Normally, the temperature in the troposphere decreases with height. In an inversion, it increases. There are several reasons that this can happen, but some results include increased pollution in the summer, and particularly cold mornings in the fall and winter when your cell phone may have some trouble with reception.
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An atmospheric inversion is a deviation from the normal temperature profile of the atmosphere where warmer air lies above cooler air. This phenomenon can lead to the trapping of pollutants, reducing air quality. It is often associated with calm, stable weather conditions.
The primary gas in Earth's atmosphere is nitrogen, accounting for about 78% of the total atmospheric composition.
Pressure
The troposphere is Earth's densest atmospheric layer, containing approximately 75% of the atmosphere's total mass. It is the layer closest to the Earth's surface, extending up to about 7-17 kilometers in altitude.
photosynthetic organisms, like cyanobacteria, which produced oxygen as a byproduct of photosynthesis. This led to the increase in atmospheric oxygen levels, changing the composition of Earth's early atmosphere.
The center of mass of Earth's atmosphere is located close to Earth's geometric center, but it can be slightly influenced by atmospheric circulation patterns and mass distribution. Overall, it is within the region of Earth's core, beneath the crust and atmosphere.