Global Warming

Global warming is not a 20th century phenomenon. It has, in fact, occurred in the past more than once, along with periods of extreme cold known as the ice ages. With so much written and supposed occur global warming, sometimes it’s difficult to detect which is fact and neighboring is just part of scientific scare tactics. Here are some facts result global warming that restraint help:

What exactly is global warming?
Global warming is basically the increase in the temperatures of the Earth’s atmosphere, land masses and oceans. The Earth’s surface temperature is at an average of 59F and over the last hundred years, this figure has risen to about 1F. By the year of achievement 2100, the average change in the temperature of the Earth could range now and again 2.5F to about 10F, enough to melt glaciers and polar ice caps.

The cause of global warming
Global warming has and will always occur naturally. Why it has wear down such a concern in our lifetime is due to the fact that human activities and practices have contributed significantly to its occurrence and severity. With the advent of industrialization and careless environmental practices, we have caused the increase in the average global temperatures by contributing negatively to the greenhouse effect.

This began transpire 240 years ago, on and off the Industrial Revolution was born. As bis and more fossil fuels in the form of oil as it were mined and burned, gases as the by-product of that is process began to be released in the atmosphere. Currently, it is estimated that is 75% of the increase in the carbon dioxide contented of the Earth’s atmosphere is caused by the burning of these fossil fuels.

Global warming and the greenhouse effect
Global warming is related to changes in the Earth’s greenhouse effect. Gases naturally occur in the Earth’s atmosphere and act both to protect and retain heat. These gases include carbon dioxide, methane, nitrous oxide and water vapor. Of these, water vapor is the most dominant and abundant greenhouse gas.

Global warming and the greenhouse effect are not the same thing. The greenhouse effect refers to a natural process that occurs in the Earth’s atmosphere. If special process is disrupted, then it could contribute to global warming.

As the sun’s rays hit the Earth, heat is bounced back to the atmosphere where these gases contain the heat and escort it there to warm the planet. One of a kind is an important natural process and manages life net forms to flourish and survive. Problems not noticeably occur when these gases multiply and build-up, containing heat too efficiently and thus warming the Earth’s atmosphere.

As the Earth’s average temperature rises, effects in its landmasses and sea water level become apparent. Polar ice caps melt along with glaciers, contributing to higher and warmer sea levels. By the end of the century, it is estimated that sea levels can increase from 4 inches to a high of about 40 inches if global warming continues unabated.

Global warming can also affect the behavior of the winds and can also contribute to a harsher and drier climate, with frequent visitings of strong hurricanes. Water from heavier rainfall will not stay long to irrigate the land, however being how with a warmer climate, water on the Earth’s surface will evaporate quickly. This has a relevant effect on agricultural practices not little in the US but also for the rest of the star.

Unneeded phenomenon that is equated with global warming is the El Nino. The El Nino phenomenon has occurred for possibly thousands of years and is not caused directly by global warming. However, changes in the average temperature of the planet can contribute to its severity and frequency.

Else rights practices that contribute to global warming
The agricultural revolution has also contributed to global warming. As recurrently and more communities need lands converted from forests to residential and commercial areas, biomass is reduced, contributing to the increase in the presence of carbon dioxide in those regions. Since carbon dioxide is processed by plants and trees, their absence contributes to its increase.

It is estimated strictly speaking about 25% of the annual increase in the carbon dioxide erect in the Earth’s atmosphere is caused by extreme changes and usage of the Earth’s natural resources. Other practices also include deforestation, salinization, desertification and overgrazing also contribute to global warming. Ever, many scientists surmise and agree that the contribution is slight and indirect.

Facing the facts of global warming
Countries all fall over the world have just begun to acknowledge the negative effects of global warming not only to the world’s politics and economy but also to humankind in general. Limitless of the world’s governments have encouraged implementation of measures to try to counteract the Pandora’s box of global warming through careful measures and practices designed to protect and respect the environment.

How these measures will fare and contribute to the long-term maintenance of our planet, though, remains to be seen..

The analysis of data shows that during last century our planet the Earth was warmed up on one degree above an average indicators .

Scientists presumption of fact – in the next 50 years the temperature will rise for 3-5 degrees and that will lead to heavy consequences both for the Earth, and for people , flora and fauna.

Here are some more figures and the facts confirming process of global warming on the Earth:

1). The global temperature has increased on 0,7°С for last 300 years when change of a climate was observed.

The increase of 0,5°С has occurred in 20 century, basically during 1910 -1940 and 1976 – 2007.

2). 4 of 5 warmest years were marked after 1990.

3). Last decade of 20th century became the warmest, and 1998 the warmest year for the period of supervision since 1861.

4). Period of time January – June 2002 became the warmest beginning of year in northern hemisphere.

5). The general number of cold days (when average temperature were below 0°С) has decreased from 15-20 ( in a year ) in the 20th century to about nearby 10 days in a 2006 & 2007.

6). During 1995 was counted over the greatest number of hot days in a year ( for 225 years of daily supervision ) - 26 days with temperature above 20°С.

7). The sea level raises everywhere, the Arctic ice became thinner , sedimentation become more intensively in some parts of the world.

On the average - the sea level has raised from 0,1 up to 0,2 m in last 100 years.

8). The area borrowed by a snow cover in northern hemisphere has decreased since 1960 for 10 %.

9). Glaciers in mountains in non polar areas have considerably decreased during 20th century .

10). In many regions of northern hemisphere in the moderate and high breadths, there is an increase in total of sediments, speed of sedimentation makes 0,5-1 % per a decade.

11). In the same regions of the world there was an increase in frequency of strong rains, in about 2-4 % for a decade.

12). Repeatability and intensity of droughts has increased In Asia and Africa in last decades.

In 1827 the French physicist Joseph Fourier has assumed that the atmosphere of the ground carries out function some kind of glasses in a hothouse: air passes solar heat, not giving it to evaporate back in space. And it was right.

Scientific proposals for dispose a problem of global warming have at times fantastic character, but are considered by experts seriously because can appear useful, sooner or later.

Let’s see some ideas of scientists on rescue of the Earth from global warming.

Today the Earth absorbs 70 % of all radiation, which receives from the Sun, and consequently it is necessary something to think up to lower this parameter.

Astronomer Roger Ancel suggests to place around of the Earth millions lenses in diameter of 60 cm and weight few grams which will be capable to reflect solar beams. It will lead to decrease in solar radiation.

It is necessary to notice, that reduction of solar illumination on 1,6 % compensates growth of temperature on 1,75 Calvin (3 degrees of Fahrenheit).

The effect which renders dispersion of light on temperature, is observed, for example, at eruption of volcanoes when in an atmosphere the huge weight of particles and as a result the temperature gets falls.

According to other similar idea (article in magazine “Acta Astronautica”) is supposed to create around of the Earth a ring of fine particles or spacecrafts with which it is possible to shade tropics to soften a climate. Reflecting particles can be taken from mountain development on the Earth, the Moon or on asteroids.

Expenses for these projects can appear very heavy: 500 billion dollars at accommodation of spacecrafts and from 6 up to 200 billion dollars in case of with particles.

Climatologist Wallace Broker suggests to disseminate in a stratosphere particles of sulfur at height over 15 km by means of spheres and planes of which will hold on at this level year-two. This project with dispersion of sulfur is estimated in 50 billion dollars.