Real Climate has noted what I think is quite a shocking misrepresentation. It is in this slide:
It's yet another in the series of claims that someone is "manipulating the record". That's a heavy accusation. But as RC I think convincingly demonstrates, this is not a comparison of two versions of the same index. It is a comparison of the land only, met stations index “GLB.Ts.txt” in 2012 with the land and ocean index “GLB.Ts+dSST.txt” in 2008. And, as is well known, the land index has a higher slope. As they show, the land ocean index properly compared has changed very little over that period.
So did Lindzen just make a mistake? Well, as Hank Roberts has shown, it looks awfully like he just lifted it, without attribution (but that's not to say without permission) from the JunkScience blog, Feb 7th.
Update: Here is my own plot of the difference between current values of GISS Ts (land only) and GISS Ts+dSST (land/ocean):
Update. Carrick suggested puting the plot of the diff between 2008 and 2012 LOTI on the same plot. I've done that. Following Gavin, I used the wayback Oct 2008 version, and showed the plots and trends to end 2007.
So for the 2012 cases, I got a slightly different trend to the above, which was for the period 1880-2011. The trend now is 0.114 °C/century, and the trend difference between LOTI 2009 and now is -0.00216 °C/century. This is slightly different to Gavin's, and has negative sign. I don't know why, but in absolute magnitude both trends are small. It's possible my wayback version is different from Gavin's.
Here's the plot. In the background (faint) is the initial plot, though cut at end 2007. In darker color is the diff in GISS LOTI (land/ocean) between the Oct 2008 version and now.