After a record summer of arctic melting, leading scientists are now saying that the North Pole could be free of ice by 2013. I can't say it better than the Guardian, so I'm not going to try:
Shout out to Gina Johnson for sharing this scary, scary story with us.This startling loss of Arctic sea ice has major meteorological, environmental and ecological implications. The region acts like a giant refrigerator that has a strong effect on the northern hemisphere's meteorology. Without its cooling influence, weather patterns will be badly disrupted, including storms set to sweep over Britain.
At the same time, creatures such as polar bears and seals - which use sea ice for hunting and resting - face major threats. Similarly, coastlines will no longer be insulated by ice from wave damage and will suffer erosion, as is already happening in Alaska.
Other environmental changes are likely to follow. Without sea ice to bolster them, land ice - including glaciers - could topple into the ocean and raise global sea levels, threatening many low-lying areas, including Bangladesh and scores of Pacific islands. In addition, the disappearance of reflective ice over the Arctic means that solar radiation would no longer be bounced back into space, thus heating the planet even further.