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E sa tloaelehang ketsahalo ea tlhaho - permafrost

metsi malapeng ha feela ho bokella ea mokelikeli ka empa hape mongobo tiileng. metsi ka thata e bopa thaba, le sekoahelo le glaciers sekhukhu. Sebaka sa ka tlas'a lefatše bokella leqhoa ile ea bitsoang permafrost 1955 Shvetsov - Union permafrost. sebaka sena e na le lebitso le tloaelehileng le sebelisoang malapeng - the permafrost.

Permafrost ke lera ka holimo ea cortex ea. Majoe boemong ena li fapane batang. lera ena e ne e akarelletsa permafrost, majoe, 'me serame-brennan tsa haholo tlase ho lefatshe.

Ha nako e telele haholo mariha matla bapisoa nyane koahela ho na le tahlehelo mohlomong la mocheso ho tloha lefikeng. Tabeng ena, ho na le ke leqhoa a ea botebo ka haholo. Phello ke le boima o tiileng oa metsi. Nakong ea lehlabula, permafrost ha a na nako ea ho ha leqhoa le qhibiliha ka ho feletseng. mobu e lule e le mocheso mpe, kahoo ka botebo e telele, 'me ka makholo le esita le lilemo tse likete. Russia permafrost thehoa le tlas'a tšusumetso e eketsehileng ea mehloli ea tonanahali ea a batang. Ba ipokellela libakeng tse ka tlaase mocheso, ka karolelano.

Bakeng sa nako e telele ka thempereichara e tlaase ke mafika ka tsela e itseng "tiisa" le mongobo. Permafrost se akarelletsa tlas'a lefatše accumulations leqhoa oa mongobo eaba ba etsa wedges, le lilense, streaks, lihlopha tsa leqhoa. Permafrost ka ba le palo e sa tšoaneng ea leqhoa. Pontshi "iciness" ka Range ho tloha 1-3 ho fihlela ho 90%. E le busa, ho na le leqhoa libakeng thabeng. Ka nako e tšoanang le permafrost lithoteng tsa o phahameng leqhoa dikahare.

Permafrost ke ketsahalo e ikhethang. Permafrost bafuputsi thahasello lekholong la bo17 la lilemo. Qalong ea lekholo la bo18 la lilemo ka ketsahalo eo ho builoeng ka mesebetsi ea hae e Tatishchev, le ho ithuta pele tšoaroa ka bohareng ba bo-bo19 Middendorf. Ho qetela o ile a hlokomela bethe mocheso lekanngoa ka libaka tse 'maloa, beha likarolong tse ka leboea ea matla a eona,' me a hakanya ka tšimoloho le lintlha ka ho lekaneng ho atile permafrost oa libaka. Ho tloha halofo ea bobeli ea lekholong la bo19 la mathoasong a lekholo la bo20 la lilemo o ile a qala ho ho phethahatsoa ka diphuputso e pharaletseng ka kopanelo le morolo mesebetsi ea baenjiniere meepo le geologists.

Russia, permafrost atoloswa ho e leng sebaka se ka bang limilione tse leshome le motso km lisekoere. Ho ka etsang liphesente tse mashome a tšeletseng a metso e mehlano ea sebaka seo kaofela tsa mmuso.

Permafrost e felle feela ho tloha boroa ho ea Kola Hloahloeng. Ho tswa ho karolo ea bohlokoa haholo ho matha ka European East thota haufi le Arctic Circle. Joale, ka ho Urals ke ho kheloha ho ea ka boroa likhato hoo e ka bang ho mashome a tšeletseng leboea bolokolohi. Hammoho ob, permafrost fetela le ho tsona ka melomo ea North Sosva ebe e ntse e feta ka maporogo Siberia (matsoapong ka boroa) ho Yenissey ka Stony Tunguska. Mothating ona moeli fellang kateng haholo sharply ho ea ka boroa, ho larileng ka haufi le Yenisei River, lateloa ke le matsoapong a Altai, Tuva, e ka Bophirimela Sayan ho le moeli oa Kazakhstan.

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