A Lake of Changing Depths
Early in the history of the Jezero Crater’s former lake, its levels are thought to have been high enough to crest the crater’s eastern rim, where orbital imagery shows the remains of an outflow river channel. The new paper adds to this thinking, describing the size of Jezero’s lake fluctuating greatly over time, its water level rising and falling by tens of yards before the body of water eventually disappeared altogether.
While it’s unknown if these swings in the water level resulted from flooding or more gradual environmental changes, the science team has determined that they occurred later in the Jezero delta’s history, when lake levels were at least 330 feet (100 meters) below the lake’s highest level. And the team is looking forward to making more insights in the future: The delta will be the starting point for the rover team’s upcoming second science campaign next year.
“A better understanding of Jezero’s delta is a key to understanding the change in hydrology for the area,” said Gupta, “and it could potentially provide valuable insights into why the entire planet dried out.”
About NASA’s Perseverance Mars Rover
A key objective for Perseverance’s mission on Mars is astrobiology, including the search for signs of ancient microbial life. The rover will characterize the planet’s 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.
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 NASA’s 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: