Ehlobo, i ukukhishwa kweqhwa Kuyinto evamile ngokuphelele. Amazinga okushisa afudumele abangela ukuba iqhwa lincibilike ngesivinini esisheshayo. Nokho, phakathi nobusika, ulwandle olupholile kulindeleke ukuba luphinde luqhwande, inqubo eye yashintshwa umsebenzi womuntu kanye nomthelela wayo ophawulekayo endaweni ezungezile.
Ucwaningo oluphawulekayo olwenziwa yiqembu lososayensi baseSpain luveze ukuthi ukuchitheka kweqhwa kuzo zombili izigxobo sekuqalile ukudlulela ngale kwenkathi yehlobo evamile. Eminyakeni eyishumi nje edlule, ukukhishwa okuphezulu kwaqoshwa ikakhulukazi ezinyangeni zikaJulayi no-Agasti. Njengamanje, lesi simo sandile, kusukela ngoJuni kuya ku-Okthoba.
Izilinganiso zakamuva zephrojekthi I-GLAKMA (Ama-Glaciers, CrioKarts and Environment) akhombisa lokho Umkhuba ungase uqhubeke ukhula ngokuqhubekayo. NgoMeyi, amazinga okukhishwa abonwa abonakala kakhulu ekuqaleni kwehlobo. Lolu cwaningo lwenziwa ezisekelweni zeqhwa e-Swedish Arctic, i-Vatnajökull ice cap e-Iceland, izinguzunga zeqhwa zase-Svalbard e-Norway, kanye ne-Urals esenyakatho eRussia.
Umthelela ku-Southern Hemisphere
ENingizimu Nenkabazwe, ukuhlaziya kugxile ezinguzunga zeqhwa ezintathu eziseNhlonhlweni ye-Antarctic, kanye nase-Argentina nasePatagonia yaseChile. Le nethiwekhi yokuhlola ebanzi kuwo womabili ama-hemispheres inikeza ulwazi olubalulekile, okuvumela ukuqhathanisa nokuchithwa kweqhwa ngokusekelwe ekushintsheni kwesimo sezulu. Lokhu kushintsha kwesimo sezulu, okuphawuleka ngokwanda kwamazinga okushisa ezingxenyeni ezihlukahlukene zomhlaba, kubangela ukwanda kwezinga lokushisa ulwandle ngenxa yokuncibilika kwezinguzunga zeqhwa. Kuyathakazelisa ukuqaphela ukuthi, ezingeni lomhlaba jikelele, Izinguzunga zeqhwa zase-Arctic nazo zibhekene nezinguquko ezinkulu, ezigqamisa ithonya lokufudumala kwembulunga yonke kulesi simo.
Ukukhuphuka kwamazinga olwandle sekuvele kungokoqobo. Ubufakazi be ukufudumala kwezwe ibonakala kudatha eqoqwe. Ngokombiko we-GLACKMA, Izinga lokushisa le-ambient kanye nokukhishwa kwe-glacial liquid yizimo ezimbili eziphakathi nendawo iwusizo ekulinganiseni ukuvela kokukhuphuka kwezinga lokushisa. Lokhu kwakamuva kuzinzile ikakhulukazi, kuvumela amarekhodi anembile ama-maximus kanye nenani elincane. Ngaphezu kwalokho, ucwaningo lwamuva lubonisa lokho izinguzunga zeqhwa zaseGreenland Baphinde bethule imifantu ephazamisayo engase ithinte ukukhishwa kweqhwa, okwenza kuphuthume ukuhlaziya umthelela wokufudumala kwembulunga yonke ngobuningi bawo.
Ama-glaciers, asebenza njenge izinzwa zemvelo zokuguquka kwesimo sezulu, ziyancipha ngobuningi ngenxa yokuncibilika okubangelwa ukufudumala kwembulunga yonke futhi, ngenxa yalokho, amazinga olwandle ayaqhubeka nokukhuphuka. Lesi simo simelela inselelo enkulu emiphakathini yasogwini kanye nesimiso semvelo sasolwandle, okufanele sivumelane nezimo zezulu ezishintsha njalo.
