It is interesting to see the Washington Post ( i.e., one of the arms of corporate media) reaction (that it is 'nonsense') to Paul Beckwith and Robert Scribbler's assertion that we should be concerned that the jet streams have merged-that is, broken their west to east pattern of flow, divided in temperature by the equator- and can now flow north to south) and to be concerned that if this pattern continues as a new normal, hot and cold weather across the globe will mix in ways that create more extreme weather, and that this is related to the rapid arctic ice melt.  Because of that, will just post this basic info on the jet streams...

http://www.srh.noaa.gov/jetstream/global/jet.html