A new Climate Model Suggests That Venus Never had Oceans - Universe Today
Oct 26, 2021 1 min, 38 secs
While many believe that Venus’s surface was covered in large bodies of water, a recent study has contradicted this claim.

At first, the dense clouds that obscure the surface were thought to be rainclouds, which fueled speculation that Venus’ surface was covered in oceans.

Like the other rocky planets (Mercury, Earth, and Mars), the accretion process left Venus covered in magma for much of its early history.

While Venus was also very different, the existence of surface water has remained an unresolved question.

In the first one, Venus had liquid water oceans on the surface, and this global resurfacing (which could have started well before 500 Mya) coincided with the complete evaporation of the oceans.

From this, the team studied how Earth and Venus evolved over time and whether oceans could form in the process.

Both studies showed that clouds would mostly form on the dayside of Venus, which would produce an intense cooling and stabilize temperatures to the point that water would condense to have rain.

However, the climate model used by Turbet and his colleagues indicated that clouds were more likely to have formed on the night side of Venus, where they wouldn’t be able to shield the surface.

According to this climate model, cloud cover on Venus would have helped maintain high surface temperatures by causing a greenhouse effect that trapped heat in the planet’s dense atmosphere.

These high temperatures prevented any rainfall, thereby ensuring that oceans could never form on Venus’ surface.

Our results show that it may be even more important to understand the earlier evolution of Venus, to identify whether or not oceans ever formed on the surface of Venus.”!

Fortunately, there are several proposed missions to explore Venus’ atmosphere and surface in the next decade, including the ESA’s EnVision, NASA’s Venus Emissivity, Radio Science, InSAR, Topography & Spectroscopy (VERITAS), and Deep Atmosphere of Venus Investigation of Noble Gases, Chemistry, and Imaging (DAVINCI+), and the Russian Venera-D mission.

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