Dalton dị Obere
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Dalton Minimum bụ ógè nkè ọnụ ọgụgụ nké gbadara àlà ébé anyanwụ, na-anọchite anya ọrụ dị ala nke anwụ, nke akpọrọ aha ónyé England na-ahụ màkà ihu igwe John Dalton, nke na-adị site n'afo 1790 ruo afọ 1830 ma ọ bụ afọ 1796 ruo 1820, nke kwekọrọ na ógè okirikiri anyanwụ 4 ruo okirikiri nke anyanwụ 7.[1][2] Ọ bụ ezie na a na-ejikarị Dalton Minimum tụnyere Maunder Minimum, ọnụ ọgụgụ sunspot ya dịtụ elu ma kọọrọ sunspots na-ekesa na hemispheres anyanwụ abụọ n'adịghị ka Maunder Minimal.[3] A na-egosipụta ihe ndị na-acha uhie uhie na Ezra Ames na José Joaquin de Ferrerz na ihe osise eclipse n'afọ 1806 ma gosipụta ọdịdị nke magnetik ya ọ bụghị nke Maunder Minimum kama na nke okirikiri anyanwụ nke ógé a.[4]