Ikhephu eliluhlaza

ikhephu eliluhlaza eAntarctica

Njengoko sisazi, utshintsho lwemozulu yinto eyenzeka kwihlabathi lonke esishiya sinexhala kunye nemifanekiso emangalisayo. Kwaye kukuba inyani yokuba iqondo lobushushu lehlabathi liyanda ngokuzinzileyo, ibangela iimeko ezithile. Ngenxa yokuba enye yeendawo zomhlaba ezafumana impembelelo enkulu ngenxa yokunyuka kwamaqondo obushushu e-Antarctica, kulapha apho unokubona khona izinto ezingaqhelekanga. Namhlanje sithetha ngesinye seziganeko ezimangalisa lonke uluntu lwenzululwazi. Imalunga ne- ikhephu eliluhlaza.

Kweli nqaku siza kukuxelela ukuba lithetha ntoni ikhephu eliluhlaza, ziziphi iimpawu zalo kwaye zeziphi iziphumo zalo malunga nokutshintsha kwemozulu.

Yintoni ikhephu eliluhlaza

Ikhephu eliluhlaza

Into onokucinga ngayo xa usiva igama lekhephu eliluhlaza, kukuba utyani luyakhula ngenxa yokunyibilika kwekhephu laseAntarctic. Okwangoku, ngenxa yokwanda kwamaqondo obushushu ehlabathi ikhephu elimhlophe lijika liluhlaza njengoko kukhula ulwelwe oluncinci. Xa ikhula kakhulu inekhephu eliluhlaza kwaye iyenza ibonakale umbala oqaqambileyo oluhlaza. Le nto inokubonwa nasemajukujukwini kwaye incede izazinzulu ukwenza imephu.

Yonke idatha iqokelelwa ngenxa yesathelayithi ezikwaziyo ukujonga nokuthatha imifanekiso. Ukuqwalaselwa kuthathwe ngaphezulu kwehlobo e-Antarctica kudityaniswe nokuqwalaselwa okuvela kwiisathelayithi ukuze zikwazi ukuqikelela yonke indawo apho kuvavanywa khona ikhephu eliluhlaza. Yonke le milinganiselo iya kusetyenziswa ukubala isantya esiza kuqhubeka ukusasazeka kwe-algae kwilizwekazi liphela ngenxa yokutshintsha kwemozulu.

Njengoko bekulindelekile, ukukhula kwezi algae zincinci kuya kuchaphazela amandla emozulu kwinqanaba lehlabathi.

Ikhephu eliluhlaza kunye ne-albedo yasemhlabeni

I-albedo yasemhlabeni lixabiso lemitha yelanga ebonakaliswa ukusuka kumphezulu ubuyela emajukujukwini ngezinto ezahlukeneyo. Phakathi kwezi zinto sifumana indawo enemibala ekhanyayo, amafu, iigesi, njl. Ikhephu liyakwazi ukubonakalisa ukuya kuthi ga kwi-80% yesiganeko semitha yelanga kuso. Yintoni efunyenwe kwifayile ye- Ikhephu eliluhlaza kukuba idatha ye-albedo incitshisiwe yaya kwi-45%. Oku kuthetha ukuba ubushushu obuninzi bunokugcinwa ngaphezulu ngaphandle kokuphinda uboniswe kwisithuba esingaphandle.

Kunokucingelwa ukuba okoko i-albedo e-Antarctica iza kuncipha, iya kuba ngamandla okuqhuba kweqondo lobushushu eliphakathi eliza kuzondla ngokwalo. Nangona kunjalo, imiba eyahlukeneyo echaphazela obu bushushu bendaleko kufuneka nayo ithathelwe ingqalelo. Umzekelo, ukukhula kwe-algae microscopic kukwafuna ukufakwa kwecarbon dioxide yifotosinthesisi. Oku kunceda ukunciphisa inani leegesi zegreenhouse, zona ezo, Iya kusinceda ukuba singanyusi amaqondo obushushu.

Emva koko, kubalulekile ukuhlalutya ibhalansi phakathi kobungakanani bobushushu obunokuthi i-Antarctica ikwazi ukuwugcina ngenxa yokwehla kwe-albedo yasemhlabeni, kunye nomthamo we-algae encinci yokufunxa icarbon dioxide emoyeni. Njengoko sisazi, icarbon dioxide yirhasi yegreenhouse ekwaziyo ukugcina ubushushu. Ke ngoko, eyona carbon dioxide isemoyeni, kuya kugcinwa ubushushu obungakumbi kwaye ke oko kuya kukwandisa amaqondo obushushu.

