Of course, for the hardcore Deniers, it won’t make any difference. What’s your guess about why denial of scientific evidence, in this case rising temperatures, is a decision made by some?
From an NPR report:
The research team tracked temperature by studying chemicals in the shells of tiny, fossilized sea creatures called foraminifera. Their temperature record matches other techniques that look back 2,000 years, which supports the validity of their much longer record.
One of the authors of the study, Shaun Marcott, a geologist at Oregon State University, said that (emphasis added throughout)
… “˜global temperatures are warmer than about 75 percent of anything we’ve seen over the last 11,000 years or so.’ The other way to look at that is, 25 percent of the time since the last ice age, it’s been warmer than now. …
… Marcott says the record shows just how unusual our current warming is. “˜It’s really the rates of change here that’s amazing and atypical,’ he says. Essentially, it’s warming up superfast.
At the end of the ice age, NPR’s Christopher Joyce, reports, temperatures warmed; about 5000 years ago, temperatures started cooling, but
“˜really slowly … 1.3 degrees Fahrenheit, up until the last century of so. Then it flipped again ““ global average temperature shot up.
“˜Temperatures now have gone from that cold period to the warm period in just 100 years,’ Marcott says.
So it’s taken just 100 years for the average temperature to change by 1.3 degrees, when it took 5,000 years to do that before.
The prediction by “climate scientists” is that the trend will continue, “given the amount of greenhouse gases going up into the atmosphere.”
As a report at The Wall Street Journal put it:
The study points to human activity as the cause, because the suddenness of the shift in temperature appears to be out of whack with long-term trends.
Here’s the Abstract from A Reconstruction of Regional and Global Temperature for the Past 11,300 Years, by Shaun A. Marcott, Jeremy D. Shakun, Peter U. Clark, and Alan C. Mix.
Surface temperature reconstructions of the past 1500 years suggest that recent warming is unprecedented in that time. Here we provide a broader perspective by reconstructing regional and global temperature anomalies for the past 11,300 years from 73 globally distributed records. Early Holocene (10,000 to 5000 years ago) warmth is followed by ~0.7Ã‚Â°C cooling through the middle to late Holocene (<5000 years ago), culminating in the coolest temperatures of the Holocene during the Little Ice Age, about 200 years ago. This cooling is largely associated with ~2Ã‚Â°C change in the North Atlantic. Current global temperatures of the past decade have not yet exceeded peak interglacial values but are warmer than during ~75% of the Holocene temperature history. Intergovernmental Panel on Climate Change model projections for 2100 exceed the full distribution of Holocene temperature under all plausible greenhouse gas emission scenarios.
Thinking again of the climate change deniers “” maybe it’s just another instance of avoiding the need to make changes, and more fundamentally yet, take responsibility.
(Climate Change Studies Nation of Change)