Matsi na Orbital

**Tilasta Orbital** shine tasirin sauyin yanayi na jinkirin canje-canje a karkatar da kusurwar duniya da siffar kewayawar duniya a kusa da Rana (duba hawan keke Milankovitch ). Wadannan sauye-sauyen yanayi suna canza adadin hasken rana da ke isa Duniya da kashi 25% a tsakiyar latitudes (daga 400 zuwa 500 W/(m 2 ) a latitudes na digiri 60). A cikin wannan mahallin, kalmar  tana nufin tsarin jiki wanda ke shafar yanayin duniya.

An yi imanin cewa wannan hanyar tana da alhakin lokacin sake zagayowar zamanin kankara. Aikace-aikacen ka'idar Milankovitch ba ya ba da damar tsinkaya na zamanin kankara "ba zato ba tsammani" (ba zato ba zato ba tsammami kasancewa wani abu a ƙarƙashin ƙarni ko biyu), tunda lokacin da ya fi sauri shine kimanin shekaru 20,000. Lokaci na lokutan glacial da suka gabata ya dace sosai da tsinkayen ka'idar Milankovitch, kuma ana iya lissafin waɗannan tasirin a nan gaba.

Har ila yau, zagaye na Milankovitch suna da alaƙa da canjin muhalli a lokacin greenhouse na tarihin yanayi na Duniya. Canje-canje a cikin sediments na lacustrine wanda ya dace da lokaci na zagaye na lokaci-lokaci an fassara shi azaman shaida na tilasta orbital akan yanayi a lokacin lokutan greenhouse kamar Early Paleogene .  Musamman, an yi la'akari da zagaye na Milankovitch don zama mahimman masu daidaitawa na zagaye na biogeochemical a lokacin Abubuwan da suka faru na anoxic na teku, gami da Toarcian Oceanic Anoxic Event,  da Mid-Cenomanian Event,  da kuma Cenomanian-Turonian Oceanic Anoctic Event.  

## Bayani na gaba ɗaya

Wani lokaci ana tabbatar da cewa tsawon yawan zafin jiki na yanzu zai yi kama da na gaba ( Saboda haka, muna iya kusantar ƙarshen wannan lokacin zafi. Koyaya, wannan ƙaddamarwa mai yiwuwa kuskure ne: tsawon interglacials na baya ba na yau da kullun ba ne (duba hoto a dama). Berger da Loutre (2002) suna jayayya cewa "tare da ko ba tare da rikice-rikicen ɗan adam ba, yanayin zafi na yanzu na iya ɗaukar wasu shekaru 50,000. Dalilin shine mafi ƙarancin ƙarancin yanayin duniya a kusa da Rana. " [1] Har ila yau, Archer da Ganopolski (2005) sun ba da rahoton cewa yiwuwar fitar da CO2 na gaba na iya isa ya hana sake zagayowar kankara na gaba na 500 kyr.

Lura a cikin zane, ƙarfin Shekaru 100,000 na zagaye, da kuma ƙarancin ƙuƙwalwar ƙuƙwalwa. Wannan asymmetry an yi imanin ya haifar da hadaddun hulɗa na hanyoyin ra'ayoyi. An lura cewa shekarun kankara suna zurfafawa cikin matakai masu ci gaba. Koyaya, farfadowa ga yanayin interglacial yana faruwa a cikin babban mataki ɗaya.

Masana kimiyyar sararin samaniya suna buƙatar cewa tsawon lokutan ya dace da wuraren da aka share na sassan yanayi, don haka lokacin da ƙarancin ya yi tsananin gaske, lokutan da ke gefen nesa na sararin samaniya na iya ɗaukar lokaci mai tsawo. A yau, lokacin kaka da hunturu a Arewacin Hemisphere ya faru a kusa da shi, Duniya tana motsawa a mafi girman saurin sabili da haka kaka da hunturi sun ɗan gajeren lokaci fiye da bazara da rani. 

A yau a Arewacin Hemisphere, lokacin rani ya fi kwanaki 4.66 tsayi fiye da hunturu kuma bazara ya fi kwanaki 2.9 tsayi fiye na kaka. Yayin da Axial precession ke canza wurin a cikin duniya inda solstices da equinoxes ke faruwa, hunturu na Arewacin Hemisphere zai zama tsawo kuma lokacin rani zai zama gajere, a ƙarshe ya haifar da yanayin da aka yi imanin cewa yana da kyau don haifar da lokacin glacial na gaba.

Shirye-shiryen nauyin ƙasa a farfajiyar Duniya an yi imanin cewa suna ƙarfafa tasirin tilastawar orbital. Kwatanta sake fasalin nahiyar tectonic da nazarin paleoclimatic sun nuna cewa zagayen Milankovitch suna da tasiri mafi girma a lokacin geologic lokacin da aka mayar da hankali ga yankuna masu tasowa, kamar yadda yake a yau. Greenland, Antarctica, da sassan arewacin Turai, Asiya, da Arewacin Amurka suna cikin irin wannan cewa karamin canji a cikin hasken rana zai daidaita ma'auni a cikin yanayin Arctic, tsakanin kiyaye dusar ƙanƙara / kankara na shekara-shekara da kuma kammala narkewar bazara. Kasancewa ko rashin dusar ƙanƙara da kankara tsari ne mai kyau don sauyin yanayi.

## Manazarta