Tundra sauyin yanayi. Abin da ya hana ruwa zuwa zuba a cikin tundra ƙasa?

The kalmar "tundra" in Finnish nufin treeless danda tudu. Kuma a zahiri, yana daukan manyan yankunan da Arewa Hemisphere a cikin sub-Arctic latitudes, inda predominates mossy da lichen ciyayi a wani fairly m sauyin yanayi. Space halin da rashin tsayi itatuwa, ko da yake tundra da gandun daji tundra iyaka a kan marmari taiga gandun daji. Kawai kananan perennial ciyawa da shrubs mai rufi sanyi ƙasa short lokaci a lokacin rani.

Saboda babban zumunta zafi da kuma low volatility tasirin ne ke faruwa dausayi a cikin wadannan matsananci filin. Amma abin da ya hana ruwa seeping cikin tundra ƙasa?

sauyin yanayi

A zone lullube kunkuntar tsiri na tundra a arewacin Eurasia da kuma Arewacin Amirka, da kuma bό̍lshie yankunan su ne a Rasha da kuma Canada. A sauyin yanayi ne subarctic da subantarctic. A wani karfi da iska a cikin hunturu da kuma iska yanayin zafi har zuwa -30 °, kuma a lokacin rani kusan kai wa + 5 + 10 ° Celsius, ko da coniferous itatuwa ba su girma.

A dogon ake yin dusar ƙanƙara hunturu da kuma kawai 2-3 mun gwada dumi watanni na shekara da gudummawar da gaskiya cewa tundra shan wahala daga wani ragi na danshi. Low zazzabi yanayin ba da damar da shi zuwa ƙafe, zabolachivaya babbar ƙasa. Winter tundra - shi ne na iyakacin duniya dare, kuma a lokacin rani da rana haskakawa kusan for kwana. Spring da kaka ne bayyanuwar ta bayyanar cututtuka suna suya a guda watan - May, kuma Satumba, bi da bi. Halin da m taro na low snow murfin kuma wannan gaggãwar ya dawo a farkon watan Oktoba.

Halayyar fasali na tundra ƙasa

Features Hard subarctic da subantarctic sauyin yanayi da kuma ƙasa - da cewa shi ne abin da ya hana ruwa seeping cikin tundra gona. Thaws kawai isa ga cewa thawed kawai babba yadudduka na duniya da a kananan zurfin. Permafrost jũya cikin tundra ƙasa a cikin garin kankara dunƙule, da kuma irin wannan jiha ba ya canja.

A cikin hunturu, wannan yankin da dama quite mai yawa snow, amma shi dama a kan hamada filayen wani bakin ciki Layer, tun da mafi yawan tsananin iska ta busa tafi.

Gley kuma m gona da halayyar m da launin toka. ƙasa cover yadudduka da aka sa'an nan thawed tundra, da daskare hankali intermixed tare da juna. Saboda haka, humus, humus da peat saukar zuwa zurfin mita. Tare da wani yawa na danshi da kuma lãka baƙin yumɓu kasa fadama. A cikin lebur filayen da ƙasa a zahiri tanƙwara karkashin nauyi na wani mutumin kokarin tsotse shi a cikin wani lokacin farin ciki morass. Duk da haka peat Layer bai wuce 50 santimita saboda matalauta cover herbaceous shuke-shuke da gansakuka. A m ƙasa dehydrated sassan - kuma wannan Podzols podburs.

Abin da ya hana ruwa zuwa zuba a cikin tundra ƙasa?

Duk da yake da batun ba da cikakken bayyana. Abin da ya hana a ruwa? Yana seeps cikin tundra ƙasa danshi a lokacin rani, ta hanyar da peat matashin kai da kuma samar da wani karfi sanyi fasa. Amma kamar yadda ƙasa freezes a lokacin hunturu zuwa zurfin rabin kilomita kuma a cikin wani gajeren lokaci zuwa dimi ba thawed iyaka Layer juya zahiri dutse-kankara ɓawon burodi zama babban cikas ga ruwa.

Saboda haka, amsar wannan tambaya na abin da ya hana ruwa seeping cikin tundra ƙasa ne sauki da kuma ma'ana: da permafrost ba da damar danshi to seep zurfi da kuma ruwa ne mai tsanani ga irin wannan har kamar yadda ya narke daskararre ƙasa sosai. Kuma m rayuka da neobogretaya tundra na shekaru dubbai.