Carbon dioxide on Earth weighs 44 g/mol and has a density of around 1.98 kg/m3, about 1.53 times that of air. Nitrogen gas weighs 28 g/mol and has a density of 1.2506 g/L. During limnic eruptions on Earth, where dissolved carbon dioxide suddenly erupts from deep lake waters, and forms a gas cloud capable of suffocating wildlife, livestock, and humans. Because carbon dioxide is heavier than oxygen CO2 displaces O2 in low-lying areas and is fatal. However, does it also displace nitrogen? On Venus, with an atmosphere of 96 % carbon dioxide and 3.5 % nitrogen, this nitrogen permeates the entire atmosphere not being displaced by the heavier gas. How? Why? Perhaps the answer to this mystery is well known but not by me. However, if carbon dioxide does not replace the lighter nitrogen on Earth as well, then this is extremely important when calculating the risk factors for limnic natural disasters because the anaerobic clouds formed will contain both carbon dioxide and nitrogen.
Hi Christopher,
You may read:
Article An experimental study of the mixing of CO2 and N2 under cond...
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CO2 has properties to trap the heat, and gaining the heat it becomes lighter and goes to high altitude. the density of CO2 is too thin to recapture the infrared radiation (heat) that it emits.
Venus has a very dense atmosphere, which is mainly composed of 95% carbon dioxide and a small amount of nitrogen. 3.5% of the mass of this atmosphere is 93 times the mass of the Earth's atmosphere, while its pressure on the planet's surface is equivalent to 92 times the pressure of the Earth's atmosphere on its surface, so the pressure on the surface of Venus is equivalent to the pressure at a depth of about one kilometer below the Earth's circumference. The density of Venus' atmosphere at the surface is 65 kg / m³ (6.5% water density). An atmosphere rich in carbon dioxide and thick clouds of sulfur dioxide generates the strongest heat retention ever in the solar system, which in turn causes the surface temperature to rise to more than 460 ° C. This makes the pink surface warmer than Mercury's, which has a minimum temperature of -220 ° C and a maximum temperature 420 ° C. This is despite the fact that Venus is twice as far from the sun than Mercury is from it, and thus it receives only 25% of Mercury's solar radiation. The surface of Venus is often said to be Hell. Studies indicate that the atmosphere of Venus a few billion years ago was much like the atmosphere of the Earth today, and there may have been large quantities of liquid water on the surface, but the global warming effect - which resulted from the evaporation of the original water - changed this much, as It generated a dangerous level of global warming in the atmosphere that led to the current planet's condition.
The wind's transfer of heat in the planet's lower atmosphere means that the temperature of the pink surface does not vary significantly between the sides of the planet's day and night, despite the planet's very slow rotation. The wind is slow at the surface, moving at a speed of a few kilometers per hour, but due to the high density of the atmosphere at the pink surface, it exerts a remarkable amount of its movement force to resist obstructions, and move dust and small stones across the surface. This alone makes walking on the surface of Venus difficult for humans, even if heat and lack of oxygen are not a problem.
Venus' atmosphere is mostly composed of carbon dioxide. It contains minor amounts of nitrogen and other trace elements, including compounds based on hydrogen, nitrogen, sulphur, carbon, and oxygen. The atmosphere of Venus is much hotter and denser than that of Earth, though shallower. As greenhouse gases warm a lower atmosphere, they cool the upper atmosphere, leading to compact thermospheres. By some definitions, Venus has no stratosphere.
The troposphere begins at the surface and extends up to an altitude of 65 kilometres (an altitude at which the mesosphere has already been reached on Earth). At the top of the troposphere, temperature and pressure reach Earth-like levels. Winds at the surface are a few metres per second, reaching 70 m/s or more in the upper troposphere. The stratosphere and mesosphere extend from 65 km to 95 km in height. The thermosphere and exosphere begin at around 95 kilometres, eventually reaching the limit of the atmosphere at about 220 to 250 km.
The air pressure at Venus' surface is about 92 times that of the Earth. The enormous amount of CO2 in the atmosphere creates a strong greenhouse effect, raising the surface temperature to around 470 °C, hotter than that of any other planet in the Solar System.
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