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Politics : Formerly About Advanced Micro Devices -- Ignore unavailable to you. Want to Upgrade?

To: THE WATSONYOUTH who wrote (845523)	3/26/2015 6:31:35 PM
From: Brumar89	Respond to of 1573958

Wasn't tremendous amounts of CO2 added to the atmosphere during that period?... Absolutely. What did the global warming alarmist computer models predict for this last 18 year period. Global warming has been overestimated by climate models and there has been zero warming since 1998, according to a recent paper in Nature Climate Change.Recent observed global warming is significantly less than that simulated by climate models, according to the paper "Overestimated Global Warming Over The Past 20 Years" by John Fyfe, Nathan Gillett and Francis Zwiers. This difference might be explained by some combination of errors in external forcing, model response and internal climate variability, they suggest. Gillett and Zwiers both contributed to the current Intergovernmental Panel On Climate Change AR5 science report. The authors compared climate model simulations with observational data on the global mean surface temperature for the period from 1993 to 2012. "The observed rate of warming given is less than half of this simulated rate, and only a few simulations provide warming trends within the range of observational uncertainty," they report. They point out that the inconsistency between observed and simulated global warming is even more striking for temperature trends computed over the past fifteen years (1998–2012). For this period, the observed trend of 0.05 ± 0.08°C per decade is less than a quarter of the average simulated trend of 0.21 ± 0.03°C per decade. "It is worth noting that the observed trend over this period — not significantly different from zero — suggests a temporary ‘hiatus’ in global warming," they state. "The evidence, therefore, indicates that the current generation of climate models... do not reproduce the observed global warming over the past 20 years, or the slowdown in global warming over the past fifteen years," they write. Here's a link to the paper. Here's a link to a briefing about the paper. pacificclimate.org reportingclimatescience.com