Part Seven — Upper Tropospheric Models & Measurement — recent measurements from AIRS showing upper tropospheric water vapor increases with surface temperature (scienceofdoom.com)
Expectation of small but positive CO2 - greenhouse warming is consistent with his claims of strong negative feedbacks by upper tropospheric water vapor or cirrus clouds which would lose sense without initial warming in the global tropics. (julesandjames.blogspot.ru)
(This paper, by Shine & Sinha, appears to have been inspired by Lindzen's 1990 paper where he talked about the importance of upper tropospheric water vapor among other subjects). (scienceofdoom.com)