Oceanicgeneralcirculationmodelshavebecomeanimportanttoolforthestudyofmarinestatusandchange.ThispaperreportsanumericalsimulationcarriedoutusingLICOM2.0andtheforcingfieldfromCORE.WhencomparedwithSODAreanalysisdataandERSST.v3bdata,thepatternsandvariabilityofthetropicalPacific–IndianOceanassociatedmode(PIOAM)arereproducedverywellinthisexperiment.Thisindicatesthat,whenthetropicalcentral–westernIndianOceanandcentral–easternPacificareabnormallywarmer/colder,thetropicaleasternIndianOceanandwesternPacificarecorrespondinglycolder/warmer.ThisfurtherconfirmsthatthetropicalPIOAMisanimportantmodethatisnotonlysignificantintheSSTanomalyfield,butalsomoreobviouslyinthesubsurfaceoceantemperatureanomalyfield.Thesurfaceassociatedmodeindex(SAMI)andthethermocline(i.e.,subsurface)associatedmodeindex(TAMI)calculatedusingthemodeloutputdataarebothconsistentwiththevaluesoftheseindicesderivedfromobservationandreanalysisdata.However,themodelSAMIandTAMIaremorecloselyandsynchronouslyrelatedtoeachother.
