
atlaantik multidecadal aandolanangal

atlaantik multidecadal variability (amv) ennum ariyappedunna atlaantik multidecadal oosileshan (amo), niravadhi pathittaandukalude samayaparidhiyil vadakkan atlaantik samudrathinte samudra uparithala thaapanilayude (sst) sidhaanthaparamaaya vyathiyaanamaan.
modalukalilum charitraparamaaya nireekshanangalilum eee reethikk chila pinthunayundengilum, athinte amplitude, ithinu oru saadhaarana timescale undo ennum athine oru aandolanamaayi tharamthirikkanaakumo ennathinekkurichum vivaadam nilanilkkunnu. samudra uparithala thaapanilayile maattam prakrithidatthamo naravamshajanyamo aaya kaaranangalal, prathyekichu chuzhalikkaatt vikasanathinu pradhaanamaaya ushnamekhalaa atlaantik pradeshangalil, undakunnathinekkurichum charchayundu. atlaantik multidecadal aandolanavum chuzhalikkaatt pravartthanangalile mattangal, mazhayude reethikal, theevratha, malsyangalude ennathile mattangal ennivayumaayi bandhappettirikkunnu.
nirvachanavum charithravum.
vadakkan atlaantik kendreekarichu multidecadal kalavastha aandolanathinulla thelivukal 1980-kalil folland sahapravarthakarum nadatthiya pravarthanangalil ninnu puratthuvaraan thudangi. 2.dii.eiii. 1994ll shlesingerinteyum ramankutty eaka shradhaakendramaayirunnu aaa aandolanamenkilum yadhaartha padam atlaantik multidecadal aandolanamaanu (amo) 2000ll richard kerumaayulla telephone abhimukhathil maikkal maan srishtichathu. 30 inn dhaa hockey stikku aandu dhaa klaimat wars dispaachukal phram dhaa frond lines (2012).
eathenkilum rekheeya pravanatha neekkam cheythukazhinjaal vadakkan atlaantikkile ezz. ezz. tii vyathiyaanathinte paattenukalil ninnaan amo signal saadhaaranayaayi nirvachikkappedunnathu. harithagriha vaathakathinte falamaayi aagolathaapanathinte swaadheenam vishakalanathilninn neekkam cheyyaanaan eee thadassam. ennirunnaalum, aagolathapana signal ganyamaayi samayakramathil noonn-leanier aanenkil (i.iii. sugamamaya oru rekheeya vardhanavu mathramalla), nirbandhitha signalile vyathiyanangal amo nirvachanathilekku chornnolikkum. thathfalamaayi, amo soochikayumaayulla parasparabandham aagolathaapanathinte prathyaaghaathangal marachuvechekkaam, maan, stainmaan, miller ennivar parayunnathanusarichu, ithu shaasthra vikasanathinte kooduthal vishadamaaya charithravum nalkunnu.
amo soochika.
vadakkan atlaantik ezz. ezz. tii. yill aagola pravanathayum ell nino-sathen oosileshan (enso) swaadheenavum neekkam cheiyunnathinu niravadhi reethikal nirddeshikkappettittund. trenberth shia, vadakkan atlaantikkil aagola balaprayogathinte prabhavam aagola samudrathinu samaanamaanenn karuthukayum, parishkaricha amo soochika labhikkunnathin vadakkan atlaantik sstl ninnu aagola (60°enn-60°seey) sharashari sst kuraykkunnu.
ting "thudangiyava."ennirunnaalum nirbandhitha ezz. ezz. tii paatten aagolathalathil ekeekrithamallennu vaadikkunnu; signal tuu noys upayogichu nirbandhithavum aantharikamaayi srishtikkappettathumaaya vyathiyaanathe avaa verthirichu.
vaan oldenborg "thudangiyava."aagola sharashari thaapanilayile regression mainus cheiyunnathinu, adhika-ushnamekhalaa vadakkan atlaantik samudrathil (ushnamekhalaa akshaamshathil kooduthalulla ensoyude swaadheenam neekkam cheiyunnathinaayi) ezz. ezz. tii sharashari enna nilayil oru amo soochika uruthirinju.
avasheshikkunna vadakkan atlaantik sstl oru eof vishakalanam prayogikkunnathinu munbu gwan nigam nischalamallaattha aagola pravanathayum pasaphik prakrithiparamaaya vyathiyaanavum neekkam cheythu.
irupathaam noottaandinte avasaanathile vadakkan atlaantik ezz. ezz. tii. aswaabhaavikatha baahyamaayi nirbandhitha gadakavum aantharikamaayi srishtikkappetta vyathiyaanavum thammil thulyamaayi vibhajikkappettirikkunnum nilavile kodumudi irupathaam noottaandinte madhyabhaagathinu samaanamaanennum, ithinu vipareethamaayi mattu reethishaasthram soochippikkunnathu irupathaam noottaandinte avasaanathile vadakkan atlaantik aswaabhaavikathayude valiyoru bhagam baahyamaayi nirbandhithamaanennu soochippikkunnu.