Izifundo kwi-algae microscopic eAntarctica

Imijelo yekhephu eluhlaza

Sele zikhona izifundo ezininzi esele zishicilelwe kwijenali Nature Communications Baqikelela ukuba ikhephu eliluhlaza liya kuqhubeka lisasazeka kulo lonke ilizwekazi laseAntarctic. Njengokuba utshintsho lwemozulu lusonyusa ubushushu obuphakathi, kufanele ukuba sisasaze ngakumbi kwezi algae.

Izifundo zikwabonisa ukuba iAntarctica yindawo ebonisa utshintsho olwenziwe kukutshintsha kwemozulu ngokukhawuleza. Oku kufudumala kuyanda ngokukhawuleza kule nxalenye yesijikelezi-langa. Idatha yokufunda ibonakalisa ukuba ngoJanuwari, ubushushu buye barekhodwa kwimpuma yeAntarctica. Olu hlobo lobushushu lubangele amaqondo obushushu ayi-7 ngaphezulu komndilili. Njengoko inkqubo yokufudumeza iqhubeka, inani le-microalgae liyakonyuka ngakumbi nangakumbi.

Ingxaki kukuba ikhephu alisekho ngokuqhubekayo njengangaphambili. Kufuneka sikuthathele ingqalelo nokunyuka komphakamo wolwandle okuya kubangela ukunyibilika komkhenkce waseAntarctic. Ukukuqonda ngcono, kufuneka kukhunjulwe ukuba umahluko ophambili phakathi kwe-Antarctica kunye neNorth Pole kukuba e-Antarctica kukho ilizwekazi eliphantsi komkhenkce. Oku kubangela ukuba, ukuba umkhenkce unyibilika ngaphezulu komhlaba, wonyukela kwinqanaba lolwandle. Ukuchasana kwenzeka ngeNcam yePhondo. Iminqwazi polar kwinxalenye esemantla akukho lizwekazi phantsi kwabo. Ke, ukuba eli qhwa liyanyibilika aliyi kunyusa manqanaba olwandle.

Ubulembu obuye bafundwa eAntarctica bujolise elunxwemeni. Kungenxa yokuba ziindawo ezifudumeleyo kuba zinamaqondo obushushu aphakathi nje kwe-zero degrees. Ukwanda kwe-microalgae kukwakhuthazwa zizilwanyana ezanyisayo kunye neentaka zolwandle. Kwaye ilindle lezi zilwanyana lisondlo kakhulu kwezi zinto ziphilayo zokwenziwa kwe-photosynthetic. Oko kukuthi, kwale ilindle lisebenza njengesichumisi kwaye linegalelo ekukhuleni kwalo.

Isinki entsha ye-CO2

Kuyaziwa kwizifundo ukuba uninzi lweealgal colonies zikufuphi neepenguin colonies. Zibekwe kwindawo apho ziphumla khona ezimbalwa kwaye zikufutshane nakwezinye iindawo apho iintaka zihlala khona.

Yintoni enokubonwa njengeyona ndawo intle kuyo yonke le nto, kukuba kuzakubakho isinki entsha ye-CO2 emhlabeni. Kuba i-algae igcina inqanaba eliphezulu le-photosynthesis, amandla ayo aveliswa ngexesha lale nkqubo kwaye le gesi ye greenhouse iyangena. Enkosi ekukhuleni kwale algae, isixa esikhulu sekhabhon diokside siyakukhutshwa emoyeni kwaye sinokubalwa njengendawo elungileyo. Isinki entsha ye-CO2 inokufunxa ukuya kuthi ga kwiitoni ezingama-479 ngonyaka. Eli nani linokuphakama kuba zikhona ezinye iintlobo zeorenji kunye nobomvu ulwelwe olungakabandakanywa kolu phando.

Ungacingi ukuba yonke le nto izakulunga ngokubanzi, kuba Iziphumo zotshintsho lwemozulu zinzima kangangokuba ezi ziphumo zekhephu eliluhlaza azinakulinganiswa.

Olu lwazi banokufunda ngakumbi malunga nekhephu eliluhlaza nokubaluleka kwalo.


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