How about a summary in less that 100 words?
I have been looking foor the thread at WUWT,...haven't found it as yet.
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David Evans looked at all the major TSI datasets he could find in 2013, and downloaded the data available on 8 Aug 2013 when he froze the data used by the project. It’s harder to measure the sunlight than you might think, because there is a wide spectrum of light from UV to infra red. Everyone thought there was essentially no variation to measure up ’til late 1978 when people started observing it with satellites — it’s telling that TSI used to be called “the solar constant”. But there is really only one observed record that runs through the last 35 years, namely PMOD. ACRIM provides data from 1978, but before 1992 or so its results disagreed with PMOD and Lean (which is a reconstruction guided by PMOD). Like everything in climate, there is a war going over the adjustments and reconstructions and no one can agree. Fans of the IPCC now say the TSI was falling for decades, while others think TSI pretty much stayed high til the 23rd cycle and the 24th has been strikingly small.*
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The next data battleground is going to be when the fall in TSI occurred. If it occurred in 2003 as per the PMOD and ACRIM data, then a corresponding fall in temperature is on the cards for about 2017. If it started in 1995 as per the new SORCE/TIM reconstruction now favored by the IPCC suggests, then the corresponding fall in temperature should have been evident from about 2006 — but since it didn’t happen that would mean the solar influence is weak. In the return of a previous theme, the measured data favors the former, while the later relies on reconstructions (the SORCE/TIM data only starts in 2003, and is not relevant to the 11 year smoothed values in the mid 1990s) that flatly disagree with the measured data.
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In case you don’t have these from Chiefio
“Search Results for: the real TSI
← Older posts
Does Anybody Really Know What TSI It Is?
Posted on 15 December 2013 by E.M.Smith
Turns out TSI is a mess an one of the best solar researchers on the planet (IMHO) thinks were up for a Grand Minimum and lower TSI leading to a little ice age. Continue reading →
Posted in AGW Climate Perspective, AGW Science and Background, Earth Sciences, Science Bits | Tagged LIA, Solar, sun, TSI | 66 Comments
More TSI variation and big UV variance
Posted on 26 April 2013 by E.M.Smith
An interesting paper that finds TSI more variable in the past than is frequently believed, and finds a very large change in UV. Continue reading →
Posted in AGW Science and Background, Science Bits | Tagged climate, Solar, sun, TSI, UV | 24 Comments “