These images, derived from passive microwave satellite data, depict the most recent daily sea ice conditions. Along with current and median total extent, the daily extent graph also includes the extent during 2007, the year of the record low minimum extent (dashed green line). Note that during the transition across the calendar year, data from 2006 or 2008 is included for continuity of the plot with the 2007 record year. This comparison shows the substantial recent change observed in Northern Hemisphere sea ice.
NSCID press release:
What the researchers found was a scientific story more in line with what people were witnessing on the ground. Weather along the Arctic latitudes was behaving more unpredictably than in other parts of the world. “That’s an incredibly important parameter to care about, incredibly important,” said Weatherhead. “The way I try to describe it to some people, if we get an inch of rain out at my house in the month of July, I don’t need to turn on the sprinklers. But if we get an inch of rain on July 1, and no rain after that, my lawn is dead.”