Thursday, February 4, 2010

A Brief History of the Earth's climate

In this article we study climate change also will explore some of the major trends. As far as we know that the planet is unique in that our solar system, which is one atmosphere and oceans of water is only one. The heat and moisture across the world so that life in the streams is essentially larger. These currents create a season. Weather patterns in a particular location with time this season and is slowly changing climate forcing new conditions conducive to life. However, recent changes in the rate of increase.
In 1890 the Swedish chemist Svante Arrhenius claimed that the last ice age atmosphere as volcanic gases such as carbon dioxide is generated by eruptions pump. These gases keep the heat low so they will have to pacify the earth. So what if he surprisingly strong industrial activities like coal burning as a fuel will produce more of these gases. It really is a factor that global temperature changes associated with industrialization and the discovery of fuel use. The basic principles of climate change climate for a very clear exposoition DK Please read Guide Change 2008.
The most important greenhouse gases, water vapor, carbon dioxide, methane, nitrous oxide and ozone are. Like all gases as they exist in groups of atoms called molecules. Carbon dioxide to a molecule composed of one carbon atom and two oxygen atoms is. A methane molecule is one carbon atom and four hydrogen atoms. Not all greenhouse gases including carbon such as nitrous oxide. However, the main greenhouse gases carbon dioxide in the atmosphere is one of the most important. Such as nitrous oxide and methane in the other greenhouse gases per molecule absorb very little energy, but it's too much.
Carbon dioxide in the air by U.S. scientist Charles Keeling's measurements shows its concentration has increased every year since 1958. A brief description of it for our own carbon cycle brings. Basically being constantly absorbing carbon released by living and working. Plants and other carbon dioxide absorption and carbon photosynthesizers using some of the tissue production. Carbon as carbon dioxide or methane released when the plant is dying and decay. If animals use some of the plants in the carbon build your own tissue, but also eat dead end. Meanwhile, both plants and animals release carbon dioxide when breathing by the Chinese turn them into energy. In fact, greenhouse plants and marine plankton carbon include intelligent impact is one of the main Czech, and as much carbon dioxide they absorbed there is more.
There are number of checks and balances that work for climate stability. These can be either negative or positive feedbacks are through. Some natural processes oppose change. For example, when invisible water vapor in the air as the sun the sea's surface water evaporates and rises warms. As it rises, and cool it down is it forms clouds that shadow the ocean. Construction stops and the clouds have finally evaporation sunlight can warm the ocean again. This is an example of negative feedback. When ice forms and snow white surface like a mirror is working. The solar energy so that less heat is absorbed by land and shows more ice forms. Called a positive feedback effect and the albedo changes that encouraged protests rather it is an example.
British scientist James theory that the plume where things in the interest of their own environment, climate regulation and is known for chemistry. The Web is more than long-term negative feedbacks ensure that life continues despite the catastrophes that cause widespread extinctions. Gaia theory is named after, Greek goddess of Earth.
Due to natural climate change
Human impact on global climate change, we consider two natural climate change some time ago before some of the factors examined. Climate change on earth has happened many times before humans came to the scene. These changes are due to natural cycles that Earth's orbit around the Sun changes in the level of solar radiation, affecting and devastating natural events such as large volcanic eruptions were from. Some of these changes in response to dramatic events have begun to affect growth. We have examples of the many ice ages that Earth at least partially because of the class has passed through cycles to know. Now we have an ice age that peaked 20,000 years ago in a hot phase are living. Rocks, fossils and other sources to see more in evidence now to show how Earth's average temperature since it was formed 4600 million years ago has changed. Geological time is highest during hot, but during the ice age with the former Cambrian and Palaeozoic era. Was a warm period of the Mesozoic age of dinosaurs, but the temperature fell during the Cenozoic era, until they reached the current ice age coldest phases. Even we in the Earth's orbit Earth, Axis flow, sunspots and plages, continental drift, ice age, volcanic eruptions and the Mini at full discussion of the effects of natural climate change should consider changes in addition to tilt. Around the Northern Hemisphere from 1850 to 1300s, for example a small ice age in the middle of the 15th century faced reached its coldest point. About this period and Henry Kamen wrote the book of history is excellent and works Braudel link between climate and show short-term events. Europe's crop failed and people starving and freezing winters bitterly cold early 1600s such as the work of the Dutch artist Hendrick Avercamp the period depicted in many paintings made landscape. Because of this special little ice age is still not understood, but clearly results from volcanic activity is possible.
Human impact
