Archive for August, 2009
Principles of greenhouse effect
Greenhouse Principles of The Transition Companies By: Henry White
The emission of infrared radiation by the atmosphere results in the warming up of the surface of a planet. This process is called the greenhouse effect. In other words, certain gases in the atmosphere trap the solar energy so that the earth experiences a considerable rise in temperature. These gases include carbon dioxide, water vapor, methane, nitrous oxide etc. and they are known as green house gases. The absence of these gases will make the heat escape back into the space which will make life on earth impossible. Green houses make use of this mechanism.
Greenhouses are used to grow plants, especially in the winter. Most green houses resemble a small glass house. Here, it is the glass panel that plays the role of the greenhouse gases. The glass panels of a greenhouse allows the entrance of solar energy in the form of heat and light, but won’t let it escape. This raises the temperature inside the glass house and provides suitable atmosphere for the growth of the plants inside.
In the case of atmosphere, our earth receives energy from the sun. Once absorbed, this energy is sent back to the atmosphere. While doing so, a major portion of the energy gets absorbed by the greenhouse gases and warms up our planet. Green house effect, if enhanced considerably too can deny existence as it would heat up the earth than usual.
August 13 2009 | Greenhouse Principles of The Transition Companies | Comments Off
The Greenhouse Effect and Global Warming
The Transition Companies and Global Warming By Raguraman Gurusamy.
The gases that absorb radiation are called greenhouse gases. The greenhouse gases include the gases such as carbon dioxide, methane, nitrous oxide, ozone, or water vapor that contribute to the warming of the atmosphere of the Earth by reflecting radiation from the surface of the Earth. They keep the Earth warm. They naturally exist in the atmosphere, heating the atmosphere of the Earth by trapping energy that originally comes from the Sun. Due to this, the temperature of the Earth increases. This is known as the greenhouse effect. The greenhouse gases play the vital role in raising the temperature of the Earth. If the greenhouse gases are not there on the surface of the Earth, the Earth would be as cold as the surface of the Moon. The temperature would be around -18 degree Celsius. Actually, the characteristic surface temperature of the Earth is around 15 degree Celsius. It is now worried that the warming effects are being lamentably increased, inducing climate changes and melting of polar icecaps.
All the countries are keenly watching the warming effect. Almost all the countries are taking effort to measure the climatic changes taking places in the globe; however, the measurement is clearly showing that the global climate is keep on changing. In the past 100 years, the atmosphere of the Earth has warmed up by about half a degree Celsius. In addition, during this time human beings have also been released extra greenhouse gases. These gases have been produced as a result of burning the fossil fuels like coal, gas, and oil.
It is evident that the artificial emissions of greenhouse gases, by the activity of increased use of fossil fuels, are accountable for some of the warming of the global climate during the 20th century. The additional greenhouse gases present in the atmosphere absorb more energy and consequently increase the greenhouse effect. Due to this, the global temperature can raise further.
Besides by burning the fossil fuels, the greenhouse gases have also produced by the exhausts of motor vehicles. The destruction of rain forests is also responsible for the release of carbon dioxide, which in turn causes global warming. There are also many other natural ways by which the climate can be changed. The gases released from active volcanoes mix with the water vapor present in the air to create aerosols, and cool the atmosphere. The changes in the energy of the Sun and the flow of the ocean also affect the climate of the Earth. If the Earth keeps on to warm as predicted by the climate models, the temperature of the surface of the Earth may be three degree Celsius warmer than the current temperature by the year 2100. Due to this sudden change in the temperature, many ecosystems would get affected; which in turn affects many species of animals and plants.
The Transition Companies and Global Warming
August 13 2009 | The Transition Companies and Global Warming | Comments Off
The Effect of Green House Gases
The Transition Companies Green House Gases by Eleanor B. Jhonsons.
Earth, the only planet in our solar system or as far as evidence indicates the only planet in the whole Universe that supports life, was not like as we see it now since its beginning. Earth has been able to give a safe home to life because of its unique place in the solar system; it’s neither too close to the Sun nor too far away. As Earth is situated away from the Sun preventing it from being a hell of a warm place, there was the possibility that it may have been freezing cold for life to form and flourish here. But thanks to the greenhouse gases present in Earth’s atmosphere that play their role in keeping it warm enough.
Greenhouse gases are those gases residing in Earth’s atmosphere that absorb and emit radiation and thus, keep Earth warmer. The ‘Greenhouse Effect’ is the natural process through which these atmospheric constituents absorb sunlight. Sun, the only star in our Solar System, emits light that reaches Earth’s atmosphere. The greenhouse gases in the atmosphere absorb the long wave radiation emitted by Sun which warms the atmosphere and these long wave radiations are emitted both upward and downward; the downward emission of radiation by atmosphere is called the ‘Greenhouse Effect’.
The greenhouse gases present in Earth’s atmosphere are water vapor, carbon dioxide, methane and ozone. Water vapor is the most abundant gas and plays the lead role in warming earth causing 36-70% of ‘greenhouse effect’. Carbon dioxide contributes 9-26%, methane 4-9% while ozone’s share is about 3-7%. Some of the other greenhouse gases present in much smaller quantities are sulfur hexafluoride, hydro fluorocarbons, chlorofluorocarbons, per fluorocarbons and nitrous oxide. Two of the major components of Earth’s atmosphere, oxygen and nitrogen are thankfully not greenhouse gases otherwise earth’s atmosphere would have been far warmer than it is now.
