Most often on this forum we have looked at either surface temperature data from surface observations or lower tropospheric temperature data derived from satellite sounders. Today I’d like to point out a short scale trend in global radiosonde data showing cooling in the last year, as well as examine the record back to 1958.

The HadAT2 dataset from the Hadley Climate Center takes in balloon radiosonde measurements taken twice daily from hundreds of points around the globe and compiles it. Here is how they describe it:

Add another warming sceptic to the list - now so long that surely even the ABC must doubt the “consensus”. This time it’s Professor Bill Collins of James Cook University’s School of Earth and Environmental Sciences:

[The global warming debate is] not about mainstream (read official) scientists versus sceptics, enthusiasts or bloggers. Many of these people are good scientists. The debate is about how and why climate change is happening…

Ice ages are the most obvious evidence for climate change, and we are coming out of the medieval Little Ice Age now. As global temperatures progressively warm, many consider that this relates to carbon emissions dating from the 1850s, but the increase began approximately 300 years ago…

The sun on 08/12/2008 just before midnight UTC - spotless

As many of you know, the sun has been very quiet, especially in the last month. In a NASA news release article titled What’s Wrong with the Sun? (Nothing) solar physicist David Hathaway goes on record as saying:

“It does seem like it’s taking a long time,” allows Hathaway, “but I think we’re just forgetting how long a solar minimum can last.”

Rind begins his review and analysis of this important subject by noting that Charney et al. (1979) concluded that global temperature sensitivity to a doubling of the atmosphere's CO2 concentration was "between 1.5° and 4.5°C," while noting that since that time "we have not moved very far from that range." In addition, he reports that uncertainty in our assessment of high- and low-latitude climate sensitivity "is also still as great as ever, with a factor of 2 at both high and low latitudes."