Yintoni umphumo we-foehn?

Isiphumo se-foehn sinesiphumo sendawo, kodwa siyaziwa kwihlabathi liphela

Kukho iziganeko ezingenakubalwa kwimeteorology ezichaza uninzi lwezinto esingazaziyo namhlanje. Enye yezo zinto esingazi ukuba zisebenza njani zezo meko apho umoya ushushu ngaphezu kwesiqhelo xa kukho umoya wasentshona.

Oku kungenxa yempembelelo ye-foehn. Yinto eyenzekayo xa ubunzima bomoya oshushu nobumanzi bunyanzeliswa ukuba benyuke intaba. Xa umoya wehla kuwo, wenziwa ngumoya omncinci kunye nobushushu obungaphezulu. Ngaba uyafuna ukwazi yonke into malunga nefuthe le-foehn?

Kwenzeka njani ukuba impembelelo yenzeke?

ubunzima bomoya obushushu buyenyuka buye baphulukane nokufuma

E-Spain, xa umoya wasentshona uvuthuza ukusuka kuLwandlekazi lweAtlantic, ubunzima bomoya kufuneka bunqumle iintaba ezininzi. Xa umoya udibana nentaba, kuthanda ukunyuka ukugqithisa loo mqobo. Njengokuba umoya unyuka phezulu, uphulukana nobushushu, kuba i-gradient ye-thermal yendalo esingqongileyo ibangela ukuba njengoko ukuphakama kunyuka, iqondo lobushushu liyancipha. Nje ukuba ifikelele encotsheni yentaba, iqala ukwehla. Njengokuba ubunzima bomoya besihla entabeni, uphulukana nokufuma kwaye unyuse iqondo lobushushu, ngendlela yokuba, xa ufikelela ngaphezulu, iqondo lobushushu liphezulu kunaleyo aqale ngayo ukunyuka intaba.

Oku kubizwa ngokuba yimpembelelo kwaye kwenzeka apha eSpain xa kuvuthuza umoya wasentshona, nangona luphawu phantse lwazo zonke iindawo ezisezintabeni. Xa ubunzima bomoya oshushu bunyuka intaba, iyanda, kuba uxinzelelo luyancipha ngobude. Oku kubangela ukupholisa kwaye ngenxa yoko ukunyuka okuqhubekayo komphunga wamanzi, okhokelela ekukhululweni kobushushu obufihlakeleyo. Isiphumo kukuba umoya okhulayo uphakamisa ukuyilwa kwamafu kunye nemvula. Ubukho bamafu asisigxina (phezulu) yinto eqhelekileyo.

Ngokwesiqhelo umphumo we-foehn unxulunyaniswa nokunyakaza kwe-cyclonic kwaye kwenzeka kuphela xa ujikelezo lomoya lomelele kangangokuba luyakwazi ukunyanzela umoya ukuba udlule ngokupheleleyo kwintaba ngexesha elifutshane.

Umphumo we-foehn emhlabeni jikelele

Impembelelo yeempungutye ibangela ukuba amafu aqokelele ezintabeni

Njengoko kukhankanyiwe ngaphambili, isiphumo sefeh lwenzeka phantse kuzo zonke iindawo ezisezintabeni zehlabathi, nangona isiphumo salo silapha ekuhlaleni. Isiphumo se-foehn sikwenzeka nakwiintlambo. Iziphumo zempembelelo kwintlambo kukuba ziyayigqwetha intuthuzelo yobushushu ngokupheleleyo. Iimeko zeqondo lobushushu emazantsi entlambo zihlala zingenathemba kakhulu. Ngamanye amaxesha ezi zixhomekeke kuqhelaniso, ubunzulu, morphology (nokuba yintlambo yemvelaphi eguqukayo okanye yemvelaphi ye-glacial), njl. Ukongeza kwezi meko zokuma, imeko ezinzileyo yemozulu nayo inefuthe, kuba ziyakwazi ukubangela ukuguquka kobushushu obophula iipatheni zokuziphatha ezifudumeleyo zomoya.

Ke sinokuthi isiphumo se-foehn Iyakwazi ukuguqula kwiiyure nje ezimbalwa ubungakanani bokufuma obusezintlanjeni. Siza kuqhubeka ukubona ukuba zeziphi iziphumo ezithi zibe nefuthe leempungutye kwiindawo ezahlukeneyo zehlabathi.

Isiphumo seFoehn kumantla eAlps

Impembelelo ye-foehn inyusa amaqondo obushushu njengoko umoya uwe

Ithiyori yempembelelo ye-foehn isixelela ukuba xa kuvuthuza umoya ofudumeleyo kwaye uhlangana noluhlu lweentaba, ukuze udlule kuwo, kunyanzelekile ukuba unyuke. Xa oku kusenzeka, umphunga wamanzi ophethwe ngumoya uyaphola kwaye ujiye, uvelise imvula kwicala elingumoya lentaba. Oku kunciphisa bonke ukufuma emoyeni, ngoko ke umoya ophantsi, xa umoya wehla, iba yintlama efudumeleyo enomswakama omncinci kakhulu.

