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Predictions of Climate Change


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Predictions of Climate Change is a very old and very young science. Each farmer in the United States is familiar with Poor Richard \ 'Almanac, which forecasts of seasonal rainfall, snowfall and temperature. Although such predictions have some reliability, the weather conditions each day in any given place is still difficult to predict. As meteorologists often said, a butterfly beating its wings in Paris could change the trajectory of the storm in Dallas. But the climate, the average temperature in a given area over many years - is fairly reliable.
the study of written documents, remains glacial, fossils, plants and animals, and ice cores, scientists and historians have gradually been able to reconstruct a picture of the earth \ 'earlier climate. The earth was hot when some of the dinosaurs lived 100 million years ago and much colder 18000 years. Major trends have emerged. During 100000 years, the earth \ 'orbit around the Sun changes shape. During 41000 years, its axis switches between 22.5 and 24 degrees outside the plane of its orbit. During 24000 years, a third cycle, called precession, the planet has a greater \ 'position.

Periodically, these three cycles coincide for the Northern Hemisphere cool enough to start an ice age.

Predictions of Climate Change

Predictions of Climate Change provide climatic trends and the human impact on them in the near future, however, is still something tricky. The most obvious solution is to do what generations of farmers have done, that is to learn from the past. Modern paleo-climatologists call the analog method.

Bubbles in Antarctic ice cores have shown that both levels of greenhouse gases have risen in the past, so that global temperatures. Climatologues use these numbers to predict how global temperatures will increase in coming decades, at the current rate of emissions of greenhouse gases.
Predictions of Climate Change
To determine how global warming will affect the global climate, they examine the past climates where temperatures are equally high. During the Pliocene era, for example, temperatures were 5 degrees to 8 ° F higher than they are today. Testimonials fossils of this period reveals levels of rainfall and vegetation types that can help scientists predict how regional climate will change if temperatures rise by 5 degrees to 8 ° F in the next 100 years.

Predictions of Climate Change
Of course, similar paleo scientists can give a rough, often unreliable idea of global climate change. Critics of global warming theory say the parallel between rising levels of carbon dioxide and higher temperatures is misleading. Bubbles of ice in Antarctica, show that when CO2 levels have risen by 50%, the temperature rose from 20 ° F. If, as shown by the records, CO2 has increased by 25% since the 19th century, then the Earth's temperature should have increased by 10 ° F. However, temperatures have increased by only .5 ° to .9 ° F. In the past, climate change are part of natural resources, the long-term trends for heating and cooling-hardly ideal of a sudden like, man-made warming

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