Thesun'slong-termchangesfirsttoearth'sclimatehaveaneffect.Meanwhile,thesun'scyclechanges,alsoinfluencetheearth'sclimate.Scientistsexaminingtheearth'sclimatechangethatsolar"byDEtinyperiod"(i.e.,thesolaractivitywasveryweakperiod)andonearthalittleiceminimumtemperaturesexistcontact.Alsohasalotofscientificevidencethatthetemperatureofthefirsthalfperiodinthe20thcenturybytheinfluenceofthesun'sactivitycycle.
Thesunitselfaveragechangeradiationtoearthbasicisrelativelystable,butthesunitselfcycleofactivitywillhaveontheearth'sweatherproducecertaineffect.Theoriginalresearchthinkstheimpactisnotbig,puttheinfluenceofhumanactivityconsiderhadabitmore,butinvestigationhundredsofyears,eventhousandsofyears'activities,willfindtheclimateandevenmanynaturaldisastersandsolaractivityhasarelationship.
InChina,whenthesun'sactivityintinyyears,YellowRiver,Yangtzeriverbasinoftenhappensdrought.Since2006,thesunintoaveryinactiveperiod,thisperiodcorrespondstoChinadroughtandmanyverybadweatherconditions.Thatyear,yunnanoccurredingenerationsdrought,theUnitedStatesappearedingenerationstorrentialrain,globalappearedmanyrarenatural