The atmosphere The atmosphere is the gaseous layer that surrounds the Earth. It consists of a mixture of gas, called air, and contains solid and liquid particles (aerosols) suspended in quantity and variable composition. Compared to the Earth's radius, the thickness of the atmosphere is very small. About 99 of the mass of the atmosphere comes within the first 30 km in height (0.5 of terrestrial radio). The gases that form the atmosphere can be divided into two groups: Permanent gases: Whose prporci n is almost constant up to heights of about 80-100 kmAre nitrogen, oxygen, noble gases and hydrogen. Gases in varying proportions: are carbon dioxide, water vapor and ozone. Vertical structure of the atmosphere Conventionally, the atmosphere is vertically divided into different layers varies according to how the air temperature gradient. There are three major areas: Homosphere or lower atmosphere It extends from the floor to a height of 80 to 100 km in the composition of air it is almost constant.It is subdivided into: Troposphere: The lower part of the atmosphere and shall edsarrollan meteorological phenomena. It contains approximately 80 of the mass of air. The temperature decreases with height as an average gradient of 6.5 C / km. Part superiorde this region is called the tropopause. Its height is variable (6 to 8 km at the poles and some 16 to 18 km in Ecuador). Stratosphere: In this zone the temperature increases with height (temperature inversion), which translates into great stability for the vertical movements are held back by the temperature inversion. The principals of such energy exchanges are radioactive, and it is in this layer takes place the absorption of ultraviolet radiation by ozone (mostly between 8 and 30 km altitude). The upper limit of the stratosphere is called stratopause and placed into a 50 km high. Mesosphere: In this layer the temperature decreases again with height to about 80 to 90 km altitude where the temperature reaches its lower values (around -90 C) at the mesopause. Heterosfera It starts at a height of 90 to 100km rarefied atmosphere very low density and variable composition due to chemical reactions and diffusion of gases by gravity. The hetersfera includes: Thermosphere: The temperature increases again with altitude, reaching values between 500 and 2000 K at the top, depending on the level of solar activity. The air is very thin and barely particles collide.The upper boundary of the thermosphere is the termopausa whose height varies between 200 and 500 km, depending on solar activity. Metasfera: For heights above 500 km the thermosphere is called the magnetosphere, since the movement of the particles is influenced by Earth's magnetic field.
There are many ways to become a travel journalist, only a few journalists are busy from the beginning of its activities in this department. There is firstly the classical pathway. In the beginning of the journalistic work is done already at the school newspaper, followed by a freelancer in local newspapers, internship at the newspaper and the like. Later, a body may be accepted as a correspondent for the foreign, which naturally involves a lot of traveling. The way for journalists to travel freely. Not everyone needs to go to these classical way, there are career changers, who may have studied an entirely different subject and have reached an internship at a job with the newspaper or a magazine. There are also people who have business or personal travel a lot, they learn the craft of journalism, perhaps during an internship, and then come to the profession of travel journalists. There are, in most cases, no straight line that leads the writer towards the travel journalists and travel editor. They are usuallyAccidents, often it is also true that the letter for travelers, will not necessarily be goal of the professional way. There are a few tips that should be heeded if the path of travel journalists to be taken: Improve your skills can be reviewed and extended, in which a placement is carried out in the field of journalism. Basic skills are very good buy for daily and local newspapers. Here you can be first carried out research and written smaller contributions. Anyone who has worked as a freelancer for many newspapers and magazines as possible and gaining experience and has the opportunity to make contacts. Anyone who wants to apply first for a travel report, which should not be happy like all the editors with his design. Many of these editors are truly overwhelmed by the reports of journalists and the free amateur journalists. There is a risk that the painstakingly written work ends up in the trash. This should be the writer come up with something, such asan unusual approach, or a very special destination, about which he writes. Author of the article: Thomas Busch 22457 Hamburg