachia.”

While the EPA is focusing on the Smokey Mountain Smelter site, Scott, Nolt and others have discussed other properties and their effects on nearby watersheds. The sites are all connected to the Witherspoon family. They are at are at 1508 Maryville Pike; 1630 Maryville Pike and adjacent land; 901 Maryville Pike and 4430 Candoro Ave. The meetings took place Feb. 13 and 22.

“It was a phenomenal accomplishment of community collaboration,” Eric Johnson, president of Vestal Community Organization, said of the two meetings.