Nangona kunjalo, le ngcamango ayinamsebenzi xa sizama ukuchaza umphumo we-foehn kwiiAlps. Xa isenzeka kwizintaba zealpine, kukho ukwanda kweqondo lobushushu, kodwa ayihambi nemvula esemazantsi ayo. Ingenzeka njani le nto? Inkcazo yale meko ilele kwinto yokuba imimoya eshushu efikelela ezintlanjeni ezisemantla eAlps ayiveli kumathambeka asemazantsi, kodwa ivela kwiindawo eziphakamileyo. Kwezi meko, ngexesha lokunyuka kwayo, ubunzima bomoya obandayo bufikelela kwimeko yozinzo oluthintelayo ekubeni lufikelele encotsheni yomqobo. Kuphela kungenxa yeengxondorha ezinzulu apho lo moya ubandayo uvalekileyo usinga ngasemantla ngohlobo lwempembelelo.

Ngenxa yokuba emantla eAlps kukho ukufuma okuphantsi, le mpembelelo ye-foehn yenza isibhakabhaka esimangalisayo, ikwanyusa inkqubo yokunyibilika ngamaqondo aphezulu obushushu. Isiphumo se-foehn siyakwazi ukuba noxanduva lokwahluka kweqondo lobushushu ukuya kuthi ga kwiidigri ezingama-25 ngosuku lobusika.

Impembelelo ye-North American foehn

Xa umoya oshushu unyuka, ubangela ukwakheka kwamafu kunye nemvula ukuphakama

Xa isiphumo se-foehn sivela kwintshona ye-North America ibizwa ngokuba Chinook. Esi siphumo senzeka ikakhulu kumathafa aseLeeward okanye asempuma eeNtaba zeRocky eUnited States naseCanada. Xa isenzeka le yokugqibela, umoya uvamise ukuvuthuza ujonge ngasentshona nangona ungaguqulwa bubume bendawo. Rhoqo iChinook iqala ukuvuthela ngaphezulu xa iphambili iArctic ibuyela empuma, kwaye ubunzima bolwandle obuguquliweyo bungena buvela ePacific, buvelisa ukwanda okumandla kwiqondo lobushushu. Njengayo nayiphi na enye foehn, Chinook imimoya zifudumele kwaye zomile, zihlala zomelele kwaye ziryt.

Iziphumo zeChinook kukunciphisa ukubanda kobusika, kodwa eyona yomeleleyo linyibilike ikhephu ngeesentimitha ezingama-30 ngeyure nje ezimbalwa.

Isiphumo sikaFoehn kwiiAndes

KwiiAndes (eArgentina) kumoya obangelwa sisiphumo seempungutye ibizwa ngokuba ngumoya kaZonda. Lo moya kaZonda nawo womile kwaye uthuli. Ivela kuMazantsi ePole kwaye emva kokudlula kuLwandlekazi lwePasifiki, iyafudumala emva kokunyuka iinduli zeentaba ngaphezulu kwe-6km ngaphezulu komphakamo wolwandle. Xa udlula kwezi ndawo, UZonda Wind uyakwazi ukudlula kwisantya sama-80 km / h.

Umoya kaZonda uveliswa kukushukuma okumantla mpuma kweeMpuma zePolar, emva koko ubushushu ngenxa yokuhla komhlaba ubheke ezihlanjeni. Yindlela enye yokuwa kwekhephu kwiindawo eziphakamileyo, ezibizwa ngokuba ngumoya omhlophe, ngesantya esifikelela kwi-200 km / h. Lo moya ubalulekile kulo mmandla uyinkqantosi, kwaye unxulunyaniswa nokufumba kwekhephu kwiindawo zomkhenkce. Iziphumo ziyaphela xa umoya obandayo ungena kumantla ntshona kwaye kwenzeka kuphela phakathi kukaMeyi noNovemba.

Iziphumo zeFoehn eSpain

ESpain eminye imimoya ephambili iyaziwa. I-ábrego, umzekelo, ngumoya ovela kumzantsi-ntshona. Ngumoya omnene kwaye ofumileyo. Iyaziwa kakhulu kwiThafa lase-Andalusia, kuba yiyo ethwala imvula, iintloko, ingqele kunye noxinzelelo. Ngumoya wasekwindla nasentwasahlobo ovuthuzayo osisiseko semvula yezolimo, njengoko ingoyena ndoqo wamanzi. Ivela kwiAtlantic, kwindawo ephakathi kweCanary Islands kunye neAzores.

