Isijikelezi-langa sethu uMhlaba besingasoloko sinjalo ngoku. Ngexesha lezigidigidi zeminyaka ukusukela oko uMhlaba wasekwayo, kuye kwakho iziqendu zexesha lomkhenkce, ukuphela, utshintsho, ukubuyela umva, imijikelo, njl. Ayize ilungiswe kwaye izinzile.
Enye yezinto eziguqukileyo nezingakhange zibenjengobu ubomi bethu bonke yipali yomhlaba ebabazekayo. Malunga neminyaka engama-41.000 eyadlulayo, umhlaba ubune polarity eguqulweyo, Oko kukuthi, ipali yasemantla yayingumzantsi kwaye ngokufanayo. Ngaba uyafuna ukwazi ukuba kutheni le nto isenzeka kwaye bayazi njani oososayensi?
Inversion kwipali yemagnethi yoMhlaba
Kuyo yonke imbali yoMhlaba, utshintsho kwiipali zemagneti zenzeke ngokuphindaphindiweyo, zihlala amakhulu amawaka eminyaka. Ukuze bakwazi oku, izazinzulu zixhomekeke kuvavanyo nge iiminerali eziphendula kwisishukumisi semagnethi. Oko kukuthi, ngokuhlalutya ukulungelelaniswa kweemaminerali zemagneti, kunokwenzeka ukuba wazi ukuba zeziphi iipali zemagneti yomhlaba ezazinezigidi zeminyaka eyadlulayo.
Kodwa akusabalulekanga kuphela ukubonisa ukuba iipali zemagneti zomhlaba zitshintshile kwimbali, kodwa kutheni benze njalo. Izazinzulu zifumene Izibane ezinkulu zamatye ezinendawo ezinamatye eziphakama rhoqo kwaye ziwele nzulu kwiplanethi yethu. Ukusebenza kwala matye kunokubangela utshintsho kwiipali zomhlaba kwaye kubangele ukuba badibanise. Ukufumana oku, izazinzulu zisekela izifundo zazo kwimiqondiso eshiywe zezinye iinyikima zomhlaba ezitshabalalisayo.
Phantse kumda wobume boMhlaba kukho ubushushu be-4000 ° C ukuze iliwa eliqinileyo lihambe ngokuthe ngcembe kwizigidi zeminyaka. Ukuhanjiswa kwangoku kwengubo kubangela ukuba amazwekazi ahambe kwaye atshintshe ubume. Ndiyabulela ngentsimbi eyenziweyo kwaye igcinwe kumbindi womhlaba, uMhlaba ugcina amandla awo asikhusela kwimitha yelanga.
Ekuphela kwendlela yokuba izazinzulu zazi eli candelo loMhlaba kukufunda imiqondiso yenyikima eveliswe yinyikima. Ngolwazi lwesantya kunye nokuqina kwamaza enyikima Banokukwazi oko sinako phantsi kweenyawo zethu kunye nolwakhiwo olukhoyo.
Ngaba kukho imodeli entsha yoMhlaba?
Ngale ndlela yokufunda uMhlaba, kunokwaziwa ukuba kukho imimandla emibini emikhulu kwindawo ephezulu yomhlaba apho amaza enyikima ahamba kancinci. Le mimandla ifanelekile ngokwemiqathango ye zichaphazela njani amandla engubo yonke, ukongeza kwimeko indlela engundoqo epholileyo.
Enkosi ku iinyikima ezomeleleyo kumashumi eminyaka akutshanje ezo zenza ukuba kufundwe la maza ahamba ngaphaya komda ophakathi kumbindi nengubo yomhlaba. Uphando lwamva nje kule mimandla ingaphakathi loMhlaba lubonisa ukuba icandelo elisezantsi lesiseko linobunzima obuphezulu (yiyo loo nto indawo esezantsi) kunye nenxalenye ephezulu kakhulu isezantsi. Oku kuphakamisa into ebaluleke kakhulu. Kwaye kukuba izinto ziyanda ngaphezulu, oko kukuthi, zihambela phezulu.
Iingingqi zinokuxinana kancinci ngenxa yokuba zishushu. Njengokuba kunesibalo somoya (esona shushu sithanda ukunyuka), kwenzeka into efanayo ngaphakathi kwengubo kunye nomxholo woMhlaba. Nangona kunjalo, kunokwenzeka ukuba ukwenziwa kweekhemikhali kwamalungu engubo kukuziphatha njengamathontsi avela kwisibane somlilo. Oko kukuthi, kuqala bayafudumeza kwaye ngayo bayaphakama. Xa sele uphakanyisiwe, ngaphandle kokunxibelelana nomxholo woMhlaba, uqala ukuphola kwaye ube mninzi ngakumbi, ngenxa yoko uyehla ubuyele kumbindi.
Ukuziphatha okufana nesibane kwelava kungatshintsha indlela izazinzulu ezichaza ngayo ukukhutshwa kobushushu kumphezulu wangaphakathi. Ukongeza, inokusebenza ngokuchanekileyo ukuba ichaze ukuba kutheni, kwimbali yoMhlaba, iipali zemagnethi zibuyiselwe umva.
Imvelaphi:
Isifundo esipheleleyo: http://www.sciencedirect.com/science/article/pii/S0012821X15000345