Global Warming More Moderate Than IPCC Worst-Case Models

Duke’s Nicholas School is a School of the Environment - not Environmental Sciences, or Environmental Studies, but the Environment. We strive for a new paradigm, one that views and attempts to understand the earth and the environment including humans as an integrated whole. (link)
A Press release from Duke Environment.

Global Warming More Moderate Than Worst-Case Models

DURHAM, N.C. – A new study based on 1,000 years of temperature records suggests global warming is not progressing as fast as it would under the most severe emissions scenarios outlined by the Intergovernmental Panel on Climate Change (IPCC).   
“Based on our analysis, a middle-of-the-road warming scenario is more likely, at least for now,” said Patrick T. Brown, a doctoral student in climatology at Duke University’s Nicholas School of the Environment. “But this could change.” 
The Duke-led study shows that natural variability in surface temperatures -- caused by interactions between the ocean and atmosphere, and other natural factors -- can account for observed changes in the recent rates of warming from decade to decade.  
The researchers say these “climate wiggles” can slow or speed the rate of warming from decade to decade, and accentuate or offset the effects of increases in greenhouse gas concentrations. If not properly explained and accounted for, they may skew the reliability of climate models and lead to over-interpretation of short-term temperature trends. 
The research, published today in the peer-reviewed journal Scientific Reports, uses empirical data, rather than the more commonly used climate models, to estimate  decade-to-decade variability.
Scientific Reports
5Article number: 9957 
doi:10.1038/srep09957 (link)

From the paper: Comparing the model-simulated global warming signal to observations using
empirical estimates of unforced noise by Patrick T. Brown, Wenhong Li,
Eugene C. Cordero & Steven A. Mauget published in Scientific Reports, doi:10.1038/srep09957.