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This is the reason that one can frequently tune in to more distant radio stations at night than during the day. As of this date, Scribd will manage your SlideShare account and any content you may have on SlideShare, and Scribd's General Terms of Use and Privacy Policy will apply. An examination of the historical records revealed that the springtime ozone losses had begun around the late 1960s and had grown much more severe by the late 1970s. ." The upper mesosphere and lower thermosphere are called the ionosphere, this region is important to radio communications, because radio waves can bounce off the layer and travel great distances. This quantity is known as the lapse rate. The particles in aerosols cover a wide range of sizes. Within the stratosphere, air temperature changes little with altitude, and there are few convective air currents. Exosphere - the upper part of the thermosphere. The amount of ozone in the stratosphere is small. Nitrogen, being unreactive, was left behind to become the most common gas in the atmosphere. Apart from all this, these rays also decrease the process of photosynthesis, supersonic jets fly at the height of 20 km above the land surface and they emit nitrogen oxide which also affects the ozone layer. See our User Agreement and Privacy Policy. If this is sustained, the atmosphere is said to be unstable, and the rising parcel of air will cool to the point where its water vapor condenses to form cloud droplets. Earth’s atmosphere has a layered structure. A secondary atmosphere began to form when gases were released from the crust of the early Earth by volcanic activity. The last two steps of this cycle repeat themselves but do not create any new chemical compounds; they only act to absorb ultraviolet radiation. Carbon dioxide is required by plant life for photosynthesis, the process of using sunlight to store energy as simple sugars, upon which all life on Earth depends. The size of some aerosol particles allows them to efficiently scatter sunlight and create atmospheric haze. Ozone (O3) is found almost exclusively in a layer about 9–36 mi (15–60 km) in altitude. Boundaries of these layers are also arbitrarily established as other natural boundaries.

Troposphere is the closest to the Earth’s surface and contains water vapor (clouds), moisture, dust, etc. Infrared radiation —Radiation similar to visible light but of slightly longer wavelength. At average its height is upto 12 kilometer from ground. Content Guidelines 2. This effectively removed carbon dioxide from the atmosphere and left a net increase in oxygen. Short wavelength rays of solar energy (UV, X, L) get absorbed by molecules and atoms of nitrogen and oxygen because of which temperature increases upto 1000°C in this scanty pressure layer of atmosphere. Greenhouse gas molecules absorb some of this radiation before it escapes to space, and re-emit some of it back toward the surface.

Because of depletion of ozone ultra-violet rays are increasing the temperature of Earth. The troposphere is the lowest layer of our atmosphere. Water vapor (H2 O) is found in the atmosphere in small and highly variable amounts. Layers of Earth's Atmosphere Troposphere. Another layer, called the ionosphere, extends from the mesosphere to the exosphere. Hi there! The atmosphere can be divided into vertical layers determined by the way temperature changes with altitude. Just under 1% of the atmosphere is made up of argon (Ar), which is an inert noble gas, meaning that it does not take part in any chemical reactions under normal circumstances. Uploader Agreement, Air Pressure: Factors & Distribution | Atmosphere | Earth | Geography, Absolute Humidity and Its Variation | Atmosphere | Earth | Geography, Oxygen Cycle: Term Paper on Oxygen Cycle | Atmosphere | Geography, Structure of the Earth (With Diagram) | Hindi | Geography, Universe: Essay on Our Universe | Geography, International Tourism in India: Introduction, History, Trends, Opportunities and Future, Forestry: Definition, Branches, Costs, Programme and Conclusion | Geography, Contribution of Russia to World Geography (In Hindi), French Scholars and their Contribution to Geography in Hindi. The layer closest to the surface is the troposphere, which contains over 80% of the atmospheric mass and nearly all the water vapor. This radiation is absorbed by Earth’s surface, then re-radiated back out to space not as visible light, but as longer wavelength infrared radiation. In 20th Century with the help of advanced technical devices, scientists have succeeded in solving major mysteries about atmosphere. Besides creating rain or snow, clouds affect Earth’s climate by reflecting some of the energy coming from the sun, making the planet somewhat cooler. Structure of the atmosphere 1.
Ozone in turn may absorb UV of slightly longer wavelength, which removes one of its oxygen atoms and leaves O2. This sphere starts from 12 to16 kilometers above the Earth surface and extend upto 50 kilometers known for isothermal characteristics also. The ozone layer has been the subject of concern. If u need a hand in making your writing assignments - visit ⇒ www.HelpWriting.net ⇐ for mire detailed information. Most of the weather phenomena take place in Troposphere. In this way, these gases trap some of the escaping heat and increase the overall temperature of the atmosphere. The atmospheric constituents at this level include nitrogen gas, atomic oxygen, nitrogen (O and N), and nitric oxide (NO). Geography, Earth, Atmosphere, Structure of Atmosphere.

Molecules of ozone layer are not stable, their origin and disintegration is a gradual and continuous process. I did and I am more than satisfied. New York: Cambridge University Press, 2006. PSCs play a key role in the development of the ozone hole. Carbon dioxide (CO 2) affects Earth ’ s climate and plays a large support role in the biosphere,... Aerosols. The air parcel is now a convective cloud. Moreover the density of this layer is very low. "Atmosphere, composition and structure If the Sun is like other stars of its type, it may have gone through a phase where it violently ejected material outward toward the planets.

The ionosphere is a region enriched in free electrons and positive ions. From the Greek word tropos, meaning turning, troposphere is the zone of moisture-laden storms between the surface and the stratosphere ab…, Introduction The next most common gas, oxygen (O2), is required for the respiration (breathing) of all animal life on Earth, from humans to bacteria. Teisserence de Bort, S. Petteisun, Sir Napier shaw, Picardy, Kennelly Heaviside, Ferrel etc. A further region, beginning about 500 km above the Earth's surface, is called the exosphere. The troposphere is the lowest layer of our atmosphere. Atmosphere is a gaseous envelop surrounded earth from all side This atmosphere is present by the gravitational attraction on the earth The life prevails on the earth only because of the present atmosphere If there is no atmosphere the earth became barren

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