University of Alabama, Huntsville (John Christy) just published their UAH lower troposphere data for January 2008. Like the RSS data set, it shows a negative anomaly, and a steep decline in the past 12 months though the magnitude of the anomaly is slightly lower at ∆T -.588 than the RSS ∆T -.629 degrees Centigrade.
I’ve plotted the UAH data below, as I did for the RSS data in the previous post:
And a zoomed version with the Delta T highlighted:
click for larger images
So as before, we have an indication that the huge La Niña event going on in the Pacific may be responsible for rapid temperature changes in our atmosphere. There’s also the ongoing solar minima thats dragging on. But there’s more to it than that. Joe Bastardi of AccuWeather recently wrote this on ICECAP about the pattern that has emerged:
“It is straight out of the book of climate. The pattern is so much like the 1949-1950 La Nina, which was signaling the start of the reversal of the warming of the earth’s climate in the 1930s, ‘40s and early 50s. Only someone choosing to ignore it, or not wanting to see it, would not be cognizant of it. But because such a pattern leads to warmer than normal conditions in areas where the greatest centers of human induced global warming information comes out of, western Europe and the eastern part of North America, no attention is being called to the fact that the winter this year does have outstandingly large areas of colder than normal temperatures and in areas, the vast expanses of the tropical Pacific, and the vast expanse of the air above us.”
There’s a lot to be said for human pattern recognition, and when somebody of Joe Bastardi’s experience and skill makes a statement like the one above, we should give it credence.