Story Comments
Posted by: greenmac 11 months, 3 weeks ago
This page is a permanent archive of the comment below and its replies.
To view this comment in the context of the full discussion for the story, use this link.
-
100%
greenmac11 months, 3 weeks ago
This comment is below the standard viewing threshold View It ยป
"While very warm temperatures were also seen in the Arctic in the 1930s, the loss of Arctic sea ice observed in the past 20 years has no precedent in the historical record. For example, the fabled Northwest Passage opened in 2007, an event that has not occurred since at least 1497, and probably for a much longer span of time. Between 1979 (the year satellite imagery of the North Pole first became available) and 2006, Arctic sea ice extent shrunk by about 10% in winter (4% per decade) and 20% in summer (8% per decade). The loss of sea ice, when plotted on a graph (Figure 3), roughly followed a straight line over time. There were a few noisy ups and downs, reflecting colder and warmer years. A trend that approximately follows a straight line is called a "linear" trend. A continued linear summertime 8% per decade loss of sea ice would leave the summertime Arctic Ocean ice-free by 2100. The ocean would still partially freeze in winter, with about 50% of the ocean covered with ice."
Reply
loading ...
People Who Liked This Comment (1)
FrauBlucherPeople Who Didn't Like This Comment (0)
No one voted this comment negatively.
Post Reply
You are not signed in to Propeller.com. Please sign in to post a reply.