Human impact on global climate change now we move on. In the last century average global air temperature increase of approximately 0.8 ° C measured at ground level. This year from 20,000 in the rate of warming represents a relatively rapid improvement since the last ice age, only 4 degrees Celsius temperature has increased man's advances fuel has been used mostly when the peak water Releases carbon dioxide. This has increased the concentration of carbon dioxide in the air and it matches closely growth in global air temperature, it is very possible that our modern energy has accelerated global warming is being caused as the appetite for life. We know from ice core samples that carbon dioxide levels in the 1700s to nearly 280 million parts of air was. It is now 380 ppm. Now we release carbon dioxide into the atmosphere in the way humans are increasing the amount some consider. We two major aspects - forest burning and fossil fuel use will. We note this with a section on the production of other greenhouse gases will end.
Water Forest
The most basic of all fuel for thousands of years people burn wood that has been. Human population growth in the large quantity of wood burned and a vast forest at the same time are being felled for cultivation has increased on, cattle and road construction - is that all the forest trees absorb carbon released contributes to climate change through in their lifetime. Brazil has lost the forest more than 423.000 square kilometers. Indonesia has lost about 300,000 square kilometers. It is true that the natural carbon cycle are part of the wildfires and that they will soon release carbon dioxide absorbed by young trees, but if a forest, felled and burned for permission does not regrow all the carbon carbon dioxide increases In greenhouse effect has changed.
Fossil fuels
Coal industry as fuel in modern growth as well steamships and railway 1800s. In the 20th century, oil and natural gas fuel for road vehicles and aircraft has been developed. World's first oil wells in Baku Caspian shore oil industry in 1847 when oil really perfected the 20th used as fuel for cars can be left on Century drowned. All these processes carbon rich fossil created by that year, millions of long dead organisms are fuel. He is being burned more quickly than they were thus formed and atmospheric greenhouse effect of carbon release back linking. Different amounts of different fossil fuels releases carbon dioxide. Worst coal, oil gas after. Such coal soot and sulfur dioxide, which along with water vapor to form smog and acid rain as may include other pollutants. For a more detailed discussion Harding Please read and work on Starzynska fuel types compared to 2008.
Other aspects of modern life
Add the problem of other aspects of modern life. Methane, nitrous oxide and (CFCs) chlorofluorocarbons than carbon dioxide is released in small amounts but they have a serious impact, because they are more powerful. For example, one molecule of methane has the same effect as 25 molecules of carbon dioxide. We look at many aspects of modern life that the problem of greenhouse gases and global climate change links. Some are obvious, some less well known. First there is the landfill problem. Massive amounts of waste production in developing countries - a much too much carbon dioxide and hazardous gases buried where the bacteria down the production of methane - a very powerful greenhouse gas is broken as we have seen progress from burned . So global warming can increase the buried rubbish. Perhaps less well known issue concerns production of cement. Cement limestone has been a process that the rock is calcium oxide and carbon dioxide. Uses a lot of fuel for heating and Pulverizing. Is it too heavy cement uses is also a transportation fuel. For every bag of cement of cement produced in the total carbon dioxide released in large quantities. Harding and the World Climate Change Starzynska construction of cement and construction industries, the impact will release a more detailed study. Nitrous oxide is also released third artificial fertilizers and carbon dioxide a greenhouse gas 300 times more powerful! Can actually create problems in food production. Our taste for meat animals encourage cows still a lot of animal husbandry produce methane. Relatively high levels of methane in rice production also increased.
So water, deforestation, fossil fuels, cement production, transport, intensive farming, excessive use of fertilizers used, and the CFC gases accelerate human greenhouse effect. We now head of climate change on some of the results for a test turn. We broadly in these themes such as heatwaves and droughts can split, ice melting, warming oceans, and the impact on wildlife. Many climate change scientists evidence of temperature increase is much more clear as heatwaves, lakes, deserts, drought, drought and wildfires can shrink. Very high temperatures are becoming more common. These are not always recorded the highest temperature, but such as the August 2003 European heatwave of summer time are sustained extraordinary. Irrigation projects are making worst problems of shrinking lakes. The dramatic shrinking of Lake Chad to a classic example - still in their original size with one twentieth. Is happening in the desert. Saharan Africa and the Gobi desert, both are increasing with the Sahel region most affected. Many people who live on the edge of dry desert to rely on seasonal rains provide water for crops and livestock growing. If the rains fail due to climate change disaster is going on in Ethiopia as 2006. Wildfires also Australia, California and other areas become more common as the country is drier - in parts of Amazonia there wildfires - one for wildfires are becoming common as unused area. Just as the dramatic events of the world is melting ice in polar regions. Arctic pack ice and giant Antarctic ice shelves have been shrinking and retreating glaciers are falling everywhere on the mountain. High temperatures are melting ice at polar edge that is below the ground, tundra landscape change. Since 1979, about the size of summer Arctic ice cover has diminished by about 15 million square kilometers. In the 1990s, its thickness also decreased by 1m. We each heat and snow melt Berg faster than 3km away along with structures break thick ice sheets on Greenland see other effects. This event will cause an increase in sea level. About one quarter of the country in the northern hemisphere is so cold that it is permanently stored beneath the surface.

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