Tuesday, 11 August 2015

Arctic Ice Melt IS a natural cycle

Another debunking of one of UNSkeptical UNScience -SS's- so-called "Myths." This time debunking their #29

"Arctic ice
melt is a natural cycle"
Thick arctic sea ice is undergoing a rapid retreat.

SS say that
Satellite measurements of Arctic sea ice extent reveal a rapid decline over the past 30 years, particularly at the end of each year's annual melt season.  The downward trend and the increasing difference between seasons are in keeping with predictions of the effects of global warming
and show this graph from NSIDC:
 SS Graph ends in 2009 with an upturn

As Steve Goddard tweeted today(11/8/2015):

 Anthony Cox writes:

Arctic ice melt is a natural cycle.

Sure is. See items 44, 95.

First of all the alarmists predicted the Arctic would be free of Summer ice in by 2013.

That was wrong.

Peer reviewed papers show the Arctic had less ice in the Holocene warm period 6-10000 years ago.
The top graph shows simulated annual mean sea ice thickness [orange curve] was
much less during the Holocene Climate Optimum ~13,000-6,000 years ago
compared to the end of the 20th century at right side of graph.
The bottom graph shows multiple proxies of sea ice with darker green
indicating periods of less sea ice. Modern sea ice is at high levels in
comparison to the rest of the Holocene.