Posted May 18, 2013 by Anonymous Expert Participant:

Predicted CO2 ppm in 2100 Predicted radiative forcing relative to pre-industrial in 2100 Year of first ice-free Arctic summer

Posted March 9, 2013 by Ian Colquhoun:

I think there is a lot of room for future poll questions that deal with the ecological effects of global climate change -- e.g.: the effects of climatic warming on higher altitude ecosystems; the effects of climatic warming on fresh water resources; the effects of projected sea-level rise on coastal ecosystems (e.g., mangroves) and/or coastal human settlements; the effects of ocean acidification on marine fisheries; the potential impact of increased forest fire risk due to global climatic change; the risks associated with increased frequency and severity of tropical cyclonic storms; etc., etc.

Posted March 5, 2013 by Anonymous Expert Participant:

Is climate sensitivity or transient climate response the better parameter to use in projecting 21st century temperatures? What do you think is the most likely value for transient climate response? What do you think is the upper bound for transient climate response? What do you think is the lower bound for transient climate response?

Posted March 5, 2013 by Anonymous Participant:

There is a severe bias in your selection of question relative to what is known about warming since the last Glacial Epoch - when most of the Polar regions were under huge Glaciers - then melted slowly, and eventually allowed settlements, and human development = population growth - until the Maunder Minimum and Little Ice age brought back the Mess = loss of human options and life. Warming has always been best for Human Health and Welfare - and Cooling has Killed far more people than almost any Warm Events -

Posted March 4, 2013 by Laurent Labeyrie:

What actions individuals would accept to moderate global warming, what percent would.... actions on price of carbon energy, on incentive for new technology, on reglementation for house insulation, public transport... ideas on past climate changes : role of solar variability, ocean changes (variability of the Gulf Stream), melting of ice caps...

Posted February 23, 2013 by LuAnne Thompson:

For the questions of "how much did GW contribute to ..." A better wording would be "How much more likely did GW make X event?"

Posted February 17, 2013 by Anonymous Expert Participant:

Questions on Hurricane Sandy would be very interesting!

For some of the questions I am quite knowledgeable. For others, I have almost no expertise. There should be a way to tell you I have no expertise relevant to this question.

Posted November 15, 2012 by Anonymous Expert Participant:

Increases in methane concentrations appears to have stopped even though methane emissions are increasing. There might be some unknown chemical pathway for degradation of methane in the atmosphere or we might be estimating emissions incorrectly.

Posted September 14, 2012 by Anonymous:

As nearly ice free conditions emerge, it will become a matter of semantics whether the Arctic ocean is totally ice free or not. I believe that if conditions are such that minimum ice extent consistently falls below 0.5m km2 then the ocean will be effectively ice free, with the residual ice "sheltered" by the Greenland land mass. I fear this will occur either late in this decade, or in the early 2020s.

Posted July 26, 2012 by Michael MacCracken:

A possible question (or related set of questions): With ongoing emissions policies, what do you expect the methane concentration to be in 2100? With aggressive efforts to limit emissions of methane as one of the short-lived GHGs, what do you think the methane concentration could be in 2100 (including whatever government response that you think will be achieved)? Another question that might be of interest would relate to black carbon, both what its current contribution is and what it is likely to be.

Posted July 26, 2012 by Anonymous Expert Participant:

When will sea level have risen by 1 m?

Posted July 20, 2012 by Anonymous Expert Participant:

Assumed that "zero" coverage allows for some small pockets of ice remaining in the Canadian Archipelago - but an essentially ice-free Arctic Ocean.

Posted July 19, 2012 by Alan Betts:

The zero threshhold is too absolute. Just as pockets of snow survive on mountains thru the summer, patches of ice may be left when >95% of ice has gone. Question would be better with say When <5% of ice coverage left at end of summer melt season.

Posted on 19 July 2012 by dana1981, with additional comments by other participants: http://www.skepticalscience.com/news.php?n=1537