How Pocket Refuges helped in the Transition between Glacial and Interglacial and How They Will Help Us Understand Future Transitions Due to Global War

A huge glacier dominated Canada and the northern part of the United States during the last glacial age. Plants and animals found in these areas will be transferred to areas without ice for a long time and will be decided on their own until the ice is withdrawn. These areas are known as glacier shelters (Dyke, Moore et al., 2003). A shelter is an isolated place inhabited by one or more isolated populations. Such areas are all over the world and contain a lot of biodiversity.

During the past five million years, the temperature of the earth has changed during the cold glacial period. The glacial period is about 100,000 years, while the warm period is about 10,000 years for the glacial period. Now, we are in the interglacial period. The earth was cold 20,000 years ago. It began warming up about 15000 years ago which is the end of the last glacial age. During the past 10,000 years, the climate was warm and the fluctuations were small, but during the past 1000 years the climate has not changed, the annual temperature fluctuation is small. During the past century, the world's temperature has risen rapidly. This is called global warming, and between 1900 and 2000, the average temperature rose sharply to 0.7 ° C. The temperature in the last century is rising very fast

The Ice Age is a colder global temperature characterized by repeated glacial expansion repeatedly on the Earth's surface. These periods can last hundreds of millions of years and regularly during the warm period with at least one large ice sheet dotted with glacial intervals. Because the ice sheets of Antarctica and Greenland remain intact despite mild temperatures, the Earth is now in the Ice Age. These overall cooling periods start with a temperature drop that prevents some areas from melting completely. The bottom layer turns into ice, and as the weight of the snow slowly moves forward, the ice becomes glacier. At the same time as the sea level falls, snow and ice cover the earth's water, promote the growth of these ice sheets, and form a periodic pattern.