The above image illustrates the extent of March 2013 sea ice over the Arctic. The white area represents nearly 6 million square miles of ice coverage. The area covered is roughly 274,000 miles less than the 1979-2000 average extent, but above record low March ice coverage back in 2006. Melting sea ice is just one reason for a rise in world sea level. NASA research indicates average world sea level has risen 7 inches since 1900 and has been accelerating in recent decades. The link below will connect you to a NASA website. Please take a few minutes to search the website and read any number of interesting articles.
KGW Meteorologist Rod Hill