官方網站: https://www.bbc.co.uk/programmes/m0001vjc
國家/地區: 英國
語言: 英語
上映日期: 2019-01-22(英國)
片長: 58分鐘
又名: 地球日與夜IMDb: tt13774208
評分: 暫無
在線播放:
劇情簡介:
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,knownas’solidearthtides’;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!
