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The three major constituents of Earth's atmosphere are nitrogen, oxygen, and argon. Water vapor accounts for roughly 0.25% of the atmosphere by mass.
25 Ιουν 2024 · The mesosphere also has the atmosphere’s highest clouds. In clear weather, you can sometimes see them as silvery wisps immediately after sunset. They are called noctilucent clouds, or night-shining clouds. The mesosphere is so cold that noctilucent clouds are actually frozen water vapor—ice clouds.
Mesosphere. Pass through the top of the stratosphere and you will find yourself in the mesosphere. This layer extends up to about 80 to 85 km altitude and is marked by another change in...
13 Απρ 2023 · The very scarce water vapor present at the top of the mesosphere forms noctilucent clouds, the highest clouds in Earth’s atmosphere. Most meteors burn up in this atmospheric layer. Sounding rockets and rocket-powered aircraft can reach the mesosphere.
2 Οκτ 2019 · Located between about 80 and 700 kilometers (50 and 440 miles) above Earth’s surface is the thermosphere, whose lowest part contains the ionosphere. In this layer, temperatures increase with altitude due to the very low density of molecules found here. It is both cloud- and water vapor-free.
Water vapor (water in a gas state) is nearly always present, up to about 4% of the total volume. In the Earth’s desert regions (30°N/S), when dry winds are blowing, the water vapor contribution to the composition of the atmosphere will be near zero. Water vapor contribution climbs to near 3% on extremely hot/humid days.
Water vapor in the stratosphere originates from both transport of tropospheric air through the tropical tropopause (Brewer, 1949) and in situ methane oxidation in the middle to upper stratosphere (Jones et al., 1986).
