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Studies of global warming ice cores reveal elements that were present in the Earth's atmosphere but were trapped during the Ice Age era. This was a time in Earth’s history when large sheets of ice covered not only Antarctica but also vast parts of Europe, South and North America as well as some regions in Asia. In the North American parts, the areas included were Canada, US and Greenland.
Ice cores were taken from ice sheets that have remained frozen for thousands of years. They provide important information that tells about global warming as a naturally occurring event of global climate cycles.
However, only a few are aware that global warming is not a present-day phenomenon. Global climate cycle is said to lasts for about 120,000 years as studies show that past cyclical patterns. The cycle commenced with the Ice Age or Full Glacial World that lasted for 100,000 years; after which, the Earth slowly entered the Interglacial Cycle.
What is the Interglacial Cycle?
This is considered as the Earth’s brief break from the full glacial state which is 20,000 years or more of erratic changes in temperatures, lasting for several thousands of years. During the Interglacial Cycle, Earth will finally reach a point in time when its inhabitants will enjoy thousands of years of stable climate conditions. This means, that the atmosphere has enough natural greenhouse gases to keep the temperatures stable.
Yet as human activities increase, Co2 and other greenhouse gases will also increase to cause ice melting and rising of sea water levels. Global climate will again act up and start to warm, until it reaches either a global warming stage or global cooling stage before it assumes another Ice Age or Full Glacial World.
According to paleoclimatologists, the Earth presently has had about 10,000 years of Interglacial Cycle conditions and can expect global warming as part of the cycle. After this, the Earth will go into a process of climate changes in leaps and bounds to a sudden cold snap, until it finally enters another Ice Age.
This information about climate changes may all seem hypothetical since no known records of artifacts have been offered as evidence, except for the ice glaciers, ice sheets, ice shelf and ice mountains found in the Antarctic. A scattering of floating glaciers and snow capped mountains in different regions can also be noted as evidence of this. Nevertheless, this is exactly what paleoclimatology is all about. It gathers evidence about global climate changes, their underlying causes and their subsequent effects.