frajka-vilyams thudangiyavar. upadhruva gairinte thanuppikkalile sameepakaala mattangal, uposhnamekhalaa pradeshangalile choodulla thaapanila, ushnamekhalaa pradeshangalile thanutha vairudhyangal enniva samudra uparithala thaapanilayile meridian gradientinte speshyal vitharanam vardhippichathaayi 2017 choondikkaatti, ithu amo soochikayil ulppeduthiyitla.
samvidaanangal.
ekadesham 150 varshathe upakarana recordine adisthaanamaakki ekadesham 70 varshathe ardha-kaalayalav, sii. eiii. kku idayil kurachu vyathyasthamaaya choodulla gattangal. 1930-1965 umm 1995 nuu sheshavum, 1900-1930 num 1965-1995 num idayil thanuthathaayi thiricharinjittundu.
modalukalil, amo polulla vyathiyaanam termohalin rakthachamkramanathinte vadakkan atlaantik shaakhayile cheria mattangalumaayi bandhappettirikkunnu. ennirunnaalum, uthbhavicha amo soochikaye innathe rakthachamkramana vaikalyangalumayi bandhappedutthaan charitraparamaaya samudra nireekshanangal paryaapthamalla. model, nireekshanangal enniva soochippikkunnathu meghangal, anthareeksha podi, uparithala thapapravaaham ennivayil mattangal varuthunna anthareeksha rakthachamkramanathile mattangal amoyude ushnamekhalaa bhaagathinu pradhaanamaayum kaaranamaakunnu ennaanu.
vadakkan atlaantik sstsumaayi baahya sakthikal engane bandhappettirikkunnu ennathinu atlaantik multidecadal oosileshan (amo) pradhaanamaan.
lokamembaadumulla kalavastha prathyaaghaathangal.
vadakkan ardhagolathinte bhooribhaagatheyum vaayuvinte thapanilayum mazhayum, prathyekichu vadakke americayileyum europileyum venalkkaala kaalaavasthayumaayi amo parasparabandhithamaan. anthareeksha rakthachamkramanathile maattangaliloode, alps, himanikal ennivayil vasanthakala manjuveezhchaye niyantrikkaanum amoic kazhiyum. vadakkukizhakkan brazilian, aafrikkan sahelukalil mazhayude reethikale badhikkunnu. vadakke american varalchayude aavruthiyile mattangalumaayi ithu bandhappettirikkunnu, ithu kadutha atlaantik chuzhalikkaatt pravartthanangalude aavruthiyilum prathifalikkunnu.
american aikyanaadukalile madhya padinjaaran, thekkupadinjaaran bhaagangalil munkaalangalil valia varalchayundayathumaayi amo bandhappettirikkunnave sameepakaala gaveshanangal soochippikkunnu. amo athinte choodulla ghattathilaayirikkumbol, eee varalcha kooduthal pathivo neendunilkkunnatho aayirikkum. irupathaam noottaandile ettavum kadinamaaya rund varalchakal 1925num 1965num idayil positteev amo samayat sambhavichu 1930kalile podi pathravum 1950kalile varalchayum. florida pasaphik vadakkupadinjaarum nere vipareethamaanu-choodulla amo, kooduthal mazha.
amoyude oru choodulla ghattam indiayilum sahelilum venalkkaala mazhaye shakthippeduthunnu, vadakkan atlaantik ushnamekhalaa chuzhalikkaatt pravartthanatthe shakthippeduthunnu ennu kalavastha maathrkakal soochippikkunnu. kazhinja 3,000 varshamaayi sahelil amo wormfaceil vardhicha mazha, thanutha ghattathil kuranja mazha-eee paatten paleoclimatological padanangal sthireekarichu.
atlaantik chuzhalikkattukalumaayi bandhappettirikkunnu.
2008-leeii oru patanam atlaantik multidecadal modine (eiii. emm. emm) hurdend daattayumaayi (<aii. dii. 1>) bandhappettirikkunnu, koodaathe cheria chuzhalikkaattukalude (kattagari 1,2) oru positteev leanier trend shradhikkukayum cheythu, ennaal rachayithakkal avarude model krameekarichappol neekkam cheythu."kalavastha shaasthram poornnamaayum pariganikkumbol, kadinamaaya chuzhalikkattukalaayi parinamikkaan kazhiyunna ushnamekhalaa kodunkaattukalude ennam amoyude choodulla ghattangalil thanutha ghattangale apekshichu valare kooduthalaanu, kuranjathu erattiyengilum; amo kadinamaaya atlaantik chuzhalikkaattukalude aavruthiyilaanu prathifalikkunnathu. amoyude negatteevu, positteev ghattangalude saadhaarana kaalayalav adisthaanamaakki, nilavile ooshmala bharanam kuranjathu 2015 vareyum orupakshe 2035 vareyum thudarumennu prathekshikkunnu."2020ll oru kodumudiyayi karuthuka.
ennirunnaalum, "tropic atlaantik choodinteyum ushnamekhalaa chuzhalikkaatt pravarthanangaludeyum deerghakaala pravanathakalkk naravamshajanya gadakangalaanu kaaranamenn" 2006 ll maanum immanuvalum kandethiyirunnu."
