NASA’s Perseverance Studies the Wild Winds of Jezero Crater NASA Mars Exploration – NASA Mars Exploration

The rovers weather sensors witnessed daily whirlwinds and more while studying the Red Planet.

During its first couple hundred days in Jezero Crater, NASAs Perseverance Mars rover saw some of the most intense dust activity ever witnessed by a mission sent to the Red Planets surface. Not only did the rover detect hundreds of dust-bearing whirlwinds called dust devils, Perseverance captured the first video ever recorded of wind gusts lifting a massive Martian dust cloud.

A paper recently published in Science Advances chronicles the trove of weather phenomena observed in the first 216 Martian days, or sols. The new findings enable scientists to better understand dust processes on Mars and contribute to a body of knowledge that could one day help them predict the dust storms that Mars is famous for and that pose a threat to future robotic and human explorers.

Every time we land in a new place on Mars, its an opportunity to better understand the planets weather, said the papers lead author, Claire Newman of Aeolis Research, a research company focused on planetary atmospheres. She added there may be more exciting weather on the way: We had a regional dust storm right on top of us in January, but were still in the middle of dust season, so were very likely to see more dust storms.

Perseverance made these observations primarily with the rovers cameras and a suite of sensors belonging to the Mars Environmental Dynamics Analyzer (MEDA), a science instrument led by Spains Centro de Astrobiologa in collaboration with the Finnish Meteorological Institute and NASAs Jet Propulsion Laboratory in Southern California. MEDA includes wind sensors, light sensors that can detect whirlwinds as they scatter sunlight around the rover, and a sky-facing camera for capturing images of dust and clouds.

Jezero Crater may be in one of the most active sources of dust on the planet, said Manuel de la Torre Juarez, MEDAs deputy principal investigator at JPL. Everything new we learn about dust will be helpful for future missions.

Frequent Whirlwinds

The study authors found that at least four whirlwinds pass Perseverance on a typical Martian day and that more than one per hour passes by during a peak hourlong period just after noon.

The rovers cameras also documented three occasions in which wind gusts lifted large dust clouds, something the scientists call gust-lifting events. The biggest of these created a massive cloud covering 1.5 square miles (4 square kilometers). The paper estimated that these wind gusts may collectively lift as much or more dust as the whirlwinds that far outnumber them.

We think these gust-liftings are infrequent but could be responsible for a large fraction of the background dust that hovers all the time in the Martian atmosphere, Newman said.

Why Is Jezero Different?

While wind and dust are prevalent all over Mars, what the researchers are finding seems to set Jezero apart. This greater activity may be linked to the crater being near what Newman describes as a dust storm track that runs north to south across the planet, often lifting dust during the dust storm season.

Newman added that the greater activity in Jezero could be due to factors such as the roughness of its surface, which can make it easier for the wind to lift dust. That could be one explanation why NASAs InSight lander in Elysium Planitia, about 2,145 miles (3,452 kilometers) away from Jezero Crater is still waiting for a whirlwind to clear its dust-laden solar panels, while Perseverance has already measured nearby surface dust removal by several passing whirlwinds.

Perseverance is nuclear-powered, but if we had solar panels instead, we probably wouldnt have to worry about dust buildup, Newman said. Theres generally just more dust lifting in Jezero Crater, though average wind speeds are lower there and peak wind speeds and whirlwind activity are comparable to Elysium Planitia.

In fact, Jezeros dust lifting has been more intense than the team would have wanted: Sand carried in whirlwinds damaged MEDAs two wind sensors. The team suspects the sand grains harmed the thin wiring on the wind sensors, which stick out from Perseverances mast. These sensors are particularly vulnerable because they must remain exposed to the wind in order to measure it correctly. Sand grains blown in the wind, and likely carried in whirlwinds, also damaged one of the Curiosity rovers wind sensors (Curiositys other wind sensor was damaged by debris churned up during its landing in Gale Crater).

With Curiositys damage in mind, the Perseverance team provided an additional protective coating to MEDAs wires. Yet Jezeros weather still got the better of them. De la Torre Juarez said the team is testing software changes that should allow the wind sensors to keep working.

We collected a lot of great science data, de la Torre Juarez said. The wind sensors are seriously impacted, ironically, because we got what we wanted to measure.

More About the Mission

A key objective for Perseverances mission on Mars is astrobiology, including the search for signs of ancient microbial life. The rover will characterize the planets geology and past climate, pave the way for human exploration of the Red Planet, and be the first mission to collect and cache Martian rock and regolith (broken rock and dust).

Subsequent NASA missions, in cooperation with ESA (European Space Agency), would send spacecraft to Mars to collect these sealed samples from the surface and return them to Earth for in-depth analysis.

The Mars 2020 Perseverance mission is part of NASAs Moon to Mars exploration approach, which includes Artemis missions to the Moon that will help prepare for human exploration of the Red Planet.

JPL, which is managed for NASA by Caltech in Pasadena, California, built and manages operations of the Perseverance rover.

For more about Perseverance:

mars.nasa.gov/mars2020/

News Media Contacts

Andrew GoodJet Propulsion Laboratory, Pasadena, Calif.818-393-2433andrew.c.good@jpl.nasa.gov

Karen Fox / Alana JohnsonNASA Headquarters, Washington301-286-6284 / 202-358-1501karen.c.fox@nasa.gov / alana.r.johnson@nasa.gov

Visit link:

NASA's Perseverance Studies the Wild Winds of Jezero Crater NASA Mars Exploration - NASA Mars Exploration