I was going to just wait for you to respond as to why you found it interesting but the fact is that you likely won't respond so I'll just move on and tell you why although its interesting its also flawed.
The synopsis of that study is that it looks at outgoing radiation during periods of increased temps in the tropics. What they found was that when the temps rose in the areas between 20 degrees lat N and 20 degrees lat S there was an increase in outgoing radiation that indicated a low climate sensitivity.
However, the paper has a few really poor premises. First, the tropics are not the globe. Heat is transported around the world. These periods they studied were basically the positive side of the ENSO cycle or the El Nino phase. As you know, the entire globe's average temp rises during an El Nino year so you can't assume that while the tropics are losing a good deal of energy back out to space the entire globe is.
When you account for the entire globe, all of a sudden the results are completely different.
Two papers that addressed this:
http://www.agu.org/pubs/crossref/201...GL042911.shtml
http://www.agu.org/pubs/crossref/201...GL043051.shtml
More importantly though (and its so fitting the paper you linked is on Spencer's site considering the recent discussion regarding Spencer's bad model), the results obtained by Lindzen are the results of the data they put in. What I mean by this is that by manipulating the start and end dates of the data you put in, you can get pretty much any result you want to get.
Its like this, if in an analysis of my checking account I try to figure out how much money I have by ONLY looking at days where I make deposits then I'm not going to get an accurate picture. If I exclude days where I made deposits then I'm going to get a completely different picture as well.
This selective analysis is quite bogus and when your results don't stack up with all the data then it has no merit.
http://www.agu.org/pubs/crossref/201...GL042314.shtml
Interesting indeed.