News / Science & Technology

Western US Drought Causing Earth's Crust to Rise

A GPS station is seen in the Inyo Mountains of California. (Shawn Lawrence, UNAVCO)
A GPS station is seen in the Inyo Mountains of California. (Shawn Lawrence, UNAVCO)

The major drought gripping the western United States is not only drying the landscape, it’s causing the land to rise.

Researchers at Scripps Institution of Oceanography at the University of California at San Diego used GPS data to determine the drought has caused the land to rise, on average, 4 millimeters across the western states. The Sierra mountains of California rose over half an inch.

Duncan Agnew, a Scripps Oceanography geophysics professor and co-author of the paper said that “in areas of deep soil, the material behaves like a sponge. When the water dries out, it shrinks or goes down.”

“If you’re not on deep spoil the effect is that the earth is like a spring,” he said “The water is no longer pressing down on that area so it rises.”

That’s what’s happening in the western U.S., and the findings quantify the staggering water loss wrought by the drought.

Based on the findings, Agnew said he and his team believe the water loss due to the drought exceeds 240 trillion liters of water.

“It’s like covering the western half of the U.S. with a layer of water 10 centimeters thick,” he said.

If the drought lifts, expect the land to fall under the weight of the water. In fact, Agnew said, there was a downward shift in 2011, which saw a very wet winter.

Agnew said the rise would not effect California’s earthquake prone San Andreas Fault.

“It does change the stress on the fault, but by a very small amount,” he said. “It’s the same pressure you’d feel putting your hand in an inch of water.”

Last year was the driest on record in California, and this year may be just as dry.  

Some reservoirs are empty and the Sierra mountain snowpack, which melts and fills rivers in the springtime, is at dangerously low levels - just one quarter of normal.  

Farmers warn of another "Dust Bowl" - referring to the drought and dust storms that ravaged American farmlands in the 1930s.  

The drought is so bad that California Governor Jerry Brown called it “epochal.”

Eighty percent of the state is experiencing “extreme” or “exceptional” drought, leading to strict measures restricting the use of water.

Agnew’s paper appears in the August 21 online edition of the journal Science.

You May Like

Beloved Lion Killing Sparks Virtual, Real Life Outrage

Twitter, as usual, was epicenter for anger directed at Palmer, with some questioning his manhood, calling for him to be released into the wild More

Video Booming London Property Market a Haven for Dirty Money

Billions of dollars from proceeds of crime, especially from Russia, being laundered through London property market, according to anti-corruption activists More

Video Scouts' Decision on Gays Meets Acceptance in Founder's Hometown

One former Scout leader thinks organization will move past political, social debate, get back to its primary focus of turning boys into good citizens More

This forum has been closed.
Comment Sorting
Comments
     
by: tom carney from: new jersey
September 01, 2014 5:25 PM
In about 700-800 AD wasn't there a 200-year drought over what is now the American Southwest? Didn't it last long enough and be severe enough to move whole peoples from the area of Chaco Canyon and Mesa Verde down to where today's North American Pueblos are? If true, this is really not a unique situation, no? Just unique in our times?

by: Mark from: Arizona
August 24, 2014 1:51 PM
We are fine with water in Arizona. Been raining here all over for 2 months now.

Featured Videos

Your JavaScript is turned off or you have an old version of Adobe's Flash Player. Get the latest Flash player.
Booming London Property a ‘Haven for Dirty Money’i
X
July 29, 2015 9:34 PM
Billions of dollars of so-called ‘dirty money’ from the proceeds of crime - especially from Russia - are being laundered through the London property market, according to anti-corruption activists. As Henry Ridgwell reports from the British capital, the government has pledged to crack down on the practice.
Video

Video Booming London Property a ‘Haven for Dirty Money’

Billions of dollars of so-called ‘dirty money’ from the proceeds of crime - especially from Russia - are being laundered through the London property market, according to anti-corruption activists. As Henry Ridgwell reports from the British capital, the government has pledged to crack down on the practice.
Video

Video Scouts' Decision on Gays Meets Acceptance in Founder's Hometown

Ottawa, Illinois, is the hometown of W.D. Boyce, who founded the Boy Scouts of America in 1910. In Ottawa, where Scouting remains an important part of the legacy of the community, the end of the organization's ban on openly gay adult leaders was seen as inevitable. VOA's Kane Farabaugh reports.
Video

Video 'Metal Muscles' Flex a New Bionic Hand

Artificial limbs, including the most complex of them – the human hand – are getting more life-like and useful due to constant advances in tiny hydraulic, pneumatic and electric motors called actuators. But now, as VOA’s George Putic reports, scientists in Germany say the future of the prosthetic hand may lie not in motors but in wires that can ‘remember’ their shape.
Video

