Climate Change: It’s Happened Before

The remarkable Roy Spencer, PhD comments on “Climate Change”:

From the opening remarks made by the Democrats on the Environment and Public Works (EPW) Committee, apparently you can see climate change yourself just by looking in your backyard, or seeing how far from shore fishermen must go now to catch fish, or even (help me with the logic on this one) the fact that smoking causes cancer.

I just submitted my updated written testimony (Spencer_EPW_Written_Testimony_7_18_2013_updated) to include the following chart (Click for full size):

This chart illustrates that, yes, we are currently warm, but not significantly warmer than the Medieval Warm Period (MWP) or the Roman Warm Period (RWP). So how is it we know today’s warmth is human-caused, when the last two warm periods couldn’t have been caused by humans? Hmmm?

And if you want to hit me with a Hockey Stick, might I remind you that there are many more papers supporting the MWP and RWP than there are supporting the Hockey Stick’s slick revision of history?

Or does “consensus” only count when it supports your side?

What’s that you say? The hockey stick is now the “new consensus”? So a scientific consensus can be wrong, after all? Hmmm.

Read the rest at Senate EPW Hearing: “Climate Change: It’s Happened Before” « Roy Spencer, PhD