As well as reflecting the sun, the ocean, Arctic and its ice has several uses in terms of climate change. If Arctic ice melts, it may disrupt the 'heat engine' that is our ocean. The temperature of the ocean largely contributes to the world's weather. If there is less sea ice, it will alter how cold the sea is and, consequently, atmospheric and ocean circulation which, in turn, could cause changes in air pressure and lead to more extreme types of weather such as vigorous storms and even hurricanes. The sea ice also helps to keep the Arctic cold, so if it was to disappear due to global warming, the Arctic's environment would rapidly become warmer. Of course, the melting of ice also increases the likelihood of flooding which, over time, could see low-land areas, especially small archipegelos, destroyed and lost to the ocean. If climate change continues at the same rate it is currently, it's likely that the world could be a very different place in just hundreds of years, as opposed to the thousands those that do not believe in the changes, or the speed of the change, think.
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