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Why does weather occur in the troposphere?

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First of all, the assumption is wrong: There is weather in other layers of Earth's atmosphere, especially in the stratosphere. Probably the most spectacular example are polar stratospheric clouds. read more

But it’s correct that most of what we call weather does take place in the troposphere. The main reason why most of the weather takes place in the troposphere is because it is next to the surface, hence next to the most important supply for weather processes, the water vapor that comes from the oceans. read more

The troposphere (from Greek: tropein - to change, circulate or mix) is the lowermost layer of the Earth's atmosphere. Most of the weather phenomena, systems, convection, turbulence and clouds occur in this layer, although some may extend into the lower portion of the stratosphere. read more

The temperature reaches its lowest in the tropopause which is like a temperature plateau or barrier between the troposphere and the stratosphere. Above the tropopause the temperature begins to rise again because ozone in the stratosphere holds onto heat from the sun. read more

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