Enye yeziphumo ezibi eziza ne-ábrego kukuba, ngenxa yokufuma kwayo okuphantsi, isasaza imililo. Olu hlobo lomoya lubangelwa yimpembelelo yeempungutye. Kunxweme lwaseCantabrian, i-gobrego ifumana amagama anje ngeViento Sur, Castellano (esuka eCastilla, ke ngoko evela emazantsi), eCampurriano (evela kummandla waseCantabrian waseCampoo) okanye "uAire de Arriba" (osuka eLa Montaña; elona candelo liphezulu ukusuka kwiphondo). Ukuba kuvutha kakhulu, babhekisa kuyo njengendawo ekhuselekileyo, ngelixa u-abrilada wayeza kuba lixesha leentsuku ezimbalwa phantsi kolawulo lomoya.

Kwintshona ye-Asturias, i-gobrego ikwabizwa ngokuba ngumoya we-chestnut, kuba xa uvuthuza ngamandla ngexesha lekwindla ibangela ukuba iziqhamo ziwe.

Umphumo we foehn kunye nezolimo

Impembelelo yeempungutye ivelisa iimpembelelo kwezolimo

Sibonile ukuba isiphumo se-foehn sinokubangela umahluko wobushushu ukuya kuthi ga kuma-25 degrees ebusika. Nangona esi siphumo ikakhulu sasekhaya, imeko yazo kwezolimo yendawo iphezulu kakhulu. Kwiindawo apho kunempembelelo ebonakalayo ye-foehn, ngenxa yokuba umoya unciphisa ukufuma kunye nobushushu buyanda, ezolimo kule ndawo zinyanzeliswa ukuba zilime imvula, kuba ukunkcenkceshela kunganyusa iindleko zokuvelisa kwaye kuphelise ubutyebi bamanzi.

Ukuba sijonga ezolimo eArgentina ngokubanzi, siya kufumanisa ukuba indawo enkulu iphuhliswa njengezolimo ezinemvula, apho iimveliso ezinemfuno eziphantsi zamanzi ziphuhliswa. Ukuhlwayelwa kwengqolowa, iimbotyi zesoya kunye nemfuyo yimizekelo yezolimo zaseArgentina.

EChile, kwinxalenye yayo, sifumana imeko ephezulu kakhulu kwezolimo enkcenkceshelayo. Oku kungenxa yokungafani kweziganeko zempembelelo kwiindawo ezahlukeneyo.

Ungasazi enye yeziganeko zemozulu kunye nokusebenza kwayo ngendlela eneenkcukacha kunye neziphumo zayo. Into eyaziwayo, nangona inefuthe lasekhaya, yaziwa kwihlabathi liphela.


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  1.   UJose Criado Garcia sitsho

    Germán, iintsuku ezimbini:
    Igama lam ndinguPepe Criado kwaye ngaphezulu kweminyaka eli-15, ndagxothwa e-Iberia e-US njengeNtloko yoKwenziwa kweMisebenzi, kuyo yonke iMelika (uMzantsi, uMbindi, uMntla kunye neCaribbean).
    Apho ndakwazi ukwenza ikhosi yeminyaka emithathu e-NOAA, enokulingana nento efana ne "Assistant Meteorology Applied to Aviation" (ngaphezulu okanye ngaphantsi).
    Ngoku, emva kokukhubazeka okubangelwa ngumhlaza ukusukela ngo-2001 (sele ndineminyaka engama-68 ubudala), ndabuyela eMalaga, apho ndivela khona, ngoku ndihlala eTorremolinos.
    Umbutho ongajonganga kwenza nzuzo, umbutho wezenkcubeko waseFlamenco opapasha imagazini minyaka le. Ndibhala inqaku malunga nomoya oxhaphakileyo kunye nemimoya eMalaga, ngakumbi istral kwaye, kuba ifuthe leempungutye lifumaneka kulo moya waseMalaga, ngaphandle kokubandakanya imizobo endiyibone iyimfuneko, ndingathanda ukwazi ukuba ungapapasha ifoto ezo unayo, apho isiphumo seFoehn esele sikhankanyiwe sixatyiswa kakhulu kwaye ndinobuganga bokutsho ngokugqithisileyo.
    Ngokucacileyo ndingabeka umbhali kunye nezichasiso ozibonisileyo kwaye kuyacaca ukuba, xa bendikulungele kwaye ngaphambi kokukushicilela, ndiza kukuthumelela inqaku elipheleleyo nge-imeyile kwaye xa ihleliwe, iikopi ezimbalwa ngeposi.
    Andazi ukuba izakubonakala ilungile na.
    Enkosi kunye nokwanga,
    I-PP iphakanyisiwe

  2.   María sitsho

    Kulungile kusasa,
    Ifoto ayibekileyo kwi "the Foehn effect in the Alps" ayiveli kuloo ndawo, yeyesiqithi seCanary saseLa Palma.