The ice albedo feedback is a positive one that operates mostly in the high latitudes because that is where the ice is. According to our current climate models, global temperature changes will be amplified in the high latitudes, by a factor of about 2 or 4
over global average warming. Climate change today is much more obvious in high latitudes, as in melting of permafrost in Alaska and Siberia and melting of sea ice in the Arctic, than it is in other places like the tropics, for this reason.
In addition to changing the albedo, the presence or absence of ice on the ocean has a huge effect on the local air temperature. Air over water doesn't get much colder than freezing, 0°C, but air over ice or land can be much colder. As we learned in Chapter 6, water absorbs and emits heat, buffering the extremes of temperature, whereas land and ice do not so much. Sea ice changes may have a lot to do with fast, extreme changes in climate reflected in Greenland ice cores during glacial climate.
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Global warming is a huge problem which will significantly affect every country in the world. Many people all over the world are trying to do whatever they can to help combat the effects of global warming. One of the ways that people can fight global warming is to reduce their dependence on non-renewable energy sources like oil and petroleum based products.