Little Ice Age coldest in Holocene, Holocene Optimum "several" degrees warmer than today

“Once again – see Barclay et al. (2009) and Menounos et al. (2009) – we have a situation where the Little Ice Age was found to have been the coldest period of the current interglacial [italics added], which suggests (once again) that 20th-century global warming could not have taken the earth into “uncharted” thermal territory, but only back to something similar to what prevailed prior to the Little Ice Age, like the Medieval Warm Period, which was merely a run-of-the-mill relatively warmer period that was still much colder than the several-millennia-long Holocene Thermal Maximum, which Briner et al. report “was several degrees warmer than today [italics added].” Consequently, since much larger temperature changes than the warming experienced over the 20th century occurred at various earlier times in the Holocene, when the air’s CO2 content was almost invariant, there is no need – nor even a compelling reason – to invoke the 20th-century increase in the atmosphere’s CO2 concentration as the cause of 20th-century warming.” “The Glaciation of Arctic Canada’s Baffin Island

“When it is realized that the Little Ice Age was likely the coldest interval of the current interglacial period, and that it extended all the way up to the start of the 20th century in western Canada, it can be appreciated that the warming that has been experienced there subsequently is certainly nothing out of the ordinary. In fact, it actually represents a return to what was “ordinary” over great intervals of the prior millennia. Hence, it can be appreciated that to return to that more ordinary climatic state surely does not require the help of an increase in the atmosphere’s CO2 concentration. The earth has experienced that condition many times before, without any increase in the air’s CO2 content; and it can surely experience it again, without any increase in the air’s CO2 content, as it indeed has done over the course of the 20th century, perhaps with a little help from its friend – the sun.” “Holocene Glaciers of Western Canada

Advertisements

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s


%d bloggers like this: