Could the Dust Bowl Ever Happen Again

Cached farm machinery in Dallas, South Dakota during the Dust Bowl in 1936. United states Section of Agriculture

A new study shows dust storms have become more mutual and more astringent on the Great Plains, leading some to wonder if the United states of america is headed for some other Dust Bowl, reports Roland Pease for Science. With well-nigh half the country currently in drought and a winter forecast predicting connected dry weather for many of the afflicted regions, dust storms could become an even bigger threat.

In the 1930s, the Dust Bowl was caused by years of severe drought and featured dust storms upwardly to one,000 miles long. But the other driving force backside the plumes of dust that ravaged the mural was the conversion of prairie to agricultural fields on a massive scale—between 1925 and the early 1930s, farmers converted 5.2 million acres of grassland over to farming, reported Sarah Zielinski for Smithsonian magazine in 2012.

Hardy prairie grasses would have probable withstood the drought, merely crops covering the newly converted tracts swiftly bit the proverbial dust, which loosened the grip their roots had on the soil. High winds then whipped that loose soil into the huge clouds that blanketed the landscape with grit, including 1935's Black Sunday which lifted 300,000 tons of the stuff skyward.

Likewise blotting out the sun, grit storms strip valuable nutrients from the soils, making the land less productive, and create a significant health risk at a time when a respiratory illness is sickening people around the world, according to Science.

A graphic representing the hazards of increasing atmospheric dust. Talie Lambert

The new research, published earlier this month in the periodical Geophysical Enquiry Letters, used data from NASA satellites and footing monitoring systems to detect a steady increase in the corporeality of dust being kicked into the atmosphere every twelvemonth, reports Brooks Hays for United Press International. The researchers found that levels of atmospheric dust swirling in a higher place the Great Plains region doubled between 2000 and 2018.

According to the paper, the increasing levels of grit, up to v percent per year, coincided with worsening climatic change and a v to x percent expansion of farmland across the Nifty Plains that mirrors the prelude to the Dust Bowl. Together, the researchers suggest these factors may drive the U.S. toward a 2d Grit Bowl.

"We tin't make changes to the earth surface without some kind of result just as we can't burn fossil fuels without consequences," says Andrew Lambert, a meteorologist at the U.Southward. Naval Research Laboratory and the paper'south first author, in a statement. "And then while the agronomics industry is absolutely important, we need to call back more carefully about where and how we found."

Role of what allowed Lambert and his colleagues to tie the added dust in the sky to agronomics were articulate regional upticks when and where major crops such as corn and soybeans were planted and harvested, per the statement. Ironically, much of the grassland that was converted to agriculture in recent years was not for food only for corn destined to go fodder for biofuels intended to reduce reliance on fossil fuels, Lambert tells Scientific discipline.

Human-caused climate change is also making the Great Plains hotter and drier. In April, a paper published in the journal Science said the Southwestern office of North America may be entering a megadrought worse than annihilation seen in ane,200 years.

"The current drought ranks correct up there with the worst in more than a thousand years, and there's a human influence on this of at least 30 percent and possibly equally much as 50 percent in terms of its severity," as Jason Smerdon, a paleoclimatologist at Columbia Academy's Lamont Doherty Earth Observatory who co-authored the study, told Smithsonian magazine's Brian Handwerk at the time.

Merely last week, a big dust storm struck eastern Colorado, reports Jesse Sarles for CBS Denver.

"I think information technology's fair to say that what'southward happening with dust trends in the Midwest and the Keen Plains is an indicator that the threat is real if cropland expansion continues to occur at this rate and drought adventure does increase because of climatic change," Lambert says in the statement. "Those would be the ingredients for another Dust Basin."

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Source: https://www.smithsonianmag.com/smart-news/are-great-plains-headed-another-dust-bowl-180976117/

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