Posted as requested below by Charles. NB there's no need for people to ask permission to post stuff!
A On Oct 7, 2013 3:52 PM, "Charles H. Greene" <[email protected]> wrote: > Dear Andrew: > > Please consider posting on the Geoengineering listserve. Thank you. > > Chuck Greene > > CITATION Cohen, J., J. Jones, J.C. Furtado, and E. Tziperman. 2013. Warm > Arctic, cold continents: A common pattern related to Arctic sea ice melt, > snow advance, and extreme winter weather. Oceanography 26(4), > http://dx.doi.org/10.5670/oceanog.2013.70. > > DOI http://dx.doi.org/10.5670/oceanog.2013.70 > > Abstract: Arctic sea ice was observed to be at a new record minimum in > September 2012. Following this summer minimum, northern Eurasia and much of > North America experienced severe winter weather during the winter of > 2012/2013. A statistical model that used Eurasian snow cover as its main > predictor successfully forecast the observed cold winter temperatures. We > propose that the large melting of Arctic sea ice may be related to the > rapid advance of snow cover, similar to the connection made in studies of > past climates between low Arctic sea ice and enhanced continental snowfalls > and glacial inception via ice sheet growth. Regressions between autumnal > sea ice extent and Eurasian snow cover extent and Northern Hemisphere > temperatures yield the characteristic “warm Arctic/cold continents” > pattern. This pattern was observed during winter 2012/2013, and it is > common among years with observed low autumn sea ice, rapid autumn snow > cover advance, and a negative winter Arctic Oscillation. Dynamical models > fail to capture this pattern, instead showing maximum warming over the > Arctic Ocean and widespread winter warming over the adjacent continents. We > suggest that the simulated widespread warming may be due to incorrect sea > ice-atmosphere coupling, including an incorrect triggering of positive > feedback between low sea ice and atmospheric convection, resulting in > significant model errors that are evident in seasonal predictions and that > potentially impact future climate change projections. > > -- You received this message because you are subscribed to the Google Groups "geoengineering" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at http://groups.google.com/group/geoengineering. For more options, visit https://groups.google.com/groups/opt_out.
