Drawing a straight line through cyclical data is one way to mislead.
Hiding the inconvenient data before 1979 is another way to mislead.
“The American Navy Joint Ice Center has produced weekly charts which have been digitised by NOAA ….. Since about 1976 the areal extent of sea-ice in the Northern Hemisphere has varied about a constant climatological level but in 1972-1975 sea-ice extent was significantly less.
Between 1990 and 2001, the IPCC rewrote the Arctic sea ice satellite record, and changed a trend of ice increasing to ice decreasing.
1995 IPCC Report
2001 IPCC Report
In the 1985 DOE Report ice increased from the 1950s to the 1970s.
in 1958, the USS Skate surfaced at the North Pole. Arctic sea ice averaged two meters thick.
Now the ice is two meters thick.
When Stonehenge was built, there was less ice in the Arctic and trees grew all the way to the edge of the Arctic Ocean.
The current IPCC report says snow cover is declining due to human influence.
“Over recent decades, widespread loss of snow and ice has been observed, and several elements of the cryosphere are now in states unseen in centuries (high confidence). Human influence was very likely the main driver of observed reductions in Arctic sea ice since the late 1970s”
Snow cover is at a record high.
Snow cover in South America reached an all-time record high earlier this year.
Snow cover in Australia and New Zealand has also been far above normal this year