英语口语冰岛火山爆发 自动保存的.docx
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英语口语冰岛火山爆发 自动保存的.docx
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英语口语冰岛火山爆发自动保存的
Icelanddisruptivevolcano冰岛火山破坏
Iceland'sdisruptivevolcano
Today,Britishcivilaviationauthoritiesorderedthecountry'sairspaceclosedasofnoon,duetoacloudofashdriftingfromtheeruptingEyjafjallajökullvolcanoinIceland.Thevolcanohaseruptedforthesecondtimeinlessthanamonth,meltingice,shootingsmokeandsteamintotheairandforcinghundredsofpeopletofleerisingfloodwaters.ThevolcanicashhasforcedthecancellationofmanyflightsanddisruptedairtrafficacrossnorthernEurope,strandingthousandsofpassengers.Collectedherearephotosofthemostrecenteruption,andoflastmonth'seruptions,whichwerefromthesamevolcano,justseveralmilesfurthereast.(17photostotal)
SmokebillowsfromaneruptingvolcanowhichseemstobeclosetothetopoftheEyjafjallaglacieronApril14,2010nearReykjavik.AllLondonflights,includingthosefromHeathrow,willbesuspendedfromnoon(1100GMT)todayduetovolcanicashfromIcelandthathasalreadycausedalmost300cancellationshere,officialssaid.(AFP/GettyImages)
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AnaerialhandoutphotofromtheIcelandicCoastGuardshowsfloodcausedbyavolcaniceruptionatEyjafjallaGlacierinsouthernIcelandApril14,2010.ThevolcaniceruptiononWednesdaypartiallymeltedaglacier,settingoffamajorfloodthatthreatenedtodamageroadsandbridgesandforcinghundredstoevacuatefromathinlypopulatedarea.PicturetakenApril14,2010.(REUTERS/IcelandicCoastGuard/ArniSaeberg)#
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MeltingicecausedbyavolcaniceruptionatEyjafjallaGlacierinsouthernIcelandApril14,2010.(REUTERS/IcelandicCoastGuard/ArniSaeberg)#
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PhototakenonApril14,2010theMarkarfljotglacialriver,westoftheEyjafjallaglacier.Iceland'ssecondvolcanoeruptioninlessthanamonthmeltedpartofaglacierandcausedheavyfloodingonApril14,forcingupto800peopletoevacuateandgroundingsomeflightsoverNorway.(HALLDORKOLBEINS/AFP/GettyImages)#
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FloodingcausedbyavolcaniceruptionatEyjafjallaGlacierinsouthernIcelandApril14,2010.(REUTERS/IcelandicCoastGuard/ArniSaeberg)#
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AmantakesapictureofaroadthathasbeenwashedawaybyfloodwaterfollowingthemeltingoftheEyjafjallaglacierduetotheeruptionofavolcanoonApril14,2010nearReykjavik.(HALLDORKOLBEINS/AFP/GettyImages)#
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InthisWednesdayApril14,2010photograph,smokeandsteamareseenrisingfromthevolcanoundertheEyjafjallaglacierinIceland,whicheruptedforthesecondtimeinlessthanamonth,meltingice,shootingsmokeandsteamintotheairandforcinghundredsofpeopletofleerisingfloodwaters.(APPhoto/IcelandicCoastguard)#
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Anatural-colorsatelliteimageshowslavafountains,lavaflows,avolcanicplume,andsteamfromvaporizedsnow.TheimagewasacquiredonMarch24,2010,bytheAdvancedLandImager(ALI)aboardNASA'sEarthObserving-1(EO-1)satellite.Thelavafountainsareorange-red,barelyvisibleatthe10-meter(33-foot)resolutionofthesatellite.Thescoriaconessurroundingthefissureareblack,asisthelavaflowextendingtothenortheast.Whitevolcanicgasesescapefromtheventanderuptinglava,whileasteamplumeriseswherethehotlavameetssnow.(Thebrightgreencoloralongtheedgeofthelavaflowisanartifactofthesensor.)(NASA'sEarthObservatory/RobertSimmon)#
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ThispicturetakenonMarch27,2010showslavaspurtingoutofthesiteofavolcaniceruptionattheEyjafjallajökullvolcanosome125kmeastofReykjavik.Withlavastillgushing,asmallIcelandicvolcanothatinitiallysenthundredsfleeingfromtheirhomesisturningintoaboonfortheislandnation'stourismindustry,asvisitorsflocktocatchaglimpseoftheeruption.
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TouristsgathertowatchlavaspurtoutofthesiteofavolcaniceruptionattheEyjafjallajökullvolcanoonMarch27,2010.Upto800peoplewereevacuatedinIcelandearlyonApril14,2010duetoavolcanoeruptionundertheEyjafjallajokullglacierinthesouthoftheisland,policeandgeophysicistssaid.
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PeoplegathertowatchlavaflowatthesiteofavolcaniceruptionattheEyjafjallajökullvolcanoneartheEyjafjallaglacieronMarch27,2010.#
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HeatshimmersabovelavaflowingfromtheEyjafjallajökullvolcanoinIcelandonMarch28th,2010.Originalhere.(
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LavaspewsoutofamountainonMarch21,2010intheregionoftheEyjafjallaglacierinIceland
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LavaspurtsoutofthesiteofavolcaniceruptionattheEyjafjallajökullvolcanoneartheEyjafjallaglacierinIcelandonMarch27,2010
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SmokeandsteamhangoverthevolcanoundertheEyjafjallaglacierinIceland,earlyThursdayApril15,2010.
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LavaspewsoutofamountainonMarch21,2010inHvolsvöllurintheregionoftheEyjafjallaglacierinIceland.