Video Russia Accused of Abusing Interpol to Pursue Opponents

A British pro-democracy group has accused Russia of abusing the global law enforcement agency Interpol by requesting the arrest and extradition of political opponents. A new report by the group notes such requests can mean the accused are unable to travel and are often unable to open bank accounts. VOA's Henry Ridgwell reports.
Video

Video 'Positive Atmosphere' Points Toward TPP Trade Deal in Hawaii

Talks on a major new trade agreement among 12 Pacific Rim nations are said to be nearing completion in Hawaii. Some trade experts say the "positive atmosphere" at the discussions could mean a deal is within reach, but there is still hard bargaining to be done over many issues and products, including U.S. drugs and Japanese rice. VOA's Jim Randle reports.
Video

Video Genome Initiative Urgently Moves to Freeze DNA Before Species Go Extinct

Earth is in the midst of its sixth mass extinction. The last such event was caused by an asteroid 66 million years ago. It killed off the dinosaurs and practically everything else. So scientists are in a race against time to classify the estimated 11 million species alive today. So far only 2 million are described by science, and researchers are worried many will disappear before they even have a name. VOA’s Rosanne Skirble reports.
Video

Video Scientists: One-Dose Malaria Cure is Possible

Scientists have long been trying to develop an effective protection and cure for malaria - one of the deadliest diseases that affects people in tropical areas, especially children. As the World Health Organization announces plans to begin clinical trials of a promising new vaccine, scientists in South Africa report that they too are at an important threshold. George Putic reports, they are testing a compound that could be a single-dose cure for malaria.
Video

Video 'New York' Magazine Features 35 Cosby Accusers

The latest issue of 'New York' magazine features 35 women who say they were drugged and raped by film and television celebrity Bill Cosby. The women are aged from 44 to 80 and come from different walks of life and races. The magazine interviewed each of them separately, but Zlatica Hoke reports their stories are similar.
Video

Video US Calls Fight Against Human Trafficking a Must Win

The United States is promising not to give up its fight against what Secretary of State John Kerry calls the “scourge” of modern slavery. Officials released the country’s annual human trafficking report Monday – a report that’s being met with some criticism. VOA’s National Security correspondent Jeff Seldin has more from the State Department.
Video

Video Washington DC Underground Streetcar Station to Become Arts Venue

Abandoned more than 50 years ago, the underground streetcar station in Washington D.C.’s historic DuPont Circle district is about to be reborn. The plan calls for turning the spacious underground platforms - once meant to be a transportation hub, - into a unique space for art exhibitions, presentations, concerts and even a film set. Roman Mamonov has more from beneath the streets of the U.S. capital. Joy Wagner narrates his report.
Video

Video Europe’s Twin Crises Collide in Greece as Migrant Numbers Soar

Greece has replaced Italy as the main gateway for migrants into Europe, with more than 100,000 arrivals in the first six months of 2015. Many want to move further into Europe and escape Greece’s economic crisis, but they face widespread dangers on the journey overland through the Balkans. VOA's Henry Ridgwell reports.
Video

Video Stink Intensifies as Lebanon’s Trash Crisis Continues

After the closure of a major rubbish dump a week ago, the streets of Beirut are filling up with trash. Having failed to draw up a plan B, politicians are struggling to deal with the problem. John Owens has more for VOA from Beirut.
Video

Video Paris Rolls Out Blueprint to Fight Climate Change

A U.N. climate conference in December aims to produce an ambitious agreement to fight heat-trapping greenhouse gases. But many local governments are not waiting, and have drafted their own climate action plans. That’s the case with Paris — which is getting special attention, since it’s hosting the climate summit. Lisa Bryant takes a look for VOA at the transformation of the French capital into an eco-city.
Video

Video Racially Diverse Spider-Man Takes Center Stage

Whether it’s in a comic book or on the big screen, fans have always known the man behind the Spider-Man mask as Peter Parker. But that is changing, at least in the comic book world. Marvel Comics announced that a character called Miles Morales will replace Peter Parker as Spider-Man in a new comic book series. He is half Latino, half African American, and he is quite popular among comic book fans. Correspondent Elizabeth Lee reports from Los Angeles.
Video

Video Historic Symbol Is Theme of Vibrant New Show

A new exhibit in Washington is paying tribute to the American flag with a wide and eclectic selection of artwork that uses the historic symbol as its central theme. VOA’s Julie Taboh was at the DC Chamber of Commerce for the show’s opening.

VOA Blogs