Read here. Honestly, sometimes the debunking of climate "settled" science feels like shooting fish in a barrel. As we have discussed often at 'C3', most of the IPCC climate predictions have proven to be wrong - certainly, one can fairly conclude that actual climate science is very unsettled at this point in time.
With that said, another debunking of an IPCC prediction has been confirmed.
Recent research by Aydin et al. established, without reservation, that methane gases had not increased as predicted by the AGW hypothesis and the UN's IPCC Climategate scientists were promulgating. In essence, the infamous "methane" tipping point is another failed climate model prognostication.
This team of researchers spent tax payer monies to speculate what happened to the IPCC's methane and, of course, to make an implied plea for more funds to investigate further. Did we say "unsettled" yet?
"Recent data from NSF-funded research in both Greenland and Antarctica demonstrate that fossil-fuel related emissions of both methane and ethane, two of the most abundant hydrocarbons in the atmosphere, declined at the end of the twentieth century...causes of the decline in methane emission rates to the atmosphere have been puzzling scientists for some time. This new study shows that a change in human activities may have played a key role in the recent leveling off of methane, which, being a potent greenhouse gas contributes to global temperatures..."
"We still have more research to conduct, but this discovery is significant... We must work together to continue to find ways to further our research on this very important subject." [Murat Aydin, Kristal R. Verhulst, Eric S. Saltzman, Mark O. Battle, Stephen A. Montzka, Donald R. Blake, Qi Tang, Michael J. Prather 2011: Nature]