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Atmosphere >> Atmospheric pressure

The atmospheric pressure at the surface of Venus is about 91 Earth atmospheres. This corresponds to the pressure at a depth of about 1 km in the Earth’s oceans.

This monumental pressure is due to intense degassing of rocks at high temperatures; in order words it is a consequence of the extreme greenhouse effect that has dried Venus out and which prevents the formation of carbonates, which on Earth hold a large amount of CO2 in the crust. This explains the omnipresence of carbon dioxide in the Venusian atmosphere.

Evolution of the pressure as a function of altitude given by the VIRA model. One can see a pressure of one atmosphere at an altitude of 50.5 km.

Evolution of the pressure as a function of altitude given by the VIRA model. One can see a pressure of one atmosphere at an altitude of 50.5 km.
(credit: BISA)

 

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