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NASA is mapping duststorms from space with this new high-tech device

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In the Mediterranean, it’s called “Sirocco,” and in the Canary Islands, “La Calima,” while it goes by “Harmattan” in West Africa, and “Haboob” in Sudan. But these varied names all describe the same thing: dust storms.

Sand and dust storms are a global phenomenon. These fine dust particles can be carried by winds across thousands of miles, impacting health and livelihoods.

According to the UN, dust storms have dramatically increased in recent years due to climate change, land degradation and drought.

Climate scientist Natalie Mahowald hopes that by learning more about dust storms, we can plan for the future. An engineering professor at Cornell University in the US, she’s spent the last two decades tracking dust across the globe – and now, is working with NASA on a new instrument called EMIT.

The first-of-its-kind, space-borne imaging spectrometer is helping to map dust colors. Scientists can use the data in their climate models to work out how different minerals heat or cool the planet, explains Mahowald. Each type of dust has its own unique light-reflecting signature: for example, white dust reflects solar radiation, or heat, while “red and the dark dust absorbs it,” she says.

EMIT (the Earth Surface Mineral Dust Source Investigation) will “revolutionize what we can do,” says Mahowald. “We can use that (data) to better understand what the impact of desert dust is.”

A mineral map

Launched in July 2022, EMIT is attached to the International Space Station and orbits the Earth 16 times a day, mapping the mineral composition of the planet’s surface by gathering data on spectra, the different light wavelengths that are emitted by different colors.

This information allows researchers to determine the mineral and chemical composition of substances on the surface. Scanning 50-mile-wide strips in a matter of seconds, the gadget will provide scientists with billions of data points to use in climate model predictions – greatly expanding the current data set which comes from just 5,000 sampling sites, says Mahowald.

Most of the existing data comes from agricultural land, where detailed soil information was valuable for farming and commercial purposes. The wealth of information provided by EMIT, which includes data from the world’s most arid regions, will help scientists learn much more about dust and its impact on climate – an issue which Mahowald says has been largely overlooked until now.

A vicious cycle

The UN estimates that 2,000 million tons of sand and dust are emitted into the atmosphere annually.

Sand and dust storms are vital for the planet, carrying nutritious soils across countries and continents and helping plant life to flourish – for example, dust from the Sahara Desert feeds trees in the Amazon rainforest, where the soil lacks the necessary nutrients.

“Ecosystems actually rely on dust aerosols,” says Diana Francis, a climate scientist at Khalifa University in Abu Dhabi.

But if dust storms become more frequent and intense, they could accelerate global warming: a report from the UN highlights how changing storm patterns could alter the distribution of Earth’s minerals and reduce rainfall, while dust aerosols can act like greenhouse gases in the atmosphere by absorbing solar radiation.

 

The Empty Quarter, UAE, Oct-Nov 2022
Tracking dust storms across the world’s largest sand desert
 

This could create a feedback loop, in which climate change causes more extreme dust storms through land degradation and drought, and dust storms exacerbate climate change. There’s evidence this is already happening, says Francis, pointing to “Godzilla,” the biggest dust storm worldwide in 20 years, which crossed the Atlantic in June 2020, darkening skies from the Caribbean to the US state of Texas.

Dust storms can cause respiratory illnesses, damage livestock and crops, and disrupt transport. In the Middle East and North Africa region, they are estimated to cost the economy $13 billion a year.

And the number and severity of storms in the Sahara Desert is on the rise, says Francis. In some of her earlier research, she found that dust from the Sahara had reached the Arctic, due to changes in atmospheric circulation.

“We noticed that during the last two decades, the darkening of the ice in the Arctic was becoming significant,” says Francis, highlighting another feedback loop. “We know that when the ice is dark it’ll reflect less of the solar light, and therefore it’ll melt faster.”

More than just dust

EMIT has delivered 5,000 data sets so far – each containing over 1.4 million spectra. Scientists at NASA are using the data to help map dust and soil composition across the globe.

But EMIT’s data is also being used to map another factor affecting climate change: methane.

Although it makes up just a fraction of greenhouse gas emissions, methane is estimated to have 80 times more warming power than carbon dioxide over the first 20 years after it enters the atmosphere.

Engineers at NASA's Jet Propulsion Laboratory in California assemble components of the EMIT device in December 2021.

Methane absorbs infrared light in a unique pattern, providing a “spectral fingerprint” that EMIT’s imaging spectrometer can pinpoint precisely. While NASA knew that EMIT’s imaging technology would be able to spot greenhouse gas emissions, it’s performing “better than expected,” says Robert Green, senior research scientist at NASA’s Jet Propulsion Laboratory and the principal investigator on the EMIT mission.

So far, EMIT has spotted 50 “super-emitters” across the world, mostly coming from fossil fuel, waste and agricultural facilities, in locations including the US, Iran and Turkmenistan.

