Oceans and Climate

Category: Water

Primary Ocean consisted of water with a pronounced acid reaction. The water was a mixture of dilute acids with a predominance of carbonic acid and high content of silicic acid. As the binding of metals and salts, the acidity of water in the ocean decreased. Thus, neither on land nor in the seas and oceans, while fresh water was not.

With regard to land, then in the initial period it occupied most of the Earth's surface than it is. It was a bare soil, which was formed by volcanic deposits - basalts, tuffs, volcanic bombs. At that time, on land and at sea breathed fire chain of volcanoes. Many areas of the Earth's surface was littered with meteor craters. The surface of the land was covered by ocean ridges, rift valleys, which broke off - failures with steep walls. At the bottom of these failures were practically no crust. From these places flowed hot lava, fountains of hot mineral geysers, steaming gas emissions. These giant cracks once encircled the entire globe. They divided the crust into several giant slabs. These plates are moved, crept at each other and parted. In cases where one plate was moving under the other, formed by mountain uplift. The lower plate was immersed in the subsoil and partially melted again. In these places to create more powerful and lighter continental crust.

Such a primary climate system (atmosphere - ocean - land - the cryosphere) lasted approximately one billion years. It has changed significantly after the life on Earth evolved. In Greenland, were found samples of quartzite, whose age was 3.8 billion years. This is the oldest of the rocks found on Earth. Studies have shown that in the finest environments quartzite of which are composed of ancient rocks, are spherical and elongated cavities. These voids were found fragments of walls, which had obvious signs of belonging to a single-celled organisms. Hence, life on Earth began to develop long before that. By the time (3.8 billion years ago) she has already managed to pass dokletochnogo stage of development, as well as the transition from organic matter to a living creature.

What was the climate on Earth in a very long time - Archaean period? Analysis of the deposits of this period testifies to the abundance of water at this time. The Earth's atmosphere was aggressive rehabilitation. Water of the seas was characterized by high acidity. It was the warmest period on the Earth. Atmospheric gas contained a large amount of carbon dioxide and other impurities, which create the greenhouse effect. Was formed powerful clouds, since the high temperature intensive seawater evaporated. Clouds covered the light, and the Earth's surface beneath the clouds dim. Add to this that almost continuously thundering storm, and were abundant acid rain and showers. To some extent this is the vista that awaits us if emissions into the atmosphere to shake humanity's heat balance and begin the real process of warming on Earth. If we add to the damaging ultraviolet radiation to penetrate the Earth's surface (because the ozone layer would be destroyed), then the tragedy of what is going to reach its climax: not only will the irreversible climate change, but will cease to exist and the Biosphere as such. But back to the description of climate change in the past. Actually, we do of the history of climate in order to find the answer to the question-what is to come from changes in atmospheric composition, and hence the energy balance that must inevitably lead to a change in the average surface temperature of the Earth.

The Earth's atmosphere began to change in the Archean era since the advent of microscopic blue-green algae, which carried out the photosynthesis of organic substances from carbon dioxide and water. It stood out free oxygen. All this was possible under the action of sunlight. Ultraviolet radiation of the sun in our time is delayed atmosphere. With this composition of the atmosphere, it passed easily to the earth's surface. Thus the first organisms were able to save his life only in the water at this depth, where ultraviolet does not penetrate. As is known, ozone, ultraviolet radiation delays the sun and keeps us all living life. After destroying the ozone layer, we risk life to drive deep into the waters of the oceans.