Mafi ƙarancin zafin jiki da aka taɓa rubutawa a duniya

AntarcticaTemps_1957-2006_570x375_scaled_cropp

Antarctica, nahiya mafi sanyi a doron ƙasa

Kowace shekara, idan lokacin sanyi ya zo, akwai mutanen da ke jin daɗin hunturu, dusar ƙanƙara, amma akwai wasu da ke shan wahala da korafi game da ƙarancin yanayin zafi. Mafita daya ita ce ta'azantar da kanka ta hanyar tunanin cewa akwai wasu wurare inda yanayin zafi ya fi sanyi.

Yankin Arewa Maso Gabas mafi sanadin zama a duniya Siberia, inda yanayin zafi a biranen Verkhoyansk da Oimekon ya sauka zuwa 67,8 ° C ƙasa da sifili a 1892 da 1933 bi da bi. Kuma har zuwa lokacin da karatun ƙarshe ya gudana, rikodin ya kasance 89,2 ° C a ƙasa da sifili, an yi rijista a cikin tushen kimiyya na Rasha na Vostok a cikin Antarctica wannan a cikin 1983.

Amma, a halin yanzu, menene wuri mafi sanyi a duniya? Wuri mafi sanyi a saman duniyar yana cikin tsaunin tsaunukan Antarctic a gabashin yankin Antarctic inda yanayin zafi zai iya kaiwa ƙimar da ke ƙasa da 92ºC ƙasa da sifili a cikin dare mai sanyi.

Wasu gungun masana kimiyya sun gano wannan wurin ta hanyar nazarin taswirar yanayin zafin duniya wanda aka samu har zuwa yau, wanda aka kirkira tare da bayanai daga tauraron dan adam masu hango nesa kamar Landsat 8 (na NASA da USGS).

Masu binciken sun binciko bayanan da aka samo daga tauraron dan adam a cikin shekaru 32. Sun gano cewa a cikin lamura da dama rikodin yanayin sanyin mafi yawa an samo shi a jerin maki tsakanin tsaunukan tsaunukan Antarctic na, kololuwa biyu da ke kan yankin da ake kira Plateau Antarctic Plateau. Sabon rikodin ya kai 10 ga Agusta, 2010, wanda ya kai darajar 93,2 valuesC a kasa sifili.

http://www.youtube.com/watch?v=HMCSyD4jVoc

An riga an yi zargin cewa wannan tsaunin tsaunin Antarctic na iya kaiwa yanayin zafi ƙasa da na Vostok saboda tsayinta, amma daga ƙarshe, godiya ga firikwensin Landsat 8, cewa zai yiwu a yi nazarin wannan yanki daki-daki kuma a ƙayyade ƙimominsa.

Hanyar neman amsa ga tambayar, menene yanayin zafin jiki mafi sanyi da za'a iya kaiwa duniya kuma me yasa? Ya fara ne lokacin da wasu masu bincike ke nazarin ƙaura da manyan dunes na dusar ƙanƙara a gabashin yankin Antarctic. Lokacin da masana kimiyya suka kara bayani dalla-dalla, sai suka lura da fashewar dusar kankara tsakanin dunes, watakila an halicce su ne lokacin da yanayin zafi ya yi kasa sosai ta yadda saman dusar kankara ya nutse.

A cikin wannan yankin tuni akwai yanayin zafi mai tsananin gaske wanda ya fi faduwa idan sama ta bayyana. Idan sama ta kasance a sarari na kwanaki da yawa, zafin zafin ƙasa ya sake sauka, ya bar sauran zafin ya tsere. Ta wannan hanyar, an samar da wani layin iska mai tsananin sanyi a kan dusar kankara da kankara, wanda ya fi iska a sama, yana gangaren gangaren tsaunukan tsaunukan Antarctic na gabas da shiga cikin kankara, kuma ta wannan hanyar ne zafin yake sauka har ma fiye.

A cewar masu binciken, idan iska ta dawwama a tsaye na tsawon lokaci, ragowar zafin yana ci gaba da haskakawa, kuma ta haka ne ake samun bayanan sanyi a duniya. Da farko anyi tunanin cewa za'a sami wadannan zafin yanayin rikodin a yankuna na musamman, yana nuna Scambos (shugaban aikin), amma an gano cewa akasin haka ana lura dashi a wani yanki mai tsayi na Antarctica.

Informationarin bayani: Yankin Siberian Altai ya rubuta mafi tsananin yanayin cikin shekaru 170Tsohon dusar kankara a duniya da aka gano a AntarcticaMasana kimiyya na Rasha sun ba da rahoton cewa sun isa Tafkin Vostok mil 2 a ƙarƙashin kankara Antarctic

Source: NASA


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