2014-ll maan, stainmaan, miller ennivar choodu vardhikkunnathu (athinaal chuzhalikkaattukalil enthengilum prathyaaghaathangal) amo moolamallennu kaanichu, ezhuthi "aantharika vyathiyaanam kanakkakkaan munkaala padanangalil upayogicha chila nadapadikramangal, prathyekichu," atlaantik multidecadal oosileshan "allengil" amo "ennu vilikkunna oru aantharika multidecadal oosileshan, athu oru munganana ariyappedumbol yadhaartha aantharika vyathiyaanathe verthirikkunnathil paraajayappedunnu. atharam nadapadikramangal oru valarnna amplitude pakshapatha gattavumulla oru amo signal nalkunnu, ithu sameepakaalathe chila enh sharashari thaapanila vardhanavinu amo kaaranamaakunnu. pakaram, yadhaartha amo signal sameepa dashakangalil thanuppikkal ghattathilaayirunnuvennu thonnunnu, ithu naravamshajanya thaapanathe chilathilekku maattunnu."
1995 muthal, 1995,1996,1998,1999,2003,2004,2005,2010,2017,2020 ennee patthu atlaantik chuzhalikkaatt seasonukal sanjaricha chuzhalikkaatt oorjjathaal "angeyattam sajeevamaayi" kanakkaakkappedunnu. 
amo shifttukalude aanukalikathayum pravachanavum.
parambaraagatha stattistikkal sameepanagalkk valare kurachu saambilukalulla upakarana daattaye adisthaanamaakkiyulla ekadesham 130-150 varshathe daatta maathrameyulloo. multy-senchwari proxy punarnirmmaanatthinte sahaayathode, 424 varshathe dairkhyameriya kaalayalav enfield sidu-serano avarude prabandhatthil vivarichirikkunnathu "kalavastha apakadasaadhyathayude probabilistik projection" enna sameepanathinte thithreekaranamaayi upayogichu. gray muthalaayavayude anchu punar sample cheythathum minusamarnnathumaaya pathippil ninnu seero crossing edavelakalude histograam. (2004) soochikayum histograamumaayi poruthappedunna paramavadhi saadhyatha kanakkaakkunna gaama vitharanavum chernnu rejiment edavelayude ettavum valia aavruthi ekadesham 10-20 varshamaanennu kaanichu. 20 varshamo athil kuravo ulla ellah edavelakalkkum motham saadhyatha ekadesham 70 shathamaanamaayirunnu.
amo eppol maarum ennathinekkurichu oru nirnnayaka ardhathilum pravachikkanaavilla. ell nino pravachikkunnathupollu computer modalukalkk ithu cheyyaan kazhiyunnath valare akaleyaan. charitraparamaaya vyathiyaanam nilanilkkunnuvennu karuthikkond bhaaviyile oru nischitha samayaparidikkullil amoyil maattam sambhavikkanulla saadhyatha enfield sahapravarthakarum kanakkaakkiyittund. jala maanejment polulla kalavastha sensitiivu aaplikkeshanukalil deerghakaala aasoothranathinu itharathilulla saadhyathayulla pravachanangal upayogapradamaanennu theliyikkaam.
2014 muthal thudarchayaaya thanuppikkal maattam 2017 leeii oru patanam pravachikkunnu, rachayithakkal shradhikkunnu..atlaantikkile avasaanathe thanutha kaalaghattatthil ninnu vyathyasthamayi, atlaantikkile samudra uparithala thaapanilayile vairudhyangalude speshyal paatten orepole thanuthathalla, pakaram upadhruva geyaril vairudhyamulla thanutha thaapanila, uposhnamekhalayile choodulla thaapanila, ushnamekhalaa mekhalayile thanutha vairudhyangal ennivayundu. amo soochika moolyam prathinidheekarikkaathathum ennaal vardhichuvarunna anthareeksha baroclinisiticum kodunkaattinum kaaranamaayekkaavunnathumaaya ezz. ezz. tii. esile upadhruvathe uposhnamekhalaa meritional gradiantilekku apaakathakalude tripol paatten vardhippichu."
2021ll maikkal maan nadatthiya oru padanatthil, kazhinja sahasraabdathile amoyude kaalaanusrithatha agniparvvatha spodanangalum mattu baahya shakthikalum moolamaanennu kaanichu, athinaal amo oru aandolanamo chakramo aanennathin sakthamaaya thelivukalonnumilla. ell nino thekkan aandolanathekkaal dairkhyameriya samaya skeyilukalile modalukalil andolana swabhaavathinte abhaavavumundaayirunnu; oru modalil aandolanangal undo ennu parishodhikkunnathinulla oru saadhaarana shoonya sidhaanthamaaya chuvanna shabdathil ninnu amvi verthirichariyaan kazhiyilla.