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SteamandhotgasesriseabovelavaflowingfromtheEyjafjallajökullvolcanoonApril3rd,2010.Originalhere.(UlrichLatzenhofer/CCBY-SA)#
The2010eruptionsofEyjafjallajökull(埃亚菲亚德拉火山)[ɛɪjaˌfjatl̥aˌjœkʏtl̥]areatimelineofvolcaniceventsatEyjafjöllinIcelandwhich,althoughrelativelysmallforvolcaniceruptions(爆发),causedenormousdisruptiontoairtravelacrosswesternandnorthernEuropeoveraninitialperiodofsixdaysinApril2010.AdditionallocaliseddisruptioncontinuedintoMay2010.TheeruptionwasdeclaredofficiallyoverinOctober2010,whensnowontheglacierdidnotmelt.
Beginningon14 April2010,theeruptionenteredasecondphaseandcreatedanashcloudthatledtotheclosure(结束)ofmostofEurope'sIFRairspacefrom15until20 April2010.Consequently,averyhighproportionofflightswithin,to,andfromEuropewerecancelled,creatingthehighestlevelofairtraveldisruptionsincetheSecondWorldWar.
Thesecondphaseoftheeruptionstartedon14 April2010andresultedinanestimated250millioncubicmetresofejectedtephra(喷出的火山灰).Theashplumerosetoaheightofapproximately9 kilometres,whichratestheexplosive(爆炸性的)poweroftheeruptionasa4ontheVolcanicExplosivityIndex.(火山爆炸性指数)。
Background
Eyjafjallajökull(pronounced [ˈɛɪjaˌfjatl̥aˌjœkʏtl̥] isoneoftheIceland'ssmallericecapslocatedinthefarsouthoftheisland.It'ssituatedtothenorthofSkógarandtothewestofthelargericecapMýrdalsjökull.
Theicecapcoversthecalderaofavolcano1,666 metres(5,466 ft)inheightthathaseruptedrelativelyfrequentlysincethelasticeage.Themostrecentmajoreruptionsoccurredin1921,1612(believedtohavelastedonlythreedays)andfrom1821to1823.[6]PreviouseruptionsofEyjafjallajökullhavebeenfollowedbyeruptionsatitslargerneighbour,Katla;.[7]On20 April2010IcelandicPresidentÓlafurGrímssonsaidthat,"thetimeforKatlatoeruptiscomingclose...we[Iceland]haveprepared...itishightimeforEuropeangovernmentsandairlineauthoritiesallovertheworldtostartplanningfortheeventualKatlaeruption".[8]
ThevolcaniceventsstartinginMarch2010areconsideredtobeasingleeruptiondividedintodifferentphases.Thefirsteruptionphaseejectedolivinebasalticandesitelava[9]severalhundredmetresintotheairinwhatisknownasaneffusiveeruption.Ashejectionfromthisphaseoftheeruptionissmall,risingtonomorethan4 kilometres(2.5 mi)intotheatmosphere.
On14April2010,however,theeruptionenteredanexplosivephaseandejectedfine,glass-richashtoover8 kilometres(5.0 mi)intotheatmosphere.ThesecondphaseisestimatedtobeaVEI4eruption,whichislarge,butnotnearlythemostpowerfuleruptionpossiblebyvolcanicstandards.Bywayofcomparison,theMountSt.Helenseruptionof1980wasratedas5ontheVEI,andthe1991eruptionofMountPinatubowasratedasa6.[citationneeded]
Whatmadethisvolcanicactivitysodisruptivetoairtravelwasthecombinationofthefollowingfourfactors:
[citationneeded]
1.Thevolcano'slocationisdirectlyunderthejetstream
2.Thedirectionofthejetstreamwasunusuallystableatthetimeoftheeruption'ssecondphase,maintainingacontinuoussouth-easterlyheading
3.Theseconderuptivephasetookplaceunder200 m(660 ft)ofglacialice.Theresultingmeltwaterflowedbackintotheeruptingvolcanowhichcreatedtwospecificphenomena:
1.Therapidlyvapourisingwatersignificantlyincreasedtheeruption'sexplosivepower
2.Theeruptinglavacooledveryrapidly,whichcreatedacloudofhighlyabrasive,glass-richash,thiscausedalargeamountofflightstobecancelledintheU.K.
4.Thevolcano'sexplosivepowerwassufficienttoinjectashdirectlyintotheJetStream.
Withoutthespecificcombinationoftheabovefactors,theeruptionofEyjafjallajökullwouldhavebeenamediumsized,somewhatnon-descripteruptionthatwouldhavebeenoflittleinteresttothoseoutsidethescientificcommunityorthoselivingintheimmediatevicinity.[citationneeded]However,theabovefactorswerepreciselythoserequiredforthejetstreamtocarrytheashdirectlyovernorthernEuropeintosomeofthebusiestairspaceintheworld.
Evacuations
About500farmersandtheirfamiliesfromtheareasofFljótshlíð,Eyjafjöll,andLandeyjarwereevacuatedovernight(includingagroupof30schoolchildrenandtheir3teachers[19][20]fromCaistorGrammarSchoolinEngland),andflightstoandfromReykjavíkandKeflavíkInternationalAirportwerepostponed,butontheeveningof21 March,domesticandinternationalairtrafficwasallowedagain.[21][22][23]InhabitantsoftheriskzoneofFljótshlíð,Eyjafjöll,andLandeyjarareawereallowedtoreturntotheirfarmsandhomesafteraneveningmeetingwiththeCivilProtectionDepartmenton22 Marchandtheevacuationplanwastemporarilydismissed.Instead,thepoliceclosedtheroadtoÞór
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