Let’s take a look at what Arctic sea ice extent has been up to over the years. We’ll use the satellite data which extend back to late 1978, rather than the MASIE data which don’t start until 2006 (especially since those who publish it recommend using the satellite data anyway).
Glenn Beck recently interviewed Carly Fiorina. Here’s part of their conversation:
Beck: You believe in global warming, that it’s man-made.
Fiorina: No, I didn’t say that. What I said was, scientists tell us that global warming is real and man-made.
My opinion: Carly Fiorina makes Donald Trump look good.
Wouldn’t you know it, I just posted about how dumb it is to talk about “trends” without enough data to talk about trends intelligently, when it’s brought to my attention that there’s yet another example of doing just that.
Here’s temperature anomaly in the USA (yearly averages for the “lower 48”) since 1880, according to NOAA (National Oceanic and Atmospheric Administration):
He laid it on the line, no ifs, ands, or buts, and his message is having a HUGE effect. Catholics are now having conventions about how to be better stewards of the earth. Republican politicians, who have worn their denial proudly until now, are being shamed by the leader of Christianity talking about a fundamental moral issue. You bet it’s having a profound effect.
At this point, perhaps Pope Francis is our most effective advocate. He makes even Republicans tremble.
A reader recently requested that I revisit the issue of adjusting temperature data to allow for known factors, the ones that don’t affect the trend but do cause fluctuations, in order better to isolate the trend changes, which are mainly due to greenhouse gases. We can call those known influences exogenous factors. I’ve dealt with this many times, and published research about it, so I’m not going to say very much about the methodology.