26 shekaru da suka gabata ya fara gwaji wanda ke gudana a duk wannan lokacin kuma yana ƙoƙari don gano yadda abin yake tasiri karuwar zafin jiki zuwa kasa daji. Amsar da masana kimiyya suka samu tana nuna amsa mai daɗi da ban mamaki.
Shin kuna son ƙarin sani game da gano wannan binciken da kuma dacewarsa?
Gandun daji
Sakamakon da aka samo daga wannan gwaji shine kamar haka: ɗumamar ƙasa yana motsa lokaci mai yalwa sakin carbon daga gare ta zuwa cikin sararin samaniyacanzawa tare da lokutan babu asara mai ganowa a cikin ajiyar carbon ɗin ƙasa. Wannan ya sa ya zama mai zagayawa kuma wannan yana nufin cewa, a cikin duniyar da yanayin zafi ke ƙaruwa, za a sami ƙarin filaye inda za a sami ra'ayoyin kai-da-kai, wanda zai ƙara da tarawar iskar carbon dioxide na yanayi saboda kona burbushin mai kuma zai bada gudummawa ga saurin dumamar yanayi.
A wata ma'anar, za a sami lokutan da ƙasa mai dazuzzuka za ta fitar da ƙarin carbon cikin yanayi da kuma lokacin da ba za su yi hakan ba. Wannan lokacin zai karfafa ta hauhawar yanayin duniya hakan zai sanya ƙasa tayi dumi kuma, saboda haka, ƙarin carbon a cikin sararin samaniya.
Binciken aikin ƙungiyar Jerry Melillo ne, daga Laboratory Biological Laboratory (MBL, don ƙayyadadden lafazin ta na Turanci), wanda ke da alaƙa da Jami'ar Chicago, a Amurka.
Gwaji
Gwajin ya fara ne a 1991, lokacin da a wani yanki na dazukan daji a cikin dajin Massachusetts suka binne wayoyin lantarki a wasu filaye. Don yin kwatankwacin dumamar yanayi, sun dumama ƙasa da digiri biyar sama da zafin ɗakin don kwatantawa tsakanin su. Bayan shekaru 26 har yanzu ana ci gaba, makirce-makircen da suka kara zafin jikinsu da digiri biyar, sun rasa kashi 17 cikin dari na carbon wanda yake adana shi a cikin kwayoyin halitta.
Wannan yana haifar da haɗarin ɗumamar yanayi yana daɗa kusantarwa kuma yana da wuyar dakatarwa.