7、cclimaticvariables:precipitationandtemperature.Foraglaciertogrowormaintainitsmass,theremustbesufficientsnowfalltomatchorexceedtheannuallossthroughmelting,evaporation,andcalving,whichoccurswhentheglacierlosessolidchunksasicebergstotheseaortolargelakes.Ifsummer temperature