Portuguese scientists study Martian clouds to aid future landings

Key facts

• Portuguese scientists have published a study analyzing Martian clouds to improve future landing missions.
• The research utilized data from the European Space Agency's Mars Express spacecraft.
• Understanding atmospheric waves and their dynamics is key to controlling friction during landings.
• Mars' thin atmosphere presents unique challenges, making landings akin to freefall.
• Clouds on Mars are seasonal and sparse, primarily forming during the northern hemisphere summer.
• The findings could help optimize mission timing to avoid atmospheric turbulence.

Portuguese scientists have published a study analyzing Martian clouds to enhance future landing missions on the Red Planet. The research, led by Francisco Brasil and Pedro Machado from the Faculty of Sciences of the University of Lisbon and the Institute of Astrophysics and Space Sciences, utilized data from the European Space Agency's Mars Express mission.

The study focused on measuring the altitude and propagation speed of Martian atmospheric waves, which are crucial for understanding energy transport and atmospheric dynamics. This information is vital for controlling the friction experienced by spacecraft during descent, especially given Mars' thin atmosphere, which offers significantly less resistance than Earth's.

Francisco Brasil explained that a lack of detailed atmospheric information has historically made Mars landings difficult, with nearly half of missions since 1960 failing. However, recent advancements in spacecraft technology, including improved parachutes and shock-absorbing systems, have increased landing success rates.

The research also highlighted that clouds on Mars are seasonal and sparse, forming mainly during the northern hemisphere summer due to the evaporation of polar ice caps. This seasonality means that cloud cover and atmospheric turbulence can vary significantly throughout the Martian year.

By understanding these atmospheric conditions, scientists hope to better predict and manage the challenges of landing spacecraft, and eventually humans, on Mars. The planet's atmosphere is also being studied as a natural laboratory for phenomena seen on Earth, such as global dust storms, the triggers for which are still not fully understood.