Mmastodon ScienceScience first seen 15 h ago, last 6 h ago, peak #2

Mars volcano spawns a 1,600 km morning cloud

Original: 🔴 NEW: A 1,600 km (1,000 mi) long cloud forms above # Mars ’ # ArsiaMons volcano nearly every morning in spring and summ

Scientists have explained a recurring phenomenon on Mars: every spring and summer morning, a cloud roughly 1,600 km (1,000 miles) long forms above Arsia Mons, one of the planet's giant volcanoes, before evaporating within hours. New simulations show that winds rising over the 19 km (12 mile) peak cool so rapidly that water vapor freezes directly into ice, producing the dramatic elongated cloud.

Why now: New research offers the first solid explanation for a striking and long-puzzling Martian cloud formation.

MarsArsia Mons

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Evidence

• 🔴 NEW: A 1,600 km (1,000 mi) long cloud forms above # Mars ’ # ArsiaMons volcano nearly every morning in spring and summer, then evaporates within hours. New simulations show wind rising over the 19 km (12 mi) peak cools so fast that water vapor freezes directly into # ice… · tksst@fediscience.org · 5

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