ISROs Mangalyaan Mission Data used to Investigate Ancient Megafloods on Mars

Defense News - In the ancient epochs of Mars, when the Red Planet was not the arid expanse we know today, it boasted a lush environment with a thick atmosphere and liquid water gracing its surface. Delving into this intriguing past, researchers from the Indian Institute of Remote Sensing and the Indian Institute of Technology, Bombay, have undertaken a comprehensive exploration of ancient megafloods on Mars. Leveraging data obtained from the Mangalyaan mission, India maiden venture to the Red Planet, they have unraveled key details about the velocity and volume of these dramatic events.

Signs of Mars" watery history manifest in various ways, from colossal piles of transported debris covering vast distances to the indelible imprints of turbulent waves etched onto the Martian ground. Eroded layers of sedimentary deposits bear witness to the planet bygone aqueous epochs. While the presence of water in Mars" ancient history is well-established, the specific timeline of its existence, and the enigmatic vanishing act of all that water, continue to baffle scientists. Thanks to ongoing advancements in Martian spacecraft, our understanding of these mysteries is evolving. The latest insights come from Indian researchers utilizing data from the Mars Orbiter Mission (MOM), also known as Mangalyaan, launched by the Indian Space Research Organisation (ISRO).

The scientists meticulously traced the remnants of outflow channels, marking ancient flooding events that sculpted the Martian landscape. Their focus honed in on four regions—Mangala, Kasei, Ravi, and Maadim—all intricate networks of intersecting channels. Each of these areas experienced periodic flooding, potentially linked to intermittent volcanic activity. Spanning hundreds of kilometers across Mars, these outflow channel systems, known as "valles," showcase a rugged terrain shaped by the forceful flow of copious amounts of water. Employing advanced modeling techniques, researchers estimated the quantities and velocities of water coursing through these channels.

For instance, the colossal Kasei Valles witnessed the movement of approximately 3.5 billion cubic meters of water at velocities exceeding 20 meters per second. Stretching over 2,000 kilometers with a maximum width of 260 meters, Kasei Valles stands out as the largest among the four discharge channels scrutinized in the study. These findings not only deepen our understanding of Mars" ancient hydrology but also serve as valuable guides for future missions to the Red Planet. Armed with insights into the specific regions where Mars once hosted water, scientists can direct their focus towards uncovering potential signs of ancient Martian life. The detailed findings of this research have been published in the journal Current Science.