Global Warming

Just a few days ago, the Denver Post published an unusually balanced report on global warming. In it they quote meterologist Bill Gray. Dr. Gray is not a household name, but everybody knows his work — he is the preeminent hurricane forecaster, with a far better track record than anyone else in the world. He’s the forecaster the media quotes every year when they talk about the expected number of hurricanes.

Dr. Gray is a skeptic on global warming:

Gray is among the most strident critics, quick to use words like “fraud” or “gang” to describe the modelers.

Instead of model projections, Gray looks at the history and patterns of weather to find trends.

And befitting his 76 years, Gray has a long view. His first report on climate - on the return of the dust bowl - was in the early 1940s when he was in junior high school.

"We’d gone through a warming trend in the '40s, and everybody was saying we were going to win World War II but face terrible droughts,” Gray said.

Soon after, temperatures went into a cooling trend and by 1975, Gray points out, there was talk of a coming ice age.

The Earth does have natural cycles of cooling and warming - during the past 740,000 years there have been eight cycles with four ice ages.

The cycles appear to be tied to slight variations in the tilt of the Earth toward the sun.

During the last ice age - which ended about 10,000 years ago - Earth was on average about 4 degrees Fahrenheit cooler, and what is now Manhattan was buried under ice.

At some point the Earth will wobble on its axis again, setting the stage for an ice age.

There are other phenomena affecting global temperatures over time, such as El Niño, a Pacific Ocean warm-water mass that appears in roughly five-year cycles and changes world weather patterns.

And there is the Atlantic thermohaline current, a conveyor belt moving heat north on the surface and then dropping it to the ocean floor and heading back to the equator - a 1,200-year trip.

Changes in the current lead to changes in temperature. Somehow the models have to account for these natural variations too.

Gray believes that the warmer temperatures in the Northern Hemisphere are linked to a natural slowing in the thermohaline current, not the carbon dioxide.

Some of the models also show the current is slowing and that, along with warming oceans, adds to hurricane risks.

Dr. Gray is as skeptical of the model-based global warming forecasts as I am — but his weather forecasting credentials are impeccable, whereas mine are non-existant.

I’ll add one point this report didn’t cover: follow the money. Billions of research dollars each year are going to the global warming wing of meterology. Zippity-doo-dah is going to the skeptics. If you were an ambitious meterologist, what would attract you more? Hmmm???

Just one more reason why public funding of science is a mess…