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The concentration of water vapor (a greenhouse gas) varies significantly from around 10 ppm by volume in the coldest portions of the atmosphere to as much as 5% by volume in hot, humid air masses, and concentrations of other atmospheric gases are typically quoted in terms of dry air (without water vapor).
The atmosphere of Earth protects life on Earth by creating pressure allowing for liquid water to exist on the Earth's surface, absorbing ultraviolet solar radiation, warming the surface through heat retention (greenhouse effect), and reducing temperature extremes between day and night (the diurnal temperature variation).By volume, dry air contains 78.09% nitrogen, 20.95% oxygen, 0.93% argon, 0.04% carbon dioxide, and small amounts of other gases.Air also contains a variable amount of water vapor, on average around 1% at sea level, and 0.4% over the entire atmosphere.The exosphere is located too far above Earth for any meteorological phenomena to be possible.However, the aurora borealis and aurora australis sometimes occur in the lower part of the exosphere, where they overlap into the thermosphere.Sevgili okurlarım, öncelikle benimle beraber olduğunuz için teşekkür etmek isterim…
Sizlerle daha yakın bir ilişki kurmayı hep istedim. Şimdi hazır yaz geldi, baharda çiçek açmış duygularımızın meyveleri olgunlaşmaya başladı, size yeni bir hizmetim var!The three major constituents of air, and therefore of Earth's atmosphere, are nitrogen, oxygen, and argon.Water vapor accounts for roughly 0.25% of the atmosphere by mass.The study of Earth's atmosphere and its processes is called atmospheric science (aerology).Early pioneers in the field include Léon Teisserenc de Bort and Richard Assmann.Thus, the exosphere no longer behaves like a gas, and the particles constantly escape into space.