E-Alaska, isimo sezulu sishintsha sisuka olwandle siye e-subarctic, esiphenduka sibe yi-arctic. Lokhu kubumbe izici zezimo zezulu, ngenxa yalokho ezingaba khona izindawo ezinhlanu zezulu. Kunendawo ebalulekile yasogwini nemithombo emikhulu yamanzi, izintaba nezindawo ze-permafrost.
Indawo yesimo sezulu yasolwandle
Ingxenye eseningizimu yenhlonhlo isendaweni yolwandle yesimo sezulu, ethonywe isimo sezulu sePacific Ocean. Ishintshwa yisimo sezulu sasolwandlekazi esihlanganisa i-Alaska emaphakathi. Ehlobo, isimo sezulu sithonywa yizinkumbi zomoya ezijikeleza zisuka endaweni yoLwandle iBering. Imisinga yomoya yezwekazi iqhuma ebusika.
Kukhona indawo yezinguquko phakathi kwezinhlobo zezulu zezwekazi nezasolwandle. Izimo zezulu ezicacisiwe nazo zakhiwe lapha, ezithintwa yisibalo somoya esiseningizimu nasenyakatho ngezikhathi ezahlukahlukene zonyaka. Isimo sezulu sezwekazi sihlanganisa izindawo ezingaphakathi e-Alaska. Ingxenye esenyakatho nenhlonhlo ilele endaweni enesimo sezulu se-arctic. Le yindawo ye-Arctic Circle.
Ngokuvamile, e-Alaska, izinga eliphezulu lomswakama nemvula yehla isuka ku-3000 mm iye ku-5000 mm ngonyaka, kepha inani labo alilingani. Ngaphezu kwakho konke bawela endaweni yemithambeka yezintaba, futhi okungenani kunabo bonke ogwini olusenyakatho.
Uma sikhuluma ngombuso wamazinga okushisa e-Alaska, ngokwesilinganiso iyahluka kusuka ku- +4 degrees kuye ku- -12 degrees Celsius. Ezinyangeni zasehlobo, izinga lokushisa eliphakeme lama- + 21 degrees liqoshwe lapha. Esifundeni solwandle, kungama-degree angu-15 ehlobo, futhi cishe -6 ebusika.
Isimo sezulu esise-Subarctic sase-Alaska
Izindawo ze-tundra nehlathi-tundra zitholakala kwisimo sezulu esingaphansi komhlaba. Ihlobo lapha lihlala isikhashana, njengoba iqhwa liqala ukuncibilika kuphela ekuqaleni kukaJuni. Ukushisa kuthatha cishe amasonto amathathu kuya kwamane. Kunezinsuku nobusuku obumuncu ngale kwe-Arctic Circle. Eduze nenyakatho yenhlonhlo, inani lemvula lehla laya ku-100 mm ngonyaka. Ebusika, endaweni engaphansi komhlaba, izinga lokushisa lehlela ku -40 degrees. Ubusika buhlala isikhathi eside kakhulu futhi ngalesi sikhathi isimo sezulu siba nzima. Inani elikhulu kakhulu lemvula liwela ehlobo, lapho izinga lokushisa likhuphukela kubukhulu obungu- + 16 degrees. Ngalesi sikhathi, ithonya lemisinga yomoya elinganiselayo liyabonakala lapha.
Inyakatho ekude ye-Alaska neziqhingi ezizungezile kunesimo sezulu se-arctic. Kunezingwadule ezinamadwala ezinomunyu, ubulembu nezinguzunga zeqhwa. Ubusika buhlala cishe unyaka wonke, futhi ngalesi sikhathi izinga lokushisa lehla laya ku -40 degrees. Akukho mvula. Futhi, alikho ihlobo lapha, ngoba ithempelesha ayivamile ukukhuphuka ngaphezu kwama-degree ama-0.
