FormationandVariationoftheGreatPacificGarbagePatchAbstractInthispaper,webuildamodelbyutilizedynamicanalogtoexpoundtheformationoftheoceangarbagepatch.Ourdestinationistotrackthelitterdebrisandforecastitsfutureconditionstohelpmanagingit.Aftertheanalysis,wefindthatthevelocityoftrashalleviatesastimegoeson.Trashdoesitsmotionintwoprobableways,oneisduetoresistancesgivenbyseawater,andanotherisduetodampedvibration.Byusingclassicphysicaltheories,wecapturemainmotivespropellingtrashintotheSouthPacificGyre.That’showthegreatgarbagepatchforms.Accordingtothemodelandtheitsresult,weformulatethemonitoringprogram.Comparedwiththephysicaltruth,themodelalsohassomeunsatisfactoryaspects,butithassomereference.IntroductionWhereeveristheworld’slargestdump?ItislocatedinthePacificOcean,aboutonethousandsixhundredkilometerswestofCalifornia,calledtheGreatPacificOceanGarbagePatch.Accordingtopertinentdata[1],itistenmilliontonsofdebrislitterthatispilingupthere,likeaplasticsoupwhenpeoplearelookingahead.And80percentofthetrashisfrommaincontinents,10percentconsistsofusednetsorotherfishingtoolsandtheother10percentoftrashisfrompassing-byships.Mostofthegarbageislandsareinoceanicgyres.Nowadays,awidevarietyoftechnicalandscientificproblemsassociatedwiththisdebrismassarecomingtolight.Butuntilnow,noonecanreasonoutit’scoverageareaexactlyandthegreateconomiclossesecologicalimpactandthePacificOceanGyrehascaused.Long-termeffectivemethodsaresearchedtoobjectivelycharacterizetheGyre.TheoceancurrentisthemechanismoftheGreatPacificOceanGarbagePatch.Inourpaper,wewilltakethesouthpacificoceangarbagepatchforexample,focusingonhowthedebrislitterdriftsinthefluid,assemblesinquantity,distributesundertheeffectofoceancurrentsin.Afterwards,inaccordancewithourmodel,weprojectprocessreasonablesuggestionstomonitortheGyre,trackingit’sgrowth.Assumptions1.Regardlessoftimeandgeographicalposition’simpactsonthespeedoftheoceancurrents,weconsiderthespeedasconstantvalue.2.Accordingtothedatum[2],wedesignatethespeedofthewestwinddriftvp1as1.4km/h,thatofPeruCurrentvp2as1km/h,thatofthesouthequatorialwarmcurrentasvp33km/h,thatofthenorthAustraliacurrentasvp41.4km/h.3.RegardtheflowofthecurrentsasstationaryflowandtheseawaterasNewtonianfluid,whichmeanstheviscosityoftheseawaterisconstant.4.Considertheleveloftheseaisinlaminarflow.5.Themasspoint’smotionintheseacanbeinfluencedbytheoceancurrentnomatterhowfarthemallpointisawayfromit.6.Themasspoint’smotionissynthesizedbythesub-movementofperoceancurrentregardlessofeffectsofotherfactors.TheModelInourmodel,wewillutilizedynamicanalogtoexpoundtheformationoftheoceangarbagepatch.Themodelsubstitutesstraightlinesforoceancurrentswhichformthegyre,inthemodeltheorientationofthestraightlinerepresentativeoftheflowdirectionandthespeedvalueretrospecttotheassumptionNo.4.Sequentially,wesimplifythephysicaltruthasthatshowninthefigure1.(DuetothechangeofthedirectionofthePeruCurrentonpassage,thesimplifiedmodelreplacestowstraightlines,whichareofthesamespeedbutdifferentdirection,ofthePeruCurrent.)Figure1:theDistributionoftheOceanCurrentsintheSouthPacificOceanThen,ourmodeltalksoverhowtheoceancurrenteffectthemasspoint’smovement,morespecifically,theeffectonthevelocityofthedirectionparalleltothelineandperpendiculartotheline.Let’sdiscusstheeffectonthemasspoint’svelocityofthedirectionparalleltothelinefirstly.AccordingtotheassumptionNo.3andNo...
