Gareth wrote: > I'm working on a post at Hot Topic about this: > http://www.nbr.co.nz/home/column_article.asp?id=21153&cid=39&cname=NBR > > I've been looking for feedback on the Spencer paper (Cloud and > radiation budget changes associated with tropical intraseasonal > oscillations > RW Spencer, WD Braswell, JR Christy, J Hnilo - Geophys. Res. Lett, > 2007), but haven't found much.
Here's the abstract for this paper, for those not able to view the AGU site: ------------- doi:10.1029/2007GL029698 Abstract We explore the daily evolution of tropical intraseasonal oscillations in satellite-observed tropospheric temperature, precipitation, radiative fluxes, and cloud properties. The warm/rainy phase of a composited average of fifteen oscillations is accompanied by a net reduction in radiative input into the ocean-atmosphere system, with longwave heating anomalies transitioning to longwave cooling during the rainy phase. The increase in longwave cooling is traced to decreasing coverage by ice clouds, potentially supporting Lindzen's "infrared iris" hypothesis of climate stabilization. These observations should be considered in the testing of cloud parameterizations in climate models, which remain sources of substantial uncertainty in global warming prediction. published 9 August 2007. ------------- Looking at the article, I notice that there are references to the Heartland Institute so-called "2008 International Conference on Climate Change". Spencer presented a paper there and that's what the whole article is based on, I think. Here's a link to the conference web site, where proceedings are supposed to be posted (eventually): http://www.heartland.org/NewYork08/proceedings.cfm Roy Spencer's presentation was given on the last session at the very end of the list and there's no mention of a proceedings of his presentation. Maybe there's something in the audio section, since it would appear that Spencer is just talking?? I think Spencer's claims must also pass the same basic question as Lindzen's, which is, how could there have been Ice Ages if there is a strong negative feedback due to tropical clouds? Note that the author of the article you cite, Owen McShane, was also a presenter at the Heartland Conference and his powerpoint slides are available. E. S. --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups Global Change ("globalchange") newsgroup. Global Change is a public, moderated venue for discussion of science, technology, economics and policy dimensions of global environmental change. Posts will be admitted to the list if and only if any moderator finds the submission to be constructive and/or interesting, on topic, and not gratuitously rude. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/globalchange -~----------~----~----~----~------~----~------~--~---
