Shekaru 42,000 da suka gabata, duniya ta fuskanci wasu ƴan ƙarni na yanayin apocalyptic sakamakon juyewar igiyoyin maganadisu na duniya tare da canje-canjen halayen Rana. Wannan shine mabuɗin gano sabon binciken mu na fannoni daban-daban, wanda aka buga a mujallar Kimiyya. Wannan sabon babban juyi na geomagnetic ya saita jerin abubuwan ban mamaki waɗanda ke da sakamako mai nisa ga duniyarmu. Sun kasance kamar shirin fim mai ban tsoro, sararin samaniyar ozone ya lalace, guguwar lantarki ta ratsa cikin wurare masu zafi, iskar hasken rana ta haifar da nunin haske (auroras), iska ta arctic ta zube a Arewacin Amurka, zanen kankara da glaciers ya karu, yanayin yanayi ya canza. tashin hankali.
A lokacin waɗannan abubuwan da suka faru, rayuwa a duniya ta fuskanci tsananin hasken ultraviolet. YL Neanderthals zuwa megafauna ya zama batattu, yayin da mutanen zamani suka nemi mafaka a cikin kogo. Ƙarfin maganadisu na arewa, inda allurar kamfas ɗin ke nuna, ba shi da wurin dindindin. A haƙiƙa, gabaɗaya yana yawo a kusa da sandar yanki na arewa inda duniya ke juyawa akan lokaci saboda motsin da ke cikin duniyar duniyar.
Saboda dalilan da har yanzu ba a bayyana su ba, motsin sandunan maganadisu na iya zama wani lokacin wuce gona da iri. Ɗaya daga cikin ƙaura mafi ban mamaki daga waɗannan sandunan ya faru kimanin shekaru 42,000 da suka wuce kuma ana kiranta da bikin Laschamps, wanda aka ba da sunan garin da aka gano a Massif Tsakiyar Faransa. An gane taron Laschamps a duniya, ciki har da kwanan nan a Tasmania, Ostiraliya. Amma har ya zuwa yanzu, ba a bayyana ko irin waɗannan sauye-sauyen maganadisu suna da wani tasiri ga yanayi da rayuwa a duniyarmu ba. Sabon aikinmu ya tattara shaidu da yawa da ke nuna cewa tasirin ya kasance na duniya da kuma nisa.
Kauri Bishiyoyi
Don mu bincika abin da ya faru, mun bincika tsofaffin itatuwan kauri na New Zealand, waɗanda aka adana su a cikin ɓangarorin peat da sauran tarkace fiye da shekaru 40,000. Yin amfani da zoben girma na shekara-shekara na bishiyar kauri, mun sami damar ƙirƙirar cikakken lokaci na yadda yanayin duniya ya canza a wannan lokacin.
Bishiyoyin sun bayyana tsayin daka a cikin matakan iskar radiocarbon da ke haifar da rugujewar filin maganadisu na duniya lokacin da sandunan ke motsawa. Wannan ya ba da wata hanya ta haɗa daidaitattun bayanan da aka tarwatsa cikin ƙasa. Bishiyoyin Kauri suna kama da Dutsen Rosetta, suna taimaka mana wajen tattara bayanan sauyin yanayi a cikin kogo, dusar ƙanƙara, da ciyayi a duniya, in ji Farfesa Alan Cooper, wanda ke jagorantar wannan aikin bincike.
Yin amfani da sabon tsarin lokutan da aka ƙirƙira, mun sami damar nuna cewa bel ɗin ruwan sama na wurare masu zafi na Pasifik da iskar yammacin Tekun Kudancin Tekun Kudu sun ƙaura ba zato ba tsammani a lokaci guda, suna haifar da yanayi mara kyau a wurare kamar Ostiraliya. Haka kuma, megafauna iri-iri sun bace, ciki har da manyan kangaroo da wombats. Gabaɗaya arewa, babban filin kankara na Laurentide ya girma cikin sauri a gabashin Amurka da Kanada, yayin da a Turai Neanderthals suka ɓace.
Samfuran Yanayi
Yin aiki tare da shirin kwamfuta wanda ya kwatanta hulɗar duniya tsakanin sunadarai da yanayi, mun bincika tasirin filin maganadisu mai rauni da canje-canje a ƙarfin Rana. Mahimmanci, yayin canjin maganadisu, ƙarfin filin ya ragu zuwa ƙasa da 6% na abin da yake a yau. Kompas na baya zai yi wuya a sami arewa. Ba tare da wani filin maganadisu ba, duniyarmu gaba ɗaya ta rasa ingantaccen garkuwarta daga hasken sararin samaniya, kuma yawancin barbashi masu shiga sararin samaniya sun shiga sararin sama. Baya ga wannan, Rana ta sami ƙaramin ƙaramin hasken rana da yawa, yayin da ayyukan ya yi ƙasa da ƙasa amma kuma ya fi rashin kwanciyar hankali aika manyan fitattun hasken rana waɗanda ke ba da damar hasken ionizing mai ƙarfi ya isa duniya. Samfuranmu sun nuna cewa wannan haɗin abubuwan yana da tasirin haɓakawa.
Hasken sararin samaniya mai ƙarfi daga cikin galaxy da kuma manyan haskoki na sararin samaniya daga hasken rana sun sami damar shiga sararin sama, suna cajin barbashi a cikin iska tare da haifar da canje-canjen sinadarai wanda ya haifar da asarar ozone na stratospheric. Kwaikwayo tsakanin sinadarai da yanayi sun yi daidai da motsin muhalli da aka gani a yawancin tarihin canjin yanayi.
Waɗannan yanayi kuma da sun yada hasken aurora mai ban mamaki a duniya, wani lokacin dare zai yi haske kamar rana. Muna ba da shawarar cewa sauye-sauye masu ban mamaki da manyan matakan ultraviolet da ba a taɓa gani ba sun sa mutane na farko su nemi mafaka a cikin kogo, wanda ya bayyana bayyanar furanni na dutsen dutse a duniya shekaru 42,000 da suka wuce. Tabbas ya zama kamar ƙarshen kwanaki.
Lamarin na Adams saboda daidaituwar abubuwan da ake ganin bazuwar sararin samaniya da sauye-sauyen muhalli da aka samu a duniya shekaru 42,000 da suka gabata, mun kira wannan lokacin taron Adams lambar yabo ga babban marubucin almarar kimiyya Douglas Adams. Adams ya rubuta Jagoran Hitchhiker zuwa Galaxy kuma ya gano 42 a matsayin