While carbon dioxide lingers in the atmosphere for centuries, methane dissipates after a decade, which means that reducing methane emissions is a fast route to slowing climate change. NASA hopes that this information will encourage countries to stem their methane emissions.

While EMIT’s mission was initially scheduled to last just 12 months, Green says that there are now plans to extend the project.

Mahowald is excited for the future. “The EMIT project is testing the waters, and really showing what is possible,” she says. “We’re going to go from 5,000 to billions of pieces of data, and much higher resolution. That’s going to help us tremendously.”

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Here’s how Helene and other storms dumped a whopping 40 trillion gallons of rain on the South

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More than 40 trillion gallons of rain drenched the Southeast United States in the last week from Hurricane Helene and a run-of-the-mill rainstorm that sloshed in ahead of it — an unheard of amount of water that has stunned experts.

That’s enough to fill the Dallas Cowboys’ stadium 51,000 times, or Lake Tahoe just once. If it was concentrated just on the state of North Carolina that much water would be 3.5 feet deep (more than 1 meter). It’s enough to fill more than 60 million Olympic-size swimming pools.

“That’s an astronomical amount of precipitation,” said Ed Clark, head of the National Oceanic and Atmospheric Administration’s National Water Center in Tuscaloosa, Alabama. “I have not seen something in my 25 years of working at the weather service that is this geographically large of an extent and the sheer volume of water that fell from the sky.”

The flood damage from the rain is apocalyptic, meteorologists said. More than 100 people are dead, according to officials.

Private meteorologist Ryan Maue, a former NOAA chief scientist, calculated the amount of rain, using precipitation measurements made in 2.5-mile-by-2.5 mile grids as measured by satellites and ground observations. He came up with 40 trillion gallons through Sunday for the eastern United States, with 20 trillion gallons of that hitting just Georgia, Tennessee, the Carolinas and Florida from Hurricane Helene.

Clark did the calculations independently and said the 40 trillion gallon figure (151 trillion liters) is about right and, if anything, conservative. Maue said maybe 1 to 2 trillion more gallons of rain had fallen, much if it in Virginia, since his calculations.

Clark, who spends much of his work on issues of shrinking western water supplies, said to put the amount of rain in perspective, it’s more than twice the combined amount of water stored by two key Colorado River basin reservoirs: Lake Powell and Lake Mead.

Several meteorologists said this was a combination of two, maybe three storm systems. Before Helene struck, rain had fallen heavily for days because a low pressure system had “cut off” from the jet stream — which moves weather systems along west to east — and stalled over the Southeast. That funneled plenty of warm water from the Gulf of Mexico. And a storm that fell just short of named status parked along North Carolina’s Atlantic coast, dumping as much as 20 inches of rain, said North Carolina state climatologist Kathie Dello.

Then add Helene, one of the largest storms in the last couple decades and one that held plenty of rain because it was young and moved fast before it hit the Appalachians, said University of Albany hurricane expert Kristen Corbosiero.

“It was not just a perfect storm, but it was a combination of multiple storms that that led to the enormous amount of rain,” Maue said. “That collected at high elevation, we’re talking 3,000 to 6000 feet. And when you drop trillions of gallons on a mountain, that has to go down.”

The fact that these storms hit the mountains made everything worse, and not just because of runoff. The interaction between the mountains and the storm systems wrings more moisture out of the air, Clark, Maue and Corbosiero said.

North Carolina weather officials said their top measurement total was 31.33 inches in the tiny town of Busick. Mount Mitchell also got more than 2 feet of rainfall.

Before 2017’s Hurricane Harvey, “I said to our colleagues, you know, I never thought in my career that we would measure rainfall in feet,” Clark said. “And after Harvey, Florence, the more isolated events in eastern Kentucky, portions of South Dakota. We’re seeing events year in and year out where we are measuring rainfall in feet.”

Storms are getting wetter as the climate change s, said Corbosiero and Dello. A basic law of physics says the air holds nearly 4% more moisture for every degree Fahrenheit warmer (7% for every degree Celsius) and the world has warmed more than 2 degrees (1.2 degrees Celsius) since pre-industrial times.

Corbosiero said meteorologists are vigorously debating how much of Helene is due to worsening climate change and how much is random.

For Dello, the “fingerprints of climate change” were clear.

“We’ve seen tropical storm impacts in western North Carolina. But these storms are wetter and these storms are warmer. And there would have been a time when a tropical storm would have been heading toward North Carolina and would have caused some rain and some damage, but not apocalyptic destruction. ”

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Follow AP’s climate coverage at https://apnews.com/hub/climate

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Follow Seth Borenstein on Twitter at @borenbears

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Associated Press climate and environmental coverage receives support from several private foundations. See more about AP’s climate initiative here. The AP is solely responsible for all content.

