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地球日与夜

地球日与夜 ADayintheLifeofEarth(2019)

评分：5.5
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主演：
类型： 纪录片
制片国家/地区： 英国
又名：ADayintheLifeofEarth
剧情简介：地球日与夜剧情：PresenterHannahFryrevealshowmuchourplanetcanchangeinjustasingledayandhowthesedailychangesareessentialtoourexistence. IfyouthinktheEarthtakesmillionsofyearstochange,it’stimetothinkagain!PresentedbyHannahFry,thisTVspecialrevealshowmuchourplanetcanchangeinjust24hours.AneweraofscienceallowsustowatchastheEarthmoves,breathes,shrinksandgrowsrightunderournoses.Thestoryisdrivenbyscientistsandexplorers,andharnessescutting-edgedata,newlylaunchedsatellitesandbluechipCGItoshowusthetruepersonalityoftheEarth…moredynamicthanit’severbeenseenbefore.Everyminutenewlandisborn,everyhourtonnesofrockarrivefromspace,beforeyougotosleepacloudofdustfromtheSaharawillhavefertilisedtheAmazon,andwhileallthatwashappening,thegroundunderyourfeetmovedhalfametre.AsHannahexplains,Earth’sdailychangesarealllinkedinsurprisingways,and-moreimportantly–wewouldnotbeabletosurviveontheplanetwithoutthem. Westartwiththeinnerearth–theinvisiblebuthugelydynamicsystembeneathourfeetwhichconstantlyrebuildstheplanet’ssurface.OntheislandofStromboli,weclimbavolcanowithgeologistProfessorChrisJacksontoseehowmuchlavaasinglevolcanocanproduceonadailybasisandhowthatlavabuildsnewland.Chrisalsorevealswhatpowerstheinnerearth–radioactivedecaybeneathofourfeet,whereheavyelementsareconstantlydecayingintolighterones–aprocessthatproducestheequivalentenergyof27,000Hiroshimabombseveryday.Thisenergyisacrucialdrivertoplatetectonicsandthereforevolcanicactivity.Andthespeedwithwhichvolcanicactivitymakeslandiscrucial-ifitdidn’tcreatelandfasterthanerosiondestroysit,wewouldhavenolandtoliveonandtheworldwouldbeonegiantocean. Thestorydoesn’tstopwithnewlandbeingmade.It’salsoconstantlybeingmoved.Werevealhowthemoonnotonlycauseshugemovementsofwaterintheocean–whichweknowasthetides-butalsocreateswavesofsolidrockonland,knownassolidearthtides;aceaselessshapechangewhichwenevernotice.WhenamateurdiversRamonandVeronicaLlanezafoundreddustinanunderwatercaveintheBahamas,littledidtheyknowhowfarithadtravelledtogetthere.ScientistCharlieBristowhastrackedthesourceofthedusttotheSaharaandworkedouthowhugequantitiesofsolidmudgetairborneandcarriedacrosstheAtlantic–halfamilliontonnesofitperday!MuchofitendsupintheAmazon,whereithelpsfertilisetherainforest–thelungsoftheplanet.Meanwhile,inthepolarregions,mountainsarealsobeingmoved–byglaciers,whichgrinddownrock24-7andeventuallydeposititintheocean,whereithelpstriggeranotherdailychange–thistimetolife. Intheocean,wefollowthedailygrowthofphytoplankton–microscopicplantlifefuelledbythenutrientsputintotheoceanbyerosion.Fivebilliontonnesofitgroweverydayand,likeallplants,absorbcarbondioxideandreleaseoxygen.Infact,thereissomuchphytoplanktonintheoceanthattheyareresponsibleforeverysecondbreathwetake.Theexplosivegrowthofphytoplanktontriggersanotherglobalchangeandthebiggestmassmovementofanimallifeknowntoscience–thedailymigrationofthezooplankton,whichriseupfromthedepthseverynighttofeedontheplants.InFlorida,wegetunderwaterwithagroupofintrepiddivers,whoplungeintothepitch-blackoceanforachancetoseethisglobalphenomenonupclose.Wealsolookathowscienceisnowabletotrackthegrowthofplantsonlandusingsatellites.Ifyoucouldputallthegrowthinalltheworld’sforestsintooneimaginarytree,youwouldgetasingletreethreekmtallinjustoneday.Butwithallthisgrowth,thereisaninevitableflipside-fire.ThefilmgoesbehindthesceneswiththeUSForestServiceastheytacklethebiggestwildfireinCalifornia’shistory.EverydayanareaofforesttwicethesizeoftheGrandCanyonNationalParkisburntdown. Finally,HannahFrygetsustolookoutwards.TheEarthisnotabubble–it’spartofabiggercosmicsystemthateverydaymesseswiththecompositionofourplanet.Weloseatmosphericgaseslikehydrogenandheliumattherateof1kgpersecondtospace.Andoncethey’regone,they’regone.Infact,whenyoulookattheNorthernLights,you’reactuallylookingatheliumbeinglost.ButEarthdoesgetsomethingbackfromspace.WejoinagroupofamateurastronomerstowatchtheGeminidmeteorshowerinthedesertsofCalifornia.Thisheavenlylightdisplayisactuallyrevealingaprocessthatgoesonallday,everyday.TheEarthisconstantlypickingupspacedust–anestimated60tonnesofitevery24hours.Butperhapsthebiggestchangeofallistheonethatfewofusareevenawareof.Ourwholegalaxyismovingthroughthecosmosattwomillionkmperhour. Itreallyisadifferentplaneteveryday.Ifitweren’t,wewouldn’tbeonit!

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