Ònye ka mkpụrụ akwụkwọ mbụ dị na "MBH99" na-ezo aka na ya? N'iburu ajụjụ nke mbụ n'uche, dee ihe gbara ya gburugburu bụ́ nke ga-enye azịza ya. Ọ nwere ike ịbụ 1 - 20 ahịrịokwu. Ihe ndị gbara ya gburugburu:
Akụkọ nyocha nke atọ (TAR) gosipụtara eserese akpọrọ "Millennial Northern Hemisphere temperature reconstruction" dabere na akwụkwọ 1999 nke Michael E. Mann, Raymond S. Bradley na Malcolm K. Hughes (MBH99), nke a na-akpọ "eserese hockey stick". Ihe osise a gbatịrị eserese yiri nke dị na eserese 3.20 site na IPCC Akụkọ Nyocha nke Abụọ nke 1995, ma dị iche na atụmatụ dị na akụkọ nyocha mbụ nke na-enweghị nkeji okpomọkụ, mana ọ dị ka ọ na-egosipụta mgbanwe dị ukwuu nke okpomọkụ ụwa n'ime afọ 1000 gara aga, na okpomọkụ dị elu n'oge Oge Ọdịdị Na-ekpo ọkụ karịa n'etiti narị afọ nke 20. Atụmatụ ahụ abụghị ezigbo eserese nke data, ma dabere na eserese nke okpomọkụ na etiti England, na okpomọkụ mụbara na ndabere nke ihe akaebe akwụkwọ nke ubi vaịn Medieval na England. Ọbụna n'agbanyeghị mmụba a, ọ̀tụ̀tụ̀ okpomọkụ kasị elu e nwere n'Oge Okpomọkụ Oge Ochie erughị nke e dekọrọ n'etiti England n'afọ 2007. Nchọpụta MBH99 kwadoro site na nrụzigharị nke Jones et al. 1998, Pollack, Huang & Shen 1998, Crowley & Lowery 2000 na Briffa 2000, na-eji data na usoro dị iche iche. A na-ejikọta Jones et al. na Briffa na MBH99 na Figure 2.21 nke akụkọ IPCC.