Ice Follies and Hiding the Declineby Jonathan DuHamel on Mar. 23, 2012, under Climate change
Anthony Watts at Watts Up With That points out a curious thing about reporting of Arctic sea ice extent.
It seems that IPCC reports after 1990 and current federal government agencies show graphs of the Arctic sea ice extent that all begin in 1979, see example below:
This gives the impression that Arctic sea ice has been in steady decline. But the first IPCC report in 1990 included pre-1979 satellite data which shows that prior to 1979, Arctic sea ice was much lower in extent, about equal to what it is now (page 224 of IPCC FAR WG1):
If these earlier data were included in current reports, it would make the Arctic sea ice variation appear cyclic rather than declining. Could it be that our politically correct, cherry-picking climate “scientists” are trying to hide the decline?
By the way, study of sediment cores spanning the last 9,000 years found that “that sea-ice cover in the western Arctic Ocean has varied throughout the Holocene. More importantly, there have been times when sea-ice cover was less extensive than at the end of the 20th century.” And, the study authors write: “It is important to note that the amplitude of these millennial-scale changes in sea-surface conditions far exceed those observed at the end of the 20th century.”
McKay, J.L., et al., 2008, Holocene fluctuations in Arctic sea-ice cover: dinocyst-based reconstructions for the eastern Chukchi Sea, Can. J. Earth Sci. 45.
See here how the “ministry of truth” is revising the historic temperature record to make the past seem cooler and the present warmer.