The are problems with the sfc t record There are no credible sci challenges to it This new section is absurdly US centered it can not possibly stand as it it This is the global record we re talking about You need some credible scientific papers not pictures of stations As far as I know the sfcstations stuff has merely documented problems with some station sitings and maintenance etc There is not even the beginning of an attempt at quantifying what influence plus or minus this might have on the record If you re interested there are papers about the effects of switching from north wall screens to stevenson screens thatched huts in africa etc etc