On Sun, Jan 17, 2010 at 9:34 PM, Graydon <o...@uniserve.com> wrote: > On Sun, Jan 17, 2010 at 08:41:37PM -0500, P. J. Alling scripsit: >> On 1/17/2010 7:15 PM, Graydon wrote: >>> Especially for what, exactly, you consider the "medieval warm period". >> The period around 1000 AD when the Vikings were settling Greenland and >> Wine grapes were growing in Scotland. > > Not global; these were mostly confined to Europe, not even the whole > North Atlantic basin. Best available evidence is that the global mean > temperature was below the current level during that period. > > > -- Graydon
the only indications that global temperatures were lower during the Medieval Climate Optimum were based on Mann's work, which has been extensively debunked and the CRU leaks show pretty clearly that he was mucking with his data and the data that wasn't mucked with is tree-ring data which is not considered indicative of either atmospheric conditions or temperature by biologists (the closest correlation is to precipitation, and that's less than 50%). -- M. Adam Maas http://www.mawz.ca Explorations of the City Around Us. -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
