Just like fish are unaware of the water they live in, we humans take our atmosphere for granted. However, water in the atmosphere periodically reminds us of air's existence especially when there is no wind that we can feel
Water droplets in the atmosphere |
| Source - nationalgeographic.com |
Clouds are water droplets and ice crystals suspended in the air. Water vapor condenses to liquid form when the air becomes saturated and condensation nuclei are available to catalyze condensation.The two common ways for saturation to produce clouds are:- Add moisture to the air through evaporation
- Cool the air to its dew point
Artificial Clouds |
| Source - Wikipedia.org |
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| Source - skystef.be |
Carbon-dioxide and water vapor are the primary products of hydrocarbon combustion. Contrails, visible condensation trails, are formed behind aircraft when water vapor in the air and/or in engine exhaust condense. Contrails are more visible at higher altitudes where the temperature is low (-40 degrees) and where the reduction in pressure behind an airplane cools water vapor that can condense onto particulates in the exhaust.
Seeing our Breath |
| Source - sixmartinis.blogspot.com |
On a cold day, we can "see our breath" because we exhale water vapor that becomes chilled to the point where the vapor condenses into a fog before our eyes.
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