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‘Big Sam’: Paleontologists unearth giant skull of Pachyrhinosaurus in Alberta

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It’s a dinosaur that roamed Alberta’s badlands more than 70 million years ago, sporting a big, bumpy, bony head the size of a baby elephant.

On Wednesday, paleontologists near Grande Prairie pulled its 272-kilogram skull from the ground.

They call it “Big Sam.”

The adult Pachyrhinosaurus is the second plant-eating dinosaur to be unearthed from a dense bonebed belonging to a herd that died together on the edge of a valley that now sits 450 kilometres northwest of Edmonton.

It didn’t die alone.

“We have hundreds of juvenile bones in the bonebed, so we know that there are many babies and some adults among all of the big adults,” Emily Bamforth, a paleontologist with the nearby Philip J. Currie Dinosaur Museum, said in an interview on the way to the dig site.

She described the horned Pachyrhinosaurus as “the smaller, older cousin of the triceratops.”

“This species of dinosaur is endemic to the Grand Prairie area, so it’s found here and nowhere else in the world. They are … kind of about the size of an Indian elephant and a rhino,” she added.

The head alone, she said, is about the size of a baby elephant.

The discovery was a long time coming.

The bonebed was first discovered by a high school teacher out for a walk about 50 years ago. It took the teacher a decade to get anyone from southern Alberta to come to take a look.

“At the time, sort of in the ’70s and ’80s, paleontology in northern Alberta was virtually unknown,” said Bamforth.

When paleontogists eventually got to the site, Bamforth said, they learned “it’s actually one of the densest dinosaur bonebeds in North America.”

“It contains about 100 to 300 bones per square metre,” she said.

Paleontologists have been at the site sporadically ever since, combing through bones belonging to turtles, dinosaurs and lizards. Sixteen years ago, they discovered a large skull of an approximately 30-year-old Pachyrhinosaurus, which is now at the museum.

About a year ago, they found the second adult: Big Sam.

Bamforth said both dinosaurs are believed to have been the elders in the herd.

“Their distinguishing feature is that, instead of having a horn on their nose like a triceratops, they had this big, bony bump called a boss. And they have big, bony bumps over their eyes as well,” she said.

“It makes them look a little strange. It’s the one dinosaur that if you find it, it’s the only possible thing it can be.”

The genders of the two adults are unknown.

Bamforth said the extraction was difficult because Big Sam was intertwined in a cluster of about 300 other bones.

The skull was found upside down, “as if the animal was lying on its back,” but was well preserved, she said.

She said the excavation process involved putting plaster on the skull and wooden planks around if for stability. From there, it was lifted out — very carefully — with a crane, and was to be shipped on a trolley to the museum for study.

“I have extracted skulls in the past. This is probably the biggest one I’ve ever done though,” said Bamforth.

“It’s pretty exciting.”

This report by The Canadian Press was first published Sept. 25, 2024.

The Canadian Press. All rights reserved.

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The ancient jar smashed by a 4-year-old is back on display at an Israeli museum after repair

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TEL AVIV, Israel (AP) — A rare Bronze-Era jar accidentally smashed by a 4-year-old visiting a museum was back on display Wednesday after restoration experts were able to carefully piece the artifact back together.

Last month, a family from northern Israel was visiting the museum when their youngest son tipped over the jar, which smashed into pieces.

Alex Geller, the boy’s father, said his son — the youngest of three — is exceptionally curious, and that the moment he heard the crash, “please let that not be my child” was the first thought that raced through his head.

The jar has been on display at the Hecht Museum in Haifa for 35 years. It was one of the only containers of its size and from that period still complete when it was discovered.

The Bronze Age jar is one of many artifacts exhibited out in the open, part of the Hecht Museum’s vision of letting visitors explore history without glass barriers, said Inbal Rivlin, the director of the museum, which is associated with Haifa University in northern Israel.

It was likely used to hold wine or oil, and dates back to between 2200 and 1500 B.C.

Rivlin and the museum decided to turn the moment, which captured international attention, into a teaching moment, inviting the Geller family back for a special visit and hands-on activity to illustrate the restoration process.

Rivlin added that the incident provided a welcome distraction from the ongoing war in Gaza. “Well, he’s just a kid. So I think that somehow it touches the heart of the people in Israel and around the world,“ said Rivlin.

Roee Shafir, a restoration expert at the museum, said the repairs would be fairly simple, as the pieces were from a single, complete jar. Archaeologists often face the more daunting task of sifting through piles of shards from multiple objects and trying to piece them together.

Experts used 3D technology, hi-resolution videos, and special glue to painstakingly reconstruct the large jar.

Less than two weeks after it broke, the jar went back on display at the museum. The gluing process left small hairline cracks, and a few pieces are missing, but the jar’s impressive size remains.

The only noticeable difference in the exhibit was a new sign reading “please don’t touch.”

The Canadian Press. All rights reserved.

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