I can’t resist. This is just a post of images from Kevin’s new Google Earth version of his maps. If you haven’t already read his post do so here as the info about the quality (number of years used to derive a trend) is important. Briefly – Version 1 <10 years = no trend; Version 2 <50 years = no trend.
Before showing the maps, let me remind you that there is strong evidence for multidecadal trends in worldwide climate data. Cyclical warming and cooling periods show up in many individual data sets (for example here and here) with the possible influence of the PDO and AMO. This being the case, more than 60 years of data is desirable to capture a full cycle. These maps show just how woefully inadequate the GHCNv2 data set is in meeting this criterion.
Of course in Google Earth they’re not just static pictures – they’re interactive. Zooming in brings up the station names and clicking on a station marker will bring up a graph of the station data. Now go on – download the KML files – you know you want to 😉
Files downloadable here: http://www.climateapplications.com/kmlfiles.asp