Wake waba sebhishi ngosuku olunelanga? Ngosuku olunelanga, kuhlale kunomoya ovunguzayo usuka olwandle uye ezweni elisebhishi. Kungani kuhlale kunomoya ogwini futhi kungani umoya wasolwandle (umoya ovunguzayo usuka olwandle uye ezweni) uvela emini, futhi umoya wasemhlabeni (umoya ovunguzayo usuka ezweni uye olwandle) uvela ebusuku? Kungani amafu ehla ezintabeni ngesikhathi semvula? Kungani umoya uzwakala upholile? Izimpendulo zale mibuzo zihlobene nokushisa okuqondile komhlaba nolwandle, ukwanda, ubuningi , kanye nokudluliselwa kokushisa nge-convection ( ukudluliselwa kokushisa ). Ngokuqonda lesi sihloko kahle nangokufanele, ungaphendula imibuzo engenhla kanye neminye imibuzo ongayibuza kamuva.
Ukudluliselwa kokushisa ngokuqhutshwa komoya kuvame ukwenzeka ezintweni eziqinile noma kusukela ezintweni eziqinile kuya koketshezi (uketshezi kuya ezintweni eziqinile) noma kusukela ezintweni eziqinile kuya kumagesi (amagesi kuya ezintweni eziqinile). Ukudluliselwa kokushisa kwe-Convection kuvame ukwenzeka ezintweni ezimanzi (isib., amanzi) kanye namagesi (isib., umoya).
Ukudluliselwa kokushisa kwe-Convection kuwukudluliselwa kokushisa okuhambisana nokuhamba kwezinto. Ukuze uqonde kangcono ukudluliselwa kokushisa kwe-convection, cabanga ngecala, njengamanzi afudunyezwa ngomlilo. Lapho amanzi esitsheni efudunyezwa ngomlilo, ukushisa kuhamba kusuka emlilweni (izinga lokushisa eliphezulu) kuya esitsheni (izinga lokushisa eliphansi) ngokuqhutshwa kanye nemisebe. Ukushisa bese kuhamba kusuka esitsheni (izinga lokushisa eliphakeme) kuya emanzini aseduze kwesitsha (izinga lokushisa eliphansi) ngokuqhutshwa. Ukushisa okwengeziwe kubangela ukuthi izinga lokushisa lamanzi aseduze kwesitsha likhuphuke. Ukwanda kwezinga lokushisa kubangela ukuthi amanzi ande, kwandise ivolumu yawo. Njengoba ivolumu ikhula, ubuningi bawo buyancipha. Amanzi aseduze nephansi kwesitsha anokushisa okuphezulu kunamanzi angaphezulu kwawo. Ngamanye amazwi, amanzi aseduze nephansi kwesitsha anomthamo omkhulu nobuningi obuphansi, kuyilapho amanzi angaphezulu kwawo enomthamo omncane nobuningi obuphezulu. Umehluko wobuningi ubangela ukuthi amanzi ebusweni besitsha, esinobunzima obukhulu, ahambe phansi kanye namanzi aseduze nephansi kwesitsha, esinobunzima obuncane, ahambe phezulu. Le nqubo yenzeka njalo kuze kube yilapho wonke amanzi angaphakathi enokushisa okufanayo (Uma umfutho womoya ungumoya owodwa, amanzi asesitsheni azophela, abiliswe ekushiseni okungu-100 o C).
Ukwenzeka kwemimoya yasezweni kanye nemimoya yasolwandle kuhilela nokudluliselwa kokushisa ngokuqhutshwa kanye nokuguqulwa komoya. Ukushisa okuqondile komhlaba (ukushisa okuqondile kwento eqinile) kuphansi kunokwamanzi olwandle, ngakho-ke umhlaba ushisa ngokushesha uma ubhekene nokukhanya kwelanga futhi uphola ngokushesha ebusuku. Izwe lishisa ngokushesha, lifudumeza umoya ongaphezulu kwalo (ukudluliselwa kokushisa kusuka ezweni kuya emoyeni ngokuqhutshwa komoya). Izinga lokushisa lomoya elithola ukushisa okwengeziwe liyakhula futhi umoya uyakhula. Ngenxa yalokho, ubuningi bomoya buyancipha. Ngokuphambene nalokho, izinga lokushisa lamanzi olwandle lipholile, ngakho umoya ongaphezu kobuso bolwandle nawo upholile, uma kuqhathaniswa nomoya ongaphezu kobuso bomhlaba. Umoya osezingeni lolwandle ubanda kakhulu, ngakho ubuningi bawo bukhulu kakhulu. Lo mehluko wobuningi bomoya ubangela ukuthi umoya osezingeni lolwandle uye ezweni, usunduze umoya ongaphezu kwawo phezulu. Uma uqhelelene nobuso boMhlaba, kukhiqizwa umoya omncane ngenxa yokwehla kwamandla adonsela phansi oMhlaba. Ngenxa yokuthi inani lomoya liyancipha, ingcindezi yomoya nayo iyancipha. Umoya oshisayo ngaphezu komhlaba ohambela phezulu uyaphola ngoba uma uqhelelene nobuso boMhlaba, umfutho womoya omncane ukhona. Umoya obandayo bese wehla futhi, hhayi ebusweni bomhlaba kodwa ebusweni bolwandle, olunezinga lokushisa elipholile. Le nqubo yenzeka njalo, idala ukugeleza komoya osuka olwandle uye ezweni. Ngamafuphi, umoya oseduze nobuso bolwandle uya ezweni, umoya oseduze nobuso bomhlaba uya phezulu, kanti umoya ongaphezulu kwawo uya olwandle.
Kungani intuthu ihlala ikhuphukela phezulu?
Intuthu ikhuphuka ngoba izinga lokushisa layo liphakeme kunomoya ozungezile. Ngenxa yokuthi izinga lokushisa lentuthu liphakeme, ivolumu yayo iyanda futhi ubuningi bayo buyancipha. Ubuningi obuphansi bentuthu bubangela ukucindezeleka kwentuthu okuphansi uma kuqhathaniswa nokucindezela komoya ozungezile. Umoya ozungezile usunduzela intuthu phezulu.
Kungani amafu ehla ngesikhathi semvula? Ngesikhathi semvula, amafu aqukethe umhwamuko wamanzi omningi, okwandisa ubuningi bawo. Amafu aqukethe umhwamuko wamanzi omningi futhi anobukhulu obukhulu ahla aye endaweni lapho umoya ozungezile unobukhulu obufanayo nobefu.
