Between 0 and 4 percent of the Earth's atmosphere is made up of water vapor. The amount of water vapor present in the atmosphere, also known as humidity, is the most variable characteristic of the atmosphere and is largely dependent on air temperature.
At 86 degrees Fahrenheit, a volume of air can hold up to 4 percent water vapor. At minus 40 F, air can hold no more than 0.2 percent water vapor.
Water vapor enters the atmosphere by way of evaporation from the Earth's surface. When a volume of air holds the maximum amount of water vapor possible for a given temperature, it is said to be saturated and has a relative humidity of 100 percent.Learn More
According to USA Today, the coldest time of the day comes just before sunrise because the earth has had all night to expel the heat from the previous day into the atmosphere. As soon as the sun begins to rise, the earth will immediately begin to heat up once again.Full Answer >
In meteorology, temperature inversions occur in the layer of the atmosphere closest to the Earth's surface, known as the troposphere. Temperature inversions in the atmosphere occur when a cool layer of air close to the Earth's surface is covered by a warm layer above.Full Answer >
The sky is a common term for Earth's atmosphere, which is approximately 60 miles thick, according to NASA. The atmosphere is composed of different levels, with the exosphere marking the boundary of space. According to University at Albany, the exosphere observable from space extends 60,000 miles minimum from Earth's surface.Full Answer >
The thermosphere is a layer of the Earth's atmosphere situated directly above the mesosphere and below the exosphere. The thermosphere performs several important functions, such as temperature regulation and filtering powerful X-rays and ultraviolet radiation emitted by the sun. The thermosphere has the unique ability to expand to absorb heat and contains a diverse range of temperatures throughout its different layers.Full Answer >