Mars’ın en tuhaf bulutu nadir bir atmosfer süreciyle oluşuyor olabilir

Each morning for several months in the southern Martian spring and summer, a water-ice cloud appears beside the 20-kilometre-high Arsia Mons volcano. The Arsia Mons Elongated Cloud can stretch up to 1,800 kilometres before evaporating, yet earlier simulations failed to reproduce it. Researchers combined Mars Express observations with an advanced weather model and found that an unusual process may explain its formation. Most clouds develop when water vapour condenses or freezes on particles such as dust, a mechanism called heterogeneous nucleation. In the new simulation, however, a powerful atmospheric wave lifts moist air several kilometres within minutes. The air cools by about 30 degrees in ten minutes, while relative humidity rises to extraordinary levels. Under these conditions, water vapour can freeze directly into ice particles through homogeneous nucleation, without dust acting as a nucleus. Although some modelled details still differ from observations, the result suggests that theoretically rare physics may operate in planetary atmospheres.