Impembelelo yokukhanya evela kwindawo
Kwiminyaka emininzi ngoku, kukho ingxoxo malunga nokuba abantu babaluleke ngokwaneleyo ukuba bafanelekele ixesha lethu le-geological. Impembelelo enkulu uluntu oluye lwaba nayo kwiplanethi kunye nokusingqongileyo, okubangela ukuphela kunye nokuguqula imijikelo yendalo kunye nemozulu yenza ukufunda yongeza umnxeba I-Anthropocene kwisikali sejoloji yehlabathi.
Ukusukela ngo-2009, iqela lezenzululwazi lamazwe ngamazwe belifunda ukwazisa le ngcamango intsha kunye nendawo yokufumana isiqalo seli xesha. Kusalungiswa ingxelo ngoku kwaye iza kunikezelwa phambi kwe IManyano yaMazwe ngaMazwe yeNzululwazi yeJoloji ngo-2016. Lo mzimba kuphela kwequmrhu elinobuchule elijongene nokwenza isigqibo malunga nobudala boMhlaba.
Kude kube kugqitywe ekubeni sazise olu hlengahlengiso, siya kuqhubeka sihlala kwiHolocene, ixesha elaqala malunga ne-12000 kwiminyaka eyadlulayo emva kwexesha lokugqibela le-Holocene. glaciations. Imozulu epholileyo yeli xesha le-glaciation yinto eye yavumela uluntu ukuba luqhubele phambili ngokukhawuleza njengoko luye lwahamba, kwaye ukuqhubela phambili kunye nefuthe elikhoyo kwihlabathi apho sihlala khona yintoni eyenza abantu baqale ukucinga ngokubandakanywa ixesha elitsha ezinxulumene ngqo nabantu.
Enye yeengongoma eziphambili kwaye malunga neyona ngxoxo ininzi kukumisela ukuba eli xesha litsha lejoloji laqala nini. Amanqaku amabini aphakanyisiweyo aye ukuqala kwexesha lenyukliya embindini wenkulungwane yama-20 ngeziqhushumbisi zaseHioshima naseNagasaki kwaye kamva neengozi ezinje ngeChernobyl okanye isityalo seFukushima eziye zashiya iziphawuli ngemitha ebantwini naselwandle nakwintlenga. Kwelinye icala, kuyacetywa ukuqala kwenguqu kwezoshishinol ngenkulungwane ye-17 okanye ukuvela kwezolimo malunga neminyaka eyi-10000 XNUMX eyadlulayo.
Izizathu ezinikwe ziithiyori ezahlukeneyo zokufumana isiqalo seli xesha litsha lokwakheka komhlaba zinxulumene nokubonakala kwayo irekhodi yentlenga. Makhe sibe nomfanekiso-ngqondweni wengcali yokwakheka komhlaba kwiminyaka eyi-10000-20000 ukususela ngoku, kuya kufuneka ifumane iimpawu ezithile ezahlulayo kwisitrato esinxulumene nexesha ukuze liyichonge njengeyalo ixesha lokwakheka komhlaba.
Ukuthathela ingqalelo ezi ndawo, ukunxulumanisa ukuqala kweli xesha kunye nenkangeleko yezolimo kuya kwenzeka ngenxa yokuba kuxa abantu beqala ukuqhelanisa umhlaba kubo kwaye bangaziqhelani nomhlaba. Ukuhamba kwe-sediments eyenziwa ngumntu ukususela kulo mzuzu kunokugqithisa okubangelwa naluphi na uhlobo lwendalo yendalo, ukulungiselela umhlaba wokulima, ngokusetyenziswa kwee-quarries, kwaye kamva ukusetyenziswa kwezoshishino kunye nokwakhiwa kwezixhobo zomgangatho.
Kwelinye icala, ukuqwalaselwa kwesiqalo soguqulo lwemizi-mveliso njengendawo yokuqala kweli xesha litsha kuye kwacetywa njengesiqalo sexesha le-geological, kuthethwa ukuba ukuqala kokusetyenziswa kwamafutha efosili (amalahle, ioli, njl. ) kunye nezinto ezithi ukutsha kwazo zikhuphele kwiatmosfera ziya kubonakala njengenxalenye yophawu. Kwangaxeshanye, ukusetyenziswa komhlaba okuthe kratya kunye nokuxhaphazwa okugqithisileyo kweekwari nemigodi nako kuya kuba yenye into ekufuneka ithathelwe ingqalelo.
Kuyo nayiphi na imeko, ezi ziphakamiso zibini ziphantse zikhutshwe, ekubeni nangona impembelelo kwintlenga iya kuba banzi kakhulu, ayiyi kuchaphazela umhlaba wonke, nangona kunjalo, kusezandleni ze-International Union of Geological Sciences. ukugqiba ukuba ingaba ifanelekile na okanye hayi.
Olona khetho luchanekileyo, kwaye ekusenokwenzeka ukuba lelona linethuba elingcono lokukhethwa, rhoqo kwimeko apho ukwaziswa kweli xesha litsha kwimbali yokwakheka komhlaba kwamkelwe, lelo lokuqalisa kwexesha lenyukliya okanye leathom. Zombini iimvavanyo zenyukliya kunye neengozi kwimizi-mveliso yamandla enyukliya zenziwe amasuntswana eradioactive akhoyo phezu komhlaba wonke kwaye ziya kuhlala emhlabeni, emanzini nasemoyeni iminyaka emininzi zenza ukwandiswa kolu hlobo lwamasuntswana anele ukuba luthathwe njengolwandiso lwehlabathi.
Umkhuthazi wale ngcamango yokugqibela, Jan Zalasiewicz, isazinzulu kwiYunivesithi yaseLeicester, sigcina ukuba ukongeza kwimpembelelo yenyukliya kukho ezinye izinto ezifana nefuthe lomntu kunye nobuchwepheshe bakhe kunye nenkangeleko yezinto ezifana neplastiki okanye i-aluminium okanye ukuxinwa kweCO2 emoyeni. kunye ne-acidification yeelwandle kusikhokelela ekubeni sithethe "ngoKukhawuleza okukhulu" okuya kulufanelekela olu "zuko."
Yonke into ineendleko zentlangano eya kuba ngumphathi we-2016 yokuvavanya zonke ezi ngongoma kunye nokugqiba ukuba umntu yedwa ufanelwe i-geological epoch kunye nokuba isiqalo sayo siya kuba yintoni, okanye ukuba, ngokuchaseneyo, njengenxalenye enkulu uluntu lwezenzululwazi "sifuna nje ukuzinika ukubaluleka ngakumbi kunokuba sinakho ngokwenene."
Iinkcukacha ezithe xaxe: Ukufudumala okungapheliyo koMhlaba kuya kuphakamisa ulwandle ngaphezu kwemitha; Ngaba uMhlaba uphela ukhe waba ngumkhenkce?