Insignificant record warming and other climate remarkables from deniersville

Despite climate science deniers thinking global warming will stop on 20 January, there is little changed in climate conspiracy land. It's just more of the same old denier memes that have been circulating for years. At WUWT they've had John Christy going on about CO2 being plant food, and some very detailed work to try to prove something or the other about the medieval climate anomaly (see the interactive map and references here).

Deniers still enraptured with medieval warming

Regarding the latter, I'm not sure that deniers know that it was climate scientists who did the hard work to determine the extent and timing of warmer and cooler periods in recent history. (In climate terms, the Holocene is recent history.)  Many of them have some odd notion that climate scientists, who've been the ones finding out about the past, have also been trying to "cover up" what they've found.

Deniers are a odd bunch.

UAH latest beta version shows the lower troposphere has been warming up

I was looking at the latest temperature data for the lower troposphere, from UAH. That is, the latest version (v6.0 beta). Roy Spencer has provided an update at WUWT (archived here).

Did you know that the monthly global average for the lower troposphere has been lower than the average for the period from 1981 to 2010 on only 28 of the 128 months since January 2001? That is, in only 16% of the months this century, has the global monthly mean been less than the 30 year average to 2010. That's right. I'm not talking about an average from the twentieth century or the middle of last century. This is the average from 1981 to 2010. Recent times. And that's assuming he's got his tropospheric temperatures right this time around.

And it's only happened once in the three years since April 2012. And then only by 0.01°C - in May 2013.

Anthony Watts puts Roy Spencer and John Christy on notice

Anthony Watts has put Roy Spencer and John Christy on notice (archived here). He has found an article about how some computer programmers have written a fancy paper. The paper is "fancy" in that if you click on links and charts, you're apparently taken to program code and data.

Now providing data and code might be new in the world of computer science but it's been the norm for climate science for years. There's more data than deniers know what to do with. Articles on anti-science blogs like WUWT show that deniers don't have a clue what to do with the data that is available. In fact most of them don't even know that there is a heap of data and code they can play with.

Deniers will be delighted with UAH v. 6 beta

Roy Spencer and John Christy have finally, nine years later than first mentioned, released version 6.0 beta of the UAH temperature record. Deniers will be delighted. Here is a comparison of v5.6 and v6.0 together with RSS.

Data sources: UAH v6, UAH v5.6 and RSS

UAH v6 is now a touch cooler than RSS and the trend isn't as steep. However v6 beta lines up better with RSS for the last couple of years.

You can read about it on Roy Spencer's blog - I've archived his description of the changes here.