The favored term lately has seemed to be “climate change”, and perhaps that is because the data for global warming is becoming suspect.
Regardless of who is correct in this latest imbroglio, it is clear we want to study long and hard before acting in such a way as to either bankrupt the economy or ignore the possibility the data is correct.
Our Climate Numbers Are a Big Old Mess
By PATRICK MICHAELS
April 18, 2008; Page A17
President George W. Bush has just announced his goal to stabilize greenhouse-gas emissions by 2025. To get there, he proposes new fuel-economy standards for autos, and lower emissions from power plants built in the next 10 to 15 years.
Pending legislation in the Senate from Joe Lieberman and John Warner would cut emissions even further – by 66% by 2050. No one has a clue how to do this. Because there is no substitute technology to achieve these massive reductions, we'll just have to get by with less energy.
Compared to a year ago, gasoline consumption has dropped only 0.5% at current prices. So imagine how expensive it would be to reduce overall emissions by 66%.
The earth's paltry warming trend, 0.31 degrees Fahrenheit per decade since the mid-1970s, isn't enough to scare people into poverty. And even that 0.31 degree figure is suspect.
For years, records from surface thermometers showed a global warming trend beginning in the late 1970s. But temperatures sensed by satellites and weather balloons displayed no concurrent warming.
These records have been revised a number of times, and I examined the two major revisions of these three records. They are the surface record from the United Nations' Intergovernmental Panel on Climate Change (IPCC), the satellite-sensed temperatures originally published by University of Alabama's John Christy, and the weather-balloon records originally published by James Angell of the U.S. Commerce Department.
The two revisions of the IPCC surface record each successively lowered temperatures in the 1950s and the 1960s. The result? Obviously more warming – from largely the same data.
The balloon temperatures got a similar treatment. While these originally showed no warming since the late 1970s, inclusion of all the data beginning in 1958 resulted in a slight warming trend. In 2003, some tropical balloon data, largely from poor countries, were removed because their records seemed to vary too much from year to year. This change also resulted in an increased warming trend. Another check for quality control in 2005 created further warming, doubling the initial overall rate.
Then it was discovered that our orbiting satellites have a few faults. The sensors don't last very long and are continually being supplanted by replacement orbiters.
The instruments are calibrated against each other, so if one is off, so is the whole record. Frank Wentz, a consulting atmospheric scientist from California, discovered that the satellites also drift a bit in their orbits, which induces additional bias in their readings. The net result? A warming trend appears where before there was none.
There have been six major revisions in the warming figures in recent years, all in the same direction. So it's like flipping a coin six times and getting tails each time. The chance of that occurring is 0.016, or less than one in 50. That doesn't mean that these revisions are all hooey, but the probability that they would all go in one direction on the merits is pretty darned small.
