Int. J. Environ. Res. Public Health 2011, 8 1001 feedback reinforcing the small amount of warming that can be caused by increasing CO2 alone. The feedback creates the hotspot and is responsible for much of the temperature rises predicted by the IPCC models [27]. If non-water vapor greenhouse gases are significantly warming the Earth, the first signs of it are supposed to appear above the tropics. Since no such hotspot has been found, the models and therefore the UN‘s hypothesis concerning feedback are wrong [27]. Various efforts have been made to argue that those looking for the hot spot might have missed it, but have not claimed to have actually found it [28,29]. Sherwood et al. tried to find every possible source of uncertainty in the observations in order to argue that agreement with the models was marginally possible. The data are based on well established radiosonde technology and hundreds of tests so it quite unlikely that all the tests were wrong [27], so this hardly constitutes a convincing argument. Statistical counter-arguments to the issues raised by Santer et al. [28] can be found in McIntyre [30]. Sherwood et al. [29] claimed to have found the hotspot using a combination of temperature and wind data. Using wind data is an example of not using the most relevant observational data since temperature is the issue here. The claimed hotspot, however, is much too faint compared to what the IPCC models predict and there is no rationale for using wind data in place of temperature data [27] when temperature is what is being studied. Lindzen reaches similar conclusions [22] in slide 47. This hotspot test is perhaps the best known of the tests of the feedback hypothesis, and has been widely written about. One of the most comprehensive and detailed discussions may be Evans [27]. The most easily understood non-technical discussion is probably [31]. The failure of the IPCC or others to find the hotspot that they agree should be present is sufficient by itself to determine that the IPCC‘s feedback hypothesis is incorrect, and that the feedback effects of increasing CO2 are therefore much smaller than claimed by the IPCC. 2.3.1.3. There Is Heating of the Oceans The added heat believed by CAGW supporters to be generated by increasing greenhouse gas levels in the atmosphere must be stored somewhere. It has not been showing up in the atmosphere in the last decade, so if the hypothesis is valid it must be going into the oceans. But sea temperature data from the ARGO array for 2003–2008 show no increase, so this has not been the case. An extensive discussion of the evidence can be found in DiPuccio [32]. He concludes that: ―In brief, we know of no mechanism by which vast amounts of ―missing‖ heat can be hidden, transferred, or absorbed within the earth‘s system. The only reasonable conclusion—call it a hypothesis—is that heat is no longer accumulating in the climate system and there is no longer a radiative imbalance caused by anthropogenic forcing. This not only demonstrates that the IPCC models are failing to accurately predict global warming, but also presents a serious challenge to the integrity of the AGW hypothesis.‖ Similar questions have been raised and conclusions reached by Roger Pielke Sr. in [33] and preceding references noted there. Lindzen [22] argues on slide 48, referencing Schwartz [34,35], that the rate of change of ocean temperatures shows slightly negative feedback. Hansen and colleagues argue [36] that such warming should be occurring.