Ukukhishwa kwe-glacial kanye nesimo sezulu
Ukukhishwa kwe-glacial liquid kubalulekile ukuze uqonde ukuthi isimo sezulu nezinguzunga zeqhwa zihlobana kanjani. Lokhu kuphuma kubhekisela ekugelezeni kwamanzi eqhweni elincibilikayo futhi adedele olwandle nasemifuleni. Isenzakalo sokukhishwa kwe-glacial asithinteki nje kuphela ngokushisa komoya, kodwa futhi nenani imvula etholwa ngesimo seqhwa nemvula. Ezifundeni lapho amazinga okushisa aphezulu avela khona, njengoba kubonakala ku- imiphumela yokuguquka kwesimo sezulu, ukuncibilika kweqhwa kuvame ukugqama kakhulu ezinyangeni zasehlobo, kuyilapho ebusika zihlala zizinzile. Isibonelo esicacile salokhu yindaba , esingalinganisa ngayo emkhathini.
Kodwa-ke, ukwenzeka kokukhishwa kweqhwa sekuqalile ukubonakala ukuhlukahluka kwesizini okukhathazayo. Njengoba amazinga okushisa embulunga yonke eqhubeka nokukhuphuka, kubonakala sengathi isigaba sokuncibilika sizokwengeza ezinyangeni ezengeziwe zonyaka. Lokhu kubangela iluphu yempendulo lapho amanzi engeziwe engena olwandle, okunomthelela ekukhuphukeni kwezinga lolwandle futhi kuguqule imisinga yolwandle kanye nemvelo yasolwandle.
Ucwaningo selukhombisile ukuthi ukufudumala kwezwe Akuthinti kuphela izinguzunga zeqhwa ezindaweni ezishisayo, kodwa futhi nezinguzunga zeqhwa ezingxenyeni ezihlukahlukene zomhlaba, ezinomthelela emhlabeni jikelele. Ezifundeni lapho izinguzunga zeqhwa zihlehla, njengase-Asia, kubalulekile ukwenza izifundo ezinemininingwane mayelana imiphumela yokuncibilika ukuqonda imiphumela yesikhathi eside yalokhu kulahleka kwenqwaba yeqhwa.
Ikusasa lezinguzunga zeqhwa esimweni sezulu esishintshayo
Njengoba ukuguquka kwesimo sezulu kubusa umhlaba wonke, kubalulekile ukunaka ukuthi izinguzunga zeqhwa zisabela kanjani kulezi zinguquko. Izilinganiso ziphakamisa ukuthi uma ukukhishwa kwe amagesi abamba ukushisa azincishiswa kakhulu, sizolahlekelwa inani elikhulu lendawo yethu yokugcina amanzi ahlanzekile agcinwe eyiqhwa. Kubalulekile ukutadisha izintaba-mlilo e-Antarctica okungase kuthinte le nqubo.
Isibonelo, i-Thwaites Glacier e-Antarctica isiphenduke indawo yokunakwa ngenxa yamandla ayo okufaka isandla ekukhuphukeni kwezinga lolwandle. Le qhwa ibonise izimpawu zobuthakathaka nokuhlehla, okwenza kube nokwenzeka ukuthi uma ukufudumala kwembulunga yonke kuqhubeka, kungase kuphazamise futhi kukhiphe amanzi amaningi olwandle. Isimo e-Antarctica ngokungangabazeki siyakhathaza, ikakhulukazi maqondana
Ngaphezu kwalokho, ukuqapha njalo izimo zeqhwa kubalulekile ukuze kuqondwe ukuguquguquka kwesimo sezulu. Imizamo efana nephrojekthi ye-GLACKMA isebenzela ukusebenzisa amasu athuthukile okuthola idatha ngqo ngesimo nezitayela zezinguzunga zeqhwa kanye nobudlelwano bazo nesimo sezulu somhlaba. Lokhu kubandakanya ukuhlaziywa kwe iqhwa e-Alps kanye nomthelela wawo emjikelezweni wamanzi.
Kubalulekile ukuthi kwenziwe imizamo eqhubekayo yokucwaninga futhi kuncishiswe imiphumela yokufudumala kwembulunga yonke kumaqhwa. Ukuvikelwa kwalezi ziqhwaga akubalulekile nje kuphela ekulinganiseni isimo sezulu, kodwa kubalulekile nasekusindeni kwenqwaba yabantu. izinhlobo kanye nemiphakathi ethembele kuyo ukuze bathole amanzi kanye nokuziphilisa.