Although, these greenhouse gases have been playing a major role in providing life on Earth the perfect temperature to survive, since the Industrial Revolution human activities have caused increase in quantity of green house gases in the atmosphere. More greenhouse gases will trap more and more heat from Sun giving rise to the Global Warming phenomenon. Rising temperatures can be potentially hazardous to all kinds of life forms on Earth and a major cause for rapid melting of glaciers which in turn will cause sea level to rise submerging many coastlines worldwide. Although, environmentalists are forcing the issue and many Governments are taking steps in the right direction, it is not the greenhouse gases but human intervention in nature that is to be blamed.
Posted by The Transition Companies
The Transition Companies Green House Gases
August 12 2009 | The Transition Companies | Comments Off
Climate Change from The Transition Companies Author: David
Now-a-days we listen Climate Change more often than before. Climate change is a global phenomenon and the term “Climate Change” is indeed a straightforward expression for such a complex subject. In fact, climate change has more than we can comprehend from this phrase and that is why it is quite essential to go at defining climate change in today’s scenario. In the present glossary of researchers and scientists, climate modification as a term is no longer in use and effect. The reason behind this is that we have come to realize the effect of the changes we make to our environment will eventually increase the temperature in many parts of the world, but at the same time will also be decrease in temperature for few parts of the planet. This however, creates a general imbalance in the climate of the world which in turn leads us to the phrase, “Climate Change.”
While wondering the effects of the climate change, the things you know of as climate modification is actually referred to as global a global phenomenon of climate change. However, with all the details and statistics we have in hand at present, we can definitely conclude that the world is unquestionably warming with the temperatures rising like never before. Climate change is a global problem with many natural disasters started taking shape; the general awareness of this factor is really low. For the better understanding of the issues associated with the climate change, we require a simple definition for climate change in relation to the warming of the planet. And this definition needs to be the one that brings us the essence of this problem without compromising the simplicities. However, the easiest and most precise definition is that climate change is the effect greenhouse gases have on the earth’s overall climate. Greenhouse gases include carbon dioxide and methane, but are not limited to these two.
While learning more about climate change, we need to understand few important facts associated with it. The first fact is that climate change is both a natural phenomena and one catalyzed by us. For instance, greenhouse gases are a natural part of the biosphere and would exist if man did not. In fact, these gases are a vital component to the existence of life on this planet. It is due to the existence of the greenhouse gases, the temperature on planet earth does not average zero degrees! These naturally occurring gases help to keep the temperature at a desirable 59 degrees. But, the climate change, which is due to the greenhouse gases, is not indeed natural. In fact, the problem we are facing is the amount of greenhouse gases in the atmosphere. These gases act as thermal blankets for the atmosphere. The more gas in the atmosphere, the thicker the blanket and the less heat escapes from earth. In the last 80years, we have been releasing this gases into our atmosphere and thus helping them to form a blanket.
Posted by Transition Companies
August 11 2009 | Climate Change from The Transition Companies | Comments Off
The Impact of Climate Change from The Transition Companies By: Paul Hata
The planet was once protected with ancient forests; it has been a shelter to almost 50% of all the animals and plants confined in lands. Also, the worldwide population depends on them for survival.
The most diverse ecological units exist in these forests, and they serve essential help to our planet especially in matters regulating the climate. This is the very reason why deforestation and climate changes go hand in hand. Where deforestation is, climate alteration always follows.
Unfortunately, the forests that should be the world’s shield to the growing global warming are now under threat; almost 80% of the vast land areas all over the earth have been wiped out. Everything went by in a matter of 30 years, and the foundation is due to human doings such as destructive logging and agricultural land transformations. The fact that deforestation is the second cause to climate change should alert every human being in order to put to a stop to anything that may interrupt our normal ecosystem. If no moves would be done, further retaliation of nature would surely come to pass.
Major Carbon Storehouses
It is increasingly clear that our ancient forests play a crucial role in the regulation of world climate through carbon storage and water recycle back into the atmosphere. It is a fact that the green areas of the earth are regulators of climate, and destruction of that area means contributing to a climate change. Eighteen percent of all carbon emissions come from deforestation. Instead of the forest protecting us from disastrous effects, man made phenomenon make them our source of devastation instead.
Full grown forests are the greatest keepers of carbon dioxide. Other “keepers” include: the earth soil, the plant life, and the smallest and biggest trees. Some popular forests such that of Congo represent one of the planet’s enormous carbon sources on land, and destruction of it may cause more greenhouse gas to get trapped in the atmosphere.
The carbon is emitted from the green life through logging, burning and rotting. If these illegal activities happen frequently and continuously in all parts of the world, then the levels of carbon trapped in our environment is exceedingly augmented. Climate changes happen abruptly and changes in the world environment would slowly take place.
Deforestation and Its Effect On Climate Change
When deforestation is made, climate changes begin to progress over a period of time. The gradual modification in climate show insignificant numbers, but it affects the earth in great ways. The following are some examples of global changes after massive deforestation: temperature of global surface has increased to 1F, precipitation events happen around the world and in extreme cases, snow capped mountains have decreased in cover, sea levels have risen, and thawing of permafrost has slowly been happening over the years.
It is said that in a matter of 50 decades, the world may be in an irreversible state already. If things could be prevented now, then it is highly suggested that every human take part in preserving the world.
Posted by The Transition Companies
August 10 2009 | The Impact of Climate Change from The Transition Companies | Comments Off