An analysis of the topic of the earths atmosphere as a continuous motion
For example, on an overcast day when you cannot see your shadow there is no direct radiation reaching you, it has all been scattered. The two most important instruments for taking measurements in Earth's atmosphere were developed hundreds of years ago: Galileo is credited with inventing the thermometer inand Evangelista Torricelli invented the barometer in But we can speed the process up with the lighting of a match.
This temperature decrease results from the rapidly decreasing density of the air at this altitude. Unsourced material may be challenged and removed.
There, moist air is warmed by the Earth's surface, decreases in density and rises.
Here, the chemical composition varies with altitude. Free oxygen may have been added to the atmosphere by primitive organisms, probably bacteriaduring photosynthesis.
Composition of earths atmosphere
October See also: Sunlight Solar radiation or sunlight is the energy Earth receives from the Sun. The mesosphere has the coldest temperatures in the atmosphere, dipping as low as degrees Celsius degrees Fahrenheit, or kelvin. Their atmospheres are almost entirely hydrogen and helium. This section does not cite any sources. This is why mountaintops are usually much colder than the valleys beneath. Throughout the 18th and 19th centuries, kite-mounted instruments collected pressure, temperature, and humidity readings; unfortunately, scientists could only reach up to an altitude of about 3 km with this technique. This rise in temperature is caused by the absorption of ultraviolet radiation UV radiation from the Sun by the ozone layer , which restricts turbulence and mixing. Figure 2: Scientist launches a radiosonde. Within the troposphere , temperature decreases with altitude at a rate of about 6. Latitudinal circulation features[ edit ] An idealised view of three large circulation cells showing surface winds Vertical velocity at hPa, July average. The atmosphere on Mars is also dominated by carbon dioxide, although unlike Venus, it is quite thin. Troposphere Main article: Troposphere The troposphere is the lowest layer of Earth's atmosphere.
Atmospheric pressure can be imagined as the weight of the overlying column of air.
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