Sabbin bincike sun nuna cewa duniya ba ta juyawa da sauri mai ɗorewa kamar yadda aka yi tunani ba, amma ta fara jinkirta da sauri ba a taɓa gani ba tun kimanin shekaru miliyan 3.6 da suka wuce. Ko da yake wannan jinkirin yana auna da sassa na mili-sekondi, yana da tasiri mai ma'ana a rayuwarmu ta yau da kullum, musamman a fannonin lokacin duniya da tsarin kewayawa na zamani.
A cikin cibiyar sabis na duniya don juyin duniya da tsarin daidaitawa "IERS" a Paris, masana suna kwatanta juyin duniya da agogon atom masu inganci sosai akai-akai. Wadannan kwatancen sun nuna cewa duniya ta fara jinkirta ba tare da tsammani ba a cikin shekaru ashirin da suka gabata, ba tare da tasirin jan hankali na wata kamar yadda aka yi tunani ba, amma saboda motsin ruwa a saman duniya sakamakon narkewar kankara da canjin yanayi.
Bayani kan abin da ya faru
Tsawon shekaru biliyan, jan hankali na wata shine babban dalilin da ke jinkirta juyin duniya, inda jujjuyawar ruwa tsakanin wata da teku ke canza wani bangare na kuzarin juyin duniya zuwa wata, wanda ke kara tsawon rana da kusan 1.8 mili-sekondi a kowace ƙarni. Wannan jinkirin yana da tsammani da kuma ɗorewa, wanda ya ba da damar masana su gyara agogunan duniya daidai ta hanyar abin da aka sani da "ƙarin seconds", inda aka ƙara 27 seconds tun daga shekarar 1972.
Amma a cikin shekaru ashirin da suka gabata, masana sun lura cewa adadin jinkirin duniya ba ya zama mai tsari, kuma ya fara bayyana wani sabon tasiri wanda ba a san shi ba a baya, wato narkewar kankara da sake rarraba ruwa a duniya. Ruwa wanda aka rufe a ƙauyuka biyu ya fara zubowa zuwa teku, wanda ke ƙara kumburin a layin da ke tsakanin ƙasa da sama da kuma canza juyin duniya na duniya.
Bayani da Tushen Labari
Masana suna kwatanta duniya da "masu zane kankara"; lokacin da mai zane ya shimfiɗa hannayenta, saurin ta yana jinkirta. Hakanan, sake rarraba ruwa yana haifar da jinkirin juyin duniya. Masanin bincike a Jami'ar Vienna, Mustafa Kiani Shahvandi, ya ce, "Ba a taɓa samun lokacin da mai zane na duniya ya shimfiɗa hannayenta a wannan sauri ba, kamar yadda ya faru tsakanin shekarun 2000 da 2020, saboda hauhawar matakan teku da wannan adadin."
Ko da yake canjin a tsawon rana yana bayyana ƙanana sosai - kusan 1.33 mili-sekondi a kowace ƙarni - amma waɗannan ƙananan sassan lokaci suna taruwa da lokaci, wanda ke shafar tsarin da suka dace kamar tsarin gano wurin duniya "GPS" da sauran taurari. Wadannan tsarin suna dogara ne akan daidaiton juyin duniya, kuma duk wani bambanci ko kadan tsakanin lokacin atom da juyin duniya na duniya na iya haifar da kuskure a cikin gano wurin.
Tasirin da Sakon
Masani a fannin geodesy da ilimin ƙasa a Cibiyar Fasaha ta Tarayya ta Switzerland a Zurich, Benedict Suga, ya ce, "A ƙarshen ƙarni, ana sa ran tasirin canjin yanayi akan tsawon rana zai fi tasirin wata da kanta, wanda ke nuna cewa aikin ɗan adam ya zama ɗaya daga cikin manyan abubuwan da ke shafar juyin duniya."
Ko da yake waɗannan canje-canje ba su shafi rayuwar yau da kullum ba sosai, suna wakiltar babban kalubale ga kimiyya da fasahohi da ke dogara da daidaito na mili-sekondi, musamman a fannonin sararin samaniya, soja, da fasahar zamani.
Tasirin a Yankin Larabawa
Yankin Larabawa yana daga cikin wuraren da suka fi shafar canjin yanayi, inda ke fama da hauhawar zafin jiki da ƙarancin ruwa. Tasirin da ke tasowa daga jinkirin juyin duniya na iya haifar da ƙarin matsaloli, wanda ke buƙatar ɗaukar matakai na gaggawa don magance kalubalen muhalli.
A ƙarshe, wannan gano yana nuna cewa canjin yanayi ya wuce kawai hauhawar zafin jiki da narkewar kankara, har ma yana shafar juyin duniya na duniya. Fahimtar waɗannan al'amuran yana da matuƙar muhimmanci don guje wa tasirinsu mara kyau akan fasaha da rayuwar yau da kullum.