Climate Denial Crock of the Week – “The Medieval Warming Crock”
Another great Peter Sinclair video about a denier favorite: the Medieval Warm Period.
You can read about this crock here at SkepticalScience:
The skeptic argument: The Medieval Warm Period was warmer than current conditions. This means recent warming is not unusual and hence must be natural, not man-made.
What the science says: While the Medieval Warm Period saw unusually warm temperatures in some regions, globally the planet was cooler than current conditions.
The Medieval Warm Period spanned 950 to 1250 AD and corresponded with warmer temperatures in certain regions. During this time, ice-free seas allowed the Vikings to colonize Greenland. North America experienced prolonged droughts.
The Medieval Warm Period was not a global phenomenon. Warmer conditions were concentrated in certain regions. Some regions were even colder than during the Little Ice Age. To claim the Medieval Warm Period was warmer than today is to narrowly focus on a few regions that showed unusual warmth. However, when we look at the broader picture, we see that the Medieval Warm Period was a regional phenomenon with other regions showing strong cooling. Globally, temperatures during the Medieval Period were less than today.
Nancy
outerbanksharvest
Michelle
There might be global warming or cooling but the important issue is whether we, as a human race, can do anything about it.
There are a host of porkies and not very much truth barraging us everyday so its difficult to know what to believe.
I think I have simplified the issue in an entertaining way on my blog which includes some issues connected with climategate and “embarrassing” evidence.
In the pipeline is an analysis of the economic effects of the proposed emission reductions. Watch this space or should I say Blog
http://www.rogerfromnewzealand.wordpress.com
Please feel welcome to visit and leave a comment.
Cheers
Roger
PS The term “porky” is listed in the Australian Dictionary of Slang.( So I’m told.)