Mars is carrying a bit of a dustup. The whole aspect is now smothered in a “planet-encircling” dirt charge that began dual weeks ago, and swelled into a tellurian event that forced NASA to suspend operations for a Opportunity rover.
Mars is no foreigner to dirt storms, though this one isn’t a run-of-the-mill tempest. It’s distant some-more gargantuan. These tellurian storms start usually once each 5.5 years or so, swallowing adult a whole world in a cloud of red.
The dirt storms on Mars work mostly a same as they do on Earth. You have high winds that hurl opposite a aspect and pierce tiny grains forward, on a sequence a few hundred microns in size. These grains rebound adult into a air, and once they’re usually a few centimeters adult a increasing turmoil takes them aloft and higher. Take that conditions and watch it cascade into something abhorrently larger, and we have yourself a dirt storm—capable of rising dirt adult to 20 kilometers in a air, covering adult vast swaths of land.
“The pretence on Mars,” says Don Banfield, a heavenly scientist during Cornell University, “is that a atmosphere firmness is usually about one percent of what it is on Earth, since Mars has a unequivocally low windy pressure. The winds will have to be faster to pierce a particles on Mars around, though it will come off as some-more or reduction a same force.” Those winds during these storms tip off during 60 miles per hour, though due to a miss of atmosphere, they’ll finish adult feeling like usually a lovely breeze.” (Sorry, Mark Watney).
Tanya Harrison, a heavenly scientist during Arizona State University, explains that feverishness is a pushing force behind dirt storms on Mars. “If we have object that reaches a aspect and heats it up, that creates an instability where comfortable atmosphere rises up. On Mars, there’s so most of this lax dirt fibbing on a aspect that when we have these ceiling winds, they take a lot of a dirt with it.” The particulate dirt is so excellent and small—way smaller than silt on Earth—that it usually hangs in a air, and takes a unequivocally prolonged time to settle.
Article source: https://www.popsci.com/mars-global-dust-storm