Yuav ua li cas ntxiv melting ntawm glaciers hauv Greenland ua rau?

2024 Tus sau: Henry Conors | [email protected]. Kawg hloov kho: 2024-02-12 07:49

Hmoov tsis zoo, txij li kev kos npe ntawm Kyoto Treaty, qhov xwm txheej nrog huab cua hauv peb lub ntiaj teb tseem nyuaj. Tsis tas li ntawd, nyob rau ib nrab xyoo dhau los, nws tau hnyav zuj zus ntxiv, vim tias tus nqi ntawm cov dej khov yaj hauv Greenland thiab Antarctica tau nrawm dua.

Kev melting ntawm glaciers ntawm Greenland, uas tseem tsis tau sau tseg nyob rau hauv peb ntiaj chaw, yog ib qho kev txhawj xeeb tshwj xeeb rau cov kws tshawb fawb. Cov kws tshaj lij tau tshaj tawm tias dhau 30 xyoo dhau los ntawm kev soj ntsuam, tus nqi ntawm cov dej khov yaj tau nce ntau heev uas nyob rau ob peb xyoos Greenland tuaj yeem raug hu ua "cov kob ntsuab", vim tias tej zaum yuav tsis muaj dej khov rau ntawm nws.

Qhov tseeb tias txawm tias nyob rau ntawm qhov siab tshaj plaws ntawm cov kob zoo kawg no, qhov twg cov dej khov tsis tau yaj rau ntau txhiab xyoo, cov dej khov yaj tau raug kaw, kuj tseem muaj kev txhawj xeeb. Nws tau tshaj tawm tias yog tias ua ntej qhov feem pua ntawm melting tsis ntau tshaj 40%, tam sim no nws tau nce mus rau 97%. Qhov phem tshaj plaws yog cov kws tshawb fawb tsis tuaj yeem piav qhia txog qhov tshwm sim no.

Yuav ua li cas rov hais dua yog qhov tseeb tias cov dej khov ib nrab rov qab los, tab sis qhov no tshwm sim deb ntawm qhov nrawm uas nws tau ua dhau los. Yuav luag txhua txhua hnub, ntau thiab ntau daim tawg tawm ntawm lub plhaub dej khov ntawm Greenland.dej khov, qhov ntev ntawm qhov uas feem ntau yog qhov loj heev. Thaj chaw ntawm ib qho ntawm cov icebergs, uas tam sim no drifting tawm ntawm ntug dej hiav txwv ntawm Canada, tshaj 200 square meters. km!

Txhua yam no hem peb lub ntiaj teb li cas? Qhov phem tshaj plaws yog qhov melting ntawm glaciers nyob rau hauv 2012 tuaj yeem ua rau muaj kev puas tsuaj loj hauv ntiaj teb dej hiav txwv. Cov kws tshawb fawb kwv yees tias tom qab ua tiav cov dej khov Greenland, nws tuaj yeem loj hlob sai li 6 meters. Nyob rau tib lub sijhawm, koj yuav tsum nkag siab tias kev nce qib los ntawm ib lub 'meter' tsuas yog fraught nrog kev puas tsuaj zoo kawg. Yog hais tias lub melting ntawm glaciers tseem nyob rau tib tus nqi, ces tib neeg yuav muaj ib tug nyuaj lub sij hawm.

Tshwj xeeb pessimistic kws tshawb fawb kwv yees qhov muaj peev xwm ntawm kev hloov pauv ntawm cov phiaj xwm tectonic vim lawv tso tawm sai sai los ntawm qhov tsis txaus ntseeg ntau uas tau nias rau lawv ntau txhiab xyoo. Yog tias cov kev twv ua ntej no muaj tseeb, ces qhov dej khov ntawm cov dej khov tuaj yeem ua rau qhov tshwm sim ntawm qhov thib ob "lub nplhaib ntawm hluav taws" ntawm cov hluav taws kub ntawm lub ntiaj teb. Tsuas yog lub sijhawm no, cov chaw ntawm kev tawg yuav tsis nyob rau hauv hiav txwv Pacific uas muaj kev nyab xeeb rau peb, tab sis sab nraum ntug dej hiav txwv ntawm Tebchaws Europe.

Puas muaj qhov tshwm sim txaus ntshai no tiv thaiv? Hmoov tsis, tsuas yog ib feem. Peb yuav tsis muaj peev xwm txwv tsis pub cov txheej txheem txuas ntxiv ntawm cov dej khov ploj ntawm lub ntiaj teb tag nrho. Txawm li cas los xij, nrog rau theem tam sim no ntawm kev txhim kho thev naus laus zis. Tsis tas li ntawd, peb tsis tuaj yeem hais kom paub tseeb tias qhov ua rau muaj qhov dej khov ploj: tib neeg kev ua haujlwm lossis lwm yam laj thawj tsis paub rau peb.

Peb tsuas tuaj yeem ua tib zoo saib xyuas qhov dej khov ntawm cov dej khov thiab ua raws sijhawm kom khiav tawm cov neeg los ntawm cov chaw nyob hauv ntug dej hiav txwv uas txaus ntshai tshaj plaws thiab cov nroog. Lub luag haujlwm tseem ceeb yuav raug ua los ntawm kev ua haujlwm tas li ntawm seismologists, leej twg tuaj yeem lees paub lossis tsis lees paub txog kev hloov pauv ntawm cov phiaj xwm tectonic.