Isimo sezulu sase-Antarctica sinzima ngenxa yendawo esezindaweni eziphakeme zezwekazi. Akuvamile ukuthi izinga lokushisa lomoya likhuphuke ngaphezu kuka-0 degrees Celsius ezwenikazi. I-Antarctica imbozwe ngokuphelele izinguzunga zeqhwa ezijiyile. Izwekazi lingaphansi kwethonya lomoya obandayo, okungumoya wasentshonalanga. Ngokuvamile, izimo zezulu zezwekazi zome futhi zimbi.
Indawo yesimo sezulu se-Antarctic
Cishe yonke indawo yezwekazi itholakala endaweni yesimo sezulu se-Antarctic. Ubukhulu bekhava yeqhwa budlula amamitha ayizinkulungwane ezingama-4500, lapho i-Antarctica ibhekwa njengezwekazi eliphakeme kakhulu eMhlabeni. Ngaphezu kwe-90% yemisebe yelanga ibonakala kusuka eqhweni, ngakho-ke izwe alifudumali. Akukho mvula, futhi akukho ngaphezu kwe-250 mm yemvula ngonyaka. Isilinganiso sokushisa sasemini ngu -32 degrees, nobusuku -64. Ubuncane bezinga lokushisa lilungiswe ku- -89 degrees. Umoya onamandla uhamba phezu kwezwekazi ngesivinini esikhulu, uyanda ogwini.
Isimo sezulu esingaphansi komhlaba
Isimo sezulu sohlobo lwe-subantarctic sivamile engxenyeni esenyakatho yezwekazi. Ukuthambekela kokuthamba kwezimo zezulu kuyabonakala lapha. Imvula lapha iphindwe kabili, kepha ayidluli isilinganiso sonyaka esingu-500 mm. Ehlobo, izinga lokushisa lomoya likhuphuka kancane ngaphezu kuka-0 degrees. Kule ndawo, iqhwa lincane kancane futhi ukukhululeka kuphenduka indawo enamadwala embozwe ulele nobulembu. Kepha ithonya lesimo sezulu sezwekazi i-Arctic libalulekile. Ngakho-ke, kunemimoya enamandla nesithwathwa. Izimo zezulu ezinjalo azifanele impilo yomuntu.
Ama-oases ase-Antarctic
Ogwini loLwandle i-Arctic, kuye kwehluka ezimweni zezulu zezwekazi. Lezi zindawo zibizwa ngokuthi ama-Antarctic oases. Isilinganiso sokushisa sehlobo singama- + 4 degrees Celsius. Izingxenye zezwekazi azimboziwe yiqhwa. Ngokuvamile, inani lama-oases anjalo leqe i-0.3% yendawo ephelele yezwekazi. Lapha ungathola amachibi ase-Antarctic namachibi anamazinga anosawoti aphezulu. Enye yama-oase okuqala avulekile e-Antarctic kwakuyi-Dry Valleys.
I-Antarctica inezimo zezulu ezihlukile njengoba itholakala eSouth Pole of the Earth. Kunezindawo ezimbili zesimo sezulu - i-Antarctic ne-Subantarctic, ezihlukaniswa yizimo zezulu ezinzima kakhulu, lapho kungekho khona uhlaza, kepha kunezinhlobo ezithile zezilwane nezinyoni ezihlala khona.
