Ngokuvamile kubalulekile ukucacisa izinga lapho izingxenye ezithile zefu zitholakala khona. Ukukhombisa lelo zinga, kungasetshenziswa imiqondo emibili, leyo ye- I-Altura futhi enye kokuwa.
Ukuphakama kwephoyinti (ngokwesibonelo: isisekelo sefu) ibanga elime mpo phakathi kwezinga lesiza sokubuka kanye nezinga lalelo phuzu. Kumele kuqashelwe ukuthi iphuzu lokubuka lingatholakala egqumeni kuya entabeni. Esikhundleni salokho, ukuphakama kwephoyinti ibanga eliqonde mpo phakathi kwezinga elisho ulwandle nezinga lalelo phuzu. Ababuki bendawo ngokuvamile basebenzisa umqondo wokuphakama. Nokho, izingqapheli zezindiza ngokuvamile zibhekisela ekuphakameni. I- ubukhulu obuqondile yefu ibanga eliqonde mpo phakathi kwezinga lesisekelo salo nesiphezulu salo.
Amafu ngokuvamile atholakala ezindaweni eziphakathi kolwandle nolwandle. Izinga le- ukuyeka kancane iyahlukahluka esikhaleni nesikhathi; ngakho-ke, iziqongo zamafu ziphakeme ezindaweni ezishisayo kunezindawo eziphakathi neziphezulu. Siyakhumbula ukuthi i-tropopause ibingumngcele phakathi kwe-troposphere ne-stratosphere.
Ngomhlangano, ingxenye yomkhathi lapho amafu evame ukwenzeka ihlukaniswe yaba amazinga amathathu abizwa, ngokulandelana, phezulu, okuphakathi nokwehla. Isitezi ngasinye sichazwa ngamazinga wamazinga lapho amafu ezinhlobo ezithile avela kakhulu. Izitezi ziyagqagqana ngandlela thize nemikhawulo yazo iyahlukahluka ngokuphakama.
Njengesibonelo, ku izifunda polar izinga eliphakeme liphakathi kuka-3 no-8 km ngenkathi ezifundeni ze-equatorial leli zinga liphakathi kuka-6 no-18 km.