Climate change over 425,000 years
BIDINOTTO BLOG
posted 05/20/07 (edited Sunday, May 20, 2007 10:32)
Want the big picture on "global warming"?
The environmentalists cherry-pick their temperature data. It's easy to declare an increasing temperature trend by starting your measurements in a very cold period, then plotting a subsequent graph that shows temperatures climbing upward out of that trough. Environmentalists choose to start plotting temperatures over the past 150 years, because 150 years ago we were in a cooler period than now. Thus, voila! Graphic "proof" of "global warming."
But what if we start plotting temperatures earlier than that -- much earlier?
It's easy to see their manipulative scaremongering when Earth's temperature changes are viewed over a VERY long-term perspective...like 425,000 years. Here's a temperature graph, based on NASA NOAA climate data drawn from Antarctic ice core samples, that I pulled from the following site:
seed.slb.com
Now, taking the long-term vantage point, tell me if you see anything particularly unusual or alarming about today's temperatures (the far right of the graph):
Global temperature variation for the past 425,000 years. The present is at the right. The horizontal 0 line represents the 1961-1990 average global temperature. The numbers on the left show the variation from that baseline in °C.
The data were derived from an analysis of ice cores taken at the Vostok station in Antarctica. Find out more about how temperature estimates are made from proxy data.
Image based on data from the National Oceanographic and Atmospheric Administration.
The site goes on to provide this commentary:
"The present day is at the far right of the chart. What do we see? First of all, there's quite a bit of fluctuation. There are long periods of time when the average global temperature was as much as 9°C colder than now. These were Ice Ages. Much of the northern part of the world was covered with thick sheets of ice, much like we see today in Greenland and Antarctica. The most recent Ice Age ended about 12,000 years ago. There were also times when it was warmer than today. On the whole, we are in a relatively warm period. [emphasis added]
So: We're at the peak of a warm period that, in fact, is actually cooler than some previous warm periods! In short...we're between Ice Ages.
As you see, temperatures over the past 150 years are a mere hiccup in the global climate record and not at all out of line with overall cyclical trends.
Just another "inconvenient truth" for renowned climatologists Al Gore and Leo DiCaprio to chew on.
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