Since disappearing the 300-year Medieval Warm Period
worked so well to advance the AGW propaganda war, some of the most militant activists at NOAA and NASA decided, apparently, to apply the same magic to make the heat wave of the 1930s disappear, too.
South American and Asian monsoons were more active during the cold Little Ice Age and less active during the Medieval Warm Period
Distinctive periods, such as the Medieval Warm Period
or the Little Ice Age stand out, but do not show a globally uniform pattern on multi-decadal time scales," said Heinz Wanner of the University of Bern in Switzerland, one of 78 researchers from 24 countries who took part in the project.
This Medieval Warm Period
has been cited by sceptics of anthropogenic climate change as evidence that current warming could be naturally driven.
Prior to Mann's work, it was generally accepted that there was a Medieval Warm Period
or "Medieval Maximum," when temperatures were several degrees warmer, on average, than in the preceding half a millennium or so.
We had a Medieval Warm Period
from 800 to 1300 when serfs could take their vests off well before May was out because it was a warmer than it is now.
In the Neotropics marine and continental paleoclimatic records suggest the occurrence of conditions related to the Medieval Warm Period
(MWP, ~800-1300 AD) and the Little Ice Age (LIA, ~1300-1800 AD).
If the medieval warm period
may be attributable to causes other than greenhouse gas concentrations, that does not mean that those causes are the only ones that can give rise to warming, and it is surely illogical to assume that to be the case, as Mr McNally appears to do, dismissing the judgement of the world's scientific community.
Comparable variations in temperature during the Medieval Warm Period
of the 11th to 14th centuries and the Little Ice Age of the 17th to 19th centuries also are thought to have been due to changes in the North Atlantic Oscillation.
Hundreds of peer-reviewed scientific studies from all over the world indicate a Medieval Warm Period
as warm or warmer than present temperatures.
No one knows what caused the Medieval Warm Period
, which lasted from about A.
YOU'VE heard about the medieval warm period
between 900 and 1300.