New technology to detect volcanic ash that threatens airplanes could help prevent a repeat of the air traffic chaos that followed a 2010 volcanic eruption in Iceland.
Private companies are developing infrared detectors to scout out ash levels in the air, ahead of flying aircraft. The plane-mounted sensors will give pilots time to divert around dangerous ash plumes.
Government agencies are also working to improve their space-based monitoring systems. With satellites, scientists can detect tiny ash particles, but predicting where aircraft can safely fly is still a major hurdle. [Big Blasts: History's 10 Most Destructive Volcanoes]
"The key issue for us is to develop an integrated monitoring and response system for future volcanic crises that can be used to respond quickly in the event of the formation of an ash cloud from Iceland," Hans Schlager, head of the Institute of Atmospheric Physics at the German Aerospace Center, said in a statement.
Ash particles are jagged and sharp. The fine, glassy rock can damage and abrade engines, windows and other structures on aircraft flying at all altitudes.
The German Aerospace Center, also called DLR, is upgrading its ash-detection system and its air traffic control methods so that fewer planes will be stuck on the ground the next time a volcano in Iceland spews ash toward Europe. Tests are being run based on the 2010 eruption of the Eyjafjallajkull volcano, when approximately 100,000 flights had to be canceled and 10 million passengers were stranded.
The DLR researchers said that if they had employed these newly developed models for predicting the complex movement of ash through the air and rejiggered algorithms for rerouting flights around bad weather, they think they could have doubled the number of flights on a single day during the crisis. Instead of just 5,000 flights on April 17, 2010, around 10,700 flights could have taken place.
Volcanic ash plumes regularly plague travelers, though the delays are typically on a more regional scale than the Eyjafjallajkull eruption, which cost airlines $1.7 billion in lost revenue, according to the International Air Transport Association, an industry group.
For example, North Sumatra's Kualanamu International Airport temporarily halted operations in 2013 following eruptions at Mount Sinabung, some 30 miles away. And blasts at Sicily's Mount Etna often stop flights at Catania's Fontanarossa Airport. Air travel between Australia and Bali was disrupted in May by Indonesia's Sangeang Api volcano.
NASA researchers are also looking for new ways to improve forecasts of volcanic ash hazards. Satellites such as the CALIPSO mission, which tracks atmospheric particles, can also locate ash days to weeks after an eruption, according to a study published in the September 2013 Journal of Applied Meteorology and Climatology. The satellite can distinguish between ash plumes and clouds, and can provide more accurate forecasts, the researchers said.
"The Icelandic eruption such a dramatic event made us take a hard look at what each of our satellites can tell us," John Murray, associate program manager for the NASA Applied Sciences Program's natural disasters focus area, said in a statement. "We knew we needed to understand how to integrate them to make better forecasts.
No system will be perfect, though. That's why Nicarnica Aviation in Kjeller, Norway, has invented an ash detector that attaches to a plane, so pilots receive a warning before flying into dangerous particles.
The infrared camera is now undergoing ground-based testing at Iceland's Holuhraun eruption, where it caught toxic volcano tornados spinning in sulfurous gas spewing from the fiery lava. The sensors have also received air trials from Airbus and EasyJet.
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