Ko akwai a cikin dutsen tundra iyakacin duniya da dare? Amsar a bayyane yake

A arewacin gefen Turai, Asiya da kuma Amerika mulki tundra. A kudancin yammancin duniya shi ne kawai samu a wasu Antarctic tsibiran. tundra zone lullube tare da arewacin kan iyakar Rasha, wanke da garin kankara Arctic Ocean.

Musamman, kuma mai tsanani halitta zone

A bayyanar shi ne mai duhu, inhospitable da kuma hamada yankunan. Watanni tara na shekara a nan ne Marinjãyi hunturu, tsawo da kuma m stretches iyakacin duniya dare. Kafin zuwa treeless, danda duniya zo da sanyi rage haske da watã. Ƙwauro shimmer guda star. Happy duba rare, shahararre kyau na da Aurora borealis.

A wannan bakarãriya gona, sanyi-daure a cikin mutane da dama, da kuma wani lokacin daruruwan, na zurfin mita, girma rare mosses da lichens m. Just kudu zauna da low-girma shrubs dauki tushen a cikin peaty gona.

Domin amsa tambayar ko akwai a cikin dutsen tundra na iyakacin duniya dare, wajibi ne a fahimci da definition wannan yanayin kasa.

m biome

Mountain tundra, kuma ake magana a kai a matsayin "babban dutse", da ake kira halin yanzu ra'ayi na yanayin kasa a tsaye juna zones. A ƙasa na wannan halitta biome lullube daga snow da kuma kankara zuwa dutsen-bel. Its iyaka yayi dace da iyaka line na gandun daji da kuma wuce ta snowline. Iyakar sauyin yanayi zone - talakawan bazara isotherm + 10 °. Wannan zone ne halin high-tsawo dutsen jeri na sub-Arctic da temperate zones.

Babban bambancin daga mai tsayi tundra na Arctic - mafi kyau gona magudanun ruwa da kuma talakawa ruwa-shigad da ƙasa.

A yanayi na arewacin asashe

Kimiyya bayani na ko akwai a cikin dutsen tundra, iyakacin duniya dare, shi ne sauyin yanayi na yankin. Domin wadannan yankunan halin musamman low zazzabi aka saukar daidai da adiabatic dan tudu ne 1 ° C for kowane 100-200 m tsawo. Ga wani hali hakar ma'adinai tundra korau talakawan iska zazzabi. Ga shi aka mamaye a iska mai karfi, da kuma hasken rana radiation ne halayyar high aiki. A zone halayyar rarefied iska maldistribution m canji na zafi. Snow cover ne rarraba da wadanda ba gaba ɗaya.

Bayyana ko akwai a cikin dutsen tundra na iyakacin duniya dare, kuma za ta taimaka da takamaiman wuri wuri. Wannan halitta sabon abu ya auku a kan dutse yankunan, wanda suke geographically a cikin Arctic Circle. A iyakacin duniya dare ba ya faru idan tsaunuka dake a cikin mafi kudancin yankunan na halitta, wanda yake shi ne muhimmi a cikin wani yanayi. Bayan duk, a cikin wannan yanki da sãɓãwar dare da rana ne guda kamar yadda a cikin yankunan coniferous da deciduous gandun daji. A asali sharadin abin da ya faru na iyakacin duniya dare ne exceptionally m gaban low yanayin zafi. Kuma da kawai dalilin wannan sabon abu ne Gwargwadon latitud, ko da arewa, ko da yake kudancin. Babban abu - matsakaicin nesa daga arewa ko kudu na Arctic Circle sandunan.

Winter: m sanyi da kuma impenetrable duhu

Sort fita ko akwai a cikin dutsen tundra, iyakacin duniya dare, kokarin kafa ta definition da tsawon. Wannan halitta sabon abu ne da ake kira zamani, sa'ad da rana ba ya bayyana a kan sararin sama fiye da wata rana. Wannan shi ne sakamako na son yi kwana na 23.5 ° axis na juyawa na duniya da ecliptic jirgin sama. A guntu lokaci (game da kwana biyu), iyakacin duniya dare yana a latitud na Arctic Circle. Matsakaicin tsawon lokaci na sabon abu - game da watanni shida, wanda shi ne hali na ta Kudu iyakacin duniya.

Iyakacin duniya dare a tundra yana da wani talakawan of 1-2 watanni da kuma daukan wuri a cikin hunturu. Wannan kakar ne sosai matsananci yanayin yanayi. Saboda haka, talakawan zafin jiki a Janairu sa a kusa da -25-35 ° C. Snow-bugawa duwãtsu, permeates da garin kankara iska, in winter duba m. Ko wani m mazauni da dutsen tundra - reindeer - a search na abinci sau da yawa otkochevyvaet kudu. Tã yanayi a wannan matsananci yankin, da kuma na iyakacin duniya dare - wani kalubale ga yanayin da dukan abubuwa masu rai.