简介:Biogeochemicalcharacterofdissolvedinorganicnitrogenandphosphateatplumefrontisstudiedbasedonthedata,whichwereobservedintheChangjiangRiverEstuaryin1988.Theresultsareasfollows:Theconcentrationsofnitrateandphosphatechangeabruptlyatplumefrontandhalocline.TheconcentrationsofNO-2andNH+4areveryhighat10~25mdepth.TheverticalcircumfluencetransportsNO-3andPO3-4,whicharereleasedfromorganismsatthebottomtophytoplankton.